From: Spencer Oliver Date: Mon, 31 Oct 2011 22:31:15 +0000 (+0000) Subject: target: rename cortex_m3.[ch] to cortex_m.[ch] X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=3f8f5839641f79ae1983ac55e7f7d866a971976c;p=fw%2Fopenocd target: rename cortex_m3.[ch] to cortex_m.[ch] This rename is in preparation for cortex_m4 support. Change-Id: Ic08c298ec6ed2aabc2c39db67191f68b3a51f550 Signed-off-by: Spencer Oliver Reviewed-on: http://openocd.zylin.com/147 Tested-by: jenkins Reviewed-by: Øyvind Harboe --- diff --git a/src/target/Makefile.am b/src/target/Makefile.am index 9f7e5e960..03d84ea00 100644 --- a/src/target/Makefile.am +++ b/src/target/Makefile.am @@ -73,7 +73,7 @@ ARMV6_SRC = \ ARMV7_SRC = \ armv7m.c \ - cortex_m3.c \ + cortex_m.c \ armv7a.c \ cortex_a.c @@ -137,7 +137,7 @@ noinst_HEADERS = \ dsp563xx_once.h \ dsp5680xx.h \ breakpoints.h \ - cortex_m3.h \ + cortex_m.h \ cortex_a.h \ embeddedice.h \ etb.h \ diff --git a/src/target/arm_semihosting.c b/src/target/arm_semihosting.c index 903145c52..fba580b48 100644 --- a/src/target/arm_semihosting.c +++ b/src/target/arm_semihosting.c @@ -41,7 +41,7 @@ #include "armv4_5.h" #include "arm7_9_common.h" #include "armv7m.h" -#include "cortex_m3.h" +#include "cortex_m.h" #include "register.h" #include "arm_semihosting.h" #include diff --git a/src/target/cortex_m.c b/src/target/cortex_m.c new file mode 100644 index 000000000..8000b9a81 --- /dev/null +++ b/src/target/cortex_m.c @@ -0,0 +1,2344 @@ +/*************************************************************************** + * Copyright (C) 2005 by Dominic Rath * + * Dominic.Rath@gmx.de * + * * + * Copyright (C) 2006 by Magnus Lundin * + * lundin@mlu.mine.nu * + * * + * Copyright (C) 2008 by Spencer Oliver * + * spen@spen-soft.co.uk * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + * * + * * + * Cortex-M3(tm) TRM, ARM DDI 0337E (r1p1) and 0337G (r2p0) * + * * + ***************************************************************************/ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "breakpoints.h" +#include "cortex_m.h" +#include "target_request.h" +#include "target_type.h" +#include "arm_disassembler.h" +#include "register.h" +#include "arm_opcodes.h" +#include "arm_semihosting.h" +#include + +/* NOTE: most of this should work fine for the Cortex-M1 and + * Cortex-M0 cores too, although they're ARMv6-M not ARMv7-M. + * Some differences: M0/M1 doesn't have FBP remapping or the + * DWT tracing/profiling support. (So the cycle counter will + * not be usable; the other stuff isn't currently used here.) + * + * Although there are some workarounds for errata seen only in r0p0 + * silicon, such old parts are hard to find and thus not much tested + * any longer. + */ + +/** + * Returns the type of a break point required by address location + */ +#define BKPT_TYPE_BY_ADDR(addr) ((addr) < 0x20000000 ? BKPT_HARD : BKPT_SOFT) + + +/* forward declarations */ +static int cortex_m3_set_breakpoint(struct target *target, struct breakpoint *breakpoint); +static int cortex_m3_unset_breakpoint(struct target *target, struct breakpoint *breakpoint); +static void cortex_m3_enable_watchpoints(struct target *target); +static int cortex_m3_store_core_reg_u32(struct target *target, + enum armv7m_regtype type, uint32_t num, uint32_t value); + +static int cortexm3_dap_read_coreregister_u32(struct adiv5_dap *swjdp, + uint32_t *value, int regnum) +{ + int retval; + uint32_t dcrdr; + + /* because the DCB_DCRDR is used for the emulated dcc channel + * we have to save/restore the DCB_DCRDR when used */ + + retval = mem_ap_read_u32(swjdp, DCB_DCRDR, &dcrdr); + if (retval != ERROR_OK) + return retval; + + /* mem_ap_write_u32(swjdp, DCB_DCRSR, regnum); */ + retval = dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRSR & 0xFFFFFFF0); + if (retval != ERROR_OK) + return retval; + retval = dap_queue_ap_write(swjdp, AP_REG_BD0 | (DCB_DCRSR & 0xC), regnum); + if (retval != ERROR_OK) + return retval; + + /* mem_ap_read_u32(swjdp, DCB_DCRDR, value); */ + retval = dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRDR & 0xFFFFFFF0); + if (retval != ERROR_OK) + return retval; + retval = dap_queue_ap_read(swjdp, AP_REG_BD0 | (DCB_DCRDR & 0xC), value); + if (retval != ERROR_OK) + return retval; + + retval = dap_run(swjdp); + if (retval != ERROR_OK) + return retval; + + /* restore DCB_DCRDR - this needs to be in a seperate + * transaction otherwise the emulated DCC channel breaks */ + if (retval == ERROR_OK) + retval = mem_ap_write_atomic_u32(swjdp, DCB_DCRDR, dcrdr); + + return retval; +} + +static int cortexm3_dap_write_coreregister_u32(struct adiv5_dap *swjdp, + uint32_t value, int regnum) +{ + int retval; + uint32_t dcrdr; + + /* because the DCB_DCRDR is used for the emulated dcc channel + * we have to save/restore the DCB_DCRDR when used */ + + retval = mem_ap_read_u32(swjdp, DCB_DCRDR, &dcrdr); + if (retval != ERROR_OK) + return retval; + + /* mem_ap_write_u32(swjdp, DCB_DCRDR, core_regs[i]); */ + retval = dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRDR & 0xFFFFFFF0); + if (retval != ERROR_OK) + return retval; + retval = dap_queue_ap_write(swjdp, AP_REG_BD0 | (DCB_DCRDR & 0xC), value); + // XXX check retval + + /* mem_ap_write_u32(swjdp, DCB_DCRSR, i | DCRSR_WnR); */ + retval = dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRSR & 0xFFFFFFF0); + if (retval != ERROR_OK) + return retval; + retval = dap_queue_ap_write(swjdp, AP_REG_BD0 | (DCB_DCRSR & 0xC), regnum | DCRSR_WnR); + // XXX check retval + + retval = dap_run(swjdp); + + /* restore DCB_DCRDR - this needs to be in a seperate + * transaction otherwise the emulated DCC channel breaks */ + if (retval == ERROR_OK) + retval = mem_ap_write_atomic_u32(swjdp, DCB_DCRDR, dcrdr); + + return retval; +} + +static int cortex_m3_write_debug_halt_mask(struct target *target, + uint32_t mask_on, uint32_t mask_off) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; + + /* mask off status bits */ + cortex_m3->dcb_dhcsr &= ~((0xFFFF << 16) | mask_off); + /* create new register mask */ + cortex_m3->dcb_dhcsr |= DBGKEY | C_DEBUGEN | mask_on; + + return mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, cortex_m3->dcb_dhcsr); +} + +static int cortex_m3_clear_halt(struct target *target) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; + int retval; + + /* clear step if any */ + cortex_m3_write_debug_halt_mask(target, C_HALT, C_STEP); + + /* Read Debug Fault Status Register */ + retval = mem_ap_read_atomic_u32(swjdp, NVIC_DFSR, &cortex_m3->nvic_dfsr); + if (retval != ERROR_OK) + return retval; + + /* Clear Debug Fault Status */ + retval = mem_ap_write_atomic_u32(swjdp, NVIC_DFSR, cortex_m3->nvic_dfsr); + if (retval != ERROR_OK) + return retval; + LOG_DEBUG(" NVIC_DFSR 0x%" PRIx32 "", cortex_m3->nvic_dfsr); + + return ERROR_OK; +} + +static int cortex_m3_single_step_core(struct target *target) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; + uint32_t dhcsr_save; + int retval; + + /* backup dhcsr reg */ + dhcsr_save = cortex_m3->dcb_dhcsr; + + /* Mask interrupts before clearing halt, if done already. This avoids + * Erratum 377497 (fixed in r1p0) where setting MASKINTS while clearing + * HALT can put the core into an unknown state. + */ + if (!(cortex_m3->dcb_dhcsr & C_MASKINTS)) + { + retval = mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, + DBGKEY | C_MASKINTS | C_HALT | C_DEBUGEN); + if (retval != ERROR_OK) + return retval; + } + retval = mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, + DBGKEY | C_MASKINTS | C_STEP | C_DEBUGEN); + if (retval != ERROR_OK) + return retval; + LOG_DEBUG(" "); + + /* restore dhcsr reg */ + cortex_m3->dcb_dhcsr = dhcsr_save; + cortex_m3_clear_halt(target); + + return ERROR_OK; +} + +static int cortex_m3_endreset_event(struct target *target) +{ + int i; + int retval; + uint32_t dcb_demcr; + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct armv7m_common *armv7m = &cortex_m3->armv7m; + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; + struct cortex_m3_fp_comparator *fp_list = cortex_m3->fp_comparator_list; + struct cortex_m3_dwt_comparator *dwt_list = cortex_m3->dwt_comparator_list; + + /* REVISIT The four debug monitor bits are currently ignored... */ + retval = mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &dcb_demcr); + if (retval != ERROR_OK) + return retval; + LOG_DEBUG("DCB_DEMCR = 0x%8.8" PRIx32 "",dcb_demcr); + + /* this register is used for emulated dcc channel */ + retval = mem_ap_write_u32(swjdp, DCB_DCRDR, 0); + if (retval != ERROR_OK) + return retval; + + /* Enable debug requests */ + retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); + if (retval != ERROR_OK) + return retval; + if (!(cortex_m3->dcb_dhcsr & C_DEBUGEN)) + { + retval = mem_ap_write_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN); + if (retval != ERROR_OK) + return retval; + } + + /* clear any interrupt masking */ + cortex_m3_write_debug_halt_mask(target, 0, C_MASKINTS); + + /* Enable features controlled by ITM and DWT blocks, and catch only + * the vectors we were told to pay attention to. + * + * Target firmware is responsible for all fault handling policy + * choices *EXCEPT* explicitly scripted overrides like "vector_catch" + * or manual updates to the NVIC SHCSR and CCR registers. + */ + retval = mem_ap_write_u32(swjdp, DCB_DEMCR, TRCENA | armv7m->demcr); + if (retval != ERROR_OK) + return retval; + + /* Paranoia: evidently some (early?) chips don't preserve all the + * debug state (including FBP, DWT, etc) across reset... + */ + + /* Enable FPB */ + retval = target_write_u32(target, FP_CTRL, 3); + if (retval != ERROR_OK) + return retval; + + cortex_m3->fpb_enabled = 1; + + /* Restore FPB registers */ + for (i = 0; i < cortex_m3->fp_num_code + cortex_m3->fp_num_lit; i++) + { + retval = target_write_u32(target, fp_list[i].fpcr_address, fp_list[i].fpcr_value); + if (retval != ERROR_OK) + return retval; + } + + /* Restore DWT registers */ + for (i = 0; i < cortex_m3->dwt_num_comp; i++) + { + retval = target_write_u32(target, dwt_list[i].dwt_comparator_address + 0, + dwt_list[i].comp); + if (retval != ERROR_OK) + return retval; + retval = target_write_u32(target, dwt_list[i].dwt_comparator_address + 4, + dwt_list[i].mask); + if (retval != ERROR_OK) + return retval; + retval = target_write_u32(target, dwt_list[i].dwt_comparator_address + 8, + dwt_list[i].function); + if (retval != ERROR_OK) + return retval; + } + retval = dap_run(swjdp); + if (retval != ERROR_OK) + return retval; + + register_cache_invalidate(cortex_m3->armv7m.core_cache); + + /* make sure we have latest dhcsr flags */ + retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); + + return retval; +} + +static int cortex_m3_examine_debug_reason(struct target *target) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + + /* THIS IS NOT GOOD, TODO - better logic for detection of debug state reason */ + /* only check the debug reason if we don't know it already */ + + if ((target->debug_reason != DBG_REASON_DBGRQ) + && (target->debug_reason != DBG_REASON_SINGLESTEP)) + { + if (cortex_m3->nvic_dfsr & DFSR_BKPT) + { + target->debug_reason = DBG_REASON_BREAKPOINT; + if (cortex_m3->nvic_dfsr & DFSR_DWTTRAP) + target->debug_reason = DBG_REASON_WPTANDBKPT; + } + else if (cortex_m3->nvic_dfsr & DFSR_DWTTRAP) + target->debug_reason = DBG_REASON_WATCHPOINT; + else if (cortex_m3->nvic_dfsr & DFSR_VCATCH) + target->debug_reason = DBG_REASON_BREAKPOINT; + else /* EXTERNAL, HALTED */ + target->debug_reason = DBG_REASON_UNDEFINED; + } + + return ERROR_OK; +} + +static int cortex_m3_examine_exception_reason(struct target *target) +{ + uint32_t shcsr, except_sr, cfsr = -1, except_ar = -1; + struct armv7m_common *armv7m = target_to_armv7m(target); + struct adiv5_dap *swjdp = &armv7m->dap; + int retval; + + retval = mem_ap_read_u32(swjdp, NVIC_SHCSR, &shcsr); + if (retval != ERROR_OK) + return retval; + switch (armv7m->exception_number) + { + case 2: /* NMI */ + break; + case 3: /* Hard Fault */ + retval = mem_ap_read_atomic_u32(swjdp, NVIC_HFSR, &except_sr); + if (retval != ERROR_OK) + return retval; + if (except_sr & 0x40000000) + { + retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &cfsr); + if (retval != ERROR_OK) + return retval; + } + break; + case 4: /* Memory Management */ + retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr); + if (retval != ERROR_OK) + return retval; + retval = mem_ap_read_u32(swjdp, NVIC_MMFAR, &except_ar); + if (retval != ERROR_OK) + return retval; + break; + case 5: /* Bus Fault */ + retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr); + if (retval != ERROR_OK) + return retval; + retval = mem_ap_read_u32(swjdp, NVIC_BFAR, &except_ar); + if (retval != ERROR_OK) + return retval; + break; + case 6: /* Usage Fault */ + retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr); + if (retval != ERROR_OK) + return retval; + break; + case 11: /* SVCall */ + break; + case 12: /* Debug Monitor */ + retval = mem_ap_read_u32(swjdp, NVIC_DFSR, &except_sr); + if (retval != ERROR_OK) + return retval; + break; + case 14: /* PendSV */ + break; + case 15: /* SysTick */ + break; + default: + except_sr = 0; + break; + } + retval = dap_run(swjdp); + if (retval == ERROR_OK) + LOG_DEBUG("%s SHCSR 0x%" PRIx32 ", SR 0x%" PRIx32 + ", CFSR 0x%" PRIx32 ", AR 0x%" PRIx32, + armv7m_exception_string(armv7m->exception_number), + shcsr, except_sr, cfsr, except_ar); + return retval; +} + +/* PSP is used in some thread modes */ +static const int armv7m_psp_reg_map[17] = { + ARMV7M_R0, ARMV7M_R1, ARMV7M_R2, ARMV7M_R3, + ARMV7M_R4, ARMV7M_R5, ARMV7M_R6, ARMV7M_R7, + ARMV7M_R8, ARMV7M_R9, ARMV7M_R10, ARMV7M_R11, + ARMV7M_R12, ARMV7M_PSP, ARMV7M_R14, ARMV7M_PC, + ARMV7M_xPSR, +}; + +/* MSP is used in handler and some thread modes */ +static const int armv7m_msp_reg_map[17] = { + ARMV7M_R0, ARMV7M_R1, ARMV7M_R2, ARMV7M_R3, + ARMV7M_R4, ARMV7M_R5, ARMV7M_R6, ARMV7M_R7, + ARMV7M_R8, ARMV7M_R9, ARMV7M_R10, ARMV7M_R11, + ARMV7M_R12, ARMV7M_MSP, ARMV7M_R14, ARMV7M_PC, + ARMV7M_xPSR, +}; + +static int cortex_m3_debug_entry(struct target *target) +{ + int i; + uint32_t xPSR; + int retval; + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct armv7m_common *armv7m = &cortex_m3->armv7m; + struct arm *arm = &armv7m->arm; + struct adiv5_dap *swjdp = &armv7m->dap; + struct reg *r; + + LOG_DEBUG(" "); + + cortex_m3_clear_halt(target); + retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); + if (retval != ERROR_OK) + return retval; + + if ((retval = armv7m->examine_debug_reason(target)) != ERROR_OK) + return retval; + + /* Examine target state and mode */ + /* First load register acessible through core debug port*/ + int num_regs = armv7m->core_cache->num_regs; + + for (i = 0; i < num_regs; i++) + { + if (!armv7m->core_cache->reg_list[i].valid) + armv7m->read_core_reg(target, i); + } + + r = armv7m->core_cache->reg_list + ARMV7M_xPSR; + xPSR = buf_get_u32(r->value, 0, 32); + +#ifdef ARMV7_GDB_HACKS + /* FIXME this breaks on scan chains with more than one Cortex-M3. + * Instead, each CM3 should have its own dummy value... + */ + /* copy real xpsr reg for gdb, setting thumb bit */ + buf_set_u32(armv7m_gdb_dummy_cpsr_value, 0, 32, xPSR); + buf_set_u32(armv7m_gdb_dummy_cpsr_value, 5, 1, 1); + armv7m_gdb_dummy_cpsr_reg.valid = r->valid; + armv7m_gdb_dummy_cpsr_reg.dirty = r->dirty; +#endif + + /* For IT instructions xPSR must be reloaded on resume and clear on debug exec */ + if (xPSR & 0xf00) + { + r->dirty = r->valid; + cortex_m3_store_core_reg_u32(target, ARMV7M_REGISTER_CORE_GP, 16, xPSR &~ 0xff); + } + + /* Are we in an exception handler */ + if (xPSR & 0x1FF) + { + armv7m->core_mode = ARMV7M_MODE_HANDLER; + armv7m->exception_number = (xPSR & 0x1FF); + + arm->core_mode = ARM_MODE_HANDLER; + arm->map = armv7m_msp_reg_map; + } + else + { + unsigned control = buf_get_u32(armv7m->core_cache + ->reg_list[ARMV7M_CONTROL].value, 0, 2); + + /* is this thread privileged? */ + armv7m->core_mode = control & 1; + arm->core_mode = armv7m->core_mode + ? ARM_MODE_USER_THREAD + : ARM_MODE_THREAD; + + /* which stack is it using? */ + if (control & 2) + arm->map = armv7m_psp_reg_map; + else + arm->map = armv7m_msp_reg_map; + + armv7m->exception_number = 0; + } + + if (armv7m->exception_number) + { + cortex_m3_examine_exception_reason(target); + } + + LOG_DEBUG("entered debug state in core mode: %s at PC 0x%" PRIx32 ", target->state: %s", + armv7m_mode_strings[armv7m->core_mode], + *(uint32_t*)(arm->pc->value), + target_state_name(target)); + + if (armv7m->post_debug_entry) + { + retval = armv7m->post_debug_entry(target); + if (retval != ERROR_OK) + return retval; + } + + return ERROR_OK; +} + +static int cortex_m3_poll(struct target *target) +{ + int detected_failure = ERROR_OK; + int retval = ERROR_OK; + enum target_state prev_target_state = target->state; + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; + + /* Read from Debug Halting Control and Status Register */ + retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); + if (retval != ERROR_OK) + { + target->state = TARGET_UNKNOWN; + return retval; + } + + /* Recover from lockup. See ARMv7-M architecture spec, + * section B1.5.15 "Unrecoverable exception cases". + */ + if (cortex_m3->dcb_dhcsr & S_LOCKUP) { + LOG_ERROR("%s -- clearing lockup after double fault", + target_name(target)); + cortex_m3_write_debug_halt_mask(target, C_HALT, 0); + target->debug_reason = DBG_REASON_DBGRQ; + + /* We have to execute the rest (the "finally" equivalent, but + * still throw this exception again). + */ + detected_failure = ERROR_FAIL; + + /* refresh status bits */ + retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); + if (retval != ERROR_OK) + return retval; + } + + if (cortex_m3->dcb_dhcsr & S_RESET_ST) + { + /* check if still in reset */ + retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); + if (retval != ERROR_OK) + return retval; + + if (cortex_m3->dcb_dhcsr & S_RESET_ST) + { + target->state = TARGET_RESET; + return ERROR_OK; + } + } + + if (target->state == TARGET_RESET) + { + /* Cannot switch context while running so endreset is + * called with target->state == TARGET_RESET + */ + LOG_DEBUG("Exit from reset with dcb_dhcsr 0x%" PRIx32, + cortex_m3->dcb_dhcsr); + cortex_m3_endreset_event(target); + target->state = TARGET_RUNNING; + prev_target_state = TARGET_RUNNING; + } + + if (cortex_m3->dcb_dhcsr & S_HALT) + { + target->state = TARGET_HALTED; + + if ((prev_target_state == TARGET_RUNNING) || (prev_target_state == TARGET_RESET)) + { + if ((retval = cortex_m3_debug_entry(target)) != ERROR_OK) + return retval; + + if (arm_semihosting(target, &retval) != 0) + return retval; + + target_call_event_callbacks(target, TARGET_EVENT_HALTED); + } + if (prev_target_state == TARGET_DEBUG_RUNNING) + { + LOG_DEBUG(" "); + if ((retval = cortex_m3_debug_entry(target)) != ERROR_OK) + return retval; + + target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED); + } + } + + /* REVISIT when S_SLEEP is set, it's in a Sleep or DeepSleep state. + * How best to model low power modes? + */ + + if (target->state == TARGET_UNKNOWN) + { + /* check if processor is retiring instructions */ + if (cortex_m3->dcb_dhcsr & S_RETIRE_ST) + { + target->state = TARGET_RUNNING; + retval = ERROR_OK; + } + } + + /* Did we detect a failure condition that we cleared? */ + if (detected_failure != ERROR_OK) + retval = detected_failure; + return retval; +} + +static int cortex_m3_halt(struct target *target) +{ + LOG_DEBUG("target->state: %s", + target_state_name(target)); + + if (target->state == TARGET_HALTED) + { + LOG_DEBUG("target was already halted"); + return ERROR_OK; + } + + if (target->state == TARGET_UNKNOWN) + { + LOG_WARNING("target was in unknown state when halt was requested"); + } + + if (target->state == TARGET_RESET) + { + if ((jtag_get_reset_config() & RESET_SRST_PULLS_TRST) && jtag_get_srst()) + { + LOG_ERROR("can't request a halt while in reset if nSRST pulls nTRST"); + return ERROR_TARGET_FAILURE; + } + else + { + /* we came here in a reset_halt or reset_init sequence + * debug entry was already prepared in cortex_m3_prepare_reset_halt() + */ + target->debug_reason = DBG_REASON_DBGRQ; + + return ERROR_OK; + } + } + + /* Write to Debug Halting Control and Status Register */ + cortex_m3_write_debug_halt_mask(target, C_HALT, 0); + + target->debug_reason = DBG_REASON_DBGRQ; + + return ERROR_OK; +} + +static int cortex_m3_soft_reset_halt(struct target *target) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; + uint32_t dcb_dhcsr = 0; + int retval, timeout = 0; + + /* Enter debug state on reset; restore DEMCR in endreset_event() */ + retval = mem_ap_write_u32(swjdp, DCB_DEMCR, + TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET); + if (retval != ERROR_OK) + return retval; + + /* Request a core-only reset */ + retval = mem_ap_write_atomic_u32(swjdp, NVIC_AIRCR, + AIRCR_VECTKEY | AIRCR_VECTRESET); + if (retval != ERROR_OK) + return retval; + target->state = TARGET_RESET; + + /* registers are now invalid */ + register_cache_invalidate(cortex_m3->armv7m.core_cache); + + while (timeout < 100) + { + retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &dcb_dhcsr); + if (retval == ERROR_OK) + { + retval = mem_ap_read_atomic_u32(swjdp, NVIC_DFSR, + &cortex_m3->nvic_dfsr); + if (retval != ERROR_OK) + return retval; + if ((dcb_dhcsr & S_HALT) + && (cortex_m3->nvic_dfsr & DFSR_VCATCH)) + { + LOG_DEBUG("system reset-halted, DHCSR 0x%08x, " + "DFSR 0x%08x", + (unsigned) dcb_dhcsr, + (unsigned) cortex_m3->nvic_dfsr); + cortex_m3_poll(target); + /* FIXME restore user's vector catch config */ + return ERROR_OK; + } + else + LOG_DEBUG("waiting for system reset-halt, " + "DHCSR 0x%08x, %d ms", + (unsigned) dcb_dhcsr, timeout); + } + timeout++; + alive_sleep(1); + } + + return ERROR_OK; +} + +static void cortex_m3_enable_breakpoints(struct target *target) +{ + struct breakpoint *breakpoint = target->breakpoints; + + /* set any pending breakpoints */ + while (breakpoint) + { + if (!breakpoint->set) + cortex_m3_set_breakpoint(target, breakpoint); + breakpoint = breakpoint->next; + } +} + +static int cortex_m3_resume(struct target *target, int current, + uint32_t address, int handle_breakpoints, int debug_execution) +{ + struct armv7m_common *armv7m = target_to_armv7m(target); + struct breakpoint *breakpoint = NULL; + uint32_t resume_pc; + struct reg *r; + + if (target->state != TARGET_HALTED) + { + LOG_WARNING("target not halted"); + return ERROR_TARGET_NOT_HALTED; + } + + if (!debug_execution) + { + target_free_all_working_areas(target); + cortex_m3_enable_breakpoints(target); + cortex_m3_enable_watchpoints(target); + } + + if (debug_execution) + { + r = armv7m->core_cache->reg_list + ARMV7M_PRIMASK; + + /* Disable interrupts */ + /* We disable interrupts in the PRIMASK register instead of + * masking with C_MASKINTS. This is probably the same issue + * as Cortex-M3 Erratum 377493 (fixed in r1p0): C_MASKINTS + * in parallel with disabled interrupts can cause local faults + * to not be taken. + * + * REVISIT this clearly breaks non-debug execution, since the + * PRIMASK register state isn't saved/restored... workaround + * by never resuming app code after debug execution. + */ + buf_set_u32(r->value, 0, 1, 1); + r->dirty = true; + r->valid = true; + + /* Make sure we are in Thumb mode */ + r = armv7m->core_cache->reg_list + ARMV7M_xPSR; + buf_set_u32(r->value, 24, 1, 1); + r->dirty = true; + r->valid = true; + } + + /* current = 1: continue on current pc, otherwise continue at
*/ + r = armv7m->arm.pc; + if (!current) + { + buf_set_u32(r->value, 0, 32, address); + r->dirty = true; + r->valid = true; + } + + /* if we halted last time due to a bkpt instruction + * then we have to manually step over it, otherwise + * the core will break again */ + + if (!breakpoint_find(target, buf_get_u32(r->value, 0, 32)) + && !debug_execution) + { + armv7m_maybe_skip_bkpt_inst(target, NULL); + } + + resume_pc = buf_get_u32(r->value, 0, 32); + + armv7m_restore_context(target); + + /* the front-end may request us not to handle breakpoints */ + if (handle_breakpoints) + { + /* Single step past breakpoint at current address */ + if ((breakpoint = breakpoint_find(target, resume_pc))) + { + LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32 " (ID: %d)", + breakpoint->address, + breakpoint->unique_id); + cortex_m3_unset_breakpoint(target, breakpoint); + cortex_m3_single_step_core(target); + cortex_m3_set_breakpoint(target, breakpoint); + } + } + + /* Restart core */ + cortex_m3_write_debug_halt_mask(target, 0, C_HALT); + + target->debug_reason = DBG_REASON_NOTHALTED; + + /* registers are now invalid */ + register_cache_invalidate(armv7m->core_cache); + + if (!debug_execution) + { + target->state = TARGET_RUNNING; + target_call_event_callbacks(target, TARGET_EVENT_RESUMED); + LOG_DEBUG("target resumed at 0x%" PRIx32 "", resume_pc); + } + else + { + target->state = TARGET_DEBUG_RUNNING; + target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED); + LOG_DEBUG("target debug resumed at 0x%" PRIx32 "", resume_pc); + } + + return ERROR_OK; +} + +/* int irqstepcount = 0; */ +static int cortex_m3_step(struct target *target, int current, + uint32_t address, int handle_breakpoints) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct armv7m_common *armv7m = &cortex_m3->armv7m; + struct adiv5_dap *swjdp = &armv7m->dap; + struct breakpoint *breakpoint = NULL; + struct reg *pc = armv7m->arm.pc; + bool bkpt_inst_found = false; + int retval; + bool isr_timed_out = false; + + if (target->state != TARGET_HALTED) + { + LOG_WARNING("target not halted"); + return ERROR_TARGET_NOT_HALTED; + } + + /* current = 1: continue on current pc, otherwise continue at
*/ + if (!current) + buf_set_u32(pc->value, 0, 32, address); + + uint32_t pc_value = buf_get_u32(pc->value, 0, 32); + + /* the front-end may request us not to handle breakpoints */ + if (handle_breakpoints) { + breakpoint = breakpoint_find(target, pc_value); + if (breakpoint) + cortex_m3_unset_breakpoint(target, breakpoint); + } + + armv7m_maybe_skip_bkpt_inst(target, &bkpt_inst_found); + + target->debug_reason = DBG_REASON_SINGLESTEP; + + armv7m_restore_context(target); + + target_call_event_callbacks(target, TARGET_EVENT_RESUMED); + + /* if no bkpt instruction is found at pc then we can perform + * a normal step, otherwise we have to manually step over the bkpt + * instruction - as such simulate a step */ + if (bkpt_inst_found == false) + { + /* Automatic ISR masking mode off: Just step over the next instruction */ + if ((cortex_m3->isrmasking_mode != CORTEX_M3_ISRMASK_AUTO)) + { + cortex_m3_write_debug_halt_mask(target, C_STEP, C_HALT); + } + else + { + /* Process interrupts during stepping in a way they don't interfere + * debugging. + * + * Principle: + * + * Set a temporary break point at the current pc and let the core run + * with interrupts enabled. Pending interrupts get served and we run + * into the breakpoint again afterwards. Then we step over the next + * instruction with interrupts disabled. + * + * If the pending interrupts don't complete within time, we leave the + * core running. This may happen if the interrupts trigger faster + * than the core can process them or the handler doesn't return. + * + * If no more breakpoints are available we simply do a step with + * interrupts enabled. + * + */ + + /* Set a temporary break point */ + retval = breakpoint_add(target, pc_value , 2, BKPT_TYPE_BY_ADDR(pc_value)); + bool tmp_bp_set = (retval == ERROR_OK); + + /* No more breakpoints left, just do a step */ + if (!tmp_bp_set) + { + cortex_m3_write_debug_halt_mask(target, C_STEP, C_HALT); + } + else + { + /* Start the core */ + LOG_DEBUG("Starting core to serve pending interrupts"); + int64_t t_start = timeval_ms(); + cortex_m3_write_debug_halt_mask(target, 0, C_HALT | C_STEP); + + /* Wait for pending handlers to complete or timeout */ + do { + retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); + if (retval != ERROR_OK) + { + target->state = TARGET_UNKNOWN; + return retval; + } + isr_timed_out = ((timeval_ms() - t_start) > 500); + } while (!((cortex_m3->dcb_dhcsr & S_HALT) || isr_timed_out)); + + /* Remove the temporary breakpoint */ + breakpoint_remove(target, pc_value); + + if (isr_timed_out) + { + LOG_DEBUG("Interrupt handlers didn't complete within time, " + "leaving target running"); + } + else + { + /* Step over next instruction with interrupts disabled */ + cortex_m3_write_debug_halt_mask(target, C_HALT | C_MASKINTS, 0); + cortex_m3_write_debug_halt_mask(target, C_STEP, C_HALT); + /* Re-enable interrupts */ + cortex_m3_write_debug_halt_mask(target, C_HALT, C_MASKINTS); + } + } + } + } + + retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); + if (retval != ERROR_OK) + return retval; + + /* registers are now invalid */ + register_cache_invalidate(cortex_m3->armv7m.core_cache); + + if (breakpoint) + cortex_m3_set_breakpoint(target, breakpoint); + + if (isr_timed_out) { + /* Leave the core running. The user has to stop execution manually. */ + target->debug_reason = DBG_REASON_NOTHALTED; + target->state = TARGET_RUNNING; + return ERROR_OK; + } + + LOG_DEBUG("target stepped dcb_dhcsr = 0x%" PRIx32 + " nvic_icsr = 0x%" PRIx32, + cortex_m3->dcb_dhcsr, cortex_m3->nvic_icsr); + + retval = cortex_m3_debug_entry(target); + if (retval != ERROR_OK) + return retval; + target_call_event_callbacks(target, TARGET_EVENT_HALTED); + + LOG_DEBUG("target stepped dcb_dhcsr = 0x%" PRIx32 + " nvic_icsr = 0x%" PRIx32, + cortex_m3->dcb_dhcsr, cortex_m3->nvic_icsr); + + return ERROR_OK; +} + +static int cortex_m3_assert_reset(struct target *target) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; + enum cortex_m3_soft_reset_config reset_config = cortex_m3->soft_reset_config; + + LOG_DEBUG("target->state: %s", + target_state_name(target)); + + enum reset_types jtag_reset_config = jtag_get_reset_config(); + + if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT)) { + /* allow scripts to override the reset event */ + + target_handle_event(target, TARGET_EVENT_RESET_ASSERT); + register_cache_invalidate(cortex_m3->armv7m.core_cache); + target->state = TARGET_RESET; + + return ERROR_OK; + } + + /* Enable debug requests */ + int retval; + retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); + if (retval != ERROR_OK) + return retval; + if (!(cortex_m3->dcb_dhcsr & C_DEBUGEN)) + { + retval = mem_ap_write_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN); + if (retval != ERROR_OK) + return retval; + } + + retval = mem_ap_write_u32(swjdp, DCB_DCRDR, 0); + if (retval != ERROR_OK) + return retval; + + if (!target->reset_halt) + { + /* Set/Clear C_MASKINTS in a separate operation */ + if (cortex_m3->dcb_dhcsr & C_MASKINTS) + { + retval = mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, + DBGKEY | C_DEBUGEN | C_HALT); + if (retval != ERROR_OK) + return retval; + } + + /* clear any debug flags before resuming */ + cortex_m3_clear_halt(target); + + /* clear C_HALT in dhcsr reg */ + cortex_m3_write_debug_halt_mask(target, 0, C_HALT); + } + else + { + /* Halt in debug on reset; endreset_event() restores DEMCR. + * + * REVISIT catching BUSERR presumably helps to defend against + * bad vector table entries. Should this include MMERR or + * other flags too? + */ + retval = mem_ap_write_atomic_u32(swjdp, DCB_DEMCR, + TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET); + if (retval != ERROR_OK) + return retval; + } + + if (jtag_reset_config & RESET_HAS_SRST) + { + /* default to asserting srst */ + if (jtag_reset_config & RESET_SRST_PULLS_TRST) + { + jtag_add_reset(1, 1); + } + else + { + jtag_add_reset(0, 1); + } + } + else + { + /* Use a standard Cortex-M3 software reset mechanism. + * We default to using VECRESET as it is supported on all current cores. + * This has the disadvantage of not resetting the peripherals, so a + * reset-init event handler is needed to perform any peripheral resets. + */ + retval = mem_ap_write_atomic_u32(swjdp, NVIC_AIRCR, + AIRCR_VECTKEY | ((reset_config == CORTEX_M3_RESET_SYSRESETREQ) + ? AIRCR_SYSRESETREQ : AIRCR_VECTRESET)); + if (retval != ERROR_OK) + return retval; + + LOG_DEBUG("Using Cortex-M3 %s", (reset_config == CORTEX_M3_RESET_SYSRESETREQ) + ? "SYSRESETREQ" : "VECTRESET"); + + if (reset_config == CORTEX_M3_RESET_VECTRESET) { + LOG_WARNING("Only resetting the Cortex-M3 core, use a reset-init event " + "handler to reset any peripherals"); + } + + { + /* I do not know why this is necessary, but it + * fixes strange effects (step/resume cause NMI + * after reset) on LM3S6918 -- Michael Schwingen + */ + uint32_t tmp; + retval = mem_ap_read_atomic_u32(swjdp, NVIC_AIRCR, &tmp); + if (retval != ERROR_OK) + return retval; + } + } + + target->state = TARGET_RESET; + jtag_add_sleep(50000); + + register_cache_invalidate(cortex_m3->armv7m.core_cache); + + if (target->reset_halt) + { + if ((retval = target_halt(target)) != ERROR_OK) + return retval; + } + + return ERROR_OK; +} + +static int cortex_m3_deassert_reset(struct target *target) +{ + LOG_DEBUG("target->state: %s", + target_state_name(target)); + + /* deassert reset lines */ + jtag_add_reset(0, 0); + + return ERROR_OK; +} + +static int +cortex_m3_set_breakpoint(struct target *target, struct breakpoint *breakpoint) +{ + int retval; + int fp_num = 0; + uint32_t hilo; + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct cortex_m3_fp_comparator *comparator_list = cortex_m3->fp_comparator_list; + + if (breakpoint->set) + { + LOG_WARNING("breakpoint (BPID: %d) already set", breakpoint->unique_id); + return ERROR_OK; + } + + if (cortex_m3->auto_bp_type) + { + breakpoint->type = BKPT_TYPE_BY_ADDR(breakpoint->address); + } + + if (breakpoint->type == BKPT_HARD) + { + while (comparator_list[fp_num].used && (fp_num < cortex_m3->fp_num_code)) + fp_num++; + if (fp_num >= cortex_m3->fp_num_code) + { + LOG_ERROR("Can not find free FPB Comparator!"); + return ERROR_FAIL; + } + breakpoint->set = fp_num + 1; + hilo = (breakpoint->address & 0x2) ? FPCR_REPLACE_BKPT_HIGH : FPCR_REPLACE_BKPT_LOW; + comparator_list[fp_num].used = 1; + comparator_list[fp_num].fpcr_value = (breakpoint->address & 0x1FFFFFFC) | hilo | 1; + target_write_u32(target, comparator_list[fp_num].fpcr_address, comparator_list[fp_num].fpcr_value); + LOG_DEBUG("fpc_num %i fpcr_value 0x%" PRIx32 "", fp_num, comparator_list[fp_num].fpcr_value); + if (!cortex_m3->fpb_enabled) + { + LOG_DEBUG("FPB wasn't enabled, do it now"); + target_write_u32(target, FP_CTRL, 3); + } + } + else if (breakpoint->type == BKPT_SOFT) + { + uint8_t code[4]; + + /* NOTE: on ARMv6-M and ARMv7-M, BKPT(0xab) is used for + * semihosting; don't use that. Otherwise the BKPT + * parameter is arbitrary. + */ + buf_set_u32(code, 0, 32, ARMV5_T_BKPT(0x11)); + retval = target_read_memory(target, + breakpoint->address & 0xFFFFFFFE, + breakpoint->length, 1, + breakpoint->orig_instr); + if (retval != ERROR_OK) + return retval; + retval = target_write_memory(target, + breakpoint->address & 0xFFFFFFFE, + breakpoint->length, 1, + code); + if (retval != ERROR_OK) + return retval; + breakpoint->set = true; + } + + LOG_DEBUG("BPID: %d, Type: %d, Address: 0x%08" PRIx32 " Length: %d (set=%d)", + breakpoint->unique_id, + (int)(breakpoint->type), + breakpoint->address, + breakpoint->length, + breakpoint->set); + + return ERROR_OK; +} + +static int +cortex_m3_unset_breakpoint(struct target *target, struct breakpoint *breakpoint) +{ + int retval; + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct cortex_m3_fp_comparator * comparator_list = cortex_m3->fp_comparator_list; + + if (!breakpoint->set) + { + LOG_WARNING("breakpoint not set"); + return ERROR_OK; + } + + LOG_DEBUG("BPID: %d, Type: %d, Address: 0x%08" PRIx32 " Length: %d (set=%d)", + breakpoint->unique_id, + (int)(breakpoint->type), + breakpoint->address, + breakpoint->length, + breakpoint->set); + + if (breakpoint->type == BKPT_HARD) + { + int fp_num = breakpoint->set - 1; + if ((fp_num < 0) || (fp_num >= cortex_m3->fp_num_code)) + { + LOG_DEBUG("Invalid FP Comparator number in breakpoint"); + return ERROR_OK; + } + comparator_list[fp_num].used = 0; + comparator_list[fp_num].fpcr_value = 0; + target_write_u32(target, comparator_list[fp_num].fpcr_address, comparator_list[fp_num].fpcr_value); + } + else + { + /* restore original instruction (kept in target endianness) */ + if (breakpoint->length == 4) + { + if ((retval = target_write_memory(target, breakpoint->address & 0xFFFFFFFE, 4, 1, breakpoint->orig_instr)) != ERROR_OK) + { + return retval; + } + } + else + { + if ((retval = target_write_memory(target, breakpoint->address & 0xFFFFFFFE, 2, 1, breakpoint->orig_instr)) != ERROR_OK) + { + return retval; + } + } + } + breakpoint->set = false; + + return ERROR_OK; +} + +static int +cortex_m3_add_breakpoint(struct target *target, struct breakpoint *breakpoint) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + + if (cortex_m3->auto_bp_type) + { + breakpoint->type = BKPT_TYPE_BY_ADDR(breakpoint->address); +#ifdef ARMV7_GDB_HACKS + if (breakpoint->length != 2) { + /* XXX Hack: Replace all breakpoints with length != 2 with + * a hardware breakpoint. */ + breakpoint->type = BKPT_HARD; + breakpoint->length = 2; + } +#endif + } + + if(breakpoint->type != BKPT_TYPE_BY_ADDR(breakpoint->address)) { + if (breakpoint->type == BKPT_HARD) + { + LOG_INFO("flash patch comparator requested outside code memory region"); + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + } + + if (breakpoint->type == BKPT_SOFT) + { + LOG_INFO("soft breakpoint requested in code (flash) memory region"); + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + } + } + + if ((breakpoint->type == BKPT_HARD) && (cortex_m3->fp_code_available < 1)) + { + LOG_INFO("no flash patch comparator unit available for hardware breakpoint"); + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + } + + if ((breakpoint->length != 2)) + { + LOG_INFO("only breakpoints of two bytes length supported"); + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + } + + if (breakpoint->type == BKPT_HARD) + cortex_m3->fp_code_available--; + + return cortex_m3_set_breakpoint(target, breakpoint); +} + +static int +cortex_m3_remove_breakpoint(struct target *target, struct breakpoint *breakpoint) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + + /* REVISIT why check? FBP can be updated with core running ... */ + if (target->state != TARGET_HALTED) + { + LOG_WARNING("target not halted"); + return ERROR_TARGET_NOT_HALTED; + } + + if (cortex_m3->auto_bp_type) + { + breakpoint->type = BKPT_TYPE_BY_ADDR(breakpoint->address); + } + + if (breakpoint->set) + { + cortex_m3_unset_breakpoint(target, breakpoint); + } + + if (breakpoint->type == BKPT_HARD) + cortex_m3->fp_code_available++; + + return ERROR_OK; +} + +static int +cortex_m3_set_watchpoint(struct target *target, struct watchpoint *watchpoint) +{ + int dwt_num = 0; + uint32_t mask, temp; + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + + /* watchpoint params were validated earlier */ + mask = 0; + temp = watchpoint->length; + while (temp) { + temp >>= 1; + mask++; + } + mask--; + + /* REVISIT Don't fully trust these "not used" records ... users + * may set up breakpoints by hand, e.g. dual-address data value + * watchpoint using comparator #1; comparator #0 matching cycle + * count; send data trace info through ITM and TPIU; etc + */ + struct cortex_m3_dwt_comparator *comparator; + + for (comparator = cortex_m3->dwt_comparator_list; + comparator->used && dwt_num < cortex_m3->dwt_num_comp; + comparator++, dwt_num++) + continue; + if (dwt_num >= cortex_m3->dwt_num_comp) + { + LOG_ERROR("Can not find free DWT Comparator"); + return ERROR_FAIL; + } + comparator->used = 1; + watchpoint->set = dwt_num + 1; + + comparator->comp = watchpoint->address; + target_write_u32(target, comparator->dwt_comparator_address + 0, + comparator->comp); + + comparator->mask = mask; + target_write_u32(target, comparator->dwt_comparator_address + 4, + comparator->mask); + + switch (watchpoint->rw) { + case WPT_READ: + comparator->function = 5; + break; + case WPT_WRITE: + comparator->function = 6; + break; + case WPT_ACCESS: + comparator->function = 7; + break; + } + target_write_u32(target, comparator->dwt_comparator_address + 8, + comparator->function); + + LOG_DEBUG("Watchpoint (ID %d) DWT%d 0x%08x 0x%x 0x%05x", + watchpoint->unique_id, dwt_num, + (unsigned) comparator->comp, + (unsigned) comparator->mask, + (unsigned) comparator->function); + return ERROR_OK; +} + +static int +cortex_m3_unset_watchpoint(struct target *target, struct watchpoint *watchpoint) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct cortex_m3_dwt_comparator *comparator; + int dwt_num; + + if (!watchpoint->set) + { + LOG_WARNING("watchpoint (wpid: %d) not set", + watchpoint->unique_id); + return ERROR_OK; + } + + dwt_num = watchpoint->set - 1; + + LOG_DEBUG("Watchpoint (ID %d) DWT%d address: 0x%08x clear", + watchpoint->unique_id, dwt_num, + (unsigned) watchpoint->address); + + if ((dwt_num < 0) || (dwt_num >= cortex_m3->dwt_num_comp)) + { + LOG_DEBUG("Invalid DWT Comparator number in watchpoint"); + return ERROR_OK; + } + + comparator = cortex_m3->dwt_comparator_list + dwt_num; + comparator->used = 0; + comparator->function = 0; + target_write_u32(target, comparator->dwt_comparator_address + 8, + comparator->function); + + watchpoint->set = false; + + return ERROR_OK; +} + +static int +cortex_m3_add_watchpoint(struct target *target, struct watchpoint *watchpoint) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + + if (cortex_m3->dwt_comp_available < 1) + { + LOG_DEBUG("no comparators?"); + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + } + + /* hardware doesn't support data value masking */ + if (watchpoint->mask != ~(uint32_t)0) { + LOG_DEBUG("watchpoint value masks not supported"); + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + } + + /* hardware allows address masks of up to 32K */ + unsigned mask; + + for (mask = 0; mask < 16; mask++) { + if ((1u << mask) == watchpoint->length) + break; + } + if (mask == 16) { + LOG_DEBUG("unsupported watchpoint length"); + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + } + if (watchpoint->address & ((1 << mask) - 1)) { + LOG_DEBUG("watchpoint address is unaligned"); + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + } + + /* Caller doesn't seem to be able to describe watching for data + * values of zero; that flags "no value". + * + * REVISIT This DWT may well be able to watch for specific data + * values. Requires comparator #1 to set DATAVMATCH and match + * the data, and another comparator (DATAVADDR0) matching addr. + */ + if (watchpoint->value) { + LOG_DEBUG("data value watchpoint not YET supported"); + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + } + + cortex_m3->dwt_comp_available--; + LOG_DEBUG("dwt_comp_available: %d", cortex_m3->dwt_comp_available); + + return ERROR_OK; +} + +static int +cortex_m3_remove_watchpoint(struct target *target, struct watchpoint *watchpoint) +{ + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + + /* REVISIT why check? DWT can be updated with core running ... */ + if (target->state != TARGET_HALTED) + { + LOG_WARNING("target not halted"); + return ERROR_TARGET_NOT_HALTED; + } + + if (watchpoint->set) + { + cortex_m3_unset_watchpoint(target, watchpoint); + } + + cortex_m3->dwt_comp_available++; + LOG_DEBUG("dwt_comp_available: %d", cortex_m3->dwt_comp_available); + + return ERROR_OK; +} + +static void cortex_m3_enable_watchpoints(struct target *target) +{ + struct watchpoint *watchpoint = target->watchpoints; + + /* set any pending watchpoints */ + while (watchpoint) + { + if (!watchpoint->set) + cortex_m3_set_watchpoint(target, watchpoint); + watchpoint = watchpoint->next; + } +} + +static int cortex_m3_load_core_reg_u32(struct target *target, + enum armv7m_regtype type, uint32_t num, uint32_t * value) +{ + int retval; + struct armv7m_common *armv7m = target_to_armv7m(target); + struct adiv5_dap *swjdp = &armv7m->dap; + + /* NOTE: we "know" here that the register identifiers used + * in the v7m header match the Cortex-M3 Debug Core Register + * Selector values for R0..R15, xPSR, MSP, and PSP. + */ + switch (num) { + case 0 ... 18: + /* read a normal core register */ + retval = cortexm3_dap_read_coreregister_u32(swjdp, value, num); + + if (retval != ERROR_OK) + { + LOG_ERROR("JTAG failure %i",retval); + return ERROR_JTAG_DEVICE_ERROR; + } + LOG_DEBUG("load from core reg %i value 0x%" PRIx32 "",(int)num,*value); + break; + + case ARMV7M_PRIMASK: + case ARMV7M_BASEPRI: + case ARMV7M_FAULTMASK: + case ARMV7M_CONTROL: + /* Cortex-M3 packages these four registers as bitfields + * in one Debug Core register. So say r0 and r2 docs; + * it was removed from r1 docs, but still works. + */ + cortexm3_dap_read_coreregister_u32(swjdp, value, 20); + + switch (num) + { + case ARMV7M_PRIMASK: + *value = buf_get_u32((uint8_t*)value, 0, 1); + break; + + case ARMV7M_BASEPRI: + *value = buf_get_u32((uint8_t*)value, 8, 8); + break; + + case ARMV7M_FAULTMASK: + *value = buf_get_u32((uint8_t*)value, 16, 1); + break; + + case ARMV7M_CONTROL: + *value = buf_get_u32((uint8_t*)value, 24, 2); + break; + } + + LOG_DEBUG("load from special reg %i value 0x%" PRIx32 "", (int)num, *value); + break; + + default: + return ERROR_INVALID_ARGUMENTS; + } + + return ERROR_OK; +} + +static int cortex_m3_store_core_reg_u32(struct target *target, + enum armv7m_regtype type, uint32_t num, uint32_t value) +{ + int retval; + uint32_t reg; + struct armv7m_common *armv7m = target_to_armv7m(target); + struct adiv5_dap *swjdp = &armv7m->dap; + +#ifdef ARMV7_GDB_HACKS + /* If the LR register is being modified, make sure it will put us + * in "thumb" mode, or an INVSTATE exception will occur. This is a + * hack to deal with the fact that gdb will sometimes "forge" + * return addresses, and doesn't set the LSB correctly (i.e., when + * printing expressions containing function calls, it sets LR = 0.) + * Valid exception return codes have bit 0 set too. + */ + if (num == ARMV7M_R14) + value |= 0x01; +#endif + + /* NOTE: we "know" here that the register identifiers used + * in the v7m header match the Cortex-M3 Debug Core Register + * Selector values for R0..R15, xPSR, MSP, and PSP. + */ + switch (num) { + case 0 ... 18: + retval = cortexm3_dap_write_coreregister_u32(swjdp, value, num); + if (retval != ERROR_OK) + { + struct reg *r; + + LOG_ERROR("JTAG failure"); + r = armv7m->core_cache->reg_list + num; + r->dirty = r->valid; + return ERROR_JTAG_DEVICE_ERROR; + } + LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", (int)num, value); + break; + + case ARMV7M_PRIMASK: + case ARMV7M_BASEPRI: + case ARMV7M_FAULTMASK: + case ARMV7M_CONTROL: + /* Cortex-M3 packages these four registers as bitfields + * in one Debug Core register. So say r0 and r2 docs; + * it was removed from r1 docs, but still works. + */ + cortexm3_dap_read_coreregister_u32(swjdp, ®, 20); + + switch (num) + { + case ARMV7M_PRIMASK: + buf_set_u32((uint8_t*)®, 0, 1, value); + break; + + case ARMV7M_BASEPRI: + buf_set_u32((uint8_t*)®, 8, 8, value); + break; + + case ARMV7M_FAULTMASK: + buf_set_u32((uint8_t*)®, 16, 1, value); + break; + + case ARMV7M_CONTROL: + buf_set_u32((uint8_t*)®, 24, 2, value); + break; + } + + cortexm3_dap_write_coreregister_u32(swjdp, reg, 20); + + LOG_DEBUG("write special reg %i value 0x%" PRIx32 " ", (int)num, value); + break; + + default: + return ERROR_INVALID_ARGUMENTS; + } + + return ERROR_OK; +} + +static int cortex_m3_read_memory(struct target *target, uint32_t address, + uint32_t size, uint32_t count, uint8_t *buffer) +{ + struct armv7m_common *armv7m = target_to_armv7m(target); + struct adiv5_dap *swjdp = &armv7m->dap; + int retval = ERROR_INVALID_ARGUMENTS; + + /* cortex_m3 handles unaligned memory access */ + if (count && buffer) { + switch (size) { + case 4: + retval = mem_ap_read_buf_u32(swjdp, buffer, 4 * count, address); + break; + case 2: + retval = mem_ap_read_buf_u16(swjdp, buffer, 2 * count, address); + break; + case 1: + retval = mem_ap_read_buf_u8(swjdp, buffer, count, address); + break; + } + } + + return retval; +} + +static int cortex_m3_write_memory(struct target *target, uint32_t address, + uint32_t size, uint32_t count, const uint8_t *buffer) +{ + struct armv7m_common *armv7m = target_to_armv7m(target); + struct adiv5_dap *swjdp = &armv7m->dap; + int retval = ERROR_INVALID_ARGUMENTS; + + if (count && buffer) { + switch (size) { + case 4: + retval = mem_ap_write_buf_u32(swjdp, buffer, 4 * count, address); + break; + case 2: + retval = mem_ap_write_buf_u16(swjdp, buffer, 2 * count, address); + break; + case 1: + retval = mem_ap_write_buf_u8(swjdp, buffer, count, address); + break; + } + } + + return retval; +} + +static int cortex_m3_bulk_write_memory(struct target *target, uint32_t address, + uint32_t count, const uint8_t *buffer) +{ + return cortex_m3_write_memory(target, address, 4, count, buffer); +} + +static int cortex_m3_init_target(struct command_context *cmd_ctx, + struct target *target) +{ + armv7m_build_reg_cache(target); + return ERROR_OK; +} + +/* REVISIT cache valid/dirty bits are unmaintained. We could set "valid" + * on r/w if the core is not running, and clear on resume or reset ... or + * at least, in a post_restore_context() method. + */ + +struct dwt_reg_state { + struct target *target; + uint32_t addr; + uint32_t value; /* scratch/cache */ +}; + +static int cortex_m3_dwt_get_reg(struct reg *reg) +{ + struct dwt_reg_state *state = reg->arch_info; + + return target_read_u32(state->target, state->addr, &state->value); +} + +static int cortex_m3_dwt_set_reg(struct reg *reg, uint8_t *buf) +{ + struct dwt_reg_state *state = reg->arch_info; + + return target_write_u32(state->target, state->addr, + buf_get_u32(buf, 0, reg->size)); +} + +struct dwt_reg { + uint32_t addr; + char *name; + unsigned size; +}; + +static struct dwt_reg dwt_base_regs[] = { + { DWT_CTRL, "dwt_ctrl", 32, }, + /* NOTE that Erratum 532314 (fixed r2p0) affects CYCCNT: it wrongly + * increments while the core is asleep. + */ + { DWT_CYCCNT, "dwt_cyccnt", 32, }, + /* plus some 8 bit counters, useful for profiling with TPIU */ +}; + +static struct dwt_reg dwt_comp[] = { +#define DWT_COMPARATOR(i) \ + { DWT_COMP0 + 0x10 * (i), "dwt_" #i "_comp", 32, }, \ + { DWT_MASK0 + 0x10 * (i), "dwt_" #i "_mask", 4, }, \ + { DWT_FUNCTION0 + 0x10 * (i), "dwt_" #i "_function", 32, } + DWT_COMPARATOR(0), + DWT_COMPARATOR(1), + DWT_COMPARATOR(2), + DWT_COMPARATOR(3), +#undef DWT_COMPARATOR +}; + +static const struct reg_arch_type dwt_reg_type = { + .get = cortex_m3_dwt_get_reg, + .set = cortex_m3_dwt_set_reg, +}; + +static void +cortex_m3_dwt_addreg(struct target *t, struct reg *r, struct dwt_reg *d) +{ + struct dwt_reg_state *state; + + state = calloc(1, sizeof *state); + if (!state) + return; + state->addr = d->addr; + state->target = t; + + r->name = d->name; + r->size = d->size; + r->value = &state->value; + r->arch_info = state; + r->type = &dwt_reg_type; +} + +static void +cortex_m3_dwt_setup(struct cortex_m3_common *cm3, struct target *target) +{ + uint32_t dwtcr; + struct reg_cache *cache; + struct cortex_m3_dwt_comparator *comparator; + int reg, i; + + target_read_u32(target, DWT_CTRL, &dwtcr); + if (!dwtcr) { + LOG_DEBUG("no DWT"); + return; + } + + cm3->dwt_num_comp = (dwtcr >> 28) & 0xF; + cm3->dwt_comp_available = cm3->dwt_num_comp; + cm3->dwt_comparator_list = calloc(cm3->dwt_num_comp, + sizeof(struct cortex_m3_dwt_comparator)); + if (!cm3->dwt_comparator_list) { +fail0: + cm3->dwt_num_comp = 0; + LOG_ERROR("out of mem"); + return; + } + + cache = calloc(1, sizeof *cache); + if (!cache) { +fail1: + free(cm3->dwt_comparator_list); + goto fail0; + } + cache->name = "cortex-m3 dwt registers"; + cache->num_regs = 2 + cm3->dwt_num_comp * 3; + cache->reg_list = calloc(cache->num_regs, sizeof *cache->reg_list); + if (!cache->reg_list) { + free(cache); + goto fail1; + } + + for (reg = 0; reg < 2; reg++) + cortex_m3_dwt_addreg(target, cache->reg_list + reg, + dwt_base_regs + reg); + + comparator = cm3->dwt_comparator_list; + for (i = 0; i < cm3->dwt_num_comp; i++, comparator++) { + int j; + + comparator->dwt_comparator_address = DWT_COMP0 + 0x10 * i; + for (j = 0; j < 3; j++, reg++) + cortex_m3_dwt_addreg(target, cache->reg_list + reg, + dwt_comp + 3 * i + j); + } + + *register_get_last_cache_p(&target->reg_cache) = cache; + cm3->dwt_cache = cache; + + LOG_DEBUG("DWT dwtcr 0x%" PRIx32 ", comp %d, watch%s", + dwtcr, cm3->dwt_num_comp, + (dwtcr & (0xf << 24)) ? " only" : "/trigger"); + + /* REVISIT: if num_comp > 1, check whether comparator #1 can + * implement single-address data value watchpoints ... so we + * won't need to check it later, when asked to set one up. + */ +} + +static int cortex_m3_examine(struct target *target) +{ + int retval; + uint32_t cpuid, fpcr; + int i; + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; + + if ((retval = ahbap_debugport_init(swjdp)) != ERROR_OK) + return retval; + + if (!target_was_examined(target)) + { + target_set_examined(target); + + /* Read from Device Identification Registers */ + retval = target_read_u32(target, CPUID, &cpuid); + if (retval != ERROR_OK) + return retval; + + if (((cpuid >> 4) & 0xc3f) == 0xc23) + LOG_DEBUG("Cortex-M3 r%" PRId8 "p%" PRId8 " processor detected", + (uint8_t)((cpuid >> 20) & 0xf), (uint8_t)((cpuid >> 0) & 0xf)); + LOG_DEBUG("cpuid: 0x%8.8" PRIx32 "", cpuid); + + /* NOTE: FPB and DWT are both optional. */ + + /* Setup FPB */ + target_read_u32(target, FP_CTRL, &fpcr); + cortex_m3->auto_bp_type = 1; + cortex_m3->fp_num_code = ((fpcr >> 8) & 0x70) | ((fpcr >> 4) & 0xF); /* bits [14:12] and [7:4] */ + cortex_m3->fp_num_lit = (fpcr >> 8) & 0xF; + cortex_m3->fp_code_available = cortex_m3->fp_num_code; + cortex_m3->fp_comparator_list = calloc(cortex_m3->fp_num_code + cortex_m3->fp_num_lit, sizeof(struct cortex_m3_fp_comparator)); + cortex_m3->fpb_enabled = fpcr & 1; + for (i = 0; i < cortex_m3->fp_num_code + cortex_m3->fp_num_lit; i++) + { + cortex_m3->fp_comparator_list[i].type = (i < cortex_m3->fp_num_code) ? FPCR_CODE : FPCR_LITERAL; + cortex_m3->fp_comparator_list[i].fpcr_address = FP_COMP0 + 4 * i; + } + LOG_DEBUG("FPB fpcr 0x%" PRIx32 ", numcode %i, numlit %i", fpcr, cortex_m3->fp_num_code, cortex_m3->fp_num_lit); + + /* Setup DWT */ + cortex_m3_dwt_setup(cortex_m3, target); + + /* These hardware breakpoints only work for code in flash! */ + LOG_INFO("%s: hardware has %d breakpoints, %d watchpoints", + target_name(target), + cortex_m3->fp_num_code, + cortex_m3->dwt_num_comp); + } + + return ERROR_OK; +} + +static int cortex_m3_dcc_read(struct adiv5_dap *swjdp, uint8_t *value, uint8_t *ctrl) +{ + uint16_t dcrdr; + int retval; + + mem_ap_read_buf_u16(swjdp, (uint8_t*)&dcrdr, 1, DCB_DCRDR); + *ctrl = (uint8_t)dcrdr; + *value = (uint8_t)(dcrdr >> 8); + + LOG_DEBUG("data 0x%x ctrl 0x%x", *value, *ctrl); + + /* write ack back to software dcc register + * signify we have read data */ + if (dcrdr & (1 << 0)) + { + dcrdr = 0; + retval = mem_ap_write_buf_u16(swjdp, (uint8_t*)&dcrdr, 1, DCB_DCRDR); + if (retval != ERROR_OK) + return retval; + } + + return ERROR_OK; +} + +static int cortex_m3_target_request_data(struct target *target, + uint32_t size, uint8_t *buffer) +{ + struct armv7m_common *armv7m = target_to_armv7m(target); + struct adiv5_dap *swjdp = &armv7m->dap; + uint8_t data; + uint8_t ctrl; + uint32_t i; + + for (i = 0; i < (size * 4); i++) + { + cortex_m3_dcc_read(swjdp, &data, &ctrl); + buffer[i] = data; + } + + return ERROR_OK; +} + +static int cortex_m3_handle_target_request(void *priv) +{ + struct target *target = priv; + if (!target_was_examined(target)) + return ERROR_OK; + struct armv7m_common *armv7m = target_to_armv7m(target); + struct adiv5_dap *swjdp = &armv7m->dap; + + if (!target->dbg_msg_enabled) + return ERROR_OK; + + if (target->state == TARGET_RUNNING) + { + uint8_t data; + uint8_t ctrl; + + cortex_m3_dcc_read(swjdp, &data, &ctrl); + + /* check if we have data */ + if (ctrl & (1 << 0)) + { + uint32_t request; + + /* we assume target is quick enough */ + request = data; + cortex_m3_dcc_read(swjdp, &data, &ctrl); + request |= (data << 8); + cortex_m3_dcc_read(swjdp, &data, &ctrl); + request |= (data << 16); + cortex_m3_dcc_read(swjdp, &data, &ctrl); + request |= (data << 24); + target_request(target, request); + } + } + + return ERROR_OK; +} + +static int cortex_m3_init_arch_info(struct target *target, + struct cortex_m3_common *cortex_m3, struct jtag_tap *tap) +{ + int retval; + struct armv7m_common *armv7m = &cortex_m3->armv7m; + + armv7m_init_arch_info(target, armv7m); + + /* prepare JTAG information for the new target */ + cortex_m3->jtag_info.tap = tap; + cortex_m3->jtag_info.scann_size = 4; + + /* default reset mode is to use srst if fitted + * if not it will use CORTEX_M3_RESET_VECTRESET */ + cortex_m3->soft_reset_config = CORTEX_M3_RESET_VECTRESET; + + armv7m->arm.dap = &armv7m->dap; + + /* Leave (only) generic DAP stuff for debugport_init(); */ + armv7m->dap.jtag_info = &cortex_m3->jtag_info; + armv7m->dap.memaccess_tck = 8; + /* Cortex-M3 has 4096 bytes autoincrement range */ + armv7m->dap.tar_autoincr_block = (1 << 12); + + /* register arch-specific functions */ + armv7m->examine_debug_reason = cortex_m3_examine_debug_reason; + + armv7m->post_debug_entry = NULL; + + armv7m->pre_restore_context = NULL; + + armv7m->load_core_reg_u32 = cortex_m3_load_core_reg_u32; + armv7m->store_core_reg_u32 = cortex_m3_store_core_reg_u32; + + target_register_timer_callback(cortex_m3_handle_target_request, 1, 1, target); + + if ((retval = arm_jtag_setup_connection(&cortex_m3->jtag_info)) != ERROR_OK) + { + return retval; + } + + return ERROR_OK; +} + +static int cortex_m3_target_create(struct target *target, Jim_Interp *interp) +{ + struct cortex_m3_common *cortex_m3 = calloc(1,sizeof(struct cortex_m3_common)); + + cortex_m3->common_magic = CORTEX_M3_COMMON_MAGIC; + cortex_m3_init_arch_info(target, cortex_m3, target->tap); + + return ERROR_OK; +} + +/*--------------------------------------------------------------------------*/ + +static int cortex_m3_verify_pointer(struct command_context *cmd_ctx, + struct cortex_m3_common *cm3) +{ + if (cm3->common_magic != CORTEX_M3_COMMON_MAGIC) { + command_print(cmd_ctx, "target is not a Cortex-M3"); + return ERROR_TARGET_INVALID; + } + return ERROR_OK; +} + +/* + * Only stuff below this line should need to verify that its target + * is a Cortex-M3. Everything else should have indirected through the + * cortexm3_target structure, which is only used with CM3 targets. + */ + +static const struct { + char name[10]; + unsigned mask; +} vec_ids[] = { + { "hard_err", VC_HARDERR, }, + { "int_err", VC_INTERR, }, + { "bus_err", VC_BUSERR, }, + { "state_err", VC_STATERR, }, + { "chk_err", VC_CHKERR, }, + { "nocp_err", VC_NOCPERR, }, + { "mm_err", VC_MMERR, }, + { "reset", VC_CORERESET, }, +}; + +COMMAND_HANDLER(handle_cortex_m3_vector_catch_command) +{ + struct target *target = get_current_target(CMD_CTX); + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + struct armv7m_common *armv7m = &cortex_m3->armv7m; + struct adiv5_dap *swjdp = &armv7m->dap; + uint32_t demcr = 0; + int retval; + + retval = cortex_m3_verify_pointer(CMD_CTX, cortex_m3); + if (retval != ERROR_OK) + return retval; + + retval = mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &demcr); + if (retval != ERROR_OK) + return retval; + + if (CMD_ARGC > 0) { + unsigned catch = 0; + + if (CMD_ARGC == 1) { + if (strcmp(CMD_ARGV[0], "all") == 0) { + catch = VC_HARDERR | VC_INTERR | VC_BUSERR + | VC_STATERR | VC_CHKERR | VC_NOCPERR + | VC_MMERR | VC_CORERESET; + goto write; + } else if (strcmp(CMD_ARGV[0], "none") == 0) { + goto write; + } + } + while (CMD_ARGC-- > 0) { + unsigned i; + for (i = 0; i < ARRAY_SIZE(vec_ids); i++) { + if (strcmp(CMD_ARGV[CMD_ARGC], vec_ids[i].name) != 0) + continue; + catch |= vec_ids[i].mask; + break; + } + if (i == ARRAY_SIZE(vec_ids)) { + LOG_ERROR("No CM3 vector '%s'", CMD_ARGV[CMD_ARGC]); + return ERROR_INVALID_ARGUMENTS; + } + } +write: + /* For now, armv7m->demcr only stores vector catch flags. */ + armv7m->demcr = catch; + + demcr &= ~0xffff; + demcr |= catch; + + /* write, but don't assume it stuck (why not??) */ + retval = mem_ap_write_u32(swjdp, DCB_DEMCR, demcr); + if (retval != ERROR_OK) + return retval; + retval = mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &demcr); + if (retval != ERROR_OK) + return retval; + + /* FIXME be sure to clear DEMCR on clean server shutdown. + * Otherwise the vector catch hardware could fire when there's + * no debugger hooked up, causing much confusion... + */ + } + + for (unsigned i = 0; i < ARRAY_SIZE(vec_ids); i++) + { + command_print(CMD_CTX, "%9s: %s", vec_ids[i].name, + (demcr & vec_ids[i].mask) ? "catch" : "ignore"); + } + + return ERROR_OK; +} + +COMMAND_HANDLER(handle_cortex_m3_mask_interrupts_command) +{ + struct target *target = get_current_target(CMD_CTX); + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + int retval; + + static const Jim_Nvp nvp_maskisr_modes[] = { + { .name = "auto", .value = CORTEX_M3_ISRMASK_AUTO }, + { .name = "off" , .value = CORTEX_M3_ISRMASK_OFF }, + { .name = "on" , .value = CORTEX_M3_ISRMASK_ON }, + { .name = NULL , .value = -1 }, + }; + const Jim_Nvp *n; + + + retval = cortex_m3_verify_pointer(CMD_CTX, cortex_m3); + if (retval != ERROR_OK) + return retval; + + if (target->state != TARGET_HALTED) + { + command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME); + return ERROR_OK; + } + + if (CMD_ARGC > 0) + { + n = Jim_Nvp_name2value_simple(nvp_maskisr_modes, CMD_ARGV[0]); + if (n->name == NULL) + { + return ERROR_COMMAND_SYNTAX_ERROR; + } + cortex_m3->isrmasking_mode = n->value; + + + if(cortex_m3->isrmasking_mode == CORTEX_M3_ISRMASK_ON) + { + cortex_m3_write_debug_halt_mask(target, C_HALT | C_MASKINTS, 0); + } + else + { + cortex_m3_write_debug_halt_mask(target, C_HALT, C_MASKINTS); + } + } + + n = Jim_Nvp_value2name_simple(nvp_maskisr_modes, cortex_m3->isrmasking_mode); + command_print(CMD_CTX, "cortex_m3 interrupt mask %s", n->name); + + return ERROR_OK; +} + +COMMAND_HANDLER(handle_cortex_m3_reset_config_command) +{ + struct target *target = get_current_target(CMD_CTX); + struct cortex_m3_common *cortex_m3 = target_to_cm3(target); + int retval; + char *reset_config; + + retval = cortex_m3_verify_pointer(CMD_CTX, cortex_m3); + if (retval != ERROR_OK) + return retval; + + if (CMD_ARGC > 0) + { + if (strcmp(*CMD_ARGV, "sysresetreq") == 0) + cortex_m3->soft_reset_config = CORTEX_M3_RESET_SYSRESETREQ; + else if (strcmp(*CMD_ARGV, "vectreset") == 0) + cortex_m3->soft_reset_config = CORTEX_M3_RESET_VECTRESET; + } + + switch (cortex_m3->soft_reset_config) + { + case CORTEX_M3_RESET_SYSRESETREQ: + reset_config = "sysresetreq"; + break; + + case CORTEX_M3_RESET_VECTRESET: + reset_config = "vectreset"; + break; + + default: + reset_config = "unknown"; + break; + } + + command_print(CMD_CTX, "cortex_m3 reset_config %s", reset_config); + + return ERROR_OK; +} + +static const struct command_registration cortex_m3_exec_command_handlers[] = { + { + .name = "maskisr", + .handler = handle_cortex_m3_mask_interrupts_command, + .mode = COMMAND_EXEC, + .help = "mask cortex_m3 interrupts", + .usage = "['auto'|'on'|'off']", + }, + { + .name = "vector_catch", + .handler = handle_cortex_m3_vector_catch_command, + .mode = COMMAND_EXEC, + .help = "configure hardware vectors to trigger debug entry", + .usage = "['all'|'none'|('bus_err'|'chk_err'|...)*]", + }, + { + .name = "reset_config", + .handler = handle_cortex_m3_reset_config_command, + .mode = COMMAND_ANY, + .help = "configure software reset handling", + .usage = "['srst'|'sysresetreq'|'vectreset']", + }, + COMMAND_REGISTRATION_DONE +}; +static const struct command_registration cortex_m3_command_handlers[] = { + { + .chain = armv7m_command_handlers, + }, + { + .name = "cortex_m3", + .mode = COMMAND_EXEC, + .help = "Cortex-M3 command group", + .chain = cortex_m3_exec_command_handlers, + }, + COMMAND_REGISTRATION_DONE +}; + +struct target_type cortexm3_target = +{ + .name = "cortex_m3", + + .poll = cortex_m3_poll, + .arch_state = armv7m_arch_state, + + .target_request_data = cortex_m3_target_request_data, + + .halt = cortex_m3_halt, + .resume = cortex_m3_resume, + .step = cortex_m3_step, + + .assert_reset = cortex_m3_assert_reset, + .deassert_reset = cortex_m3_deassert_reset, + .soft_reset_halt = cortex_m3_soft_reset_halt, + + .get_gdb_reg_list = armv7m_get_gdb_reg_list, + + .read_memory = cortex_m3_read_memory, + .write_memory = cortex_m3_write_memory, + .bulk_write_memory = cortex_m3_bulk_write_memory, + .checksum_memory = armv7m_checksum_memory, + .blank_check_memory = armv7m_blank_check_memory, + + .run_algorithm = armv7m_run_algorithm, + .start_algorithm = armv7m_start_algorithm, + .wait_algorithm = armv7m_wait_algorithm, + + .add_breakpoint = cortex_m3_add_breakpoint, + .remove_breakpoint = cortex_m3_remove_breakpoint, + .add_watchpoint = cortex_m3_add_watchpoint, + .remove_watchpoint = cortex_m3_remove_watchpoint, + + .commands = cortex_m3_command_handlers, + .target_create = cortex_m3_target_create, + .init_target = cortex_m3_init_target, + .examine = cortex_m3_examine, +}; diff --git a/src/target/cortex_m.h b/src/target/cortex_m.h new file mode 100644 index 000000000..e16aa89fe --- /dev/null +++ b/src/target/cortex_m.h @@ -0,0 +1,188 @@ +/*************************************************************************** + * Copyright (C) 2005 by Dominic Rath * + * Dominic.Rath@gmx.de * + * * + * Copyright (C) 2006 by Magnus Lundin * + * lundin@mlu.mine.nu * + * * + * Copyright (C) 2008 by Spencer Oliver * + * spen@spen-soft.co.uk * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ +#ifndef CORTEX_M3_H +#define CORTEX_M3_H + +#include "armv7m.h" + + +#define CORTEX_M3_COMMON_MAGIC 0x1A451A45 + +#define SYSTEM_CONTROL_BASE 0x400FE000 + +#define CPUID 0xE000ED00 +/* Debug Control Block */ +#define DCB_DHCSR 0xE000EDF0 +#define DCB_DCRSR 0xE000EDF4 +#define DCB_DCRDR 0xE000EDF8 +#define DCB_DEMCR 0xE000EDFC + +#define DCRSR_WnR (1 << 16) + +#define DWT_CTRL 0xE0001000 +#define DWT_CYCCNT 0xE0001004 +#define DWT_COMP0 0xE0001020 +#define DWT_MASK0 0xE0001024 +#define DWT_FUNCTION0 0xE0001028 + +#define FP_CTRL 0xE0002000 +#define FP_REMAP 0xE0002004 +#define FP_COMP0 0xE0002008 +#define FP_COMP1 0xE000200C +#define FP_COMP2 0xE0002010 +#define FP_COMP3 0xE0002014 +#define FP_COMP4 0xE0002018 +#define FP_COMP5 0xE000201C +#define FP_COMP6 0xE0002020 +#define FP_COMP7 0xE0002024 + +/* DCB_DHCSR bit and field definitions */ +#define DBGKEY (0xA05F << 16) +#define C_DEBUGEN (1 << 0) +#define C_HALT (1 << 1) +#define C_STEP (1 << 2) +#define C_MASKINTS (1 << 3) +#define S_REGRDY (1 << 16) +#define S_HALT (1 << 17) +#define S_SLEEP (1 << 18) +#define S_LOCKUP (1 << 19) +#define S_RETIRE_ST (1 << 24) +#define S_RESET_ST (1 << 25) + +/* DCB_DEMCR bit and field definitions */ +#define TRCENA (1 << 24) +#define VC_HARDERR (1 << 10) +#define VC_INTERR (1 << 9) +#define VC_BUSERR (1 << 8) +#define VC_STATERR (1 << 7) +#define VC_CHKERR (1 << 6) +#define VC_NOCPERR (1 << 5) +#define VC_MMERR (1 << 4) +#define VC_CORERESET (1 << 0) + +#define NVIC_ICTR 0xE000E004 +#define NVIC_ISE0 0xE000E100 +#define NVIC_ICSR 0xE000ED04 +#define NVIC_AIRCR 0xE000ED0C +#define NVIC_SHCSR 0xE000ED24 +#define NVIC_CFSR 0xE000ED28 +#define NVIC_MMFSRb 0xE000ED28 +#define NVIC_BFSRb 0xE000ED29 +#define NVIC_USFSRh 0xE000ED2A +#define NVIC_HFSR 0xE000ED2C +#define NVIC_DFSR 0xE000ED30 +#define NVIC_MMFAR 0xE000ED34 +#define NVIC_BFAR 0xE000ED38 + +/* NVIC_AIRCR bits */ +#define AIRCR_VECTKEY (0x5FA << 16) +#define AIRCR_SYSRESETREQ (1 << 2) +#define AIRCR_VECTCLRACTIVE (1 << 1) +#define AIRCR_VECTRESET (1 << 0) +/* NVIC_SHCSR bits */ +#define SHCSR_BUSFAULTENA (1 << 17) +/* NVIC_DFSR bits */ +#define DFSR_HALTED 1 +#define DFSR_BKPT 2 +#define DFSR_DWTTRAP 4 +#define DFSR_VCATCH 8 + +#define FPCR_CODE 0 +#define FPCR_LITERAL 1 +#define FPCR_REPLACE_REMAP (0 << 30) +#define FPCR_REPLACE_BKPT_LOW (1 << 30) +#define FPCR_REPLACE_BKPT_HIGH (2 << 30) +#define FPCR_REPLACE_BKPT_BOTH (3 << 30) + +struct cortex_m3_fp_comparator +{ + int used; + int type; + uint32_t fpcr_value; + uint32_t fpcr_address; +}; + +struct cortex_m3_dwt_comparator +{ + int used; + uint32_t comp; + uint32_t mask; + uint32_t function; + uint32_t dwt_comparator_address; +}; + +enum cortex_m3_soft_reset_config +{ + CORTEX_M3_RESET_SYSRESETREQ, + CORTEX_M3_RESET_VECTRESET, +}; + +enum cortex_m3_isrmasking_mode +{ + CORTEX_M3_ISRMASK_AUTO, + CORTEX_M3_ISRMASK_OFF, + CORTEX_M3_ISRMASK_ON, +}; + +struct cortex_m3_common +{ + int common_magic; + struct arm_jtag jtag_info; + + /* Context information */ + uint32_t dcb_dhcsr; + uint32_t nvic_dfsr; /* Debug Fault Status Register - shows reason for debug halt */ + uint32_t nvic_icsr; /* Interrupt Control State Register - shows active and pending IRQ */ + + /* Flash Patch and Breakpoint (FPB) */ + int fp_num_lit; + int fp_num_code; + int fp_code_available; + int fpb_enabled; + int auto_bp_type; + struct cortex_m3_fp_comparator *fp_comparator_list; + + /* Data Watchpoint and Trace (DWT) */ + int dwt_num_comp; + int dwt_comp_available; + struct cortex_m3_dwt_comparator *dwt_comparator_list; + struct reg_cache *dwt_cache; + + enum cortex_m3_soft_reset_config soft_reset_config; + + enum cortex_m3_isrmasking_mode isrmasking_mode; + + struct armv7m_common armv7m; +}; + +static inline struct cortex_m3_common * +target_to_cm3(struct target *target) +{ + return container_of(target->arch_info, + struct cortex_m3_common, armv7m); +} + +#endif /* CORTEX_M3_H */ diff --git a/src/target/cortex_m3.c b/src/target/cortex_m3.c deleted file mode 100644 index a2f8b78e1..000000000 --- a/src/target/cortex_m3.c +++ /dev/null @@ -1,2344 +0,0 @@ -/*************************************************************************** - * Copyright (C) 2005 by Dominic Rath * - * Dominic.Rath@gmx.de * - * * - * Copyright (C) 2006 by Magnus Lundin * - * lundin@mlu.mine.nu * - * * - * Copyright (C) 2008 by Spencer Oliver * - * spen@spen-soft.co.uk * - * * - * This program is free software; you can redistribute it and/or modify * - * it under the terms of the GNU General Public License as published by * - * the Free Software Foundation; either version 2 of the License, or * - * (at your option) any later version. * - * * - * This program is distributed in the hope that it will be useful, * - * but WITHOUT ANY WARRANTY; without even the implied warranty of * - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * - * GNU General Public License for more details. * - * * - * You should have received a copy of the GNU General Public License * - * along with this program; if not, write to the * - * Free Software Foundation, Inc., * - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * - * * - * * - * Cortex-M3(tm) TRM, ARM DDI 0337E (r1p1) and 0337G (r2p0) * - * * - ***************************************************************************/ -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "breakpoints.h" -#include "cortex_m3.h" -#include "target_request.h" -#include "target_type.h" -#include "arm_disassembler.h" -#include "register.h" -#include "arm_opcodes.h" -#include "arm_semihosting.h" -#include - -/* NOTE: most of this should work fine for the Cortex-M1 and - * Cortex-M0 cores too, although they're ARMv6-M not ARMv7-M. - * Some differences: M0/M1 doesn't have FBP remapping or the - * DWT tracing/profiling support. (So the cycle counter will - * not be usable; the other stuff isn't currently used here.) - * - * Although there are some workarounds for errata seen only in r0p0 - * silicon, such old parts are hard to find and thus not much tested - * any longer. - */ - -/** - * Returns the type of a break point required by address location - */ -#define BKPT_TYPE_BY_ADDR(addr) ((addr) < 0x20000000 ? BKPT_HARD : BKPT_SOFT) - - -/* forward declarations */ -static int cortex_m3_set_breakpoint(struct target *target, struct breakpoint *breakpoint); -static int cortex_m3_unset_breakpoint(struct target *target, struct breakpoint *breakpoint); -static void cortex_m3_enable_watchpoints(struct target *target); -static int cortex_m3_store_core_reg_u32(struct target *target, - enum armv7m_regtype type, uint32_t num, uint32_t value); - -static int cortexm3_dap_read_coreregister_u32(struct adiv5_dap *swjdp, - uint32_t *value, int regnum) -{ - int retval; - uint32_t dcrdr; - - /* because the DCB_DCRDR is used for the emulated dcc channel - * we have to save/restore the DCB_DCRDR when used */ - - retval = mem_ap_read_u32(swjdp, DCB_DCRDR, &dcrdr); - if (retval != ERROR_OK) - return retval; - - /* mem_ap_write_u32(swjdp, DCB_DCRSR, regnum); */ - retval = dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRSR & 0xFFFFFFF0); - if (retval != ERROR_OK) - return retval; - retval = dap_queue_ap_write(swjdp, AP_REG_BD0 | (DCB_DCRSR & 0xC), regnum); - if (retval != ERROR_OK) - return retval; - - /* mem_ap_read_u32(swjdp, DCB_DCRDR, value); */ - retval = dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRDR & 0xFFFFFFF0); - if (retval != ERROR_OK) - return retval; - retval = dap_queue_ap_read(swjdp, AP_REG_BD0 | (DCB_DCRDR & 0xC), value); - if (retval != ERROR_OK) - return retval; - - retval = dap_run(swjdp); - if (retval != ERROR_OK) - return retval; - - /* restore DCB_DCRDR - this needs to be in a seperate - * transaction otherwise the emulated DCC channel breaks */ - if (retval == ERROR_OK) - retval = mem_ap_write_atomic_u32(swjdp, DCB_DCRDR, dcrdr); - - return retval; -} - -static int cortexm3_dap_write_coreregister_u32(struct adiv5_dap *swjdp, - uint32_t value, int regnum) -{ - int retval; - uint32_t dcrdr; - - /* because the DCB_DCRDR is used for the emulated dcc channel - * we have to save/restore the DCB_DCRDR when used */ - - retval = mem_ap_read_u32(swjdp, DCB_DCRDR, &dcrdr); - if (retval != ERROR_OK) - return retval; - - /* mem_ap_write_u32(swjdp, DCB_DCRDR, core_regs[i]); */ - retval = dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRDR & 0xFFFFFFF0); - if (retval != ERROR_OK) - return retval; - retval = dap_queue_ap_write(swjdp, AP_REG_BD0 | (DCB_DCRDR & 0xC), value); - // XXX check retval - - /* mem_ap_write_u32(swjdp, DCB_DCRSR, i | DCRSR_WnR); */ - retval = dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRSR & 0xFFFFFFF0); - if (retval != ERROR_OK) - return retval; - retval = dap_queue_ap_write(swjdp, AP_REG_BD0 | (DCB_DCRSR & 0xC), regnum | DCRSR_WnR); - // XXX check retval - - retval = dap_run(swjdp); - - /* restore DCB_DCRDR - this needs to be in a seperate - * transaction otherwise the emulated DCC channel breaks */ - if (retval == ERROR_OK) - retval = mem_ap_write_atomic_u32(swjdp, DCB_DCRDR, dcrdr); - - return retval; -} - -static int cortex_m3_write_debug_halt_mask(struct target *target, - uint32_t mask_on, uint32_t mask_off) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; - - /* mask off status bits */ - cortex_m3->dcb_dhcsr &= ~((0xFFFF << 16) | mask_off); - /* create new register mask */ - cortex_m3->dcb_dhcsr |= DBGKEY | C_DEBUGEN | mask_on; - - return mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, cortex_m3->dcb_dhcsr); -} - -static int cortex_m3_clear_halt(struct target *target) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; - int retval; - - /* clear step if any */ - cortex_m3_write_debug_halt_mask(target, C_HALT, C_STEP); - - /* Read Debug Fault Status Register */ - retval = mem_ap_read_atomic_u32(swjdp, NVIC_DFSR, &cortex_m3->nvic_dfsr); - if (retval != ERROR_OK) - return retval; - - /* Clear Debug Fault Status */ - retval = mem_ap_write_atomic_u32(swjdp, NVIC_DFSR, cortex_m3->nvic_dfsr); - if (retval != ERROR_OK) - return retval; - LOG_DEBUG(" NVIC_DFSR 0x%" PRIx32 "", cortex_m3->nvic_dfsr); - - return ERROR_OK; -} - -static int cortex_m3_single_step_core(struct target *target) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; - uint32_t dhcsr_save; - int retval; - - /* backup dhcsr reg */ - dhcsr_save = cortex_m3->dcb_dhcsr; - - /* Mask interrupts before clearing halt, if done already. This avoids - * Erratum 377497 (fixed in r1p0) where setting MASKINTS while clearing - * HALT can put the core into an unknown state. - */ - if (!(cortex_m3->dcb_dhcsr & C_MASKINTS)) - { - retval = mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, - DBGKEY | C_MASKINTS | C_HALT | C_DEBUGEN); - if (retval != ERROR_OK) - return retval; - } - retval = mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, - DBGKEY | C_MASKINTS | C_STEP | C_DEBUGEN); - if (retval != ERROR_OK) - return retval; - LOG_DEBUG(" "); - - /* restore dhcsr reg */ - cortex_m3->dcb_dhcsr = dhcsr_save; - cortex_m3_clear_halt(target); - - return ERROR_OK; -} - -static int cortex_m3_endreset_event(struct target *target) -{ - int i; - int retval; - uint32_t dcb_demcr; - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct armv7m_common *armv7m = &cortex_m3->armv7m; - struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; - struct cortex_m3_fp_comparator *fp_list = cortex_m3->fp_comparator_list; - struct cortex_m3_dwt_comparator *dwt_list = cortex_m3->dwt_comparator_list; - - /* REVISIT The four debug monitor bits are currently ignored... */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &dcb_demcr); - if (retval != ERROR_OK) - return retval; - LOG_DEBUG("DCB_DEMCR = 0x%8.8" PRIx32 "",dcb_demcr); - - /* this register is used for emulated dcc channel */ - retval = mem_ap_write_u32(swjdp, DCB_DCRDR, 0); - if (retval != ERROR_OK) - return retval; - - /* Enable debug requests */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); - if (retval != ERROR_OK) - return retval; - if (!(cortex_m3->dcb_dhcsr & C_DEBUGEN)) - { - retval = mem_ap_write_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN); - if (retval != ERROR_OK) - return retval; - } - - /* clear any interrupt masking */ - cortex_m3_write_debug_halt_mask(target, 0, C_MASKINTS); - - /* Enable features controlled by ITM and DWT blocks, and catch only - * the vectors we were told to pay attention to. - * - * Target firmware is responsible for all fault handling policy - * choices *EXCEPT* explicitly scripted overrides like "vector_catch" - * or manual updates to the NVIC SHCSR and CCR registers. - */ - retval = mem_ap_write_u32(swjdp, DCB_DEMCR, TRCENA | armv7m->demcr); - if (retval != ERROR_OK) - return retval; - - /* Paranoia: evidently some (early?) chips don't preserve all the - * debug state (including FBP, DWT, etc) across reset... - */ - - /* Enable FPB */ - retval = target_write_u32(target, FP_CTRL, 3); - if (retval != ERROR_OK) - return retval; - - cortex_m3->fpb_enabled = 1; - - /* Restore FPB registers */ - for (i = 0; i < cortex_m3->fp_num_code + cortex_m3->fp_num_lit; i++) - { - retval = target_write_u32(target, fp_list[i].fpcr_address, fp_list[i].fpcr_value); - if (retval != ERROR_OK) - return retval; - } - - /* Restore DWT registers */ - for (i = 0; i < cortex_m3->dwt_num_comp; i++) - { - retval = target_write_u32(target, dwt_list[i].dwt_comparator_address + 0, - dwt_list[i].comp); - if (retval != ERROR_OK) - return retval; - retval = target_write_u32(target, dwt_list[i].dwt_comparator_address + 4, - dwt_list[i].mask); - if (retval != ERROR_OK) - return retval; - retval = target_write_u32(target, dwt_list[i].dwt_comparator_address + 8, - dwt_list[i].function); - if (retval != ERROR_OK) - return retval; - } - retval = dap_run(swjdp); - if (retval != ERROR_OK) - return retval; - - register_cache_invalidate(cortex_m3->armv7m.core_cache); - - /* make sure we have latest dhcsr flags */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); - - return retval; -} - -static int cortex_m3_examine_debug_reason(struct target *target) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - - /* THIS IS NOT GOOD, TODO - better logic for detection of debug state reason */ - /* only check the debug reason if we don't know it already */ - - if ((target->debug_reason != DBG_REASON_DBGRQ) - && (target->debug_reason != DBG_REASON_SINGLESTEP)) - { - if (cortex_m3->nvic_dfsr & DFSR_BKPT) - { - target->debug_reason = DBG_REASON_BREAKPOINT; - if (cortex_m3->nvic_dfsr & DFSR_DWTTRAP) - target->debug_reason = DBG_REASON_WPTANDBKPT; - } - else if (cortex_m3->nvic_dfsr & DFSR_DWTTRAP) - target->debug_reason = DBG_REASON_WATCHPOINT; - else if (cortex_m3->nvic_dfsr & DFSR_VCATCH) - target->debug_reason = DBG_REASON_BREAKPOINT; - else /* EXTERNAL, HALTED */ - target->debug_reason = DBG_REASON_UNDEFINED; - } - - return ERROR_OK; -} - -static int cortex_m3_examine_exception_reason(struct target *target) -{ - uint32_t shcsr, except_sr, cfsr = -1, except_ar = -1; - struct armv7m_common *armv7m = target_to_armv7m(target); - struct adiv5_dap *swjdp = &armv7m->dap; - int retval; - - retval = mem_ap_read_u32(swjdp, NVIC_SHCSR, &shcsr); - if (retval != ERROR_OK) - return retval; - switch (armv7m->exception_number) - { - case 2: /* NMI */ - break; - case 3: /* Hard Fault */ - retval = mem_ap_read_atomic_u32(swjdp, NVIC_HFSR, &except_sr); - if (retval != ERROR_OK) - return retval; - if (except_sr & 0x40000000) - { - retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &cfsr); - if (retval != ERROR_OK) - return retval; - } - break; - case 4: /* Memory Management */ - retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr); - if (retval != ERROR_OK) - return retval; - retval = mem_ap_read_u32(swjdp, NVIC_MMFAR, &except_ar); - if (retval != ERROR_OK) - return retval; - break; - case 5: /* Bus Fault */ - retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr); - if (retval != ERROR_OK) - return retval; - retval = mem_ap_read_u32(swjdp, NVIC_BFAR, &except_ar); - if (retval != ERROR_OK) - return retval; - break; - case 6: /* Usage Fault */ - retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr); - if (retval != ERROR_OK) - return retval; - break; - case 11: /* SVCall */ - break; - case 12: /* Debug Monitor */ - retval = mem_ap_read_u32(swjdp, NVIC_DFSR, &except_sr); - if (retval != ERROR_OK) - return retval; - break; - case 14: /* PendSV */ - break; - case 15: /* SysTick */ - break; - default: - except_sr = 0; - break; - } - retval = dap_run(swjdp); - if (retval == ERROR_OK) - LOG_DEBUG("%s SHCSR 0x%" PRIx32 ", SR 0x%" PRIx32 - ", CFSR 0x%" PRIx32 ", AR 0x%" PRIx32, - armv7m_exception_string(armv7m->exception_number), - shcsr, except_sr, cfsr, except_ar); - return retval; -} - -/* PSP is used in some thread modes */ -static const int armv7m_psp_reg_map[17] = { - ARMV7M_R0, ARMV7M_R1, ARMV7M_R2, ARMV7M_R3, - ARMV7M_R4, ARMV7M_R5, ARMV7M_R6, ARMV7M_R7, - ARMV7M_R8, ARMV7M_R9, ARMV7M_R10, ARMV7M_R11, - ARMV7M_R12, ARMV7M_PSP, ARMV7M_R14, ARMV7M_PC, - ARMV7M_xPSR, -}; - -/* MSP is used in handler and some thread modes */ -static const int armv7m_msp_reg_map[17] = { - ARMV7M_R0, ARMV7M_R1, ARMV7M_R2, ARMV7M_R3, - ARMV7M_R4, ARMV7M_R5, ARMV7M_R6, ARMV7M_R7, - ARMV7M_R8, ARMV7M_R9, ARMV7M_R10, ARMV7M_R11, - ARMV7M_R12, ARMV7M_MSP, ARMV7M_R14, ARMV7M_PC, - ARMV7M_xPSR, -}; - -static int cortex_m3_debug_entry(struct target *target) -{ - int i; - uint32_t xPSR; - int retval; - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct armv7m_common *armv7m = &cortex_m3->armv7m; - struct arm *arm = &armv7m->arm; - struct adiv5_dap *swjdp = &armv7m->dap; - struct reg *r; - - LOG_DEBUG(" "); - - cortex_m3_clear_halt(target); - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); - if (retval != ERROR_OK) - return retval; - - if ((retval = armv7m->examine_debug_reason(target)) != ERROR_OK) - return retval; - - /* Examine target state and mode */ - /* First load register acessible through core debug port*/ - int num_regs = armv7m->core_cache->num_regs; - - for (i = 0; i < num_regs; i++) - { - if (!armv7m->core_cache->reg_list[i].valid) - armv7m->read_core_reg(target, i); - } - - r = armv7m->core_cache->reg_list + ARMV7M_xPSR; - xPSR = buf_get_u32(r->value, 0, 32); - -#ifdef ARMV7_GDB_HACKS - /* FIXME this breaks on scan chains with more than one Cortex-M3. - * Instead, each CM3 should have its own dummy value... - */ - /* copy real xpsr reg for gdb, setting thumb bit */ - buf_set_u32(armv7m_gdb_dummy_cpsr_value, 0, 32, xPSR); - buf_set_u32(armv7m_gdb_dummy_cpsr_value, 5, 1, 1); - armv7m_gdb_dummy_cpsr_reg.valid = r->valid; - armv7m_gdb_dummy_cpsr_reg.dirty = r->dirty; -#endif - - /* For IT instructions xPSR must be reloaded on resume and clear on debug exec */ - if (xPSR & 0xf00) - { - r->dirty = r->valid; - cortex_m3_store_core_reg_u32(target, ARMV7M_REGISTER_CORE_GP, 16, xPSR &~ 0xff); - } - - /* Are we in an exception handler */ - if (xPSR & 0x1FF) - { - armv7m->core_mode = ARMV7M_MODE_HANDLER; - armv7m->exception_number = (xPSR & 0x1FF); - - arm->core_mode = ARM_MODE_HANDLER; - arm->map = armv7m_msp_reg_map; - } - else - { - unsigned control = buf_get_u32(armv7m->core_cache - ->reg_list[ARMV7M_CONTROL].value, 0, 2); - - /* is this thread privileged? */ - armv7m->core_mode = control & 1; - arm->core_mode = armv7m->core_mode - ? ARM_MODE_USER_THREAD - : ARM_MODE_THREAD; - - /* which stack is it using? */ - if (control & 2) - arm->map = armv7m_psp_reg_map; - else - arm->map = armv7m_msp_reg_map; - - armv7m->exception_number = 0; - } - - if (armv7m->exception_number) - { - cortex_m3_examine_exception_reason(target); - } - - LOG_DEBUG("entered debug state in core mode: %s at PC 0x%" PRIx32 ", target->state: %s", - armv7m_mode_strings[armv7m->core_mode], - *(uint32_t*)(arm->pc->value), - target_state_name(target)); - - if (armv7m->post_debug_entry) - { - retval = armv7m->post_debug_entry(target); - if (retval != ERROR_OK) - return retval; - } - - return ERROR_OK; -} - -static int cortex_m3_poll(struct target *target) -{ - int detected_failure = ERROR_OK; - int retval = ERROR_OK; - enum target_state prev_target_state = target->state; - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; - - /* Read from Debug Halting Control and Status Register */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); - if (retval != ERROR_OK) - { - target->state = TARGET_UNKNOWN; - return retval; - } - - /* Recover from lockup. See ARMv7-M architecture spec, - * section B1.5.15 "Unrecoverable exception cases". - */ - if (cortex_m3->dcb_dhcsr & S_LOCKUP) { - LOG_ERROR("%s -- clearing lockup after double fault", - target_name(target)); - cortex_m3_write_debug_halt_mask(target, C_HALT, 0); - target->debug_reason = DBG_REASON_DBGRQ; - - /* We have to execute the rest (the "finally" equivalent, but - * still throw this exception again). - */ - detected_failure = ERROR_FAIL; - - /* refresh status bits */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); - if (retval != ERROR_OK) - return retval; - } - - if (cortex_m3->dcb_dhcsr & S_RESET_ST) - { - /* check if still in reset */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); - if (retval != ERROR_OK) - return retval; - - if (cortex_m3->dcb_dhcsr & S_RESET_ST) - { - target->state = TARGET_RESET; - return ERROR_OK; - } - } - - if (target->state == TARGET_RESET) - { - /* Cannot switch context while running so endreset is - * called with target->state == TARGET_RESET - */ - LOG_DEBUG("Exit from reset with dcb_dhcsr 0x%" PRIx32, - cortex_m3->dcb_dhcsr); - cortex_m3_endreset_event(target); - target->state = TARGET_RUNNING; - prev_target_state = TARGET_RUNNING; - } - - if (cortex_m3->dcb_dhcsr & S_HALT) - { - target->state = TARGET_HALTED; - - if ((prev_target_state == TARGET_RUNNING) || (prev_target_state == TARGET_RESET)) - { - if ((retval = cortex_m3_debug_entry(target)) != ERROR_OK) - return retval; - - if (arm_semihosting(target, &retval) != 0) - return retval; - - target_call_event_callbacks(target, TARGET_EVENT_HALTED); - } - if (prev_target_state == TARGET_DEBUG_RUNNING) - { - LOG_DEBUG(" "); - if ((retval = cortex_m3_debug_entry(target)) != ERROR_OK) - return retval; - - target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED); - } - } - - /* REVISIT when S_SLEEP is set, it's in a Sleep or DeepSleep state. - * How best to model low power modes? - */ - - if (target->state == TARGET_UNKNOWN) - { - /* check if processor is retiring instructions */ - if (cortex_m3->dcb_dhcsr & S_RETIRE_ST) - { - target->state = TARGET_RUNNING; - retval = ERROR_OK; - } - } - - /* Did we detect a failure condition that we cleared? */ - if (detected_failure != ERROR_OK) - retval = detected_failure; - return retval; -} - -static int cortex_m3_halt(struct target *target) -{ - LOG_DEBUG("target->state: %s", - target_state_name(target)); - - if (target->state == TARGET_HALTED) - { - LOG_DEBUG("target was already halted"); - return ERROR_OK; - } - - if (target->state == TARGET_UNKNOWN) - { - LOG_WARNING("target was in unknown state when halt was requested"); - } - - if (target->state == TARGET_RESET) - { - if ((jtag_get_reset_config() & RESET_SRST_PULLS_TRST) && jtag_get_srst()) - { - LOG_ERROR("can't request a halt while in reset if nSRST pulls nTRST"); - return ERROR_TARGET_FAILURE; - } - else - { - /* we came here in a reset_halt or reset_init sequence - * debug entry was already prepared in cortex_m3_prepare_reset_halt() - */ - target->debug_reason = DBG_REASON_DBGRQ; - - return ERROR_OK; - } - } - - /* Write to Debug Halting Control and Status Register */ - cortex_m3_write_debug_halt_mask(target, C_HALT, 0); - - target->debug_reason = DBG_REASON_DBGRQ; - - return ERROR_OK; -} - -static int cortex_m3_soft_reset_halt(struct target *target) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; - uint32_t dcb_dhcsr = 0; - int retval, timeout = 0; - - /* Enter debug state on reset; restore DEMCR in endreset_event() */ - retval = mem_ap_write_u32(swjdp, DCB_DEMCR, - TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET); - if (retval != ERROR_OK) - return retval; - - /* Request a core-only reset */ - retval = mem_ap_write_atomic_u32(swjdp, NVIC_AIRCR, - AIRCR_VECTKEY | AIRCR_VECTRESET); - if (retval != ERROR_OK) - return retval; - target->state = TARGET_RESET; - - /* registers are now invalid */ - register_cache_invalidate(cortex_m3->armv7m.core_cache); - - while (timeout < 100) - { - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &dcb_dhcsr); - if (retval == ERROR_OK) - { - retval = mem_ap_read_atomic_u32(swjdp, NVIC_DFSR, - &cortex_m3->nvic_dfsr); - if (retval != ERROR_OK) - return retval; - if ((dcb_dhcsr & S_HALT) - && (cortex_m3->nvic_dfsr & DFSR_VCATCH)) - { - LOG_DEBUG("system reset-halted, DHCSR 0x%08x, " - "DFSR 0x%08x", - (unsigned) dcb_dhcsr, - (unsigned) cortex_m3->nvic_dfsr); - cortex_m3_poll(target); - /* FIXME restore user's vector catch config */ - return ERROR_OK; - } - else - LOG_DEBUG("waiting for system reset-halt, " - "DHCSR 0x%08x, %d ms", - (unsigned) dcb_dhcsr, timeout); - } - timeout++; - alive_sleep(1); - } - - return ERROR_OK; -} - -static void cortex_m3_enable_breakpoints(struct target *target) -{ - struct breakpoint *breakpoint = target->breakpoints; - - /* set any pending breakpoints */ - while (breakpoint) - { - if (!breakpoint->set) - cortex_m3_set_breakpoint(target, breakpoint); - breakpoint = breakpoint->next; - } -} - -static int cortex_m3_resume(struct target *target, int current, - uint32_t address, int handle_breakpoints, int debug_execution) -{ - struct armv7m_common *armv7m = target_to_armv7m(target); - struct breakpoint *breakpoint = NULL; - uint32_t resume_pc; - struct reg *r; - - if (target->state != TARGET_HALTED) - { - LOG_WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (!debug_execution) - { - target_free_all_working_areas(target); - cortex_m3_enable_breakpoints(target); - cortex_m3_enable_watchpoints(target); - } - - if (debug_execution) - { - r = armv7m->core_cache->reg_list + ARMV7M_PRIMASK; - - /* Disable interrupts */ - /* We disable interrupts in the PRIMASK register instead of - * masking with C_MASKINTS. This is probably the same issue - * as Cortex-M3 Erratum 377493 (fixed in r1p0): C_MASKINTS - * in parallel with disabled interrupts can cause local faults - * to not be taken. - * - * REVISIT this clearly breaks non-debug execution, since the - * PRIMASK register state isn't saved/restored... workaround - * by never resuming app code after debug execution. - */ - buf_set_u32(r->value, 0, 1, 1); - r->dirty = true; - r->valid = true; - - /* Make sure we are in Thumb mode */ - r = armv7m->core_cache->reg_list + ARMV7M_xPSR; - buf_set_u32(r->value, 24, 1, 1); - r->dirty = true; - r->valid = true; - } - - /* current = 1: continue on current pc, otherwise continue at
*/ - r = armv7m->arm.pc; - if (!current) - { - buf_set_u32(r->value, 0, 32, address); - r->dirty = true; - r->valid = true; - } - - /* if we halted last time due to a bkpt instruction - * then we have to manually step over it, otherwise - * the core will break again */ - - if (!breakpoint_find(target, buf_get_u32(r->value, 0, 32)) - && !debug_execution) - { - armv7m_maybe_skip_bkpt_inst(target, NULL); - } - - resume_pc = buf_get_u32(r->value, 0, 32); - - armv7m_restore_context(target); - - /* the front-end may request us not to handle breakpoints */ - if (handle_breakpoints) - { - /* Single step past breakpoint at current address */ - if ((breakpoint = breakpoint_find(target, resume_pc))) - { - LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32 " (ID: %d)", - breakpoint->address, - breakpoint->unique_id); - cortex_m3_unset_breakpoint(target, breakpoint); - cortex_m3_single_step_core(target); - cortex_m3_set_breakpoint(target, breakpoint); - } - } - - /* Restart core */ - cortex_m3_write_debug_halt_mask(target, 0, C_HALT); - - target->debug_reason = DBG_REASON_NOTHALTED; - - /* registers are now invalid */ - register_cache_invalidate(armv7m->core_cache); - - if (!debug_execution) - { - target->state = TARGET_RUNNING; - target_call_event_callbacks(target, TARGET_EVENT_RESUMED); - LOG_DEBUG("target resumed at 0x%" PRIx32 "", resume_pc); - } - else - { - target->state = TARGET_DEBUG_RUNNING; - target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED); - LOG_DEBUG("target debug resumed at 0x%" PRIx32 "", resume_pc); - } - - return ERROR_OK; -} - -/* int irqstepcount = 0; */ -static int cortex_m3_step(struct target *target, int current, - uint32_t address, int handle_breakpoints) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct armv7m_common *armv7m = &cortex_m3->armv7m; - struct adiv5_dap *swjdp = &armv7m->dap; - struct breakpoint *breakpoint = NULL; - struct reg *pc = armv7m->arm.pc; - bool bkpt_inst_found = false; - int retval; - bool isr_timed_out = false; - - if (target->state != TARGET_HALTED) - { - LOG_WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - /* current = 1: continue on current pc, otherwise continue at
*/ - if (!current) - buf_set_u32(pc->value, 0, 32, address); - - uint32_t pc_value = buf_get_u32(pc->value, 0, 32); - - /* the front-end may request us not to handle breakpoints */ - if (handle_breakpoints) { - breakpoint = breakpoint_find(target, pc_value); - if (breakpoint) - cortex_m3_unset_breakpoint(target, breakpoint); - } - - armv7m_maybe_skip_bkpt_inst(target, &bkpt_inst_found); - - target->debug_reason = DBG_REASON_SINGLESTEP; - - armv7m_restore_context(target); - - target_call_event_callbacks(target, TARGET_EVENT_RESUMED); - - /* if no bkpt instruction is found at pc then we can perform - * a normal step, otherwise we have to manually step over the bkpt - * instruction - as such simulate a step */ - if (bkpt_inst_found == false) - { - /* Automatic ISR masking mode off: Just step over the next instruction */ - if ((cortex_m3->isrmasking_mode != CORTEX_M3_ISRMASK_AUTO)) - { - cortex_m3_write_debug_halt_mask(target, C_STEP, C_HALT); - } - else - { - /* Process interrupts during stepping in a way they don't interfere - * debugging. - * - * Principle: - * - * Set a temporary break point at the current pc and let the core run - * with interrupts enabled. Pending interrupts get served and we run - * into the breakpoint again afterwards. Then we step over the next - * instruction with interrupts disabled. - * - * If the pending interrupts don't complete within time, we leave the - * core running. This may happen if the interrupts trigger faster - * than the core can process them or the handler doesn't return. - * - * If no more breakpoints are available we simply do a step with - * interrupts enabled. - * - */ - - /* Set a temporary break point */ - retval = breakpoint_add(target, pc_value , 2, BKPT_TYPE_BY_ADDR(pc_value)); - bool tmp_bp_set = (retval == ERROR_OK); - - /* No more breakpoints left, just do a step */ - if (!tmp_bp_set) - { - cortex_m3_write_debug_halt_mask(target, C_STEP, C_HALT); - } - else - { - /* Start the core */ - LOG_DEBUG("Starting core to serve pending interrupts"); - int64_t t_start = timeval_ms(); - cortex_m3_write_debug_halt_mask(target, 0, C_HALT | C_STEP); - - /* Wait for pending handlers to complete or timeout */ - do { - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); - if (retval != ERROR_OK) - { - target->state = TARGET_UNKNOWN; - return retval; - } - isr_timed_out = ((timeval_ms() - t_start) > 500); - } while (!((cortex_m3->dcb_dhcsr & S_HALT) || isr_timed_out)); - - /* Remove the temporary breakpoint */ - breakpoint_remove(target, pc_value); - - if (isr_timed_out) - { - LOG_DEBUG("Interrupt handlers didn't complete within time, " - "leaving target running"); - } - else - { - /* Step over next instruction with interrupts disabled */ - cortex_m3_write_debug_halt_mask(target, C_HALT | C_MASKINTS, 0); - cortex_m3_write_debug_halt_mask(target, C_STEP, C_HALT); - /* Re-enable interrupts */ - cortex_m3_write_debug_halt_mask(target, C_HALT, C_MASKINTS); - } - } - } - } - - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); - if (retval != ERROR_OK) - return retval; - - /* registers are now invalid */ - register_cache_invalidate(cortex_m3->armv7m.core_cache); - - if (breakpoint) - cortex_m3_set_breakpoint(target, breakpoint); - - if (isr_timed_out) { - /* Leave the core running. The user has to stop execution manually. */ - target->debug_reason = DBG_REASON_NOTHALTED; - target->state = TARGET_RUNNING; - return ERROR_OK; - } - - LOG_DEBUG("target stepped dcb_dhcsr = 0x%" PRIx32 - " nvic_icsr = 0x%" PRIx32, - cortex_m3->dcb_dhcsr, cortex_m3->nvic_icsr); - - retval = cortex_m3_debug_entry(target); - if (retval != ERROR_OK) - return retval; - target_call_event_callbacks(target, TARGET_EVENT_HALTED); - - LOG_DEBUG("target stepped dcb_dhcsr = 0x%" PRIx32 - " nvic_icsr = 0x%" PRIx32, - cortex_m3->dcb_dhcsr, cortex_m3->nvic_icsr); - - return ERROR_OK; -} - -static int cortex_m3_assert_reset(struct target *target) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; - enum cortex_m3_soft_reset_config reset_config = cortex_m3->soft_reset_config; - - LOG_DEBUG("target->state: %s", - target_state_name(target)); - - enum reset_types jtag_reset_config = jtag_get_reset_config(); - - if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT)) { - /* allow scripts to override the reset event */ - - target_handle_event(target, TARGET_EVENT_RESET_ASSERT); - register_cache_invalidate(cortex_m3->armv7m.core_cache); - target->state = TARGET_RESET; - - return ERROR_OK; - } - - /* Enable debug requests */ - int retval; - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); - if (retval != ERROR_OK) - return retval; - if (!(cortex_m3->dcb_dhcsr & C_DEBUGEN)) - { - retval = mem_ap_write_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN); - if (retval != ERROR_OK) - return retval; - } - - retval = mem_ap_write_u32(swjdp, DCB_DCRDR, 0); - if (retval != ERROR_OK) - return retval; - - if (!target->reset_halt) - { - /* Set/Clear C_MASKINTS in a separate operation */ - if (cortex_m3->dcb_dhcsr & C_MASKINTS) - { - retval = mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, - DBGKEY | C_DEBUGEN | C_HALT); - if (retval != ERROR_OK) - return retval; - } - - /* clear any debug flags before resuming */ - cortex_m3_clear_halt(target); - - /* clear C_HALT in dhcsr reg */ - cortex_m3_write_debug_halt_mask(target, 0, C_HALT); - } - else - { - /* Halt in debug on reset; endreset_event() restores DEMCR. - * - * REVISIT catching BUSERR presumably helps to defend against - * bad vector table entries. Should this include MMERR or - * other flags too? - */ - retval = mem_ap_write_atomic_u32(swjdp, DCB_DEMCR, - TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET); - if (retval != ERROR_OK) - return retval; - } - - if (jtag_reset_config & RESET_HAS_SRST) - { - /* default to asserting srst */ - if (jtag_reset_config & RESET_SRST_PULLS_TRST) - { - jtag_add_reset(1, 1); - } - else - { - jtag_add_reset(0, 1); - } - } - else - { - /* Use a standard Cortex-M3 software reset mechanism. - * We default to using VECRESET as it is supported on all current cores. - * This has the disadvantage of not resetting the peripherals, so a - * reset-init event handler is needed to perform any peripheral resets. - */ - retval = mem_ap_write_atomic_u32(swjdp, NVIC_AIRCR, - AIRCR_VECTKEY | ((reset_config == CORTEX_M3_RESET_SYSRESETREQ) - ? AIRCR_SYSRESETREQ : AIRCR_VECTRESET)); - if (retval != ERROR_OK) - return retval; - - LOG_DEBUG("Using Cortex-M3 %s", (reset_config == CORTEX_M3_RESET_SYSRESETREQ) - ? "SYSRESETREQ" : "VECTRESET"); - - if (reset_config == CORTEX_M3_RESET_VECTRESET) { - LOG_WARNING("Only resetting the Cortex-M3 core, use a reset-init event " - "handler to reset any peripherals"); - } - - { - /* I do not know why this is necessary, but it - * fixes strange effects (step/resume cause NMI - * after reset) on LM3S6918 -- Michael Schwingen - */ - uint32_t tmp; - retval = mem_ap_read_atomic_u32(swjdp, NVIC_AIRCR, &tmp); - if (retval != ERROR_OK) - return retval; - } - } - - target->state = TARGET_RESET; - jtag_add_sleep(50000); - - register_cache_invalidate(cortex_m3->armv7m.core_cache); - - if (target->reset_halt) - { - if ((retval = target_halt(target)) != ERROR_OK) - return retval; - } - - return ERROR_OK; -} - -static int cortex_m3_deassert_reset(struct target *target) -{ - LOG_DEBUG("target->state: %s", - target_state_name(target)); - - /* deassert reset lines */ - jtag_add_reset(0, 0); - - return ERROR_OK; -} - -static int -cortex_m3_set_breakpoint(struct target *target, struct breakpoint *breakpoint) -{ - int retval; - int fp_num = 0; - uint32_t hilo; - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct cortex_m3_fp_comparator *comparator_list = cortex_m3->fp_comparator_list; - - if (breakpoint->set) - { - LOG_WARNING("breakpoint (BPID: %d) already set", breakpoint->unique_id); - return ERROR_OK; - } - - if (cortex_m3->auto_bp_type) - { - breakpoint->type = BKPT_TYPE_BY_ADDR(breakpoint->address); - } - - if (breakpoint->type == BKPT_HARD) - { - while (comparator_list[fp_num].used && (fp_num < cortex_m3->fp_num_code)) - fp_num++; - if (fp_num >= cortex_m3->fp_num_code) - { - LOG_ERROR("Can not find free FPB Comparator!"); - return ERROR_FAIL; - } - breakpoint->set = fp_num + 1; - hilo = (breakpoint->address & 0x2) ? FPCR_REPLACE_BKPT_HIGH : FPCR_REPLACE_BKPT_LOW; - comparator_list[fp_num].used = 1; - comparator_list[fp_num].fpcr_value = (breakpoint->address & 0x1FFFFFFC) | hilo | 1; - target_write_u32(target, comparator_list[fp_num].fpcr_address, comparator_list[fp_num].fpcr_value); - LOG_DEBUG("fpc_num %i fpcr_value 0x%" PRIx32 "", fp_num, comparator_list[fp_num].fpcr_value); - if (!cortex_m3->fpb_enabled) - { - LOG_DEBUG("FPB wasn't enabled, do it now"); - target_write_u32(target, FP_CTRL, 3); - } - } - else if (breakpoint->type == BKPT_SOFT) - { - uint8_t code[4]; - - /* NOTE: on ARMv6-M and ARMv7-M, BKPT(0xab) is used for - * semihosting; don't use that. Otherwise the BKPT - * parameter is arbitrary. - */ - buf_set_u32(code, 0, 32, ARMV5_T_BKPT(0x11)); - retval = target_read_memory(target, - breakpoint->address & 0xFFFFFFFE, - breakpoint->length, 1, - breakpoint->orig_instr); - if (retval != ERROR_OK) - return retval; - retval = target_write_memory(target, - breakpoint->address & 0xFFFFFFFE, - breakpoint->length, 1, - code); - if (retval != ERROR_OK) - return retval; - breakpoint->set = true; - } - - LOG_DEBUG("BPID: %d, Type: %d, Address: 0x%08" PRIx32 " Length: %d (set=%d)", - breakpoint->unique_id, - (int)(breakpoint->type), - breakpoint->address, - breakpoint->length, - breakpoint->set); - - return ERROR_OK; -} - -static int -cortex_m3_unset_breakpoint(struct target *target, struct breakpoint *breakpoint) -{ - int retval; - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct cortex_m3_fp_comparator * comparator_list = cortex_m3->fp_comparator_list; - - if (!breakpoint->set) - { - LOG_WARNING("breakpoint not set"); - return ERROR_OK; - } - - LOG_DEBUG("BPID: %d, Type: %d, Address: 0x%08" PRIx32 " Length: %d (set=%d)", - breakpoint->unique_id, - (int)(breakpoint->type), - breakpoint->address, - breakpoint->length, - breakpoint->set); - - if (breakpoint->type == BKPT_HARD) - { - int fp_num = breakpoint->set - 1; - if ((fp_num < 0) || (fp_num >= cortex_m3->fp_num_code)) - { - LOG_DEBUG("Invalid FP Comparator number in breakpoint"); - return ERROR_OK; - } - comparator_list[fp_num].used = 0; - comparator_list[fp_num].fpcr_value = 0; - target_write_u32(target, comparator_list[fp_num].fpcr_address, comparator_list[fp_num].fpcr_value); - } - else - { - /* restore original instruction (kept in target endianness) */ - if (breakpoint->length == 4) - { - if ((retval = target_write_memory(target, breakpoint->address & 0xFFFFFFFE, 4, 1, breakpoint->orig_instr)) != ERROR_OK) - { - return retval; - } - } - else - { - if ((retval = target_write_memory(target, breakpoint->address & 0xFFFFFFFE, 2, 1, breakpoint->orig_instr)) != ERROR_OK) - { - return retval; - } - } - } - breakpoint->set = false; - - return ERROR_OK; -} - -static int -cortex_m3_add_breakpoint(struct target *target, struct breakpoint *breakpoint) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - - if (cortex_m3->auto_bp_type) - { - breakpoint->type = BKPT_TYPE_BY_ADDR(breakpoint->address); -#ifdef ARMV7_GDB_HACKS - if (breakpoint->length != 2) { - /* XXX Hack: Replace all breakpoints with length != 2 with - * a hardware breakpoint. */ - breakpoint->type = BKPT_HARD; - breakpoint->length = 2; - } -#endif - } - - if(breakpoint->type != BKPT_TYPE_BY_ADDR(breakpoint->address)) { - if (breakpoint->type == BKPT_HARD) - { - LOG_INFO("flash patch comparator requested outside code memory region"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - - if (breakpoint->type == BKPT_SOFT) - { - LOG_INFO("soft breakpoint requested in code (flash) memory region"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - } - - if ((breakpoint->type == BKPT_HARD) && (cortex_m3->fp_code_available < 1)) - { - LOG_INFO("no flash patch comparator unit available for hardware breakpoint"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - - if ((breakpoint->length != 2)) - { - LOG_INFO("only breakpoints of two bytes length supported"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - - if (breakpoint->type == BKPT_HARD) - cortex_m3->fp_code_available--; - - return cortex_m3_set_breakpoint(target, breakpoint); -} - -static int -cortex_m3_remove_breakpoint(struct target *target, struct breakpoint *breakpoint) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - - /* REVISIT why check? FBP can be updated with core running ... */ - if (target->state != TARGET_HALTED) - { - LOG_WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (cortex_m3->auto_bp_type) - { - breakpoint->type = BKPT_TYPE_BY_ADDR(breakpoint->address); - } - - if (breakpoint->set) - { - cortex_m3_unset_breakpoint(target, breakpoint); - } - - if (breakpoint->type == BKPT_HARD) - cortex_m3->fp_code_available++; - - return ERROR_OK; -} - -static int -cortex_m3_set_watchpoint(struct target *target, struct watchpoint *watchpoint) -{ - int dwt_num = 0; - uint32_t mask, temp; - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - - /* watchpoint params were validated earlier */ - mask = 0; - temp = watchpoint->length; - while (temp) { - temp >>= 1; - mask++; - } - mask--; - - /* REVISIT Don't fully trust these "not used" records ... users - * may set up breakpoints by hand, e.g. dual-address data value - * watchpoint using comparator #1; comparator #0 matching cycle - * count; send data trace info through ITM and TPIU; etc - */ - struct cortex_m3_dwt_comparator *comparator; - - for (comparator = cortex_m3->dwt_comparator_list; - comparator->used && dwt_num < cortex_m3->dwt_num_comp; - comparator++, dwt_num++) - continue; - if (dwt_num >= cortex_m3->dwt_num_comp) - { - LOG_ERROR("Can not find free DWT Comparator"); - return ERROR_FAIL; - } - comparator->used = 1; - watchpoint->set = dwt_num + 1; - - comparator->comp = watchpoint->address; - target_write_u32(target, comparator->dwt_comparator_address + 0, - comparator->comp); - - comparator->mask = mask; - target_write_u32(target, comparator->dwt_comparator_address + 4, - comparator->mask); - - switch (watchpoint->rw) { - case WPT_READ: - comparator->function = 5; - break; - case WPT_WRITE: - comparator->function = 6; - break; - case WPT_ACCESS: - comparator->function = 7; - break; - } - target_write_u32(target, comparator->dwt_comparator_address + 8, - comparator->function); - - LOG_DEBUG("Watchpoint (ID %d) DWT%d 0x%08x 0x%x 0x%05x", - watchpoint->unique_id, dwt_num, - (unsigned) comparator->comp, - (unsigned) comparator->mask, - (unsigned) comparator->function); - return ERROR_OK; -} - -static int -cortex_m3_unset_watchpoint(struct target *target, struct watchpoint *watchpoint) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct cortex_m3_dwt_comparator *comparator; - int dwt_num; - - if (!watchpoint->set) - { - LOG_WARNING("watchpoint (wpid: %d) not set", - watchpoint->unique_id); - return ERROR_OK; - } - - dwt_num = watchpoint->set - 1; - - LOG_DEBUG("Watchpoint (ID %d) DWT%d address: 0x%08x clear", - watchpoint->unique_id, dwt_num, - (unsigned) watchpoint->address); - - if ((dwt_num < 0) || (dwt_num >= cortex_m3->dwt_num_comp)) - { - LOG_DEBUG("Invalid DWT Comparator number in watchpoint"); - return ERROR_OK; - } - - comparator = cortex_m3->dwt_comparator_list + dwt_num; - comparator->used = 0; - comparator->function = 0; - target_write_u32(target, comparator->dwt_comparator_address + 8, - comparator->function); - - watchpoint->set = false; - - return ERROR_OK; -} - -static int -cortex_m3_add_watchpoint(struct target *target, struct watchpoint *watchpoint) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - - if (cortex_m3->dwt_comp_available < 1) - { - LOG_DEBUG("no comparators?"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - - /* hardware doesn't support data value masking */ - if (watchpoint->mask != ~(uint32_t)0) { - LOG_DEBUG("watchpoint value masks not supported"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - - /* hardware allows address masks of up to 32K */ - unsigned mask; - - for (mask = 0; mask < 16; mask++) { - if ((1u << mask) == watchpoint->length) - break; - } - if (mask == 16) { - LOG_DEBUG("unsupported watchpoint length"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - if (watchpoint->address & ((1 << mask) - 1)) { - LOG_DEBUG("watchpoint address is unaligned"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - - /* Caller doesn't seem to be able to describe watching for data - * values of zero; that flags "no value". - * - * REVISIT This DWT may well be able to watch for specific data - * values. Requires comparator #1 to set DATAVMATCH and match - * the data, and another comparator (DATAVADDR0) matching addr. - */ - if (watchpoint->value) { - LOG_DEBUG("data value watchpoint not YET supported"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - - cortex_m3->dwt_comp_available--; - LOG_DEBUG("dwt_comp_available: %d", cortex_m3->dwt_comp_available); - - return ERROR_OK; -} - -static int -cortex_m3_remove_watchpoint(struct target *target, struct watchpoint *watchpoint) -{ - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - - /* REVISIT why check? DWT can be updated with core running ... */ - if (target->state != TARGET_HALTED) - { - LOG_WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (watchpoint->set) - { - cortex_m3_unset_watchpoint(target, watchpoint); - } - - cortex_m3->dwt_comp_available++; - LOG_DEBUG("dwt_comp_available: %d", cortex_m3->dwt_comp_available); - - return ERROR_OK; -} - -static void cortex_m3_enable_watchpoints(struct target *target) -{ - struct watchpoint *watchpoint = target->watchpoints; - - /* set any pending watchpoints */ - while (watchpoint) - { - if (!watchpoint->set) - cortex_m3_set_watchpoint(target, watchpoint); - watchpoint = watchpoint->next; - } -} - -static int cortex_m3_load_core_reg_u32(struct target *target, - enum armv7m_regtype type, uint32_t num, uint32_t * value) -{ - int retval; - struct armv7m_common *armv7m = target_to_armv7m(target); - struct adiv5_dap *swjdp = &armv7m->dap; - - /* NOTE: we "know" here that the register identifiers used - * in the v7m header match the Cortex-M3 Debug Core Register - * Selector values for R0..R15, xPSR, MSP, and PSP. - */ - switch (num) { - case 0 ... 18: - /* read a normal core register */ - retval = cortexm3_dap_read_coreregister_u32(swjdp, value, num); - - if (retval != ERROR_OK) - { - LOG_ERROR("JTAG failure %i",retval); - return ERROR_JTAG_DEVICE_ERROR; - } - LOG_DEBUG("load from core reg %i value 0x%" PRIx32 "",(int)num,*value); - break; - - case ARMV7M_PRIMASK: - case ARMV7M_BASEPRI: - case ARMV7M_FAULTMASK: - case ARMV7M_CONTROL: - /* Cortex-M3 packages these four registers as bitfields - * in one Debug Core register. So say r0 and r2 docs; - * it was removed from r1 docs, but still works. - */ - cortexm3_dap_read_coreregister_u32(swjdp, value, 20); - - switch (num) - { - case ARMV7M_PRIMASK: - *value = buf_get_u32((uint8_t*)value, 0, 1); - break; - - case ARMV7M_BASEPRI: - *value = buf_get_u32((uint8_t*)value, 8, 8); - break; - - case ARMV7M_FAULTMASK: - *value = buf_get_u32((uint8_t*)value, 16, 1); - break; - - case ARMV7M_CONTROL: - *value = buf_get_u32((uint8_t*)value, 24, 2); - break; - } - - LOG_DEBUG("load from special reg %i value 0x%" PRIx32 "", (int)num, *value); - break; - - default: - return ERROR_INVALID_ARGUMENTS; - } - - return ERROR_OK; -} - -static int cortex_m3_store_core_reg_u32(struct target *target, - enum armv7m_regtype type, uint32_t num, uint32_t value) -{ - int retval; - uint32_t reg; - struct armv7m_common *armv7m = target_to_armv7m(target); - struct adiv5_dap *swjdp = &armv7m->dap; - -#ifdef ARMV7_GDB_HACKS - /* If the LR register is being modified, make sure it will put us - * in "thumb" mode, or an INVSTATE exception will occur. This is a - * hack to deal with the fact that gdb will sometimes "forge" - * return addresses, and doesn't set the LSB correctly (i.e., when - * printing expressions containing function calls, it sets LR = 0.) - * Valid exception return codes have bit 0 set too. - */ - if (num == ARMV7M_R14) - value |= 0x01; -#endif - - /* NOTE: we "know" here that the register identifiers used - * in the v7m header match the Cortex-M3 Debug Core Register - * Selector values for R0..R15, xPSR, MSP, and PSP. - */ - switch (num) { - case 0 ... 18: - retval = cortexm3_dap_write_coreregister_u32(swjdp, value, num); - if (retval != ERROR_OK) - { - struct reg *r; - - LOG_ERROR("JTAG failure"); - r = armv7m->core_cache->reg_list + num; - r->dirty = r->valid; - return ERROR_JTAG_DEVICE_ERROR; - } - LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", (int)num, value); - break; - - case ARMV7M_PRIMASK: - case ARMV7M_BASEPRI: - case ARMV7M_FAULTMASK: - case ARMV7M_CONTROL: - /* Cortex-M3 packages these four registers as bitfields - * in one Debug Core register. So say r0 and r2 docs; - * it was removed from r1 docs, but still works. - */ - cortexm3_dap_read_coreregister_u32(swjdp, ®, 20); - - switch (num) - { - case ARMV7M_PRIMASK: - buf_set_u32((uint8_t*)®, 0, 1, value); - break; - - case ARMV7M_BASEPRI: - buf_set_u32((uint8_t*)®, 8, 8, value); - break; - - case ARMV7M_FAULTMASK: - buf_set_u32((uint8_t*)®, 16, 1, value); - break; - - case ARMV7M_CONTROL: - buf_set_u32((uint8_t*)®, 24, 2, value); - break; - } - - cortexm3_dap_write_coreregister_u32(swjdp, reg, 20); - - LOG_DEBUG("write special reg %i value 0x%" PRIx32 " ", (int)num, value); - break; - - default: - return ERROR_INVALID_ARGUMENTS; - } - - return ERROR_OK; -} - -static int cortex_m3_read_memory(struct target *target, uint32_t address, - uint32_t size, uint32_t count, uint8_t *buffer) -{ - struct armv7m_common *armv7m = target_to_armv7m(target); - struct adiv5_dap *swjdp = &armv7m->dap; - int retval = ERROR_INVALID_ARGUMENTS; - - /* cortex_m3 handles unaligned memory access */ - if (count && buffer) { - switch (size) { - case 4: - retval = mem_ap_read_buf_u32(swjdp, buffer, 4 * count, address); - break; - case 2: - retval = mem_ap_read_buf_u16(swjdp, buffer, 2 * count, address); - break; - case 1: - retval = mem_ap_read_buf_u8(swjdp, buffer, count, address); - break; - } - } - - return retval; -} - -static int cortex_m3_write_memory(struct target *target, uint32_t address, - uint32_t size, uint32_t count, const uint8_t *buffer) -{ - struct armv7m_common *armv7m = target_to_armv7m(target); - struct adiv5_dap *swjdp = &armv7m->dap; - int retval = ERROR_INVALID_ARGUMENTS; - - if (count && buffer) { - switch (size) { - case 4: - retval = mem_ap_write_buf_u32(swjdp, buffer, 4 * count, address); - break; - case 2: - retval = mem_ap_write_buf_u16(swjdp, buffer, 2 * count, address); - break; - case 1: - retval = mem_ap_write_buf_u8(swjdp, buffer, count, address); - break; - } - } - - return retval; -} - -static int cortex_m3_bulk_write_memory(struct target *target, uint32_t address, - uint32_t count, const uint8_t *buffer) -{ - return cortex_m3_write_memory(target, address, 4, count, buffer); -} - -static int cortex_m3_init_target(struct command_context *cmd_ctx, - struct target *target) -{ - armv7m_build_reg_cache(target); - return ERROR_OK; -} - -/* REVISIT cache valid/dirty bits are unmaintained. We could set "valid" - * on r/w if the core is not running, and clear on resume or reset ... or - * at least, in a post_restore_context() method. - */ - -struct dwt_reg_state { - struct target *target; - uint32_t addr; - uint32_t value; /* scratch/cache */ -}; - -static int cortex_m3_dwt_get_reg(struct reg *reg) -{ - struct dwt_reg_state *state = reg->arch_info; - - return target_read_u32(state->target, state->addr, &state->value); -} - -static int cortex_m3_dwt_set_reg(struct reg *reg, uint8_t *buf) -{ - struct dwt_reg_state *state = reg->arch_info; - - return target_write_u32(state->target, state->addr, - buf_get_u32(buf, 0, reg->size)); -} - -struct dwt_reg { - uint32_t addr; - char *name; - unsigned size; -}; - -static struct dwt_reg dwt_base_regs[] = { - { DWT_CTRL, "dwt_ctrl", 32, }, - /* NOTE that Erratum 532314 (fixed r2p0) affects CYCCNT: it wrongly - * increments while the core is asleep. - */ - { DWT_CYCCNT, "dwt_cyccnt", 32, }, - /* plus some 8 bit counters, useful for profiling with TPIU */ -}; - -static struct dwt_reg dwt_comp[] = { -#define DWT_COMPARATOR(i) \ - { DWT_COMP0 + 0x10 * (i), "dwt_" #i "_comp", 32, }, \ - { DWT_MASK0 + 0x10 * (i), "dwt_" #i "_mask", 4, }, \ - { DWT_FUNCTION0 + 0x10 * (i), "dwt_" #i "_function", 32, } - DWT_COMPARATOR(0), - DWT_COMPARATOR(1), - DWT_COMPARATOR(2), - DWT_COMPARATOR(3), -#undef DWT_COMPARATOR -}; - -static const struct reg_arch_type dwt_reg_type = { - .get = cortex_m3_dwt_get_reg, - .set = cortex_m3_dwt_set_reg, -}; - -static void -cortex_m3_dwt_addreg(struct target *t, struct reg *r, struct dwt_reg *d) -{ - struct dwt_reg_state *state; - - state = calloc(1, sizeof *state); - if (!state) - return; - state->addr = d->addr; - state->target = t; - - r->name = d->name; - r->size = d->size; - r->value = &state->value; - r->arch_info = state; - r->type = &dwt_reg_type; -} - -static void -cortex_m3_dwt_setup(struct cortex_m3_common *cm3, struct target *target) -{ - uint32_t dwtcr; - struct reg_cache *cache; - struct cortex_m3_dwt_comparator *comparator; - int reg, i; - - target_read_u32(target, DWT_CTRL, &dwtcr); - if (!dwtcr) { - LOG_DEBUG("no DWT"); - return; - } - - cm3->dwt_num_comp = (dwtcr >> 28) & 0xF; - cm3->dwt_comp_available = cm3->dwt_num_comp; - cm3->dwt_comparator_list = calloc(cm3->dwt_num_comp, - sizeof(struct cortex_m3_dwt_comparator)); - if (!cm3->dwt_comparator_list) { -fail0: - cm3->dwt_num_comp = 0; - LOG_ERROR("out of mem"); - return; - } - - cache = calloc(1, sizeof *cache); - if (!cache) { -fail1: - free(cm3->dwt_comparator_list); - goto fail0; - } - cache->name = "cortex-m3 dwt registers"; - cache->num_regs = 2 + cm3->dwt_num_comp * 3; - cache->reg_list = calloc(cache->num_regs, sizeof *cache->reg_list); - if (!cache->reg_list) { - free(cache); - goto fail1; - } - - for (reg = 0; reg < 2; reg++) - cortex_m3_dwt_addreg(target, cache->reg_list + reg, - dwt_base_regs + reg); - - comparator = cm3->dwt_comparator_list; - for (i = 0; i < cm3->dwt_num_comp; i++, comparator++) { - int j; - - comparator->dwt_comparator_address = DWT_COMP0 + 0x10 * i; - for (j = 0; j < 3; j++, reg++) - cortex_m3_dwt_addreg(target, cache->reg_list + reg, - dwt_comp + 3 * i + j); - } - - *register_get_last_cache_p(&target->reg_cache) = cache; - cm3->dwt_cache = cache; - - LOG_DEBUG("DWT dwtcr 0x%" PRIx32 ", comp %d, watch%s", - dwtcr, cm3->dwt_num_comp, - (dwtcr & (0xf << 24)) ? " only" : "/trigger"); - - /* REVISIT: if num_comp > 1, check whether comparator #1 can - * implement single-address data value watchpoints ... so we - * won't need to check it later, when asked to set one up. - */ -} - -static int cortex_m3_examine(struct target *target) -{ - int retval; - uint32_t cpuid, fpcr; - int i; - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; - - if ((retval = ahbap_debugport_init(swjdp)) != ERROR_OK) - return retval; - - if (!target_was_examined(target)) - { - target_set_examined(target); - - /* Read from Device Identification Registers */ - retval = target_read_u32(target, CPUID, &cpuid); - if (retval != ERROR_OK) - return retval; - - if (((cpuid >> 4) & 0xc3f) == 0xc23) - LOG_DEBUG("Cortex-M3 r%" PRId8 "p%" PRId8 " processor detected", - (uint8_t)((cpuid >> 20) & 0xf), (uint8_t)((cpuid >> 0) & 0xf)); - LOG_DEBUG("cpuid: 0x%8.8" PRIx32 "", cpuid); - - /* NOTE: FPB and DWT are both optional. */ - - /* Setup FPB */ - target_read_u32(target, FP_CTRL, &fpcr); - cortex_m3->auto_bp_type = 1; - cortex_m3->fp_num_code = ((fpcr >> 8) & 0x70) | ((fpcr >> 4) & 0xF); /* bits [14:12] and [7:4] */ - cortex_m3->fp_num_lit = (fpcr >> 8) & 0xF; - cortex_m3->fp_code_available = cortex_m3->fp_num_code; - cortex_m3->fp_comparator_list = calloc(cortex_m3->fp_num_code + cortex_m3->fp_num_lit, sizeof(struct cortex_m3_fp_comparator)); - cortex_m3->fpb_enabled = fpcr & 1; - for (i = 0; i < cortex_m3->fp_num_code + cortex_m3->fp_num_lit; i++) - { - cortex_m3->fp_comparator_list[i].type = (i < cortex_m3->fp_num_code) ? FPCR_CODE : FPCR_LITERAL; - cortex_m3->fp_comparator_list[i].fpcr_address = FP_COMP0 + 4 * i; - } - LOG_DEBUG("FPB fpcr 0x%" PRIx32 ", numcode %i, numlit %i", fpcr, cortex_m3->fp_num_code, cortex_m3->fp_num_lit); - - /* Setup DWT */ - cortex_m3_dwt_setup(cortex_m3, target); - - /* These hardware breakpoints only work for code in flash! */ - LOG_INFO("%s: hardware has %d breakpoints, %d watchpoints", - target_name(target), - cortex_m3->fp_num_code, - cortex_m3->dwt_num_comp); - } - - return ERROR_OK; -} - -static int cortex_m3_dcc_read(struct adiv5_dap *swjdp, uint8_t *value, uint8_t *ctrl) -{ - uint16_t dcrdr; - int retval; - - mem_ap_read_buf_u16(swjdp, (uint8_t*)&dcrdr, 1, DCB_DCRDR); - *ctrl = (uint8_t)dcrdr; - *value = (uint8_t)(dcrdr >> 8); - - LOG_DEBUG("data 0x%x ctrl 0x%x", *value, *ctrl); - - /* write ack back to software dcc register - * signify we have read data */ - if (dcrdr & (1 << 0)) - { - dcrdr = 0; - retval = mem_ap_write_buf_u16(swjdp, (uint8_t*)&dcrdr, 1, DCB_DCRDR); - if (retval != ERROR_OK) - return retval; - } - - return ERROR_OK; -} - -static int cortex_m3_target_request_data(struct target *target, - uint32_t size, uint8_t *buffer) -{ - struct armv7m_common *armv7m = target_to_armv7m(target); - struct adiv5_dap *swjdp = &armv7m->dap; - uint8_t data; - uint8_t ctrl; - uint32_t i; - - for (i = 0; i < (size * 4); i++) - { - cortex_m3_dcc_read(swjdp, &data, &ctrl); - buffer[i] = data; - } - - return ERROR_OK; -} - -static int cortex_m3_handle_target_request(void *priv) -{ - struct target *target = priv; - if (!target_was_examined(target)) - return ERROR_OK; - struct armv7m_common *armv7m = target_to_armv7m(target); - struct adiv5_dap *swjdp = &armv7m->dap; - - if (!target->dbg_msg_enabled) - return ERROR_OK; - - if (target->state == TARGET_RUNNING) - { - uint8_t data; - uint8_t ctrl; - - cortex_m3_dcc_read(swjdp, &data, &ctrl); - - /* check if we have data */ - if (ctrl & (1 << 0)) - { - uint32_t request; - - /* we assume target is quick enough */ - request = data; - cortex_m3_dcc_read(swjdp, &data, &ctrl); - request |= (data << 8); - cortex_m3_dcc_read(swjdp, &data, &ctrl); - request |= (data << 16); - cortex_m3_dcc_read(swjdp, &data, &ctrl); - request |= (data << 24); - target_request(target, request); - } - } - - return ERROR_OK; -} - -static int cortex_m3_init_arch_info(struct target *target, - struct cortex_m3_common *cortex_m3, struct jtag_tap *tap) -{ - int retval; - struct armv7m_common *armv7m = &cortex_m3->armv7m; - - armv7m_init_arch_info(target, armv7m); - - /* prepare JTAG information for the new target */ - cortex_m3->jtag_info.tap = tap; - cortex_m3->jtag_info.scann_size = 4; - - /* default reset mode is to use srst if fitted - * if not it will use CORTEX_M3_RESET_VECTRESET */ - cortex_m3->soft_reset_config = CORTEX_M3_RESET_VECTRESET; - - armv7m->arm.dap = &armv7m->dap; - - /* Leave (only) generic DAP stuff for debugport_init(); */ - armv7m->dap.jtag_info = &cortex_m3->jtag_info; - armv7m->dap.memaccess_tck = 8; - /* Cortex-M3 has 4096 bytes autoincrement range */ - armv7m->dap.tar_autoincr_block = (1 << 12); - - /* register arch-specific functions */ - armv7m->examine_debug_reason = cortex_m3_examine_debug_reason; - - armv7m->post_debug_entry = NULL; - - armv7m->pre_restore_context = NULL; - - armv7m->load_core_reg_u32 = cortex_m3_load_core_reg_u32; - armv7m->store_core_reg_u32 = cortex_m3_store_core_reg_u32; - - target_register_timer_callback(cortex_m3_handle_target_request, 1, 1, target); - - if ((retval = arm_jtag_setup_connection(&cortex_m3->jtag_info)) != ERROR_OK) - { - return retval; - } - - return ERROR_OK; -} - -static int cortex_m3_target_create(struct target *target, Jim_Interp *interp) -{ - struct cortex_m3_common *cortex_m3 = calloc(1,sizeof(struct cortex_m3_common)); - - cortex_m3->common_magic = CORTEX_M3_COMMON_MAGIC; - cortex_m3_init_arch_info(target, cortex_m3, target->tap); - - return ERROR_OK; -} - -/*--------------------------------------------------------------------------*/ - -static int cortex_m3_verify_pointer(struct command_context *cmd_ctx, - struct cortex_m3_common *cm3) -{ - if (cm3->common_magic != CORTEX_M3_COMMON_MAGIC) { - command_print(cmd_ctx, "target is not a Cortex-M3"); - return ERROR_TARGET_INVALID; - } - return ERROR_OK; -} - -/* - * Only stuff below this line should need to verify that its target - * is a Cortex-M3. Everything else should have indirected through the - * cortexm3_target structure, which is only used with CM3 targets. - */ - -static const struct { - char name[10]; - unsigned mask; -} vec_ids[] = { - { "hard_err", VC_HARDERR, }, - { "int_err", VC_INTERR, }, - { "bus_err", VC_BUSERR, }, - { "state_err", VC_STATERR, }, - { "chk_err", VC_CHKERR, }, - { "nocp_err", VC_NOCPERR, }, - { "mm_err", VC_MMERR, }, - { "reset", VC_CORERESET, }, -}; - -COMMAND_HANDLER(handle_cortex_m3_vector_catch_command) -{ - struct target *target = get_current_target(CMD_CTX); - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct armv7m_common *armv7m = &cortex_m3->armv7m; - struct adiv5_dap *swjdp = &armv7m->dap; - uint32_t demcr = 0; - int retval; - - retval = cortex_m3_verify_pointer(CMD_CTX, cortex_m3); - if (retval != ERROR_OK) - return retval; - - retval = mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &demcr); - if (retval != ERROR_OK) - return retval; - - if (CMD_ARGC > 0) { - unsigned catch = 0; - - if (CMD_ARGC == 1) { - if (strcmp(CMD_ARGV[0], "all") == 0) { - catch = VC_HARDERR | VC_INTERR | VC_BUSERR - | VC_STATERR | VC_CHKERR | VC_NOCPERR - | VC_MMERR | VC_CORERESET; - goto write; - } else if (strcmp(CMD_ARGV[0], "none") == 0) { - goto write; - } - } - while (CMD_ARGC-- > 0) { - unsigned i; - for (i = 0; i < ARRAY_SIZE(vec_ids); i++) { - if (strcmp(CMD_ARGV[CMD_ARGC], vec_ids[i].name) != 0) - continue; - catch |= vec_ids[i].mask; - break; - } - if (i == ARRAY_SIZE(vec_ids)) { - LOG_ERROR("No CM3 vector '%s'", CMD_ARGV[CMD_ARGC]); - return ERROR_INVALID_ARGUMENTS; - } - } -write: - /* For now, armv7m->demcr only stores vector catch flags. */ - armv7m->demcr = catch; - - demcr &= ~0xffff; - demcr |= catch; - - /* write, but don't assume it stuck (why not??) */ - retval = mem_ap_write_u32(swjdp, DCB_DEMCR, demcr); - if (retval != ERROR_OK) - return retval; - retval = mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &demcr); - if (retval != ERROR_OK) - return retval; - - /* FIXME be sure to clear DEMCR on clean server shutdown. - * Otherwise the vector catch hardware could fire when there's - * no debugger hooked up, causing much confusion... - */ - } - - for (unsigned i = 0; i < ARRAY_SIZE(vec_ids); i++) - { - command_print(CMD_CTX, "%9s: %s", vec_ids[i].name, - (demcr & vec_ids[i].mask) ? "catch" : "ignore"); - } - - return ERROR_OK; -} - -COMMAND_HANDLER(handle_cortex_m3_mask_interrupts_command) -{ - struct target *target = get_current_target(CMD_CTX); - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - int retval; - - static const Jim_Nvp nvp_maskisr_modes[] = { - { .name = "auto", .value = CORTEX_M3_ISRMASK_AUTO }, - { .name = "off" , .value = CORTEX_M3_ISRMASK_OFF }, - { .name = "on" , .value = CORTEX_M3_ISRMASK_ON }, - { .name = NULL , .value = -1 }, - }; - const Jim_Nvp *n; - - - retval = cortex_m3_verify_pointer(CMD_CTX, cortex_m3); - if (retval != ERROR_OK) - return retval; - - if (target->state != TARGET_HALTED) - { - command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME); - return ERROR_OK; - } - - if (CMD_ARGC > 0) - { - n = Jim_Nvp_name2value_simple(nvp_maskisr_modes, CMD_ARGV[0]); - if (n->name == NULL) - { - return ERROR_COMMAND_SYNTAX_ERROR; - } - cortex_m3->isrmasking_mode = n->value; - - - if(cortex_m3->isrmasking_mode == CORTEX_M3_ISRMASK_ON) - { - cortex_m3_write_debug_halt_mask(target, C_HALT | C_MASKINTS, 0); - } - else - { - cortex_m3_write_debug_halt_mask(target, C_HALT, C_MASKINTS); - } - } - - n = Jim_Nvp_value2name_simple(nvp_maskisr_modes, cortex_m3->isrmasking_mode); - command_print(CMD_CTX, "cortex_m3 interrupt mask %s", n->name); - - return ERROR_OK; -} - -COMMAND_HANDLER(handle_cortex_m3_reset_config_command) -{ - struct target *target = get_current_target(CMD_CTX); - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - int retval; - char *reset_config; - - retval = cortex_m3_verify_pointer(CMD_CTX, cortex_m3); - if (retval != ERROR_OK) - return retval; - - if (CMD_ARGC > 0) - { - if (strcmp(*CMD_ARGV, "sysresetreq") == 0) - cortex_m3->soft_reset_config = CORTEX_M3_RESET_SYSRESETREQ; - else if (strcmp(*CMD_ARGV, "vectreset") == 0) - cortex_m3->soft_reset_config = CORTEX_M3_RESET_VECTRESET; - } - - switch (cortex_m3->soft_reset_config) - { - case CORTEX_M3_RESET_SYSRESETREQ: - reset_config = "sysresetreq"; - break; - - case CORTEX_M3_RESET_VECTRESET: - reset_config = "vectreset"; - break; - - default: - reset_config = "unknown"; - break; - } - - command_print(CMD_CTX, "cortex_m3 reset_config %s", reset_config); - - return ERROR_OK; -} - -static const struct command_registration cortex_m3_exec_command_handlers[] = { - { - .name = "maskisr", - .handler = handle_cortex_m3_mask_interrupts_command, - .mode = COMMAND_EXEC, - .help = "mask cortex_m3 interrupts", - .usage = "['auto'|'on'|'off']", - }, - { - .name = "vector_catch", - .handler = handle_cortex_m3_vector_catch_command, - .mode = COMMAND_EXEC, - .help = "configure hardware vectors to trigger debug entry", - .usage = "['all'|'none'|('bus_err'|'chk_err'|...)*]", - }, - { - .name = "reset_config", - .handler = handle_cortex_m3_reset_config_command, - .mode = COMMAND_ANY, - .help = "configure software reset handling", - .usage = "['srst'|'sysresetreq'|'vectreset']", - }, - COMMAND_REGISTRATION_DONE -}; -static const struct command_registration cortex_m3_command_handlers[] = { - { - .chain = armv7m_command_handlers, - }, - { - .name = "cortex_m3", - .mode = COMMAND_EXEC, - .help = "Cortex-M3 command group", - .chain = cortex_m3_exec_command_handlers, - }, - COMMAND_REGISTRATION_DONE -}; - -struct target_type cortexm3_target = -{ - .name = "cortex_m3", - - .poll = cortex_m3_poll, - .arch_state = armv7m_arch_state, - - .target_request_data = cortex_m3_target_request_data, - - .halt = cortex_m3_halt, - .resume = cortex_m3_resume, - .step = cortex_m3_step, - - .assert_reset = cortex_m3_assert_reset, - .deassert_reset = cortex_m3_deassert_reset, - .soft_reset_halt = cortex_m3_soft_reset_halt, - - .get_gdb_reg_list = armv7m_get_gdb_reg_list, - - .read_memory = cortex_m3_read_memory, - .write_memory = cortex_m3_write_memory, - .bulk_write_memory = cortex_m3_bulk_write_memory, - .checksum_memory = armv7m_checksum_memory, - .blank_check_memory = armv7m_blank_check_memory, - - .run_algorithm = armv7m_run_algorithm, - .start_algorithm = armv7m_start_algorithm, - .wait_algorithm = armv7m_wait_algorithm, - - .add_breakpoint = cortex_m3_add_breakpoint, - .remove_breakpoint = cortex_m3_remove_breakpoint, - .add_watchpoint = cortex_m3_add_watchpoint, - .remove_watchpoint = cortex_m3_remove_watchpoint, - - .commands = cortex_m3_command_handlers, - .target_create = cortex_m3_target_create, - .init_target = cortex_m3_init_target, - .examine = cortex_m3_examine, -}; diff --git a/src/target/cortex_m3.h b/src/target/cortex_m3.h deleted file mode 100644 index e16aa89fe..000000000 --- a/src/target/cortex_m3.h +++ /dev/null @@ -1,188 +0,0 @@ -/*************************************************************************** - * Copyright (C) 2005 by Dominic Rath * - * Dominic.Rath@gmx.de * - * * - * Copyright (C) 2006 by Magnus Lundin * - * lundin@mlu.mine.nu * - * * - * Copyright (C) 2008 by Spencer Oliver * - * spen@spen-soft.co.uk * - * * - * This program is free software; you can redistribute it and/or modify * - * it under the terms of the GNU General Public License as published by * - * the Free Software Foundation; either version 2 of the License, or * - * (at your option) any later version. * - * * - * This program is distributed in the hope that it will be useful, * - * but WITHOUT ANY WARRANTY; without even the implied warranty of * - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * - * GNU General Public License for more details. * - * * - * You should have received a copy of the GNU General Public License * - * along with this program; if not, write to the * - * Free Software Foundation, Inc., * - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * - ***************************************************************************/ -#ifndef CORTEX_M3_H -#define CORTEX_M3_H - -#include "armv7m.h" - - -#define CORTEX_M3_COMMON_MAGIC 0x1A451A45 - -#define SYSTEM_CONTROL_BASE 0x400FE000 - -#define CPUID 0xE000ED00 -/* Debug Control Block */ -#define DCB_DHCSR 0xE000EDF0 -#define DCB_DCRSR 0xE000EDF4 -#define DCB_DCRDR 0xE000EDF8 -#define DCB_DEMCR 0xE000EDFC - -#define DCRSR_WnR (1 << 16) - -#define DWT_CTRL 0xE0001000 -#define DWT_CYCCNT 0xE0001004 -#define DWT_COMP0 0xE0001020 -#define DWT_MASK0 0xE0001024 -#define DWT_FUNCTION0 0xE0001028 - -#define FP_CTRL 0xE0002000 -#define FP_REMAP 0xE0002004 -#define FP_COMP0 0xE0002008 -#define FP_COMP1 0xE000200C -#define FP_COMP2 0xE0002010 -#define FP_COMP3 0xE0002014 -#define FP_COMP4 0xE0002018 -#define FP_COMP5 0xE000201C -#define FP_COMP6 0xE0002020 -#define FP_COMP7 0xE0002024 - -/* DCB_DHCSR bit and field definitions */ -#define DBGKEY (0xA05F << 16) -#define C_DEBUGEN (1 << 0) -#define C_HALT (1 << 1) -#define C_STEP (1 << 2) -#define C_MASKINTS (1 << 3) -#define S_REGRDY (1 << 16) -#define S_HALT (1 << 17) -#define S_SLEEP (1 << 18) -#define S_LOCKUP (1 << 19) -#define S_RETIRE_ST (1 << 24) -#define S_RESET_ST (1 << 25) - -/* DCB_DEMCR bit and field definitions */ -#define TRCENA (1 << 24) -#define VC_HARDERR (1 << 10) -#define VC_INTERR (1 << 9) -#define VC_BUSERR (1 << 8) -#define VC_STATERR (1 << 7) -#define VC_CHKERR (1 << 6) -#define VC_NOCPERR (1 << 5) -#define VC_MMERR (1 << 4) -#define VC_CORERESET (1 << 0) - -#define NVIC_ICTR 0xE000E004 -#define NVIC_ISE0 0xE000E100 -#define NVIC_ICSR 0xE000ED04 -#define NVIC_AIRCR 0xE000ED0C -#define NVIC_SHCSR 0xE000ED24 -#define NVIC_CFSR 0xE000ED28 -#define NVIC_MMFSRb 0xE000ED28 -#define NVIC_BFSRb 0xE000ED29 -#define NVIC_USFSRh 0xE000ED2A -#define NVIC_HFSR 0xE000ED2C -#define NVIC_DFSR 0xE000ED30 -#define NVIC_MMFAR 0xE000ED34 -#define NVIC_BFAR 0xE000ED38 - -/* NVIC_AIRCR bits */ -#define AIRCR_VECTKEY (0x5FA << 16) -#define AIRCR_SYSRESETREQ (1 << 2) -#define AIRCR_VECTCLRACTIVE (1 << 1) -#define AIRCR_VECTRESET (1 << 0) -/* NVIC_SHCSR bits */ -#define SHCSR_BUSFAULTENA (1 << 17) -/* NVIC_DFSR bits */ -#define DFSR_HALTED 1 -#define DFSR_BKPT 2 -#define DFSR_DWTTRAP 4 -#define DFSR_VCATCH 8 - -#define FPCR_CODE 0 -#define FPCR_LITERAL 1 -#define FPCR_REPLACE_REMAP (0 << 30) -#define FPCR_REPLACE_BKPT_LOW (1 << 30) -#define FPCR_REPLACE_BKPT_HIGH (2 << 30) -#define FPCR_REPLACE_BKPT_BOTH (3 << 30) - -struct cortex_m3_fp_comparator -{ - int used; - int type; - uint32_t fpcr_value; - uint32_t fpcr_address; -}; - -struct cortex_m3_dwt_comparator -{ - int used; - uint32_t comp; - uint32_t mask; - uint32_t function; - uint32_t dwt_comparator_address; -}; - -enum cortex_m3_soft_reset_config -{ - CORTEX_M3_RESET_SYSRESETREQ, - CORTEX_M3_RESET_VECTRESET, -}; - -enum cortex_m3_isrmasking_mode -{ - CORTEX_M3_ISRMASK_AUTO, - CORTEX_M3_ISRMASK_OFF, - CORTEX_M3_ISRMASK_ON, -}; - -struct cortex_m3_common -{ - int common_magic; - struct arm_jtag jtag_info; - - /* Context information */ - uint32_t dcb_dhcsr; - uint32_t nvic_dfsr; /* Debug Fault Status Register - shows reason for debug halt */ - uint32_t nvic_icsr; /* Interrupt Control State Register - shows active and pending IRQ */ - - /* Flash Patch and Breakpoint (FPB) */ - int fp_num_lit; - int fp_num_code; - int fp_code_available; - int fpb_enabled; - int auto_bp_type; - struct cortex_m3_fp_comparator *fp_comparator_list; - - /* Data Watchpoint and Trace (DWT) */ - int dwt_num_comp; - int dwt_comp_available; - struct cortex_m3_dwt_comparator *dwt_comparator_list; - struct reg_cache *dwt_cache; - - enum cortex_m3_soft_reset_config soft_reset_config; - - enum cortex_m3_isrmasking_mode isrmasking_mode; - - struct armv7m_common armv7m; -}; - -static inline struct cortex_m3_common * -target_to_cm3(struct target *target) -{ - return container_of(target->arch_info, - struct cortex_m3_common, armv7m); -} - -#endif /* CORTEX_M3_H */