* Copyright (C) 2009 by Dirk Behme *
* dirk.behme@gmail.com - copy from cortex_m3 *
* *
+ * Copyright (C) 2010 Øyvind Harboe *
+ * oyvind.harboe@zylin.com *
+ * *
* 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 *
#include "breakpoints.h"
#include "cortex_a8.h"
-#include "armv4_5.h"
#include "register.h"
#include "target_request.h"
#include "target_type.h"
+#include "arm_opcodes.h"
+#include <helper/time_support.h>
static int cortex_a8_poll(struct target *target);
static int cortex_a8_debug_entry(struct target *target);
-static int cortex_a8_restore_context(struct target *target);
+static int cortex_a8_restore_context(struct target *target, bool bpwp);
static int cortex_a8_set_breakpoint(struct target *target,
struct breakpoint *breakpoint, uint8_t matchmode);
static int cortex_a8_unset_breakpoint(struct target *target,
uint32_t *value, int regnum);
static int cortex_a8_dap_write_coreregister_u32(struct target *target,
uint32_t value, int regnum);
+static int cortex_a8_mmu(struct target *target, int *enabled);
+static int cortex_a8_virt2phys(struct target *target,
+ uint32_t virt, uint32_t *phys);
+static int cortex_a8_disable_mmu_caches(struct target *target, int mmu,
+ int d_u_cache, int i_cache);
+static int cortex_a8_enable_mmu_caches(struct target *target, int mmu,
+ int d_u_cache, int i_cache);
+static int cortex_a8_get_ttb(struct target *target, uint32_t *result);
+
+
/*
* FIXME do topology discovery using the ROM; don't
- * assume this is an OMAP3.
+ * assume this is an OMAP3. Also, allow for multiple ARMv7-A
+ * cores, with different AP numbering ... don't use a #define
+ * for these numbers, use per-core armv7a state.
*/
#define swjdp_memoryap 0
#define swjdp_debugap 1
static int cortex_a8_init_debug_access(struct target *target)
{
struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct adiv5_dap *swjdp = &armv7a->dap;
int retval;
uint32_t dummy;
/* The debugport might be uninitialised so try twice */
retval = mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55);
if (retval != ERROR_OK)
- mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55);
+ {
+ /* try again */
+ retval = mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55);
+ if (retval == ERROR_OK)
+ {
+ LOG_USER("Locking debug access failed on first, but succeeded on second try.");
+ }
+ }
+ if (retval != ERROR_OK)
+ return retval;
/* Clear Sticky Power Down status Bit in PRSR to enable access to
the registers in the Core Power Domain */
retval = mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_PRSR, &dummy);
+ if (retval != ERROR_OK)
+ return retval;
+
/* Enabling of instruction execution in debug mode is done in debug_entry code */
/* Resync breakpoint registers */
- /* Since this is likley called from init or reset, update targtet state information*/
- cortex_a8_poll(target);
+ /* Since this is likely called from init or reset, update target state information*/
+ retval = cortex_a8_poll(target);
return retval;
}
-int cortex_a8_exec_opcode(struct target *target, uint32_t opcode)
+/* To reduce needless round-trips, pass in a pointer to the current
+ * DSCR value. Initialize it to zero if you just need to know the
+ * value on return from this function; or DSCR_INSTR_COMP if you
+ * happen to know that no instruction is pending.
+ */
+static int cortex_a8_exec_opcode(struct target *target,
+ uint32_t opcode, uint32_t *dscr_p)
{
uint32_t dscr;
int retval;
struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct adiv5_dap *swjdp = &armv7a->dap;
+
+ dscr = dscr_p ? *dscr_p : 0;
LOG_DEBUG("exec opcode 0x%08" PRIx32, opcode);
- do
+
+ /* Wait for InstrCompl bit to be set */
+ long long then = timeval_ms();
+ while ((dscr & DSCR_INSTR_COMP) == 0)
{
retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DSCR, &dscr);
LOG_ERROR("Could not read DSCR register, opcode = 0x%08" PRIx32, opcode);
return retval;
}
+ if (timeval_ms() > then + 1000)
+ {
+ LOG_ERROR("Timeout waiting for cortex_a8_exec_opcode");
+ return ERROR_FAIL;
+ }
}
- while ((dscr & (1 << DSCR_INSTR_COMP)) == 0); /* Wait for InstrCompl bit to be set */
- mem_ap_write_u32(swjdp, armv7a->debug_base + CPUDBG_ITR, opcode);
+ retval = mem_ap_write_u32(swjdp, armv7a->debug_base + CPUDBG_ITR, opcode);
+ if (retval != ERROR_OK)
+ return retval;
+ then = timeval_ms();
do
{
retval = mem_ap_read_atomic_u32(swjdp,
LOG_ERROR("Could not read DSCR register");
return retval;
}
+ if (timeval_ms() > then + 1000)
+ {
+ LOG_ERROR("Timeout waiting for cortex_a8_exec_opcode");
+ return ERROR_FAIL;
+ }
}
- while ((dscr & (1 << DSCR_INSTR_COMP)) == 0); /* Wait for InstrCompl bit to be set */
+ while ((dscr & DSCR_INSTR_COMP) == 0); /* Wait for InstrCompl bit to be set */
+
+ if (dscr_p)
+ *dscr_p = dscr;
return retval;
}
{
int retval = ERROR_OK;
struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct adiv5_dap *swjdp = &armv7a->dap;
+
+ retval = cortex_a8_dap_read_coreregister_u32(target, regfile, 0);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = cortex_a8_dap_write_coreregister_u32(target, address, 0);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = cortex_a8_exec_opcode(target, ARMV4_5_STMIA(0, 0xFFFE, 0, 0), NULL);
+ if (retval != ERROR_OK)
+ return retval;
- cortex_a8_dap_read_coreregister_u32(target, regfile, 0);
- cortex_a8_dap_write_coreregister_u32(target, address, 0);
- cortex_a8_exec_opcode(target, ARMV4_5_STMIA(0, 0xFFFE, 0, 0));
dap_ap_select(swjdp, swjdp_memoryap);
- mem_ap_read_buf_u32(swjdp, (uint8_t *)(®file[1]), 4*15, address);
+ retval = mem_ap_read_buf_u32(swjdp, (uint8_t *)(®file[1]), 4*15, address);
+ if (retval != ERROR_OK)
+ return retval;
dap_ap_select(swjdp, swjdp_debugap);
return retval;
}
-static int cortex_a8_read_cp(struct target *target, uint32_t *value, uint8_t CP,
- uint8_t op1, uint8_t CRn, uint8_t CRm, uint8_t op2)
+static int cortex_a8_dap_read_coreregister_u32(struct target *target,
+ uint32_t *value, int regnum)
{
- int retval;
+ int retval = ERROR_OK;
+ uint8_t reg = regnum&0xFF;
+ uint32_t dscr = 0;
struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct adiv5_dap *swjdp = &armv7a->dap;
- cortex_a8_exec_opcode(target, ARMV4_5_MRC(CP, op1, 0, CRn, CRm, op2));
- /* Move R0 to DTRTX */
- cortex_a8_exec_opcode(target, ARMV4_5_MCR(14, 0, 0, 0, 5, 0));
+ if (reg > 17)
+ return retval;
+
+ if (reg < 15)
+ {
+ /* Rn to DCCTX, "MCR p14, 0, Rn, c0, c5, 0" 0xEE00nE15 */
+ retval = cortex_a8_exec_opcode(target,
+ ARMV4_5_MCR(14, 0, reg, 0, 5, 0),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ else if (reg == 15)
+ {
+ /* "MOV r0, r15"; then move r0 to DCCTX */
+ retval = cortex_a8_exec_opcode(target, 0xE1A0000F, &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = cortex_a8_exec_opcode(target,
+ ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ else
+ {
+ /* "MRS r0, CPSR" or "MRS r0, SPSR"
+ * then move r0 to DCCTX
+ */
+ retval = cortex_a8_exec_opcode(target, ARMV4_5_MRS(0, reg & 1), &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = cortex_a8_exec_opcode(target,
+ ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ /* Wait for DTRRXfull then read DTRRTX */
+ long long then = timeval_ms();
+ while ((dscr & DSCR_DTR_TX_FULL) == 0)
+ {
+ retval = mem_ap_read_atomic_u32(swjdp,
+ armv7a->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ if (timeval_ms() > then + 1000)
+ {
+ LOG_ERROR("Timeout waiting for cortex_a8_exec_opcode");
+ return ERROR_FAIL;
+ }
+ }
- /* Read DCCTX */
retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DTRTX, value);
+ LOG_DEBUG("read DCC 0x%08" PRIx32, *value);
return retval;
}
-static int cortex_a8_write_cp(struct target *target, uint32_t value,
- uint8_t CP, uint8_t op1, uint8_t CRn, uint8_t CRm, uint8_t op2)
+static int cortex_a8_dap_write_coreregister_u32(struct target *target,
+ uint32_t value, int regnum)
{
- int retval;
+ int retval = ERROR_OK;
+ uint8_t Rd = regnum&0xFF;
uint32_t dscr;
struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct adiv5_dap *swjdp = &armv7a->dap;
- LOG_DEBUG("CP%i, CRn %i, value 0x%08" PRIx32, CP, CRn, value);
+ LOG_DEBUG("register %i, value 0x%08" PRIx32, regnum, value);
/* Check that DCCRX is not full */
retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DSCR, &dscr);
- if (dscr & (1 << DSCR_DTR_RX_FULL))
+ if (retval != ERROR_OK)
+ return retval;
+ if (dscr & DSCR_DTR_RX_FULL)
{
LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr);
/* Clear DCCRX with MCR(p14, 0, Rd, c0, c5, 0), opcode 0xEE000E15 */
- cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0));
+ retval = cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
}
+ if (Rd > 17)
+ return retval;
+
+ /* Write DTRRX ... sets DSCR.DTRRXfull but exec_opcode() won't care */
+ LOG_DEBUG("write DCC 0x%08" PRIx32, value);
retval = mem_ap_write_u32(swjdp,
armv7a->debug_base + CPUDBG_DTRRX, value);
- /* Move DTRRX to r0 */
- cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0));
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (Rd < 15)
+ {
+ /* DCCRX to Rn, "MCR p14, 0, Rn, c0, c5, 0", 0xEE00nE15 */
+ retval = cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, Rd, 0, 5, 0),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ else if (Rd == 15)
+ {
+ /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15
+ * then "mov r15, r0"
+ */
+ retval = cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = cortex_a8_exec_opcode(target, 0xE1A0F000, &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ else
+ {
+ /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15
+ * then "MSR CPSR_cxsf, r0" or "MSR SPSR_cxsf, r0" (all fields)
+ */
+ retval = cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = cortex_a8_exec_opcode(target, ARMV4_5_MSR_GP(0, 0xF, Rd & 1),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* "Prefetch flush" after modifying execution status in CPSR */
+ if (Rd == 16)
+ {
+ retval = cortex_a8_exec_opcode(target,
+ ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ }
- cortex_a8_exec_opcode(target, ARMV4_5_MCR(CP, op1, 0, CRn, CRm, op2));
return retval;
}
-static int cortex_a8_read_cp15(struct target *target, uint32_t op1, uint32_t op2,
- uint32_t CRn, uint32_t CRm, uint32_t *value)
+/* Write to memory mapped registers directly with no cache or mmu handling */
+static int cortex_a8_dap_write_memap_register_u32(struct target *target, uint32_t address, uint32_t value)
{
- return cortex_a8_read_cp(target, value, 15, op1, CRn, CRm, op2);
+ int retval;
+ struct armv7a_common *armv7a = target_to_armv7a(target);
+ struct adiv5_dap *swjdp = &armv7a->dap;
+
+ retval = mem_ap_write_atomic_u32(swjdp, address, value);
+
+ return retval;
}
-static int cortex_a8_write_cp15(struct target *target, uint32_t op1, uint32_t op2,
- uint32_t CRn, uint32_t CRm, uint32_t value)
+/*
+ * Cortex-A8 implementation of Debug Programmer's Model
+ *
+ * NOTE the invariant: these routines return with DSCR_INSTR_COMP set,
+ * so there's no need to poll for it before executing an instruction.
+ *
+ * NOTE that in several of these cases the "stall" mode might be useful.
+ * It'd let us queue a few operations together... prepare/finish might
+ * be the places to enable/disable that mode.
+ */
+
+static inline struct cortex_a8_common *dpm_to_a8(struct arm_dpm *dpm)
{
- return cortex_a8_write_cp(target, value, 15, op1, CRn, CRm, op2);
+ return container_of(dpm, struct cortex_a8_common, armv7a_common.dpm);
}
-static int cortex_a8_mrc(struct target *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
+static int cortex_a8_write_dcc(struct cortex_a8_common *a8, uint32_t data)
{
- if (cpnum!=15)
- {
- LOG_ERROR("Only cp15 is supported");
- return ERROR_FAIL;
- }
- return cortex_a8_read_cp15(target, op1, op2, CRn, CRm, value);
+ LOG_DEBUG("write DCC 0x%08" PRIx32, data);
+ return mem_ap_write_u32(&a8->armv7a_common.dap,
+ a8->armv7a_common.debug_base + CPUDBG_DTRRX, data);
}
-static int cortex_a8_mcr(struct target *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
+static int cortex_a8_read_dcc(struct cortex_a8_common *a8, uint32_t *data,
+ uint32_t *dscr_p)
{
- if (cpnum!=15)
- {
- LOG_ERROR("Only cp15 is supported");
- return ERROR_FAIL;
+ struct adiv5_dap *swjdp = &a8->armv7a_common.dap;
+ uint32_t dscr = DSCR_INSTR_COMP;
+ int retval;
+
+ if (dscr_p)
+ dscr = *dscr_p;
+
+ /* Wait for DTRRXfull */
+ long long then = timeval_ms();
+ while ((dscr & DSCR_DTR_TX_FULL) == 0) {
+ retval = mem_ap_read_atomic_u32(swjdp,
+ a8->armv7a_common.debug_base + CPUDBG_DSCR,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ if (timeval_ms() > then + 1000)
+ {
+ LOG_ERROR("Timeout waiting for read dcc");
+ return ERROR_FAIL;
+ }
}
- return cortex_a8_write_cp15(target, op1, op2, CRn, CRm, value);
-}
+ retval = mem_ap_read_atomic_u32(swjdp,
+ a8->armv7a_common.debug_base + CPUDBG_DTRTX, data);
+ if (retval != ERROR_OK)
+ return retval;
+ //LOG_DEBUG("read DCC 0x%08" PRIx32, *data);
+ if (dscr_p)
+ *dscr_p = dscr;
-static int cortex_a8_dap_read_coreregister_u32(struct target *target,
- uint32_t *value, int regnum)
+ return retval;
+}
+
+static int cortex_a8_dpm_prepare(struct arm_dpm *dpm)
{
- int retval = ERROR_OK;
- uint8_t reg = regnum&0xFF;
+ struct cortex_a8_common *a8 = dpm_to_a8(dpm);
+ struct adiv5_dap *swjdp = &a8->armv7a_common.dap;
uint32_t dscr;
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
-
- if (reg > 16)
- return retval;
+ int retval;
- if (reg < 15)
- {
- /* Rn to DCCTX, MCR p14, 0, Rd, c0, c5, 0, 0xEE000E15 */
- cortex_a8_exec_opcode(target, ARMV4_5_MCR(14, 0, reg, 0, 5, 0));
- }
- else if (reg == 15)
- {
- cortex_a8_exec_opcode(target, 0xE1A0000F);
- cortex_a8_exec_opcode(target, ARMV4_5_MCR(14, 0, 0, 0, 5, 0));
- }
- else if (reg == 16)
+ /* set up invariant: INSTR_COMP is set after ever DPM operation */
+ long long then = timeval_ms();
+ for (;;)
{
- cortex_a8_exec_opcode(target, ARMV4_5_MRS(0, 0));
- cortex_a8_exec_opcode(target, ARMV4_5_MCR(14, 0, 0, 0, 5, 0));
+ retval = mem_ap_read_atomic_u32(swjdp,
+ a8->armv7a_common.debug_base + CPUDBG_DSCR,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+ if ((dscr & DSCR_INSTR_COMP) != 0)
+ break;
+ if (timeval_ms() > then + 1000)
+ {
+ LOG_ERROR("Timeout waiting for dpm prepare");
+ return ERROR_FAIL;
+ }
}
- /* Read DTRRTX */
- do
- {
- retval = mem_ap_read_atomic_u32(swjdp,
- armv7a->debug_base + CPUDBG_DSCR, &dscr);
+ /* this "should never happen" ... */
+ if (dscr & DSCR_DTR_RX_FULL) {
+ LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr);
+ /* Clear DCCRX */
+ retval = cortex_a8_exec_opcode(
+ a8->armv7a_common.armv4_5_common.target,
+ ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
}
- while ((dscr & (1 << DSCR_DTR_TX_FULL)) == 0); /* Wait for DTRRXfull */
- retval = mem_ap_read_atomic_u32(swjdp,
- armv7a->debug_base + CPUDBG_DTRTX, value);
+ return retval;
+}
+
+static int cortex_a8_dpm_finish(struct arm_dpm *dpm)
+{
+ /* REVISIT what could be done here? */
+ return ERROR_OK;
+}
+
+static int cortex_a8_instr_write_data_dcc(struct arm_dpm *dpm,
+ uint32_t opcode, uint32_t data)
+{
+ struct cortex_a8_common *a8 = dpm_to_a8(dpm);
+ int retval;
+ uint32_t dscr = DSCR_INSTR_COMP;
+
+ retval = cortex_a8_write_dcc(a8, data);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return cortex_a8_exec_opcode(
+ a8->armv7a_common.armv4_5_common.target,
+ opcode,
+ &dscr);
+}
+
+static int cortex_a8_instr_write_data_r0(struct arm_dpm *dpm,
+ uint32_t opcode, uint32_t data)
+{
+ struct cortex_a8_common *a8 = dpm_to_a8(dpm);
+ uint32_t dscr = DSCR_INSTR_COMP;
+ int retval;
+
+ retval = cortex_a8_write_dcc(a8, data);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15 */
+ retval = cortex_a8_exec_opcode(
+ a8->armv7a_common.armv4_5_common.target,
+ ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* then the opcode, taking data from R0 */
+ retval = cortex_a8_exec_opcode(
+ a8->armv7a_common.armv4_5_common.target,
+ opcode,
+ &dscr);
return retval;
}
-static int cortex_a8_dap_write_coreregister_u32(struct target *target, uint32_t value, int regnum)
+static int cortex_a8_instr_cpsr_sync(struct arm_dpm *dpm)
{
- int retval = ERROR_OK;
- uint8_t Rd = regnum&0xFF;
- uint32_t dscr;
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct target *target = dpm->arm->target;
+ uint32_t dscr = DSCR_INSTR_COMP;
- LOG_DEBUG("register %i, value 0x%08" PRIx32, regnum, value);
+ /* "Prefetch flush" after modifying execution status in CPSR */
+ return cortex_a8_exec_opcode(target,
+ ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
+ &dscr);
+}
- /* Check that DCCRX is not full */
- retval = mem_ap_read_atomic_u32(swjdp,
- armv7a->debug_base + CPUDBG_DSCR, &dscr);
- if (dscr & (1 << DSCR_DTR_RX_FULL))
- {
- LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr);
- /* Clear DCCRX with MCR(p14, 0, Rd, c0, c5, 0), opcode 0xEE000E15 */
- cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0));
- }
+static int cortex_a8_instr_read_data_dcc(struct arm_dpm *dpm,
+ uint32_t opcode, uint32_t *data)
+{
+ struct cortex_a8_common *a8 = dpm_to_a8(dpm);
+ int retval;
+ uint32_t dscr = DSCR_INSTR_COMP;
- if (Rd > 16)
+ /* the opcode, writing data to DCC */
+ retval = cortex_a8_exec_opcode(
+ a8->armv7a_common.armv4_5_common.target,
+ opcode,
+ &dscr);
+ if (retval != ERROR_OK)
return retval;
- /* Write to DCCRX */
- retval = mem_ap_write_u32(swjdp,
- armv7a->debug_base + CPUDBG_DTRRX, value);
+ return cortex_a8_read_dcc(a8, data, &dscr);
+}
- if (Rd < 15)
- {
- /* DCCRX to Rd, MCR p14, 0, Rd, c0, c5, 0, 0xEE000E15 */
- cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, Rd, 0, 5, 0));
- }
- else if (Rd == 15)
- {
- cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0));
- cortex_a8_exec_opcode(target, 0xE1A0F000);
- }
- else if (Rd == 16)
- {
- cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0));
- cortex_a8_exec_opcode(target, ARMV4_5_MSR_GP(0, 0xF, 0));
- /* Execute a PrefetchFlush instruction through the ITR. */
- cortex_a8_exec_opcode(target, ARMV4_5_MCR(15, 0, 0, 7, 5, 4));
+
+static int cortex_a8_instr_read_data_r0(struct arm_dpm *dpm,
+ uint32_t opcode, uint32_t *data)
+{
+ struct cortex_a8_common *a8 = dpm_to_a8(dpm);
+ uint32_t dscr = DSCR_INSTR_COMP;
+ int retval;
+
+ /* the opcode, writing data to R0 */
+ retval = cortex_a8_exec_opcode(
+ a8->armv7a_common.armv4_5_common.target,
+ opcode,
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* write R0 to DCC */
+ retval = cortex_a8_exec_opcode(
+ a8->armv7a_common.armv4_5_common.target,
+ ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
+ &dscr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return cortex_a8_read_dcc(a8, data, &dscr);
+}
+
+static int cortex_a8_bpwp_enable(struct arm_dpm *dpm, unsigned index_t,
+ uint32_t addr, uint32_t control)
+{
+ struct cortex_a8_common *a8 = dpm_to_a8(dpm);
+ uint32_t vr = a8->armv7a_common.debug_base;
+ uint32_t cr = a8->armv7a_common.debug_base;
+ int retval;
+
+ switch (index_t) {
+ case 0 ... 15: /* breakpoints */
+ vr += CPUDBG_BVR_BASE;
+ cr += CPUDBG_BCR_BASE;
+ break;
+ case 16 ... 31: /* watchpoints */
+ vr += CPUDBG_WVR_BASE;
+ cr += CPUDBG_WCR_BASE;
+ index_t -= 16;
+ break;
+ default:
+ return ERROR_FAIL;
}
+ vr += 4 * index_t;
+ cr += 4 * index_t;
+
+ LOG_DEBUG("A8: bpwp enable, vr %08x cr %08x",
+ (unsigned) vr, (unsigned) cr);
+ retval = cortex_a8_dap_write_memap_register_u32(dpm->arm->target,
+ vr, addr);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = cortex_a8_dap_write_memap_register_u32(dpm->arm->target,
+ cr, control);
return retval;
}
-/* Write to memory mapped registers directly with no cache or mmu handling */
-static int cortex_a8_dap_write_memap_register_u32(struct target *target, uint32_t address, uint32_t value)
+static int cortex_a8_bpwp_disable(struct arm_dpm *dpm, unsigned index_t)
+{
+ struct cortex_a8_common *a8 = dpm_to_a8(dpm);
+ uint32_t cr;
+
+ switch (index_t) {
+ case 0 ... 15:
+ cr = a8->armv7a_common.debug_base + CPUDBG_BCR_BASE;
+ break;
+ case 16 ... 31:
+ cr = a8->armv7a_common.debug_base + CPUDBG_WCR_BASE;
+ index_t -= 16;
+ break;
+ default:
+ return ERROR_FAIL;
+ }
+ cr += 4 * index_t;
+
+ LOG_DEBUG("A8: bpwp disable, cr %08x", (unsigned) cr);
+
+ /* clear control register */
+ return cortex_a8_dap_write_memap_register_u32(dpm->arm->target, cr, 0);
+}
+
+static int cortex_a8_dpm_setup(struct cortex_a8_common *a8, uint32_t didr)
{
+ struct arm_dpm *dpm = &a8->armv7a_common.dpm;
int retval;
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
- retval = mem_ap_write_atomic_u32(swjdp, address, value);
+ dpm->arm = &a8->armv7a_common.armv4_5_common;
+ dpm->didr = didr;
+
+ dpm->prepare = cortex_a8_dpm_prepare;
+ dpm->finish = cortex_a8_dpm_finish;
+
+ dpm->instr_write_data_dcc = cortex_a8_instr_write_data_dcc;
+ dpm->instr_write_data_r0 = cortex_a8_instr_write_data_r0;
+ dpm->instr_cpsr_sync = cortex_a8_instr_cpsr_sync;
+
+ dpm->instr_read_data_dcc = cortex_a8_instr_read_data_dcc;
+ dpm->instr_read_data_r0 = cortex_a8_instr_read_data_r0;
+
+ dpm->bpwp_enable = cortex_a8_bpwp_enable;
+ dpm->bpwp_disable = cortex_a8_bpwp_disable;
+
+ retval = arm_dpm_setup(dpm);
+ if (retval == ERROR_OK)
+ retval = arm_dpm_initialize(dpm);
return retval;
}
+
/*
* Cortex-A8 Run control
*/
uint32_t dscr;
struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct adiv5_dap *swjdp = &armv7a->dap;
enum target_state prev_target_state = target->state;
uint8_t saved_apsel = dap_ap_get_select(swjdp);
int retval = ERROR_OK;
uint32_t dscr;
struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct adiv5_dap *swjdp = &armv7a->dap;
uint8_t saved_apsel = dap_ap_get_select(swjdp);
dap_ap_select(swjdp, swjdp_debugap);
*/
retval = mem_ap_write_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DRCR, 0x1);
+ if (retval != ERROR_OK)
+ goto out;
/*
* enter halting debug mode
*/
- mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_DSCR, &dscr);
- retval = mem_ap_write_atomic_u32(swjdp,
- armv7a->debug_base + CPUDBG_DSCR, dscr | (1 << DSCR_HALT_DBG_MODE));
+ retval = mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ goto out;
+ retval = mem_ap_write_atomic_u32(swjdp,
+ armv7a->debug_base + CPUDBG_DSCR, dscr | DSCR_HALT_DBG_MODE);
if (retval != ERROR_OK)
goto out;
- do {
- mem_ap_read_atomic_u32(swjdp,
+ long long then = timeval_ms();
+ for (;;)
+ {
+ retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DSCR, &dscr);
- } while ((dscr & (1 << DSCR_CORE_HALTED)) == 0);
+ if (retval != ERROR_OK)
+ goto out;
+ if ((dscr & DSCR_CORE_HALTED) != 0)
+ {
+ break;
+ }
+ if (timeval_ms() > then + 1000)
+ {
+ LOG_ERROR("Timeout waiting for halt");
+ return ERROR_FAIL;
+ }
+ }
target->debug_reason = DBG_REASON_DBGRQ;
uint32_t address, int handle_breakpoints, int debug_execution)
{
struct armv7a_common *armv7a = target_to_armv7a(target);
- struct armv4_5_common_s *armv4_5 = &armv7a->armv4_5_common;
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct arm *armv4_5 = &armv7a->armv4_5_common;
+ struct adiv5_dap *swjdp = &armv7a->dap;
+ int retval;
// struct breakpoint *breakpoint = NULL;
uint32_t resume_pc, dscr;
dap_ap_select(swjdp, swjdp_debugap);
if (!debug_execution)
- {
target_free_all_working_areas(target);
-// cortex_m3_enable_breakpoints(target);
-// cortex_m3_enable_watchpoints(target);
- }
#if 0
if (debug_execution)
#endif
/* current = 1: continue on current pc, otherwise continue at <address> */
- resume_pc = buf_get_u32(
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 15).value,
- 0, 32);
+ resume_pc = buf_get_u32(armv4_5->pc->value, 0, 32);
if (!current)
resume_pc = address;
/* Make sure that the Armv7 gdb thumb fixups does not
* kill the return address
*/
- if (armv7a->core_state == ARMV7A_STATE_ARM)
+ switch (armv4_5->core_state)
{
+ case ARM_STATE_ARM:
resume_pc &= 0xFFFFFFFC;
- }
- /* When the return address is loaded into PC
- * bit 0 must be 1 to stay in Thumb state
- */
- if (armv7a->core_state == ARMV7A_STATE_THUMB)
- {
+ break;
+ case ARM_STATE_THUMB:
+ case ARM_STATE_THUMB_EE:
+ /* When the return address is loaded into PC
+ * bit 0 must be 1 to stay in Thumb state
+ */
resume_pc |= 0x1;
+ break;
+ case ARM_STATE_JAZELLE:
+ LOG_ERROR("How do I resume into Jazelle state??");
+ return ERROR_FAIL;
}
LOG_DEBUG("resume pc = 0x%08" PRIx32, resume_pc);
- buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 15).value,
- 0, 32, resume_pc);
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 15).dirty = 1;
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 15).valid = 1;
-
- cortex_a8_restore_context(target);
-// arm7_9_restore_context(target); TODO Context is currently NOT Properly restored
+ buf_set_u32(armv4_5->pc->value, 0, 32, resume_pc);
+ armv4_5->pc->dirty = 1;
+ armv4_5->pc->valid = 1;
+
+ retval = cortex_a8_restore_context(target, handle_breakpoints);
+ if (retval != ERROR_OK)
+ return retval;
+
#if 0
/* the front-end may request us not to handle breakpoints */
if (handle_breakpoints)
}
#endif
- /* Restart core and wait for it to be started */
- mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_DRCR, 0x2);
+ /* Restart core and wait for it to be started
+ * NOTE: this clears DSCR_ITR_EN and other bits.
+ *
+ * REVISIT: for single stepping, we probably want to
+ * disable IRQs by default, with optional override...
+ */
+ retval = mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_DRCR, 0x2);
+ if (retval != ERROR_OK)
+ return retval;
- do {
- mem_ap_read_atomic_u32(swjdp,
+ long long then = timeval_ms();
+ for (;;)
+ {
+ retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DSCR, &dscr);
- } while ((dscr & (1 << DSCR_CORE_RESTARTED)) == 0);
+ if (retval != ERROR_OK)
+ return retval;
+ if ((dscr & DSCR_CORE_RESTARTED) != 0)
+ break;
+ if (timeval_ms() > then + 1000)
+ {
+ LOG_ERROR("Timeout waiting for resume");
+ return ERROR_FAIL;
+ }
+ }
target->debug_reason = DBG_REASON_NOTHALTED;
target->state = TARGET_RUNNING;
/* registers are now invalid */
- armv4_5_invalidate_core_regs(target);
+ register_cache_invalidate(armv4_5->core_cache);
if (!debug_execution)
{
static int cortex_a8_debug_entry(struct target *target)
{
int i;
- uint32_t regfile[16], pc, cpsr, dscr;
+ uint32_t regfile[16], cpsr, dscr;
int retval = ERROR_OK;
struct working_area *regfile_working_area = NULL;
struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
struct armv7a_common *armv7a = target_to_armv7a(target);
- struct armv4_5_common_s *armv4_5 = &armv7a->armv4_5_common;
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct arm *armv4_5 = &armv7a->armv4_5_common;
+ struct adiv5_dap *swjdp = &armv7a->dap;
+ struct reg *reg;
LOG_DEBUG("dscr = 0x%08" PRIx32, cortex_a8->cpudbg_dscr);
- /* Enable the ITR execution once we are in debug mode */
- mem_ap_read_atomic_u32(swjdp,
+ /* REVISIT surely we should not re-read DSCR !! */
+ retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DSCR, &dscr);
- dscr |= (1 << DSCR_EXT_INT_EN);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* REVISIT see A8 TRM 12.11.4 steps 2..3 -- make sure that any
+ * imprecise data aborts get discarded by issuing a Data
+ * Synchronization Barrier: ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
+ */
+
+ /* Enable the ITR execution once we are in debug mode */
+ dscr |= DSCR_ITR_EN;
retval = mem_ap_write_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DSCR, dscr);
+ if (retval != ERROR_OK)
+ return retval;
/* Examine debug reason */
- switch ((cortex_a8->cpudbg_dscr >> 2)&0xF)
- {
- case 0:
- case 4:
- target->debug_reason = DBG_REASON_DBGRQ;
- break;
- case 1:
- case 3:
- target->debug_reason = DBG_REASON_BREAKPOINT;
- break;
- case 10:
- target->debug_reason = DBG_REASON_WATCHPOINT;
- break;
- default:
- target->debug_reason = DBG_REASON_UNDEFINED;
- break;
+ arm_dpm_report_dscr(&armv7a->dpm, cortex_a8->cpudbg_dscr);
+
+ /* save address of instruction that triggered the watchpoint? */
+ if (target->debug_reason == DBG_REASON_WATCHPOINT) {
+ uint32_t wfar;
+
+ retval = mem_ap_read_atomic_u32(swjdp,
+ armv7a->debug_base + CPUDBG_WFAR,
+ &wfar);
+ if (retval != ERROR_OK)
+ return retval;
+ arm_dpm_report_wfar(&armv7a->dpm, wfar);
}
+ /* REVISIT fast_reg_read is never set ... */
+
/* Examine target state and mode */
if (cortex_a8->fast_reg_read)
target_alloc_working_area(target, 64, ®file_working_area);
/* First load register acessible through core debug port*/
if (!regfile_working_area)
{
- for (i = 0; i <= 15; i++)
- cortex_a8_dap_read_coreregister_u32(target,
- ®file[i], i);
+ retval = arm_dpm_read_current_registers(&armv7a->dpm);
}
else
{
dap_ap_select(swjdp, swjdp_memoryap);
- cortex_a8_read_regs_through_mem(target,
+ retval = cortex_a8_read_regs_through_mem(target,
regfile_working_area->address, regfile);
dap_ap_select(swjdp, swjdp_memoryap);
target_free_working_area(target, regfile_working_area);
- }
+ if (retval != ERROR_OK)
+ {
+ return retval;
+ }
- cortex_a8_dap_read_coreregister_u32(target, &cpsr, 16);
- pc = regfile[15];
- dap_ap_select(swjdp, swjdp_debugap);
- LOG_DEBUG("cpsr: %8.8" PRIx32, cpsr);
+ /* read Current PSR */
+ retval = cortex_a8_dap_read_coreregister_u32(target, &cpsr, 16);
+ if (retval != ERROR_OK)
+ return retval;
+ dap_ap_select(swjdp, swjdp_debugap);
+ LOG_DEBUG("cpsr: %8.8" PRIx32, cpsr);
- armv4_5->core_mode = cpsr & 0x1F;
- armv7a->core_state = (cpsr & 0x20)?ARMV7A_STATE_THUMB:ARMV7A_STATE_ARM;
+ arm_set_cpsr(armv4_5, cpsr);
- for (i = 0; i <= ARM_PC; i++)
- {
- buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, i).value,
- 0, 32, regfile[i]);
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, i).valid = 1;
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, i).dirty = 0;
- }
- buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 16).value,
- 0, 32, cpsr);
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).valid = 1;
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).dirty = 0;
-
- /* Fixup PC Resume Address */
- if (armv7a->core_state == ARMV7A_STATE_THUMB)
- {
- // T bit set for Thumb or ThumbEE state
- regfile[ARM_PC] -= 4;
- }
- else
- {
- // ARM state
- regfile[ARM_PC] -= 8;
- }
- buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, ARM_PC).value,
- 0, 32, regfile[ARM_PC]);
+ /* update cache */
+ for (i = 0; i <= ARM_PC; i++)
+ {
+ reg = arm_reg_current(armv4_5, i);
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0)
- .dirty = ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 0).valid;
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 15)
- .dirty = ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 15).valid;
+ buf_set_u32(reg->value, 0, 32, regfile[i]);
+ reg->valid = 1;
+ reg->dirty = 0;
+ }
+
+ /* Fixup PC Resume Address */
+ if (cpsr & (1 << 5))
+ {
+ // T bit set for Thumb or ThumbEE state
+ regfile[ARM_PC] -= 4;
+ }
+ else
+ {
+ // ARM state
+ regfile[ARM_PC] -= 8;
+ }
+
+ reg = armv4_5->pc;
+ buf_set_u32(reg->value, 0, 32, regfile[ARM_PC]);
+ reg->dirty = reg->valid;
+ }
#if 0
/* TODO, Move this */
/* Are we in an exception handler */
// armv4_5->exception_number = 0;
- if (armv7a->post_debug_entry)
- armv7a->post_debug_entry(target);
-
-
+ if (armv7a->post_debug_entry)
+ {
+ retval = armv7a->post_debug_entry(target);
+ if (retval != ERROR_OK)
+ return retval;
+ }
return retval;
-
}
-static void cortex_a8_post_debug_entry(struct target *target)
+static int cortex_a8_post_debug_entry(struct target *target)
{
struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
+ int retval;
-// cortex_a8_read_cp(target, &cp15_control_register, 15, 0, 1, 0, 0);
- /* examine cp15 control reg */
- armv7a->read_cp15(target, 0, 0, 1, 0, &cortex_a8->cp15_control_reg);
- jtag_execute_queue();
+ /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 0, /* op1, op2 */
+ 1, 0, /* CRn, CRm */
+ &cortex_a8->cp15_control_reg);
+ if (retval != ERROR_OK)
+ return retval;
LOG_DEBUG("cp15_control_reg: %8.8" PRIx32, cortex_a8->cp15_control_reg);
if (armv7a->armv4_5_mmu.armv4_5_cache.ctype == -1)
{
uint32_t cache_type_reg;
- /* identify caches */
- armv7a->read_cp15(target, 0, 1, 0, 0, &cache_type_reg);
- jtag_execute_queue();
+
+ /* MRC p15,0,<Rt>,c0,c0,1 ; Read CP15 Cache Type Register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 1, /* op1, op2 */
+ 0, 0, /* CRn, CRm */
+ &cache_type_reg);
+ if (retval != ERROR_OK)
+ return retval;
+ LOG_DEBUG("cp15 cache type: %8.8x", (unsigned) cache_type_reg);
+
/* FIXME the armv4_4 cache info DOES NOT APPLY to Cortex-A8 */
armv4_5_identify_cache(cache_type_reg,
&armv7a->armv4_5_mmu.armv4_5_cache);
armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled =
(cortex_a8->cp15_control_reg & 0x1000U) ? 1 : 0;
-
+ return ERROR_OK;
}
static int cortex_a8_step(struct target *target, int current, uint32_t address,
int handle_breakpoints)
{
struct armv7a_common *armv7a = target_to_armv7a(target);
- struct armv4_5_common_s *armv4_5 = &armv7a->armv4_5_common;
+ struct arm *armv4_5 = &armv7a->armv4_5_common;
struct breakpoint *breakpoint = NULL;
struct breakpoint stepbreakpoint;
-
- int timeout = 100;
+ struct reg *r;
+ int retval;
if (target->state != TARGET_HALTED)
{
}
/* current = 1: continue on current pc, otherwise continue at <address> */
+ r = armv4_5->pc;
if (!current)
{
- buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, ARM_PC).value,
- 0, 32, address);
+ buf_set_u32(r->value, 0, 32, address);
}
else
{
- address = buf_get_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, ARM_PC).value,
- 0, 32);
+ address = buf_get_u32(r->value, 0, 32);
}
/* The front-end may request us not to handle breakpoints.
*/
handle_breakpoints = 1;
if (handle_breakpoints) {
- breakpoint = breakpoint_find(target,
- buf_get_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 15).value,
- 0, 32));
+ breakpoint = breakpoint_find(target, address);
if (breakpoint)
cortex_a8_unset_breakpoint(target, breakpoint);
}
/* Setup single step breakpoint */
stepbreakpoint.address = address;
- stepbreakpoint.length = (armv7a->core_state == ARMV7A_STATE_THUMB) ? 2 : 4;
+ stepbreakpoint.length = (armv4_5->core_state == ARM_STATE_THUMB)
+ ? 2 : 4;
stepbreakpoint.type = BKPT_HARD;
stepbreakpoint.set = 0;
target->debug_reason = DBG_REASON_SINGLESTEP;
- cortex_a8_resume(target, 1, address, 0, 0);
+ retval = cortex_a8_resume(target, 1, address, 0, 0);
+ if (retval != ERROR_OK)
+ return retval;
+ long long then = timeval_ms();
while (target->state != TARGET_HALTED)
{
- cortex_a8_poll(target);
- if (--timeout == 0)
+ retval = cortex_a8_poll(target);
+ if (retval != ERROR_OK)
+ return retval;
+ if (timeval_ms() > then + 1000)
{
- LOG_WARNING("timeout waiting for target halt");
- break;
+ LOG_ERROR("timeout waiting for target halt");
+ return ERROR_FAIL;
}
}
cortex_a8_unset_breakpoint(target, &stepbreakpoint);
- if (timeout > 0) target->debug_reason = DBG_REASON_BREAKPOINT;
+
+ target->debug_reason = DBG_REASON_BREAKPOINT;
if (breakpoint)
cortex_a8_set_breakpoint(target, breakpoint, 0);
return ERROR_OK;
}
-static int cortex_a8_restore_context(struct target *target)
+static int cortex_a8_restore_context(struct target *target, bool bpwp)
{
- int i;
- uint32_t value;
struct armv7a_common *armv7a = target_to_armv7a(target);
- struct armv4_5_common_s *armv4_5 = &armv7a->armv4_5_common;
LOG_DEBUG(" ");
if (armv7a->pre_restore_context)
armv7a->pre_restore_context(target);
- for (i = 15; i >= 0; i--)
- {
- if (ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, i).dirty)
- {
- value = buf_get_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, i).value,
- 0, 32);
- /* TODO Check return values */
- cortex_a8_dap_write_coreregister_u32(target, value, i);
- }
- }
-
- if (armv7a->post_restore_context)
- armv7a->post_restore_context(target);
-
- return ERROR_OK;
-}
-
-
-#if 0
-/*
- * Cortex-A8 Core register functions
- */
-static int cortex_a8_load_core_reg_u32(struct target *target, int num,
- armv4_5_mode_t mode, uint32_t * value)
-{
- int retval;
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
-
- if ((num <= ARM_CPSR))
- {
- /* read a normal core register */
- retval = cortex_a8_dap_read_coreregister_u32(target, 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, num, *value);
- }
- else
- {
- return ERROR_INVALID_ARGUMENTS;
- }
-
- /* Register other than r0 - r14 uses r0 for access */
- if (num > 14)
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 0).dirty =
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 0).valid;
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 15).dirty =
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, 15).valid;
-
- return ERROR_OK;
-}
-
-static int cortex_a8_store_core_reg_u32(struct target *target, int num,
- armv4_5_mode_t mode, uint32_t value)
-{
- int retval;
-// uint32_t reg;
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
-
-#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.) */
-
- if (num == 14)
- value |= 0x01;
-#endif
-
- if ((num <= ARM_CPSR))
- {
- retval = cortex_a8_dap_write_coreregister_u32(target, value, num);
- if (retval != ERROR_OK)
- {
- LOG_ERROR("JTAG failure %i", retval);
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, num).dirty =
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- armv4_5->core_mode, num).valid;
- return ERROR_JTAG_DEVICE_ERROR;
- }
- LOG_DEBUG("write core reg %i value 0x%" PRIx32, num, value);
- }
- else
- {
- return ERROR_INVALID_ARGUMENTS;
- }
-
- return ERROR_OK;
-}
-#endif
-
-
-static int cortex_a8_read_core_reg(struct target *target, int num,
- enum armv4_5_mode mode)
-{
- uint32_t value;
- int retval;
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
-
- cortex_a8_dap_read_coreregister_u32(target, &value, num);
-
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- return retval;
- }
-
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache, mode, num).valid = 1;
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache, mode, num).dirty = 0;
- buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
- mode, num).value, 0, 32, value);
-
- return ERROR_OK;
-}
-
-int cortex_a8_write_core_reg(struct target *target, int num,
- enum armv4_5_mode mode, uint32_t value)
-{
- int retval;
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
-
- cortex_a8_dap_write_coreregister_u32(target, value, num);
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- return retval;
- }
-
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache, mode, num).valid = 1;
- ARMV7A_CORE_REG_MODE(armv4_5->core_cache, mode, num).dirty = 0;
-
- return ERROR_OK;
+ return arm_dpm_write_dirty_registers(&armv7a->dpm, bpwp);
}
/*
- * Cortex-A8 Breakpoint and watchpoint fuctions
+ * Cortex-A8 Breakpoint and watchpoint functions
*/
/* Setup hardware Breakpoint Register Pair */
if (brp_i >= cortex_a8->brp_num)
{
LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
- exit(-1);
+ return ERROR_FAIL;
}
breakpoint->set = brp_i + 1;
if (breakpoint->length == 2)
brp_list[brp_i].used = 1;
brp_list[brp_i].value = (breakpoint->address & 0xFFFFFFFC);
brp_list[brp_i].control = control;
- cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ retval = cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
brp_list[brp_i].value);
- cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ if (retval != ERROR_OK)
+ return retval;
+ retval = cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
brp_list[brp_i].control);
+ if (retval != ERROR_OK)
+ return retval;
LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_i,
brp_list[brp_i].control,
brp_list[brp_i].value);
brp_list[brp_i].used = 0;
brp_list[brp_i].value = 0;
brp_list[brp_i].control = 0;
- cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ retval = cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
brp_list[brp_i].control);
- cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ if (retval != ERROR_OK)
+ return retval;
+ retval = cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
brp_list[brp_i].value);
+ if (retval != ERROR_OK)
+ return retval;
}
else
{
return ERROR_OK;
}
-int cortex_a8_add_breakpoint(struct target *target, struct breakpoint *breakpoint)
+static int cortex_a8_add_breakpoint(struct target *target,
+ struct breakpoint *breakpoint)
{
struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
#if 0
-/* It is perfectly possible to remove brakpoints while the taget is running */
+/* It is perfectly possible to remove breakpoints while the target is running */
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
/*
- * Cortex-A8 Reset fuctions
+ * Cortex-A8 Reset functions
*/
static int cortex_a8_assert_reset(struct target *target)
{
+ struct armv7a_common *armv7a = target_to_armv7a(target);
LOG_DEBUG(" ");
+ /* FIXME when halt is requested, make it work somehow... */
+
+ /* Issue some kind of warm reset. */
+ if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT)) {
+ target_handle_event(target, TARGET_EVENT_RESET_ASSERT);
+ } else if (jtag_get_reset_config() & RESET_HAS_SRST) {
+ /* REVISIT handle "pulls" cases, if there's
+ * hardware that needs them to work.
+ */
+ jtag_add_reset(0, 1);
+ } else {
+ LOG_ERROR("%s: how to reset?", target_name(target));
+ return ERROR_FAIL;
+ }
+
/* registers are now invalid */
- armv4_5_invalidate_core_regs(target);
+ register_cache_invalidate(armv7a->armv4_5_common.core_cache);
target->state = TARGET_RESET;
static int cortex_a8_deassert_reset(struct target *target)
{
+ int retval;
LOG_DEBUG(" ");
- if (target->reset_halt)
- {
- int retval;
- if ((retval = target_halt(target)) != ERROR_OK)
- return retval;
+ /* be certain SRST is off */
+ jtag_add_reset(0, 0);
+
+ retval = cortex_a8_poll(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (target->reset_halt) {
+ if (target->state != TARGET_HALTED) {
+ LOG_WARNING("%s: ran after reset and before halt ...",
+ target_name(target));
+ if ((retval = target_halt(target)) != ERROR_OK)
+ return retval;
+ }
}
return ERROR_OK;
* ap number for every access.
*/
+static int cortex_a8_read_phys_memory(struct target *target,
+ uint32_t address, uint32_t size,
+ uint32_t count, uint8_t *buffer)
+{
+ struct armv7a_common *armv7a = target_to_armv7a(target);
+ struct adiv5_dap *swjdp = &armv7a->dap;
+ int retval = ERROR_INVALID_ARGUMENTS;
+
+ /* cortex_a8 handles unaligned memory access */
+
+// ??? dap_ap_select(swjdp, swjdp_memoryap);
+ LOG_DEBUG("Reading memory at real address 0x%x; size %d; count %d", address, size, count);
+ 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_a8_read_memory(struct target *target, uint32_t address,
uint32_t size, uint32_t count, uint8_t *buffer)
{
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
-
- int retval = ERROR_OK;
-
- /* sanitize arguments */
- if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
- return ERROR_INVALID_ARGUMENTS;
+ int enabled = 0;
+ uint32_t virt, phys;
+ int retval;
/* cortex_a8 handles unaligned memory access */
// ??? dap_ap_select(swjdp, swjdp_memoryap);
-
- 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;
- default:
- LOG_ERROR("BUG: we shouldn't get here");
- exit(-1);
- }
-
- return retval;
+ LOG_DEBUG("Reading memory at address 0x%x; size %d; count %d", address, size, count);
+ retval = cortex_a8_mmu(target, &enabled);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if(enabled)
+ {
+ virt = address;
+ retval = cortex_a8_virt2phys(target, virt, &phys);
+ if (retval != ERROR_OK)
+ return retval;
+
+ LOG_DEBUG("Reading at virtual address. Translating v:0x%x to r:0x%x", virt, phys);
+ address = phys;
+ }
+
+ return cortex_a8_read_phys_memory(target, address, size, count, buffer);
}
-int cortex_a8_write_memory(struct target *target, uint32_t address,
- uint32_t size, uint32_t count, uint8_t *buffer)
+static int cortex_a8_write_phys_memory(struct target *target,
+ uint32_t address, uint32_t size,
+ uint32_t count, uint8_t *buffer)
{
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
-
- int retval;
-
- /* sanitize arguments */
- if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
- return ERROR_INVALID_ARGUMENTS;
-
-// ??? dap_ap_select(swjdp, swjdp_memoryap);
-
- 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;
- default:
- LOG_ERROR("BUG: we shouldn't get here");
- exit(-1);
- }
-
- if (target->state == TARGET_HALTED)
- {
- /* The Cache handling will NOT work with MMU active, the wrong addresses will be invalidated */
- /* invalidate I-Cache */
- if (armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
- {
- /* Invalidate ICache single entry with MVA, repeat this for all cache
- lines in the address range, Cortex-A8 has fixed 64 byte line length */
- /* Invalidate Cache single entry with MVA to PoU */
- for (uint32_t cacheline=address; cacheline<address+size*count; cacheline+=64)
- armv7a->write_cp15(target, 0, 1, 7, 5, cacheline); /* I-Cache to PoU */
- }
- /* invalidate D-Cache */
- if (armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled)
- {
- /* Invalidate Cache single entry with MVA to PoC */
- for (uint32_t cacheline=address; cacheline<address+size*count; cacheline+=64)
- armv7a->write_cp15(target, 0, 1, 7, 6, cacheline); /* U/D cache to PoC */
- }
- }
+ struct armv7a_common *armv7a = target_to_armv7a(target);
+ struct adiv5_dap *swjdp = &armv7a->dap;
+ int retval = ERROR_INVALID_ARGUMENTS;
+
+// ??? dap_ap_select(swjdp, swjdp_memoryap);
+
+ LOG_DEBUG("Writing memory to real address 0x%x; size %d; count %d", address, size, count);
+ 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;
+ }
+ }
+
+ /* REVISIT this op is generic ARMv7-A/R stuff */
+ if (retval == ERROR_OK && target->state == TARGET_HALTED)
+ {
+ struct arm_dpm *dpm = armv7a->armv4_5_common.dpm;
+
+ retval = dpm->prepare(dpm);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* The Cache handling will NOT work with MMU active, the
+ * wrong addresses will be invalidated!
+ *
+ * For both ICache and DCache, walk all cache lines in the
+ * address range. Cortex-A8 has fixed 64 byte line length.
+ *
+ * REVISIT per ARMv7, these may trigger watchpoints ...
+ */
+
+ /* invalidate I-Cache */
+ if (armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
+ {
+ /* ICIMVAU - Invalidate Cache single entry
+ * with MVA to PoU
+ * MCR p15, 0, r0, c7, c5, 1
+ */
+ for (uint32_t cacheline = address;
+ cacheline < address + size * count;
+ cacheline += 64) {
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV4_5_MCR(15, 0, 0, 7, 5, 1),
+ cacheline);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ }
+
+ /* invalidate D-Cache */
+ if (armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled)
+ {
+ /* DCIMVAC - Invalidate data Cache line
+ * with MVA to PoC
+ * MCR p15, 0, r0, c7, c6, 1
+ */
+ for (uint32_t cacheline = address;
+ cacheline < address + size * count;
+ cacheline += 64) {
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV4_5_MCR(15, 0, 0, 7, 6, 1),
+ cacheline);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ }
+
+ /* (void) */ dpm->finish(dpm);
+ }
+
+ return retval;
+}
- return retval;
+static int cortex_a8_write_memory(struct target *target, uint32_t address,
+ uint32_t size, uint32_t count, uint8_t *buffer)
+{
+ int enabled = 0;
+ uint32_t virt, phys;
+ int retval;
+
+// ??? dap_ap_select(swjdp, swjdp_memoryap);
+
+ LOG_DEBUG("Writing memory to address 0x%x; size %d; count %d", address, size, count);
+ retval = cortex_a8_mmu(target, &enabled);
+ if (retval != ERROR_OK)
+ return retval;
+ if(enabled)
+ {
+ virt = address;
+ retval = cortex_a8_virt2phys(target, virt, &phys);
+ if (retval != ERROR_OK)
+ return retval;
+ LOG_DEBUG("Writing to virtual address. Translating v:0x%x to r:0x%x", virt, phys);
+ address = phys;
+ }
+
+ return cortex_a8_write_phys_memory(target, address, size,
+ count, buffer);
}
static int cortex_a8_bulk_write_memory(struct target *target, uint32_t address,
}
-static int cortex_a8_dcc_read(struct swjdp_common *swjdp, uint8_t *value, uint8_t *ctrl)
+static int cortex_a8_dcc_read(struct adiv5_dap *swjdp, uint8_t *value, uint8_t *ctrl)
{
#if 0
u16 dcrdr;
{
struct target *target = priv;
struct armv7a_common *armv7a = target_to_armv7a(target);
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct adiv5_dap *swjdp = &armv7a->dap;
+ int retval;
if (!target_was_examined(target))
return ERROR_OK;
uint8_t data = 0;
uint8_t ctrl = 0;
- cortex_a8_dcc_read(swjdp, &data, &ctrl);
+ retval = cortex_a8_dcc_read(swjdp, &data, &ctrl);
+ if (retval != ERROR_OK)
+ return retval;
/* check if we have data */
if (ctrl & (1 << 0))
/* we assume target is quick enough */
request = data;
- cortex_a8_dcc_read(swjdp, &data, &ctrl);
+ retval = cortex_a8_dcc_read(swjdp, &data, &ctrl);
+ if (retval != ERROR_OK)
+ return retval;
request |= (data << 8);
- cortex_a8_dcc_read(swjdp, &data, &ctrl);
+ retval = cortex_a8_dcc_read(swjdp, &data, &ctrl);
+ if (retval != ERROR_OK)
+ return retval;
request |= (data << 16);
- cortex_a8_dcc_read(swjdp, &data, &ctrl);
+ retval = cortex_a8_dcc_read(swjdp, &data, &ctrl);
+ if (retval != ERROR_OK)
+ return retval;
request |= (data << 24);
target_request(target, request);
}
* Cortex-A8 target information and configuration
*/
-static int cortex_a8_examine(struct target *target)
+static int cortex_a8_examine_first(struct target *target)
{
struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ struct adiv5_dap *swjdp = &armv7a->dap;
int i;
int retval = ERROR_OK;
uint32_t didr, ctypr, ttypr, cpuid;
- LOG_DEBUG("TODO");
+ /* stop assuming this is an OMAP! */
+ LOG_DEBUG("TODO - autoconfigure");
/* Here we shall insert a proper ROM Table scan */
armv7a->debug_base = OMAP3530_DEBUG_BASE;
/* We do one extra read to ensure DAP is configured,
* we call ahbap_debugport_init(swjdp) instead
*/
- ahbap_debugport_init(swjdp);
- mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_CPUID, &cpuid);
+ retval = ahbap_debugport_init(swjdp);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_CPUID, &cpuid);
+ if (retval != ERROR_OK)
+ return retval;
+
if ((retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_CPUID, &cpuid)) != ERROR_OK)
{
- LOG_DEBUG("Examine failed");
+ LOG_DEBUG("Examine %s failed", "CPUID");
return retval;
}
if ((retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_CTYPR, &ctypr)) != ERROR_OK)
{
- LOG_DEBUG("Examine failed");
+ LOG_DEBUG("Examine %s failed", "CTYPR");
return retval;
}
if ((retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_TTYPR, &ttypr)) != ERROR_OK)
{
- LOG_DEBUG("Examine failed");
+ LOG_DEBUG("Examine %s failed", "TTYPR");
return retval;
}
if ((retval = mem_ap_read_atomic_u32(swjdp,
armv7a->debug_base + CPUDBG_DIDR, &didr)) != ERROR_OK)
{
- LOG_DEBUG("Examine failed");
+ LOG_DEBUG("Examine %s failed", "DIDR");
return retval;
}
LOG_DEBUG("ttypr = 0x%08" PRIx32, ttypr);
LOG_DEBUG("didr = 0x%08" PRIx32, didr);
+ armv7a->armv4_5_common.core_type = ARM_MODE_MON;
+ retval = cortex_a8_dpm_setup(cortex_a8, didr);
+ if (retval != ERROR_OK)
+ return retval;
+
/* Setup Breakpoint Register Pairs */
cortex_a8->brp_num = ((didr >> 24) & 0x0F) + 1;
cortex_a8->brp_num_context = ((didr >> 20) & 0x0F) + 1;
cortex_a8->brp_list[i].BRPn = i;
}
- /* Setup Watchpoint Register Pairs */
- cortex_a8->wrp_num = ((didr >> 28) & 0x0F) + 1;
- cortex_a8->wrp_num_available = cortex_a8->wrp_num;
- cortex_a8->wrp_list = calloc(cortex_a8->wrp_num, sizeof(struct cortex_a8_wrp));
- for (i = 0; i < cortex_a8->wrp_num; i++)
- {
- cortex_a8->wrp_list[i].used = 0;
- cortex_a8->wrp_list[i].type = 0;
- cortex_a8->wrp_list[i].value = 0;
- cortex_a8->wrp_list[i].control = 0;
- cortex_a8->wrp_list[i].WRPn = i;
- }
- LOG_DEBUG("Configured %i hw breakpoint pairs and %i hw watchpoint pairs",
- cortex_a8->brp_num , cortex_a8->wrp_num);
-
- /* Configure core debug access */
- cortex_a8_init_debug_access(target);
+ LOG_DEBUG("Configured %i hw breakpoints", cortex_a8->brp_num);
target_set_examined(target);
+ return ERROR_OK;
+}
+
+static int cortex_a8_examine(struct target *target)
+{
+ int retval = ERROR_OK;
+
+ /* don't re-probe hardware after each reset */
+ if (!target_was_examined(target))
+ retval = cortex_a8_examine_first(target);
+
+ /* Configure core debug access */
+ if (retval == ERROR_OK)
+ retval = cortex_a8_init_debug_access(target);
return retval;
}
* Cortex-A8 target creation and initialization
*/
-static void cortex_a8_build_reg_cache(struct target *target)
-{
- struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
- struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
-
- (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
- armv4_5->core_cache = (*cache_p);
-}
-
-
static int cortex_a8_init_target(struct command_context *cmd_ctx,
struct target *target)
{
- cortex_a8_build_reg_cache(target);
+ /* examine_first() does a bunch of this */
return ERROR_OK;
}
-int cortex_a8_init_arch_info(struct target *target,
+static int cortex_a8_init_arch_info(struct target *target,
struct cortex_a8_common *cortex_a8, struct jtag_tap *tap)
{
- struct arm *armv4_5;
- struct armv7a_common *armv7a;
+ struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
+ struct arm *armv4_5 = &armv7a->armv4_5_common;
+ struct adiv5_dap *dap = &armv7a->dap;
- armv7a = &cortex_a8->armv7a_common;
- armv4_5 = &armv7a->armv4_5_common;
- struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ armv7a->armv4_5_common.dap = dap;
/* Setup struct cortex_a8_common */
cortex_a8->common_magic = CORTEX_A8_COMMON_MAGIC;
armv4_5->arch_info = armv7a;
- armv4_5_init_arch_info(target, armv4_5);
-
/* prepare JTAG information for the new target */
cortex_a8->jtag_info.tap = tap;
cortex_a8->jtag_info.scann_size = 4;
-LOG_DEBUG(" ");
- swjdp->dp_select_value = -1;
- swjdp->ap_csw_value = -1;
- swjdp->ap_tar_value = -1;
- swjdp->jtag_info = &cortex_a8->jtag_info;
- swjdp->memaccess_tck = 80;
+
+ /* Leave (only) generic DAP stuff for debugport_init() */
+ dap->jtag_info = &cortex_a8->jtag_info;
+ dap->memaccess_tck = 80;
/* Number of bits for tar autoincrement, impl. dep. at least 10 */
- swjdp->tar_autoincr_block = (1 << 10);
+ dap->tar_autoincr_block = (1 << 10);
cortex_a8->fast_reg_read = 0;
+ /* Set default value */
+ cortex_a8->current_address_mode = ARM_MODE_ANY;
/* register arch-specific functions */
armv7a->examine_debug_reason = NULL;
armv7a->post_debug_entry = cortex_a8_post_debug_entry;
armv7a->pre_restore_context = NULL;
- armv7a->post_restore_context = NULL;
armv7a->armv4_5_mmu.armv4_5_cache.ctype = -1;
-// armv7a->armv4_5_mmu.get_ttb = armv7a_get_ttb;
- armv7a->armv4_5_mmu.read_memory = cortex_a8_read_memory;
- armv7a->armv4_5_mmu.write_memory = cortex_a8_write_memory;
-// armv7a->armv4_5_mmu.disable_mmu_caches = armv7a_disable_mmu_caches;
-// armv7a->armv4_5_mmu.enable_mmu_caches = armv7a_enable_mmu_caches;
+ armv7a->armv4_5_mmu.get_ttb = cortex_a8_get_ttb;
+ armv7a->armv4_5_mmu.read_memory = cortex_a8_read_phys_memory;
+ armv7a->armv4_5_mmu.write_memory = cortex_a8_write_phys_memory;
+ armv7a->armv4_5_mmu.disable_mmu_caches = cortex_a8_disable_mmu_caches;
+ armv7a->armv4_5_mmu.enable_mmu_caches = cortex_a8_enable_mmu_caches;
armv7a->armv4_5_mmu.has_tiny_pages = 1;
armv7a->armv4_5_mmu.mmu_enabled = 0;
- armv7a->read_cp15 = cortex_a8_read_cp15;
- armv7a->write_cp15 = cortex_a8_write_cp15;
// arm7_9->handle_target_request = cortex_a8_handle_target_request;
- armv4_5->read_core_reg = cortex_a8_read_core_reg;
- armv4_5->write_core_reg = cortex_a8_write_core_reg;
-// armv4_5->full_context = arm7_9_full_context;
-
-// armv4_5->load_core_reg_u32 = cortex_a8_load_core_reg_u32;
-// armv4_5->store_core_reg_u32 = cortex_a8_store_core_reg_u32;
-// armv4_5->read_core_reg = armv4_5_read_core_reg; /* this is default */
-// armv4_5->write_core_reg = armv4_5_write_core_reg;
+ /* REVISIT v7a setup should be in a v7a-specific routine */
+ arm_init_arch_info(target, armv4_5);
+ armv7a->common_magic = ARMV7_COMMON_MAGIC;
target_register_timer_callback(cortex_a8_handle_target_request, 1, 1, target);
{
struct cortex_a8_common *cortex_a8 = calloc(1, sizeof(struct cortex_a8_common));
- cortex_a8_init_arch_info(target, cortex_a8, target->tap);
-
- return ERROR_OK;
+ return cortex_a8_init_arch_info(target, cortex_a8, target->tap);
}
-COMMAND_HANDLER(cortex_a8_handle_cache_info_command)
+static int cortex_a8_get_ttb(struct target *target, uint32_t *result)
{
- struct target *target = get_current_target(cmd_ctx);
- struct armv7a_common *armv7a = target_to_armv7a(target);
+ struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
+ struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
+ uint32_t ttb = 0, retval = ERROR_OK;
+
+ /* current_address_mode is set inside cortex_a8_virt2phys()
+ where we can determine if address belongs to user or kernel */
+ if(cortex_a8->current_address_mode == ARM_MODE_SVC)
+ {
+ /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 1, /* op1, op2 */
+ 2, 0, /* CRn, CRm */
+ &ttb);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ else if(cortex_a8->current_address_mode == ARM_MODE_USR)
+ {
+ /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 0, /* op1, op2 */
+ 2, 0, /* CRn, CRm */
+ &ttb);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ /* we don't know whose address is: user or kernel
+ we assume that if we are in kernel mode then
+ address belongs to kernel else if in user mode
+ - to user */
+ else if(armv7a->armv4_5_common.core_mode == ARM_MODE_SVC)
+ {
+ /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 1, /* op1, op2 */
+ 2, 0, /* CRn, CRm */
+ &ttb);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ else if(armv7a->armv4_5_common.core_mode == ARM_MODE_USR)
+ {
+ /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 0, /* op1, op2 */
+ 2, 0, /* CRn, CRm */
+ &ttb);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+ /* finally we don't know whose ttb to use: user or kernel */
+ else
+ LOG_ERROR("Don't know how to get ttb for current mode!!!");
- return armv4_5_handle_cache_info_command(cmd_ctx,
- &armv7a->armv4_5_mmu.armv4_5_cache);
+ ttb &= 0xffffc000;
+
+ *result = ttb;
+
+ return ERROR_OK;
}
+static int cortex_a8_disable_mmu_caches(struct target *target, int mmu,
+ int d_u_cache, int i_cache)
+{
+ struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
+ struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
+ uint32_t cp15_control;
+ int retval;
-COMMAND_HANDLER(cortex_a8_handle_dbginit_command)
+ /* read cp15 control register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 0, /* op1, op2 */
+ 1, 0, /* CRn, CRm */
+ &cp15_control);
+ if (retval != ERROR_OK)
+ return retval;
+
+
+ if (mmu)
+ cp15_control &= ~0x1U;
+
+ if (d_u_cache)
+ cp15_control &= ~0x4U;
+
+ if (i_cache)
+ cp15_control &= ~0x1000U;
+
+ retval = armv7a->armv4_5_common.mcr(target, 15,
+ 0, 0, /* op1, op2 */
+ 1, 0, /* CRn, CRm */
+ cp15_control);
+ return retval;
+}
+
+static int cortex_a8_enable_mmu_caches(struct target *target, int mmu,
+ int d_u_cache, int i_cache)
{
- struct target *target = get_current_target(cmd_ctx);
+ struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
+ struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
+ uint32_t cp15_control;
+ int retval;
+
+ /* read cp15 control register */
+ retval = armv7a->armv4_5_common.mrc(target, 15,
+ 0, 0, /* op1, op2 */
+ 1, 0, /* CRn, CRm */
+ &cp15_control);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (mmu)
+ cp15_control |= 0x1U;
+
+ if (d_u_cache)
+ cp15_control |= 0x4U;
+
+ if (i_cache)
+ cp15_control |= 0x1000U;
+
+ retval = armv7a->armv4_5_common.mcr(target, 15,
+ 0, 0, /* op1, op2 */
+ 1, 0, /* CRn, CRm */
+ cp15_control);
+ return retval;
+}
+
- cortex_a8_init_debug_access(target);
+static int cortex_a8_mmu(struct target *target, int *enabled)
+{
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("%s: target not halted", __func__);
+ return ERROR_TARGET_INVALID;
+ }
+ *enabled = target_to_cortex_a8(target)->armv7a_common.armv4_5_mmu.mmu_enabled;
return ERROR_OK;
}
-
-static int cortex_a8_register_commands(struct command_context *cmd_ctx)
+static int cortex_a8_virt2phys(struct target *target,
+ uint32_t virt, uint32_t *phys)
{
- struct command *cortex_a8_cmd;
- int retval = ERROR_OK;
+ uint32_t cb;
+ struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
+ // struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
+ struct armv7a_common *armv7a = target_to_armv7a(target);
- armv4_5_register_commands(cmd_ctx);
- armv7a_register_commands(cmd_ctx);
+ /* We assume that virtual address is separated
+ between user and kernel in Linux style:
+ 0x00000000-0xbfffffff - User space
+ 0xc0000000-0xffffffff - Kernel space */
+ if( virt < 0xc0000000 ) /* Linux user space */
+ cortex_a8->current_address_mode = ARM_MODE_USR;
+ else /* Linux kernel */
+ cortex_a8->current_address_mode = ARM_MODE_SVC;
+ uint32_t ret;
+ int retval = armv4_5_mmu_translate_va(target,
+ &armv7a->armv4_5_mmu, virt, &cb, &ret);
+ if (retval != ERROR_OK)
+ return retval;
+ /* Reset the flag. We don't want someone else to use it by error */
+ cortex_a8->current_address_mode = ARM_MODE_ANY;
+
+ *phys = ret;
+ return ERROR_OK;
+}
- cortex_a8_cmd = register_command(cmd_ctx, NULL, "cortex_a8",
- NULL, COMMAND_ANY,
- "cortex_a8 specific commands");
+COMMAND_HANDLER(cortex_a8_handle_cache_info_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ struct armv7a_common *armv7a = target_to_armv7a(target);
- register_command(cmd_ctx, cortex_a8_cmd, "cache_info",
- cortex_a8_handle_cache_info_command, COMMAND_EXEC,
- "display information about target caches");
+ return armv4_5_handle_cache_info_command(CMD_CTX,
+ &armv7a->armv4_5_mmu.armv4_5_cache);
+}
- register_command(cmd_ctx, cortex_a8_cmd, "dbginit",
- cortex_a8_handle_dbginit_command, COMMAND_EXEC,
- "Initialize core debug");
- return retval;
+COMMAND_HANDLER(cortex_a8_handle_dbginit_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ if (!target_was_examined(target))
+ {
+ LOG_ERROR("target not examined yet");
+ return ERROR_FAIL;
+ }
+
+ return cortex_a8_init_debug_access(target);
}
+static const struct command_registration cortex_a8_exec_command_handlers[] = {
+ {
+ .name = "cache_info",
+ .handler = cortex_a8_handle_cache_info_command,
+ .mode = COMMAND_EXEC,
+ .help = "display information about target caches",
+ },
+ {
+ .name = "dbginit",
+ .handler = cortex_a8_handle_dbginit_command,
+ .mode = COMMAND_EXEC,
+ .help = "Initialize core debug",
+ },
+ COMMAND_REGISTRATION_DONE
+};
+static const struct command_registration cortex_a8_command_handlers[] = {
+ {
+ .chain = arm_command_handlers,
+ },
+ {
+ .chain = armv7a_command_handlers,
+ },
+ {
+ .name = "cortex_a8",
+ .mode = COMMAND_ANY,
+ .help = "Cortex-A8 command group",
+ .chain = cortex_a8_exec_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
struct target_type cortexa8_target = {
.name = "cortex_a8",
.deassert_reset = cortex_a8_deassert_reset,
.soft_reset_halt = NULL,
- .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
+ /* REVISIT allow exporting VFP3 registers ... */
+ .get_gdb_reg_list = arm_get_gdb_reg_list,
.read_memory = cortex_a8_read_memory,
.write_memory = cortex_a8_write_memory,
.add_watchpoint = NULL,
.remove_watchpoint = NULL,
- .register_commands = cortex_a8_register_commands,
+ .commands = cortex_a8_command_handlers,
.target_create = cortex_a8_target_create,
.init_target = cortex_a8_init_target,
.examine = cortex_a8_examine,
- .mrc = cortex_a8_mrc,
- .mcr = cortex_a8_mcr,
+
+ .read_phys_memory = cortex_a8_read_phys_memory,
+ .write_phys_memory = cortex_a8_write_phys_memory,
+ .mmu = cortex_a8_mmu,
+ .virt2phys = cortex_a8_virt2phys,
+
};
projects / fw / openocd / blobdiff