uint32_t *value, int regnum);
int cortex_a8_dap_write_coreregister_u32(target_t *target,
uint32_t value, int regnum);
+int cortex_a8_assert_reset(target_t *target);
+int cortex_a8_deassert_reset(target_t *target);
target_type_t cortexa8_target =
{
.resume = cortex_a8_resume,
.step = cortex_a8_step,
- .assert_reset = NULL,
- .deassert_reset = NULL,
+ .assert_reset = cortex_a8_assert_reset,
+ .deassert_reset = cortex_a8_deassert_reset,
.soft_reset_halt = NULL,
-// .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
.get_gdb_reg_list = armv4_5_get_gdb_reg_list,
.read_memory = cortex_a8_read_memory,
*/
int cortex_a8_init_debug_access(target_t *target)
{
-#if 0
-# Unlocking the debug registers for modification
-mww 0x54011FB0 0xC5ACCE55 4
-
-# Clear Sticky Power Down status Bit to enable access to
-# the registers in the Core Power Domain
-mdw 0x54011314
-# Check that it is cleared
-mdw 0x54011314
-# Now we can read Core Debug Registers at offset 0x080
-mdw 0x54011080 4
-# We can also read RAM.
-mdw 0x80000000 32
-
-mdw 0x5401d030
-mdw 0x54011FB8
-
-# Set DBGEN line for hardware debug (OMAP35xx)
-mww 0x5401d030 0x00002000
-
-#Check AUTHSTATUS
-mdw 0x54011FB8
-
-# Instr enable
-mww 0x54011088 0x2000
-mdw 0x54011080 4
-#endif
- return ERROR_OK;
+ /* get pointers to arch-specific information */
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ armv7a_common_t *armv7a = armv4_5->arch_info;
+ swjdp_common_t *swjdp = &armv7a->swjdp_info;
+
+ int retval;
+ uint32_t dummy;
+
+ LOG_DEBUG(" ");
+
+ /* Unlocking the debug registers for modification */
+ /* 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);
+ /* 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);
+ /* 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);
+
+ return retval;
}
int cortex_a8_exec_opcode(target_t *target, uint32_t opcode)
{
uint32_t dscr;
- int retvalue;
+ int retval;
/* get pointers to arch-specific information */
armv4_5_common_t *armv4_5 = target->arch_info;
armv7a_common_t *armv7a = armv4_5->arch_info;
LOG_DEBUG("exec opcode 0x%08" PRIx32, opcode);
do
{
- retvalue = mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DSCR, &dscr);
+ retval = mem_ap_read_atomic_u32(swjdp,
+ armv7a->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ {
+ LOG_ERROR("Could not read DSCR register, opcode = 0x%08" PRIx32, opcode);
+ return retval;
+ }
}
- while ((dscr & (1 << 24)) == 0); /* Wait for InstrCompl bit to be set */
+ while ((dscr & (1 << DSCR_INSTR_COMP)) == 0); /* Wait for InstrCompl bit to be set */
- mem_ap_write_u32(swjdp, OMAP3530_DEBUG_BASE + CPUDBG_ITR, opcode);
+ mem_ap_write_u32(swjdp, armv7a->debug_base + CPUDBG_ITR, opcode);
do
{
- retvalue = mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DSCR, &dscr);
+ retval = mem_ap_read_atomic_u32(swjdp,
+ armv7a->debug_base + CPUDBG_DSCR, &dscr);
+ if (retval != ERROR_OK)
+ {
+ LOG_ERROR("Could not read DSCR register");
+ return retval;
+ }
}
- while ((dscr & (1 << 24)) == 0); /* Wait for InstrCompl bit to be set */
+ while ((dscr & (1 << DSCR_INSTR_COMP)) == 0); /* Wait for InstrCompl bit to be set */
- return retvalue;
+ return retval;
}
/**************************************************************************
/* Read DCCTX */
retval = mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DTRTX, value);
+ armv7a->debug_base + CPUDBG_DTRTX, value);
return retval;
}
int cortex_a8_write_cp(target_t *target, uint32_t value,
uint8_t CP, uint8_t op1, uint8_t CRn, uint8_t CRm, uint8_t op2)
-/* TODO Fix this */
{
int retval;
+ uint32_t dscr;
+
/* get pointers to arch-specific information */
armv4_5_common_t *armv4_5 = target->arch_info;
armv7a_common_t *armv7a = armv4_5->arch_info;
swjdp_common_t *swjdp = &armv7a->swjdp_info;
+ LOG_DEBUG("CP%i, CRn %i, value 0x%08" PRIx32, CP, CRn, 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))
+ {
+ 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 = mem_ap_write_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DTRRX, value);
+ armv7a->debug_base + CPUDBG_DTRRX, value);
/* Move DTRRX to r0 */
cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0));
- cortex_a8_exec_opcode(target, ARMV4_5_MCR(CP, 0, 0, 0, 5, 0));
+ cortex_a8_exec_opcode(target, ARMV4_5_MCR(CP, op1, 0, CRn, CRm, op2));
return retval;
}
do
{
retval = mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DSCR, &dscr);
+ armv7a->debug_base + CPUDBG_DSCR, &dscr);
}
- while ((dscr & (1 << 29)) == 0); /* Wait for DTRRXfull */
+ while ((dscr & (1 << DSCR_DTR_TX_FULL)) == 0); /* Wait for DTRRXfull */
retval = mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DTRTX, value);
+ armv7a->debug_base + CPUDBG_DTRTX, value);
return retval;
}
{
int retval = ERROR_OK;
uint8_t Rd = regnum&0xFF;
+ uint32_t dscr;
/* get pointers to arch-specific information */
armv4_5_common_t *armv4_5 = target->arch_info;
armv7a_common_t *armv7a = armv4_5->arch_info;
swjdp_common_t *swjdp = &armv7a->swjdp_info;
+
+ 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))
+ {
+ 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));
+ }
+
if (Rd > 16)
return retval;
/* Write to DCCRX */
retval = mem_ap_write_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DTRRX, value);
+ armv7a->debug_base + CPUDBG_DTRRX, value);
if (Rd < 15)
{
return retval;
}
+/* Write to memory mapped registers directly with no cache or mmu handling */
+int cortex_a8_dap_write_memap_register_u32(target_t *target, uint32_t address, uint32_t value)
+{
+ int retval;
+
+ /* get pointers to arch-specific information */
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ armv7a_common_t *armv7a = armv4_5->arch_info;
+ swjdp_common_t *swjdp = &armv7a->swjdp_info;
+
+ retval = mem_ap_write_atomic_u32(swjdp, address, value);
+
+ return retval;
+}
+
/*
* Cortex-A8 Run control
*/
uint8_t saved_apsel = dap_ap_get_select(swjdp);
dap_ap_select(swjdp, swjdp_debugap);
retval = mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DSCR, &dscr);
+ armv7a->debug_base + CPUDBG_DSCR, &dscr);
if (retval != ERROR_OK)
{
dap_ap_select(swjdp, saved_apsel);
* and then wait for the core to be halted.
*/
retval = mem_ap_write_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DRCR, 0x1);
+ armv7a->debug_base + CPUDBG_DRCR, 0x1);
+
+ /*
+ * 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));
if (retval != ERROR_OK)
goto out;
do {
mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DSCR, &dscr);
- } while ((dscr & (1 << 0)) == 0);
+ armv7a->debug_base + CPUDBG_DSCR, &dscr);
+ } while ((dscr & (1 << DSCR_CORE_HALTED)) == 0);
target->debug_reason = DBG_REASON_DBGRQ;
/* get pointers to arch-specific information */
armv4_5_common_t *armv4_5 = target->arch_info;
armv7a_common_t *armv7a = armv4_5->arch_info;
- cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
swjdp_common_t *swjdp = &armv7a->swjdp_info;
// breakpoint_t *breakpoint = NULL;
/* Make sure that the Armv7 gdb thumb fixups does not
* kill the return address
*/
- if (!(cortex_a8->cpudbg_dscr & (1 << 5)))
+ if (armv7a->core_state == ARMV7A_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)
+ {
+ resume_pc |= 0x1;
+ }
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,
#endif
/* Restart core and wait for it to be started */
- mem_ap_write_atomic_u32(swjdp, OMAP3530_DEBUG_BASE + CPUDBG_DRCR, 0x2);
+ mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_DRCR, 0x2);
do {
mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DSCR, &dscr);
- } while ((dscr & (1 << 1)) == 0);
+ armv7a->debug_base + CPUDBG_DSCR, &dscr);
+ } while ((dscr & (1 << DSCR_CORE_RESTARTED)) == 0);
target->debug_reason = DBG_REASON_NOTHALTED;
target->state = TARGET_RUNNING;
/* Enable the ITR execution once we are in debug mode */
mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DSCR, &dscr);
- dscr |= (1 << 13);
+ armv7a->debug_base + CPUDBG_DSCR, &dscr);
+ dscr |= (1 << DSCR_EXT_INT_EN);
retval = mem_ap_write_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DSCR, dscr);
-
+ armv7a->debug_base + CPUDBG_DSCR, dscr);
/* Examine debug reason */
switch ((cortex_a8->cpudbg_dscr >> 2)&0xF)
dap_ap_select(swjdp, swjdp_debugap);
LOG_DEBUG("cpsr: %8.8" PRIx32, cpsr);
- armv4_5->core_mode = cpsr & 0x3F;
+ armv4_5->core_mode = cpsr & 0x1F;
+ armv7a->core_state = (cpsr & 0x20)?ARMV7A_STATE_THUMB:ARMV7A_STATE_ARM;
for (i = 0; i <= ARM_PC; i++)
{
ARMV7A_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).dirty = 0;
/* Fixup PC Resume Address */
- /* TODO Her we should use arch->core_state */
- if (cortex_a8->cpudbg_dscr & (1 << 5))
+ if (armv7a->core_state == ARMV7A_STATE_THUMB)
{
// T bit set for Thumb or ThumbEE state
regfile[ARM_PC] -= 4;
/* get pointers to arch-specific information */
armv4_5_common_t *armv4_5 = target->arch_info;
armv7a_common_t *armv7a = armv4_5->arch_info;
- cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
breakpoint_t *breakpoint = NULL;
breakpoint_t stepbreakpoint;
/* Setup single step breakpoint */
stepbreakpoint.address = address;
- stepbreakpoint.length = (cortex_a8->cpudbg_dscr & (1 << 5)) ? 2 : 4;
+ stepbreakpoint.length = (armv7a->core_state == ARMV7A_STATE_THUMB) ? 2 : 4;
stepbreakpoint.type = BKPT_HARD;
stepbreakpoint.set = 0;
brp_list[brp_i].used = 1;
brp_list[brp_i].value = (breakpoint->address & 0xFFFFFFFC);
brp_list[brp_i].control = control;
- target_write_u32(target, OMAP3530_DEBUG_BASE
+ 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);
- target_write_u32(target, OMAP3530_DEBUG_BASE
+ 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);
LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_i,
brp_list[brp_i].used = 0;
brp_list[brp_i].value = 0;
brp_list[brp_i].control = 0;
- target_write_u32(target, OMAP3530_DEBUG_BASE
+ 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);
- target_write_u32(target, OMAP3530_DEBUG_BASE
+ 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 Reset fuctions
*/
+int cortex_a8_assert_reset(target_t *target)
+{
+
+ LOG_DEBUG(" ");
+
+ /* registers are now invalid */
+ armv4_5_invalidate_core_regs(target);
+
+ target->state = TARGET_RESET;
+
+ return ERROR_OK;
+}
+
+int cortex_a8_deassert_reset(target_t *target)
+{
+
+ LOG_DEBUG(" ");
+
+ if (target->reset_halt)
+ {
+ int retval;
+ if ((retval = target_halt(target)) != ERROR_OK)
+ return retval;
+ }
+
+ return ERROR_OK;
+}
/*
* Cortex-A8 Memory access
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 */
+ }
+ }
+
return retval;
}
uint32_t didr, ctypr, ttypr, cpuid;
LOG_DEBUG("TODO");
+
+ /* 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, OMAP3530_DEBUG_BASE + CPUDBG_CPUID, &cpuid);
+ mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_CPUID, &cpuid);
if ((retval = mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_CPUID, &cpuid)) != ERROR_OK)
+ armv7a->debug_base + CPUDBG_CPUID, &cpuid)) != ERROR_OK)
{
LOG_DEBUG("Examine failed");
return retval;
}
if ((retval = mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_CTYPR, &ctypr)) != ERROR_OK)
+ armv7a->debug_base + CPUDBG_CTYPR, &ctypr)) != ERROR_OK)
{
LOG_DEBUG("Examine failed");
return retval;
}
if ((retval = mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_TTYPR, &ttypr)) != ERROR_OK)
+ armv7a->debug_base + CPUDBG_TTYPR, &ttypr)) != ERROR_OK)
{
LOG_DEBUG("Examine failed");
return retval;
}
if ((retval = mem_ap_read_atomic_u32(swjdp,
- OMAP3530_DEBUG_BASE + CPUDBG_DIDR, &didr)) != ERROR_OK)
+ armv7a->debug_base + CPUDBG_DIDR, &didr)) != ERROR_OK)
{
LOG_DEBUG("Examine failed");
return retval;
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);
+
target->type->examined = 1;
return retval;
}
+static int cortex_a8_handle_dbginit_command(struct command_context_s *cmd_ctx,
+ char *cmd, char **args, int argc)
+{
+ target_t *target = get_current_target(cmd_ctx);
+
+ cortex_a8_init_debug_access(target);
+
+ return ERROR_OK;
+}
+
+
int cortex_a8_register_commands(struct command_context_s *cmd_ctx)
{
command_t *cortex_a8_cmd;
cortex_a8_handle_cache_info_command, COMMAND_EXEC,
"display information about target caches");
+ register_command(cmd_ctx, cortex_a8_cmd, "dbginit",
+ cortex_a8_handle_dbginit_command, COMMAND_EXEC,
+ "Initialize core debug");
+
return retval;
}
projects / fw / openocd / blobdiff