#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 <helper/time_support.h>
+
+/* 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)
-/* cli handling */
-int cortex_m3_register_commands(struct command_context_s *cmd_ctx);
-int handle_cortex_m3_mask_interrupts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
/* forward declarations */
-void cortex_m3_enable_breakpoints(struct target_s *target);
-void cortex_m3_enable_watchpoints(struct target_s *target);
-int cortex_m3_target_create(struct target_s *target, Jim_Interp *interp);
-int cortex_m3_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
-int cortex_m3_quit(void);
-int cortex_m3_load_core_reg_u32(target_t *target, enum armv7m_regtype type, uint32_t num, uint32_t *value);
-int cortex_m3_store_core_reg_u32(target_t *target, enum armv7m_regtype type, uint32_t num, uint32_t value);
-int cortex_m3_target_request_data(target_t *target, uint32_t size, uint8_t *buffer);
-int cortex_m3_examine(struct target_s *target);
-
-#ifdef ARMV7_GDB_HACKS
-extern uint8_t armv7m_gdb_dummy_cpsr_value[];
-extern reg_t armv7m_gdb_dummy_cpsr_reg;
-#endif
-
-target_type_t 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,
-
- .add_breakpoint = cortex_m3_add_breakpoint,
- .remove_breakpoint = cortex_m3_remove_breakpoint,
- .add_watchpoint = cortex_m3_add_watchpoint,
- .remove_watchpoint = cortex_m3_remove_watchpoint,
-
- .register_commands = cortex_m3_register_commands,
- .target_create = cortex_m3_target_create,
- .init_target = cortex_m3_init_target,
- .examine = cortex_m3_examine,
- .quit = cortex_m3_quit
-};
-
-int cortexm3_dap_read_coreregister_u32(swjdp_common_t *swjdp, uint32_t *value, int regnum)
+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 gave to save/restore the DCB_DCRDR when used */
-
- mem_ap_read_u32(swjdp, DCB_DCRDR, &dcrdr);
+ * we have to save/restore the DCB_DCRDR when used */
- swjdp->trans_mode = TRANS_MODE_COMPOSITE;
+ retval = mem_ap_read_u32(swjdp, DCB_DCRDR, &dcrdr);
+ if (retval != ERROR_OK)
+ return retval;
/* mem_ap_write_u32(swjdp, DCB_DCRSR, regnum); */
- dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRSR & 0xFFFFFFF0);
- dap_ap_write_reg_u32(swjdp, AP_REG_BD0 | (DCB_DCRSR & 0xC), 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); */
- dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRDR & 0xFFFFFFF0);
- dap_ap_read_reg_u32(swjdp, AP_REG_BD0 | (DCB_DCRDR & 0xC), 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);
- mem_ap_write_u32(swjdp, DCB_DCRDR, dcrdr);
- retval = swjdp_transaction_endcheck(swjdp);
return retval;
}
-int cortexm3_dap_write_coreregister_u32(swjdp_common_t *swjdp, uint32_t value, int regnum)
+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 gave to save/restore the DCB_DCRDR when used */
+ * we have to save/restore the DCB_DCRDR when used */
- mem_ap_read_u32(swjdp, DCB_DCRDR, &dcrdr);
-
- swjdp->trans_mode = TRANS_MODE_COMPOSITE;
+ 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]); */
- dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRDR & 0xFFFFFFF0);
- dap_ap_write_reg_u32(swjdp, AP_REG_BD0 | (DCB_DCRDR & 0xC), value);
+ 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); */
- dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRSR & 0xFFFFFFF0);
- dap_ap_write_reg_u32(swjdp, AP_REG_BD0 | (DCB_DCRSR & 0xC), regnum | 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);
- mem_ap_write_u32(swjdp, DCB_DCRDR, dcrdr);
- retval = swjdp_transaction_endcheck(swjdp);
return retval;
}
-
-int cortex_m3_write_debug_halt_mask(target_t *target, uint32_t mask_on, uint32_t mask_off)
+static int cortex_m3_write_debug_halt_mask(struct target *target,
+ uint32_t mask_on, uint32_t mask_off)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ 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);
return mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, cortex_m3->dcb_dhcsr);
}
-int cortex_m3_clear_halt(target_t *target)
+static int cortex_m3_clear_halt(struct target *target)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ 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 */
- mem_ap_read_atomic_u32(swjdp, NVIC_DFSR, &cortex_m3->nvic_dfsr);
- /* Write Debug Fault Status Register to enable processing to resume ?? Try with and without this !! */
- mem_ap_write_atomic_u32(swjdp, NVIC_DFSR, cortex_m3->nvic_dfsr);
+ 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;
}
-int cortex_m3_single_step_core(target_t *target)
+static int cortex_m3_single_step_core(struct target *target)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ 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 if not done already */
+ /* 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))
- mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, DBGKEY | C_MASKINTS | C_HALT | C_DEBUGEN);
- mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, DBGKEY | C_MASKINTS | C_STEP | C_DEBUGEN);
+ {
+ 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 */
return ERROR_OK;
}
-int cortex_m3_exec_opcode(target_t *target,uint32_t opcode, int len /* MODE, r0_invalue, &r0_outvalue */)
-{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
- uint32_t savedram;
- int retvalue;
-
- mem_ap_read_u32(swjdp, 0x20000000, &savedram);
- mem_ap_write_u32(swjdp, 0x20000000, opcode);
- cortexm3_dap_write_coreregister_u32(swjdp, 0x20000000, 15);
- cortex_m3_single_step_core(target);
- armv7m->core_cache->reg_list[15].dirty = armv7m->core_cache->reg_list[15].valid;
- retvalue = mem_ap_write_atomic_u32(swjdp, 0x20000000, savedram);
-
- return retvalue;
-}
-
-#if 0
-/* Enable interrupts */
-int cortex_m3_cpsie(target_t *target, uint32_t IF)
-{
- return cortex_m3_exec_opcode(target, ARMV7M_T_CPSIE(IF), 2);
-}
-
-/* Disable interrupts */
-int cortex_m3_cpsid(target_t *target, uint32_t IF)
-{
- return cortex_m3_exec_opcode(target, ARMV7M_T_CPSID(IF), 2);
-}
-#endif
-
-int cortex_m3_endreset_event(target_t *target)
+static int cortex_m3_endreset_event(struct target *target)
{
int i;
+ int retval;
uint32_t dcb_demcr;
-
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
- cortex_m3_fp_comparator_t *fp_list = cortex_m3->fp_comparator_list;
- cortex_m3_dwt_comparator_t *dwt_list = cortex_m3->dwt_comparator_list;
-
- mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &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 regsiter is used for emulated dcc channel */
- mem_ap_write_u32(swjdp, DCB_DCRDR, 0);
+ /* 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 */
- mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
+ 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))
- mem_ap_write_u32(swjdp, DCB_DHCSR, DBGKEY | 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 trace and dwt */
- mem_ap_write_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR);
- /* Monitor bus faults */
- mem_ap_write_u32(swjdp, NVIC_SHCSR, SHCSR_BUSFAULTENA);
+ /* 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 */
- target_write_u32(target, FP_CTRL, 3);
+ 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++)
{
- target_write_u32(target, fp_list[i].fpcr_address, fp_list[i].fpcr_value);
+ 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++)
{
- target_write_u32(target, dwt_list[i].dwt_comparator_address, dwt_list[i].comp);
- target_write_u32(target, dwt_list[i].dwt_comparator_address | 0x4, dwt_list[i].mask);
- target_write_u32(target, dwt_list[i].dwt_comparator_address | 0x8, dwt_list[i].function);
+ 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;
}
- swjdp_transaction_endcheck(swjdp);
+ retval = dap_run(swjdp);
+ if (retval != ERROR_OK)
+ return retval;
- armv7m_invalidate_core_regs(target);
+ register_cache_invalidate(cortex_m3->armv7m.core_cache);
/* make sure we have latest dhcsr flags */
- mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
+ retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
- return ERROR_OK;
+ return retval;
}
-int cortex_m3_examine_debug_reason(target_t *target)
+static int cortex_m3_examine_debug_reason(struct target *target)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+ 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))
{
- /* INCOMPLETE */
-
if (cortex_m3->nvic_dfsr & DFSR_BKPT)
{
target->debug_reason = DBG_REASON_BREAKPOINT;
}
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;
}
-int cortex_m3_examine_exception_reason(target_t *target)
+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;
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
-
- mem_ap_read_u32(swjdp, NVIC_SHCSR, &shcsr);
+ 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 */
- mem_ap_read_atomic_u32(swjdp, NVIC_HFSR, &except_sr);
+ retval = mem_ap_read_atomic_u32(swjdp, NVIC_HFSR, &except_sr);
+ if (retval != ERROR_OK)
+ return retval;
if (except_sr & 0x40000000)
{
- mem_ap_read_u32(swjdp, NVIC_CFSR, &cfsr);
+ retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &cfsr);
+ if (retval != ERROR_OK)
+ return retval;
}
break;
case 4: /* Memory Management */
- mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr);
- mem_ap_read_u32(swjdp, NVIC_MMFAR, &except_ar);
+ 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 */
- mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr);
- mem_ap_read_u32(swjdp, NVIC_BFAR, &except_ar);
+ 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 */
- mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr);
+ 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 */
- mem_ap_read_u32(swjdp, NVIC_DFSR, &except_sr);
+ retval = mem_ap_read_u32(swjdp, NVIC_DFSR, &except_sr);
+ if (retval != ERROR_OK)
+ return retval;
break;
case 14: /* PendSV */
break;
except_sr = 0;
break;
}
- swjdp_transaction_endcheck(swjdp);
- 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 ERROR_OK;
+ 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;
}
-int cortex_m3_debug_entry(target_t *target)
+/* 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;
-
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ 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(" ");
- if (armv7m->pre_debug_entry)
- armv7m->pre_debug_entry(target);
cortex_m3_clear_halt(target);
- mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
+ 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*/
- for (i = 0; i < ARMV7NUMCOREREGS; i++)
+ 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);
}
- xPSR = buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32);
+ 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 = armv7m->core_cache->reg_list[ARMV7M_xPSR].valid;
- armv7m_gdb_dummy_cpsr_reg.dirty = armv7m->core_cache->reg_list[ARMV7M_xPSR].dirty;
+ 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)
{
- armv7m->core_cache->reg_list[ARMV7M_xPSR].dirty = armv7m->core_cache->reg_list[ARMV7M_xPSR].valid;
+ r->dirty = r->valid;
cortex_m3_store_core_reg_u32(target, ARMV7M_REGISTER_CORE_GP, 16, xPSR &~ 0xff);
}
{
armv7m->core_mode = ARMV7M_MODE_HANDLER;
armv7m->exception_number = (xPSR & 0x1FF);
+
+ arm->core_mode = ARM_MODE_HANDLER;
+ arm->map = armv7m_msp_reg_map;
}
- else if (armv7m->has_spec20)
+ else
{
- /* NOTE: CONTROL is bits 31:24 of SPEC20 register, holding
- * a two-bit field. Unavailable before r2p0...
- */
- armv7m->core_mode = buf_get_u32(
- armv7m->core_cache->reg_list[ARMV7M_SPEC20].value, 24, 2);
+ 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;
}
LOG_DEBUG("entered debug state in core mode: %s at PC 0x%" PRIx32 ", target->state: %s",
armv7m_mode_strings[armv7m->core_mode],
- *(uint32_t*)(armv7m->core_cache->reg_list[15].value),
+ *(uint32_t*)(arm->pc->value),
target_state_name(target));
if (armv7m->post_debug_entry)
- armv7m->post_debug_entry(target);
+ {
+ retval = armv7m->post_debug_entry(target);
+ if (retval != ERROR_OK)
+ return retval;
+ }
return ERROR_OK;
}
-int cortex_m3_poll(target_t *target)
+static int cortex_m3_poll(struct target *target)
{
- int retval;
+ int detected_failure = ERROR_OK;
+ int retval = ERROR_OK;
enum target_state prev_target_state = target->state;
-
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ 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);
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 */
- mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
+ 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)
{
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);
+ /* 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 ((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)
if (cortex_m3->dcb_dhcsr & S_RETIRE_ST)
{
target->state = TARGET_RUNNING;
- return ERROR_OK;
+ retval = ERROR_OK;
}
}
- return ERROR_OK;
+ /* Did we detect a failure condition that we cleared? */
+ if (detected_failure != ERROR_OK)
+ retval = detected_failure;
+ return retval;
}
-int cortex_m3_halt(target_t *target)
+static int cortex_m3_halt(struct target *target)
{
LOG_DEBUG("target->state: %s",
target_state_name(target));
return ERROR_OK;
}
-int cortex_m3_soft_reset_halt(struct target_s *target)
+static int cortex_m3_soft_reset_halt(struct target *target)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ 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, cf. end_reset_event() */
- mem_ap_write_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET);
+ /* 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 reset */
- mem_ap_write_atomic_u32(swjdp, NVIC_AIRCR, AIRCR_VECTKEY | AIRCR_VECTRESET);
+ /* 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 */
- armv7m_invalidate_core_regs(target);
+ 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)
{
- mem_ap_read_atomic_u32(swjdp, NVIC_DFSR, &cortex_m3->nvic_dfsr);
- if ((dcb_dhcsr & S_HALT) && (cortex_m3->nvic_dfsr & DFSR_VCATCH))
+ 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, dcb_dhcsr 0x%" PRIx32 ", nvic_dfsr 0x%" PRIx32 "", dcb_dhcsr, cortex_m3->nvic_dfsr);
+ 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, dcb_dhcsr 0x%" PRIx32 ", %i ms", dcb_dhcsr, timeout);
+ LOG_DEBUG("waiting for system reset-halt, "
+ "DHCSR 0x%08x, %d ms",
+ (unsigned) dcb_dhcsr, timeout);
}
timeout++;
alive_sleep(1);
return ERROR_OK;
}
-int cortex_m3_resume(struct target_s *target, int current, uint32_t address, int handle_breakpoints, int debug_execution)
+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)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- breakpoint_t *breakpoint = NULL;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct breakpoint *breakpoint = NULL;
uint32_t resume_pc;
+ struct reg *r;
if (target->state != TARGET_HALTED)
{
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 Errata 377493:
- * C_MASKINTS in parallel with disabled interrupts can cause
- * local faults to not be taken. (FIXED in r1p0 and later.)
+ /* 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.
*
- * NOTE: PRIMASK is bits 7:0 of SPEC20 register, holding a
- * one bit field. Available this way for r2p0 and later...
+ * 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.
*/
- if (armv7m->has_spec20) {
- buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_SPEC20]
- .value, 0, 1, 1);
- armv7m->core_cache->reg_list[ARMV7M_SPEC20].dirty = 1;
- armv7m->core_cache->reg_list[ARMV7M_SPEC20].valid = 1;
- }
+ buf_set_u32(r->value, 0, 1, 1);
+ r->dirty = true;
+ r->valid = true;
/* Make sure we are in Thumb mode */
- buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32,
- buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32)
- | (1 << 24));
- armv7m->core_cache->reg_list[ARMV7M_xPSR].dirty = 1;
- armv7m->core_cache->reg_list[ARMV7M_xPSR].valid = 1;
+ 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 <address> */
+ r = armv7m->arm.pc;
if (!current)
{
- buf_set_u32(armv7m->core_cache->reg_list[15].value, 0, 32, address);
- armv7m->core_cache->reg_list[15].dirty = 1;
- armv7m->core_cache->reg_list[15].valid = 1;
+ buf_set_u32(r->value, 0, 32, address);
+ r->dirty = true;
+ r->valid = true;
}
- resume_pc = buf_get_u32(armv7m->core_cache->reg_list[15].value, 0, 32);
+ /* 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);
/* 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)",
+ LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32 " (ID: %d)",
breakpoint->address,
- breakpoint->unique_id );
+ breakpoint->unique_id);
cortex_m3_unset_breakpoint(target, breakpoint);
cortex_m3_single_step_core(target);
cortex_m3_set_breakpoint(target, breakpoint);
target->debug_reason = DBG_REASON_NOTHALTED;
/* registers are now invalid */
- armv7m_invalidate_core_regs(target);
+ register_cache_invalidate(armv7m->core_cache);
+
if (!debug_execution)
{
target->state = TARGET_RUNNING;
}
/* int irqstepcount = 0; */
-int cortex_m3_step(struct target_s *target, int current, uint32_t address, int handle_breakpoints)
+static int cortex_m3_step(struct target *target, int current,
+ uint32_t address, int handle_breakpoints)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
- breakpoint_t *breakpoint = NULL;
+ 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)
{
/* current = 1: continue on current pc, otherwise continue at <address> */
if (!current)
- buf_set_u32(armv7m->core_cache->reg_list[15].value, 0, 32, address);
+ 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)
- if ((breakpoint = breakpoint_find(target, buf_get_u32(armv7m->core_cache->reg_list[15].value, 0, 32))))
+ 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;
target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
- /* set step and clear halt */
- cortex_m3_write_debug_halt_mask(target, C_STEP, C_HALT);
- mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
+ /* 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 */
- armv7m_invalidate_core_regs(target);
+ register_cache_invalidate(cortex_m3->armv7m.core_cache);
if (breakpoint)
cortex_m3_set_breakpoint(target, breakpoint);
- LOG_DEBUG("target stepped dcb_dhcsr = 0x%" PRIx32 " nvic_icsr = 0x%" PRIx32 "", cortex_m3->dcb_dhcsr, cortex_m3->nvic_icsr);
+ 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;
+ }
- cortex_m3_debug_entry(target);
+ 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);
+ LOG_DEBUG("target stepped dcb_dhcsr = 0x%" PRIx32
+ " nvic_icsr = 0x%" PRIx32,
+ cortex_m3->dcb_dhcsr, cortex_m3->nvic_icsr);
+
return ERROR_OK;
}
-int cortex_m3_assert_reset(target_t *target)
+static int cortex_m3_assert_reset(struct target *target)
{
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
- int assert_srst = 1;
+ 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 (!(jtag_reset_config & RESET_HAS_SRST))
- {
- LOG_ERROR("Can't assert SRST");
- return ERROR_FAIL;
+
+ 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 */
- mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
+ 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))
- mem_ap_write_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN);
+ {
+ retval = mem_ap_write_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN);
+ if (retval != ERROR_OK)
+ return retval;
+ }
- mem_ap_write_u32(swjdp, DCB_DCRDR, 0);
+ 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)
- mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN | C_HALT);
+ {
+ 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);
-
- /* Enter debug state on reset, cf. end_reset_event() */
- mem_ap_write_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR);
}
else
{
- /* Enter debug state on reset, cf. end_reset_event() */
- mem_ap_write_atomic_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET);
- }
-
- /* following hack is to handle luminary reset
- * when srst is asserted the luminary device seesm to also clear the debug registers
- * which does not match the armv7 debug TRM */
-
- if (strcmp(target->variant, "lm3s") == 0)
- {
- /* get revision of lm3s target, only early silicon has this issue
- * Fury Rev B, DustDevil Rev B, Tempest all ok */
-
- uint32_t did0;
-
- if (target_read_u32(target, 0x400fe000, &did0) == ERROR_OK)
- {
- switch ((did0 >> 16) & 0xff)
- {
- case 0:
- /* all Sandstorm suffer issue */
- assert_srst = 0;
- break;
-
- case 1:
- case 3:
- /* only Fury/DustDevil rev A suffer reset problems */
- if (((did0 >> 8) & 0xff) == 0)
- assert_srst = 0;
- break;
- }
- }
+ /* 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 (assert_srst)
+ if (jtag_reset_config & RESET_HAS_SRST)
{
/* default to asserting srst */
if (jtag_reset_config & RESET_SRST_PULLS_TRST)
}
else
{
- /* this causes the luminary device to reset using the watchdog */
- mem_ap_write_atomic_u32(swjdp, NVIC_AIRCR, AIRCR_VECTKEY | AIRCR_SYSRESETREQ);
- LOG_DEBUG("Using Luminary Reset: SYSRESETREQ");
+ /* 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 a NMI after reset) on LM3S6918 -- Michael Schwingen */
+ /* 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;
- mem_ap_read_atomic_u32(swjdp, NVIC_AIRCR, &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);
- armv7m_invalidate_core_regs(target);
+ register_cache_invalidate(cortex_m3->armv7m.core_cache);
if (target->reset_halt)
{
- int retval;
if ((retval = target_halt(target)) != ERROR_OK)
return retval;
}
return ERROR_OK;
}
-int cortex_m3_deassert_reset(target_t *target)
+static int cortex_m3_deassert_reset(struct target *target)
{
LOG_DEBUG("target->state: %s",
target_state_name(target));
return ERROR_OK;
}
-void cortex_m3_enable_breakpoints(struct target_s *target)
-{
- breakpoint_t *breakpoint = target->breakpoints;
-
- /* set any pending breakpoints */
- while (breakpoint)
- {
- if (breakpoint->set == 0)
- cortex_m3_set_breakpoint(target, breakpoint);
- breakpoint = breakpoint->next;
- }
-}
-
-int cortex_m3_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+static int
+cortex_m3_set_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
int retval;
int fp_num = 0;
uint32_t hilo;
-
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-
- cortex_m3_fp_comparator_t * comparator_list = cortex_m3->fp_comparator_list;
+ 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)
{
if (cortex_m3->auto_bp_type)
{
- breakpoint->type = (breakpoint->address < 0x20000000) ? BKPT_HARD : BKPT_SOFT;
+ breakpoint->type = BKPT_TYPE_BY_ADDR(breakpoint->address);
}
if (breakpoint->type == BKPT_HARD)
fp_num++;
if (fp_num >= cortex_m3->fp_num_code)
{
- LOG_DEBUG("ERROR Can not find free FP Comparator");
- LOG_WARNING("ERROR Can not find free FP Comparator");
- exit(-1);
+ 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;
else if (breakpoint->type == BKPT_SOFT)
{
uint8_t code[4];
- buf_set_u32(code, 0, 32, ARMV7M_T_BKPT(0x11));
- if ((retval = target_read_memory(target, breakpoint->address & 0xFFFFFFFE, breakpoint->length, 1, breakpoint->orig_instr)) != ERROR_OK)
- {
+
+ /* 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;
- }
- if ((retval = target_write_memory(target, breakpoint->address & 0xFFFFFFFE, breakpoint->length, 1, code)) != ERROR_OK)
- {
+ retval = target_write_memory(target,
+ breakpoint->address & 0xFFFFFFFE,
+ breakpoint->length, 1,
+ code);
+ if (retval != ERROR_OK)
return retval;
- }
- breakpoint->set = 0x11; /* Any nice value but 0 */
+ breakpoint->set = true;
}
- LOG_DEBUG("BPID: %d, Type: %d, Address: 0x%08" PRIx32 " Length: %d (set=%d)",
+ LOG_DEBUG("BPID: %d, Type: %d, Address: 0x%08" PRIx32 " Length: %d (set=%d)",
breakpoint->unique_id,
(int)(breakpoint->type),
breakpoint->address,
return ERROR_OK;
}
-int cortex_m3_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+static int
+cortex_m3_unset_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
int retval;
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- cortex_m3_fp_comparator_t * comparator_list = cortex_m3->fp_comparator_list;
+ 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)
{
return ERROR_OK;
}
- LOG_DEBUG("BPID: %d, Type: %d, Address: 0x%08" PRIx32 " Length: %d (set=%d)",
+ LOG_DEBUG("BPID: %d, Type: %d, Address: 0x%08" PRIx32 " Length: %d (set=%d)",
breakpoint->unique_id,
(int)(breakpoint->type),
breakpoint->address,
}
}
}
- breakpoint->set = 0;
+ breakpoint->set = false;
return ERROR_OK;
}
-int cortex_m3_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+static int
+cortex_m3_add_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
if (cortex_m3->auto_bp_type)
{
- breakpoint->type = (breakpoint->address < 0x20000000) ? BKPT_HARD : BKPT_SOFT;
+ 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
#endif
}
- if ((breakpoint->type == BKPT_HARD) && (breakpoint->address >= 0x20000000))
- {
- LOG_INFO("flash patch comparator requested outside code memory region");
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
+ 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) && (breakpoint->address < 0x20000000))
- {
- LOG_INFO("soft breakpoint requested in code (flash) 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))
if (breakpoint->type == BKPT_HARD)
cortex_m3->fp_code_available--;
- cortex_m3_set_breakpoint(target, breakpoint);
- return ERROR_OK;
+ return cortex_m3_set_breakpoint(target, breakpoint);
}
-int cortex_m3_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+static int
+cortex_m3_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+ 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");
if (cortex_m3->auto_bp_type)
{
- breakpoint->type = (breakpoint->address < 0x20000000) ? BKPT_HARD : BKPT_SOFT;
+ breakpoint->type = BKPT_TYPE_BY_ADDR(breakpoint->address);
}
if (breakpoint->set)
return ERROR_OK;
}
-int cortex_m3_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+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);
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- cortex_m3_dwt_comparator_t * comparator_list = cortex_m3->dwt_comparator_list;
-
- if (watchpoint->set)
- {
- LOG_WARNING("watchpoint (%d) already set", watchpoint->unique_id );
- return ERROR_OK;
+ /* watchpoint params were validated earlier */
+ mask = 0;
+ temp = watchpoint->length;
+ while (temp) {
+ temp >>= 1;
+ mask++;
}
+ mask--;
- if (watchpoint->mask == 0xffffffffu)
- {
- while (comparator_list[dwt_num].used && (dwt_num < cortex_m3->dwt_num_comp))
- dwt_num++;
- if (dwt_num >= cortex_m3->dwt_num_comp)
- {
- LOG_DEBUG("ERROR Can not find free DWT Comparator");
- LOG_WARNING("ERROR Can not find free DWT Comparator");
- return -1;
- }
- watchpoint->set = dwt_num + 1;
- mask = 0;
- temp = watchpoint->length;
- while (temp > 1)
- {
- temp = temp / 2;
- mask++;
- }
- comparator_list[dwt_num].used = 1;
- comparator_list[dwt_num].comp = watchpoint->address;
- comparator_list[dwt_num].mask = mask;
- comparator_list[dwt_num].function = watchpoint->rw + 5;
- target_write_u32(target, comparator_list[dwt_num].dwt_comparator_address, comparator_list[dwt_num].comp);
- target_write_u32(target, comparator_list[dwt_num].dwt_comparator_address | 0x4, comparator_list[dwt_num].mask);
- target_write_u32(target, comparator_list[dwt_num].dwt_comparator_address | 0x8, comparator_list[dwt_num].function);
- LOG_DEBUG("dwt_num %i 0x%" PRIx32 " 0x%" PRIx32 " 0x%" PRIx32 "", dwt_num, comparator_list[dwt_num].comp, comparator_list[dwt_num].mask, comparator_list[dwt_num].function);
- }
- else
+ /* 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)
{
- /* Move this test to add_watchpoint */
- LOG_WARNING("Cannot watch data values (id: %d)",
- watchpoint->unique_id );
- return ERROR_OK;
+ LOG_ERROR("Can not find free DWT Comparator");
+ return ERROR_FAIL;
}
- LOG_DEBUG("Watchpoint (ID: %d) address: 0x%08" PRIx32 " set=%d ",
- watchpoint->unique_id, watchpoint->address, watchpoint->set );
+ 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;
-
}
-int cortex_m3_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+static int
+cortex_m3_unset_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- cortex_m3_dwt_comparator_t * comparator_list = cortex_m3->dwt_comparator_list;
+ 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 );
+ LOG_WARNING("watchpoint (wpid: %d) not set",
+ watchpoint->unique_id);
return ERROR_OK;
}
- LOG_DEBUG("Watchpoint (ID: %d) address: 0x%08" PRIx32 " set=%d ",
- watchpoint->unique_id, watchpoint->address,watchpoint->set );
-
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_list[dwt_num].used = 0;
- comparator_list[dwt_num].function = 0;
- target_write_u32(target, comparator_list[dwt_num].dwt_comparator_address | 0x8, comparator_list[dwt_num].function);
- watchpoint->set = 0;
+ 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;
}
-int cortex_m3_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+static int
+cortex_m3_add_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
- if (target->state != TARGET_HALTED)
+ if (cortex_m3->dwt_comp_available < 1)
{
- LOG_WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
+ LOG_DEBUG("no comparators?");
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
- if (cortex_m3->dwt_comp_available < 1)
- {
+ /* 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;
}
- if ((watchpoint->length != 1) && (watchpoint->length != 2) && (watchpoint->length != 4))
- {
+ /* 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;
}
return ERROR_OK;
}
-int cortex_m3_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+static int
+cortex_m3_remove_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+ 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_OK;
}
-void cortex_m3_enable_watchpoints(struct target_s *target)
+static void cortex_m3_enable_watchpoints(struct target *target)
{
- watchpoint_t *watchpoint = target->watchpoints;
+ struct watchpoint *watchpoint = target->watchpoints;
/* set any pending watchpoints */
while (watchpoint)
{
- if (watchpoint->set == 0)
+ if (!watchpoint->set)
cortex_m3_set_watchpoint(target, watchpoint);
watchpoint = watchpoint->next;
}
}
-int cortex_m3_load_core_reg_u32(struct target_s *target, enum armv7m_regtype type, uint32_t num, uint32_t * value)
+static int cortex_m3_load_core_reg_u32(struct target *target,
+ enum armv7m_regtype type, uint32_t num, uint32_t * value)
{
int retval;
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct adiv5_dap *swjdp = &armv7m->dap;
- if ((type == ARMV7M_REGISTER_CORE_GP) && (num <= ARMV7M_PSP))
- {
+ /* 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);
return ERROR_JTAG_DEVICE_ERROR;
}
LOG_DEBUG("load from core reg %i value 0x%" PRIx32 "",(int)num,*value);
- }
- else if (type == ARMV7M_REGISTER_CORE_SP) /* Special purpose core register */
- {
- /* read other registers */
+ 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 19:
- *value = buf_get_u32((uint8_t*)value, 0, 8);
+ case ARMV7M_PRIMASK:
+ *value = buf_get_u32((uint8_t*)value, 0, 1);
break;
- case 20:
+ case ARMV7M_BASEPRI:
*value = buf_get_u32((uint8_t*)value, 8, 8);
break;
- case 21:
- *value = buf_get_u32((uint8_t*)value, 16, 8);
+ case ARMV7M_FAULTMASK:
+ *value = buf_get_u32((uint8_t*)value, 16, 1);
break;
- case 22:
- *value = buf_get_u32((uint8_t*)value, 24, 8);
+ 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);
- }
- else
- {
+ break;
+
+ default:
return ERROR_INVALID_ARGUMENTS;
}
return ERROR_OK;
}
-int cortex_m3_store_core_reg_u32(struct target_s *target, enum armv7m_regtype type, uint32_t num, uint32_t value)
+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;
-
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ 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.) */
-
- if (num == 14)
+ * 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
- if ((type == ARMV7M_REGISTER_CORE_GP) && (num <= ARMV7M_PSP))
- {
+ /* 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)
{
- LOG_ERROR("JTAG failure %i", retval);
- armv7m->core_cache->reg_list[num].dirty = armv7m->core_cache->reg_list[num].valid;
+ 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);
- }
- else if (type == ARMV7M_REGISTER_CORE_SP) /* Special purpose core register */
- {
- /* write other registers */
-
+ 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 19:
- buf_set_u32((uint8_t*)®, 0, 8, value);
+ case ARMV7M_PRIMASK:
+ buf_set_u32((uint8_t*)®, 0, 1, value);
break;
- case 20:
+ case ARMV7M_BASEPRI:
buf_set_u32((uint8_t*)®, 8, 8, value);
break;
- case 21:
- buf_set_u32((uint8_t*)®, 16, 8, value);
+ case ARMV7M_FAULTMASK:
+ buf_set_u32((uint8_t*)®, 16, 1, value);
break;
- case 22:
- buf_set_u32((uint8_t*)®, 24, 8, value);
+ 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);
- }
- else
- {
+ break;
+
+ default:
return ERROR_INVALID_ARGUMENTS;
}
return ERROR_OK;
}
-int cortex_m3_read_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+static int cortex_m3_read_memory(struct target *target, uint32_t address,
+ uint32_t size, uint32_t count, uint8_t *buffer)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
- int retval;
-
- /* sanitize arguments */
- if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
- return ERROR_INVALID_ARGUMENTS;
+ 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 */
-
- switch (size)
- {
+ if (count && buffer) {
+ switch (size) {
case 4:
retval = mem_ap_read_buf_u32(swjdp, buffer, 4 * 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;
}
-int cortex_m3_write_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+static int cortex_m3_write_memory(struct target *target, uint32_t address,
+ uint32_t size, uint32_t count, const uint8_t *buffer)
{
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
- int retval;
-
- /* sanitize arguments */
- if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
- return ERROR_INVALID_ARGUMENTS;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct adiv5_dap *swjdp = &armv7m->dap;
+ int retval = ERROR_INVALID_ARGUMENTS;
- switch (size)
- {
+ if (count && buffer) {
+ switch (size) {
case 4:
retval = mem_ap_write_buf_u32(swjdp, buffer, 4 * 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);
+ }
}
return retval;
}
-int cortex_m3_bulk_write_memory(target_t *target, uint32_t address, uint32_t count, uint8_t *buffer)
+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);
}
-void cortex_m3_build_reg_cache(target_t *target)
+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);
}
-int cortex_m3_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
+static int cortex_m3_dwt_set_reg(struct reg *reg, uint8_t *buf)
{
- cortex_m3_build_reg_cache(target);
- return ERROR_OK;
+ 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.
+ */
}
-int cortex_m3_examine(struct target_s *target)
+static int cortex_m3_examine(struct target *target)
{
int retval;
- uint32_t cpuid, fpcr, dwtcr, ictr;
+ uint32_t cpuid, fpcr;
int i;
-
- /* get pointers to arch-specific information */
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ 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;
target_set_examined(target);
/* Read from Device Identification Registers */
- if ((retval = target_read_u32(target, CPUID, &cpuid)) != ERROR_OK)
+ retval = target_read_u32(target, CPUID, &cpuid);
+ if (retval != ERROR_OK)
return retval;
- if (((cpuid >> 4) & 0xc3f) == 0xc23) {
- LOG_DEBUG("CORTEX-M3 processor detected");
- if (((cpuid >> 20) & 0xf) >= 2) {
- armv7m->has_spec20 = true;
- LOG_DEBUG("r2p0 or later detected");
- }
- } else
- LOG_WARNING("not a CORTEX-M3 processor?");
+ 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);
- target_read_u32(target, NVIC_ICTR, &ictr);
- cortex_m3->intlinesnum = (ictr & 0x1F) + 1;
- cortex_m3->intsetenable = calloc(cortex_m3->intlinesnum, 4);
- for (i = 0; i < cortex_m3->intlinesnum; i++)
- {
- target_read_u32(target, NVIC_ISE0 + 4 * i, cortex_m3->intsetenable + i);
- LOG_DEBUG("interrupt enable[%i] = 0x%8.8" PRIx32 "", i, cortex_m3->intsetenable[i]);
- }
+ /* NOTE: FPB and DWT are both optional. */
/* Setup FPB */
target_read_u32(target, FP_CTRL, &fpcr);
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(cortex_m3_fp_comparator_t));
+ 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++)
{
LOG_DEBUG("FPB fpcr 0x%" PRIx32 ", numcode %i, numlit %i", fpcr, cortex_m3->fp_num_code, cortex_m3->fp_num_lit);
/* Setup DWT */
- target_read_u32(target, DWT_CTRL, &dwtcr);
- cortex_m3->dwt_num_comp = (dwtcr >> 28) & 0xF;
- cortex_m3->dwt_comp_available = cortex_m3->dwt_num_comp;
- cortex_m3->dwt_comparator_list = calloc(cortex_m3->dwt_num_comp, sizeof(cortex_m3_dwt_comparator_t));
- for (i = 0; i < cortex_m3->dwt_num_comp; i++)
- {
- cortex_m3->dwt_comparator_list[i].dwt_comparator_address = DWT_COMP0 + 0x10 * i;
- }
- }
-
- return ERROR_OK;
-}
+ cortex_m3_dwt_setup(cortex_m3, target);
-int cortex_m3_quit(void)
-{
+ /* 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;
}
-int cortex_m3_dcc_read(swjdp_common_t *swjdp, uint8_t *value, uint8_t *ctrl)
+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;
if (dcrdr & (1 << 0))
{
dcrdr = 0;
- mem_ap_write_buf_u16(swjdp, (uint8_t*)&dcrdr, 1, DCB_DCRDR);
+ retval = mem_ap_write_buf_u16(swjdp, (uint8_t*)&dcrdr, 1, DCB_DCRDR);
+ if (retval != ERROR_OK)
+ return retval;
}
return ERROR_OK;
}
-int cortex_m3_target_request_data(target_t *target, uint32_t size, uint8_t *buffer)
+static int cortex_m3_target_request_data(struct target *target,
+ uint32_t size, uint8_t *buffer)
{
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct adiv5_dap *swjdp = &armv7m->dap;
uint8_t data;
uint8_t ctrl;
uint32_t i;
return ERROR_OK;
}
-int cortex_m3_handle_target_request(void *priv)
+static int cortex_m3_handle_target_request(void *priv)
{
- target_t *target = priv;
+ struct target *target = priv;
if (!target_was_examined(target))
return ERROR_OK;
- armv7m_common_t *armv7m = target->arch_info;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct adiv5_dap *swjdp = &armv7m->dap;
if (!target->dbg_msg_enabled)
return ERROR_OK;
return ERROR_OK;
}
-int cortex_m3_init_arch_info(target_t *target, cortex_m3_common_t *cortex_m3, jtag_tap_t *tap)
+static int cortex_m3_init_arch_info(struct target *target,
+ struct cortex_m3_common *cortex_m3, struct jtag_tap *tap)
{
int retval;
- armv7m_common_t *armv7m;
- armv7m = &cortex_m3->armv7m;
+ struct armv7m_common *armv7m = &cortex_m3->armv7m;
armv7m_init_arch_info(target, armv7m);
cortex_m3->jtag_info.tap = tap;
cortex_m3->jtag_info.scann_size = 4;
- armv7m->swjdp_info.dp_select_value = -1;
- armv7m->swjdp_info.ap_csw_value = -1;
- armv7m->swjdp_info.ap_tar_value = -1;
- armv7m->swjdp_info.jtag_info = &cortex_m3->jtag_info;
- armv7m->swjdp_info.memaccess_tck = 8;
- armv7m->swjdp_info.tar_autoincr_block = (1 << 12); /* Cortex-M3 has 4096 bytes autoincrement range */
+ /* 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;
- /* initialize arch-specific breakpoint handling */
+ armv7m->arm.dap = &armv7m->dap;
- cortex_m3->common_magic = CORTEX_M3_COMMON_MAGIC;
- cortex_m3->arch_info = NULL;
+ /* 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->pre_debug_entry = NULL;
armv7m->post_debug_entry = NULL;
armv7m->pre_restore_context = NULL;
- armv7m->post_restore_context = NULL;
- armv7m->arch_info = cortex_m3;
armv7m->load_core_reg_u32 = cortex_m3_load_core_reg_u32;
armv7m->store_core_reg_u32 = cortex_m3_store_core_reg_u32;
return ERROR_OK;
}
-int cortex_m3_target_create(struct target_s *target, Jim_Interp *interp)
+static int cortex_m3_target_create(struct target *target, Jim_Interp *interp)
{
- cortex_m3_common_t *cortex_m3 = calloc(1,sizeof(cortex_m3_common_t));
+ 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;
+}
+
/*
- * REVISIT Thumb2 disassembly should work for all ARMv7 cores, as well
- * as at least ARM-1156T2. The interesting thing about Cortex-M is
- * that *only* Thumb2 disassembly matters. There are also some small
- * additions to Thumb2 that are specific to ARMv7-M.
+ * 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 int
-handle_cortex_m3_disassemble_command(struct command_context_s *cmd_ctx,
- char *cmd, char **args, int argc)
+
+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)
{
- int retval = ERROR_OK;
- target_t *target = get_current_target(cmd_ctx);
- uint32_t address;
- unsigned long count;
- arm_instruction_t cur_instruction;
-
- if (argc != 2) {
- command_print(cmd_ctx,
- "usage: cortex_m3 disassemble <address> <count>");
- return ERROR_OK;
- }
+ 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;
- errno = 0;
- address = strtoul(args[0], NULL, 0);
- if (errno)
- return ERROR_FAIL;
- count = strtoul(args[1], NULL, 0);
- if (errno)
- return ERROR_FAIL;
+ 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;
- while (count--) {
- retval = thumb2_opcode(target, address, &cur_instruction);
+ 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;
- command_print(cmd_ctx, "%s", cur_instruction.text);
- address += cur_instruction.instruction_size;
+
+ /* 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;
}
-int cortex_m3_register_commands(struct command_context_s *cmd_ctx)
+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;
- command_t *cortex_m3_cmd;
- retval = armv7m_register_commands(cmd_ctx);
+ 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;
- cortex_m3_cmd = register_command(cmd_ctx, NULL, "cortex_m3",
- NULL, COMMAND_ANY, "cortex_m3 specific commands");
-
- register_command(cmd_ctx, cortex_m3_cmd, "disassemble",
- handle_cortex_m3_disassemble_command, COMMAND_EXEC,
- "disassemble Thumb2 instructions <address> <count>");
- register_command(cmd_ctx, cortex_m3_cmd, "maskisr",
- handle_cortex_m3_mask_interrupts_command, COMMAND_EXEC,
- "mask cortex_m3 interrupts ['on'|'off']");
-
- return retval;
-}
-int handle_cortex_m3_mask_interrupts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
-{
- target_t *target = get_current_target(cmd_ctx);
- armv7m_common_t *armv7m = target->arch_info;
- cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+ 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);
+ command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME);
return ERROR_OK;
}
- if (argc > 0)
+ if (CMD_ARGC > 0)
{
- if (!strcmp(args[0], "on"))
+ n = Jim_Nvp_name2value_simple(nvp_maskisr_modes, CMD_ARGV[0]);
+ if (n->name == NULL)
{
- cortex_m3_write_debug_halt_mask(target, C_HALT | C_MASKINTS, 0);
+ return ERROR_COMMAND_SYNTAX_ERROR;
}
- else if (!strcmp(args[0], "off"))
+ 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);
+ cortex_m3_write_debug_halt_mask(target, C_HALT | C_MASKINTS, 0);
}
else
{
- command_print(cmd_ctx, "usage: cortex_m3 maskisr ['on'|'off']");
+ cortex_m3_write_debug_halt_mask(target, C_HALT, C_MASKINTS);
}
}
- command_print(cmd_ctx, "cortex_m3 interrupt mask %s",
- (cortex_m3->dcb_dhcsr & C_MASKINTS) ? "on" : "off");
+ 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,
+};
Code Review / openocd.git / blobdiff