#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"
/* 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.
*/
-#define ARRAY_SIZE(x) ((int)(sizeof(x)/sizeof((x)[0])))
-
/* forward declarations */
-static int cortex_m3_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
-static int cortex_m3_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
-static void cortex_m3_enable_watchpoints(struct target_s *target);
-static int cortex_m3_store_core_reg_u32(target_t *target,
+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);
-#ifdef ARMV7_GDB_HACKS
-extern uint8_t armv7m_gdb_dummy_cpsr_value[];
-extern reg_t armv7m_gdb_dummy_cpsr_reg;
-#endif
-
-static int cortexm3_dap_read_coreregister_u32(swjdp_common_t *swjdp,
+static int cortexm3_dap_read_coreregister_u32(struct swjdp_common *swjdp,
uint32_t *value, int regnum)
{
int retval;
mem_ap_read_u32(swjdp, DCB_DCRDR, &dcrdr);
- swjdp->trans_mode = TRANS_MODE_COMPOSITE;
-
/* 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);
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 = swjdp_transaction_endcheck(swjdp);
+ retval = jtagdp_transaction_endcheck(swjdp);
/* restore DCB_DCRDR - this needs to be in a seperate
* transaction otherwise the emulated DCC channel breaks */
return retval;
}
-static int cortexm3_dap_write_coreregister_u32(swjdp_common_t *swjdp,
+static int cortexm3_dap_write_coreregister_u32(struct swjdp_common *swjdp,
uint32_t value, int regnum)
{
int retval;
mem_ap_read_u32(swjdp, DCB_DCRDR, &dcrdr);
- swjdp->trans_mode = TRANS_MODE_COMPOSITE;
-
/* 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);
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 = swjdp_transaction_endcheck(swjdp);
+ retval = jtagdp_transaction_endcheck(swjdp);
/* restore DCB_DCRDR - this needs to be in a seperate
* transaction otherwise the emulated DCC channel breaks */
return retval;
}
-static int cortex_m3_write_debug_halt_mask(target_t *target,
+static int cortex_m3_write_debug_halt_mask(struct target *target,
uint32_t mask_on, uint32_t mask_off)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- struct swjdp_common_s *swjdp = &cortex_m3->armv7m.swjdp_info;
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+ struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
/* 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);
}
-static int cortex_m3_clear_halt(target_t *target)
+static int cortex_m3_clear_halt(struct target *target)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- struct swjdp_common_s *swjdp = &cortex_m3->armv7m.swjdp_info;
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+ struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
/* 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);
+
/* Clear Debug Fault Status */
mem_ap_write_atomic_u32(swjdp, NVIC_DFSR, cortex_m3->nvic_dfsr);
LOG_DEBUG(" NVIC_DFSR 0x%" PRIx32 "", cortex_m3->nvic_dfsr);
return ERROR_OK;
}
-static int cortex_m3_single_step_core(target_t *target)
+static int cortex_m3_single_step_core(struct target *target)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- struct swjdp_common_s *swjdp = &cortex_m3->armv7m.swjdp_info;
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+ struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
uint32_t dhcsr_save;
/* 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);
+ 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);
LOG_DEBUG(" ");
/* restore dhcsr reg */
return ERROR_OK;
}
-static int cortex_m3_endreset_event(target_t *target)
+static int cortex_m3_endreset_event(struct target *target)
{
int i;
uint32_t dcb_demcr;
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- struct swjdp_common_s *swjdp = &cortex_m3->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;
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+ struct armv7m_common *armv7m = &cortex_m3->armv7m;
+ struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
+ 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... */
mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &dcb_demcr);
LOG_DEBUG("DCB_DEMCR = 0x%8.8" PRIx32 "",dcb_demcr);
- /* this regsiter is used for emulated dcc channel */
+ /* this register is used for emulated dcc channel */
mem_ap_write_u32(swjdp, DCB_DCRDR, 0);
/* Enable debug requests */
/* 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.
+ */
+ mem_ap_write_u32(swjdp, DCB_DEMCR, TRCENA | armv7m->demcr);
+
+ /* 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);
target_write_u32(target, dwt_list[i].dwt_comparator_address + 8,
dwt_list[i].function);
}
- swjdp_transaction_endcheck(swjdp);
+ jtagdp_transaction_endcheck(swjdp);
- 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);
return ERROR_OK;
}
-static int cortex_m3_examine_debug_reason(target_t *target)
+static int cortex_m3_examine_debug_reason(struct target *target)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
/* THIS IS NOT GOOD, TODO - better logic for detection of debug state reason */
/* only check the debug reason if we don't know it already */
return ERROR_OK;
}
-static 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_s *armv7m = target_to_armv7m(target);
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct swjdp_common *swjdp = &armv7m->swjdp_info;
mem_ap_read_u32(swjdp, NVIC_SHCSR, &shcsr);
switch (armv7m->exception_number)
except_sr = 0;
break;
}
- swjdp_transaction_endcheck(swjdp);
+ jtagdp_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;
}
-static 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;
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- struct armv7m_common_s *armv7m = &cortex_m3->armv7m;
- 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 swjdp_common *swjdp = &armv7m->swjdp_info;
+ struct reg *r;
LOG_DEBUG(" ");
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
{
- armv7m->core_mode = buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_CONTROL].value, 0, 1);
+ 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)
return ERROR_OK;
}
-static int cortex_m3_poll(target_t *target)
+static int cortex_m3_poll(struct target *target)
{
int retval;
enum target_state prev_target_state = target->state;
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- struct swjdp_common_s *swjdp = &cortex_m3->armv7m.swjdp_info;
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+ struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
/* 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".
+ *
+ * REVISIT Is there a better way to report and handle this?
+ */
+ if (cortex_m3->dcb_dhcsr & S_LOCKUP) {
+ LOG_WARNING("%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;
+
+ /* refresh status bits */
+ mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
+ }
+
if (cortex_m3->dcb_dhcsr & S_RESET_ST)
{
/* check if still in reset */
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;
return ERROR_OK;
}
-static 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;
}
-static int cortex_m3_soft_reset_halt(struct target_s *target)
+static int cortex_m3_soft_reset_halt(struct target *target)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- struct swjdp_common_s *swjdp = &cortex_m3->armv7m.swjdp_info;
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+ struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
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() */
+ mem_ap_write_u32(swjdp, DCB_DEMCR,
+ TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET);
- /* Request a reset */
- mem_ap_write_atomic_u32(swjdp, NVIC_AIRCR, AIRCR_VECTKEY | AIRCR_VECTRESET);
+ /* Request a core-only reset */
+ mem_ap_write_atomic_u32(swjdp, NVIC_AIRCR,
+ AIRCR_VECTKEY | AIRCR_VECTRESET);
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))
+ mem_ap_read_atomic_u32(swjdp, NVIC_DFSR,
+ &cortex_m3->nvic_dfsr);
+ 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;
}
-static void cortex_m3_enable_breakpoints(struct target_s *target)
+static void cortex_m3_enable_breakpoints(struct target *target)
{
- breakpoint_t *breakpoint = target->breakpoints;
+ struct breakpoint *breakpoint = target->breakpoints;
/* set any pending breakpoints */
while (breakpoint)
{
- if (breakpoint->set == 0)
+ if (!breakpoint->set)
cortex_m3_set_breakpoint(target, breakpoint);
breakpoint = breakpoint->next;
}
}
-static int cortex_m3_resume(struct target_s *target, int current,
+static int cortex_m3_resume(struct target *target, int current,
uint32_t address, int handle_breakpoints, int debug_execution)
{
- struct armv7m_common_s *armv7m = target_to_armv7m(target);
- 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. */
- buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_PRIMASK].value, 0, 32, 1);
- armv7m->core_cache->reg_list[ARMV7M_PRIMASK].dirty = 1;
- armv7m->core_cache->reg_list[ARMV7M_PRIMASK].valid = 1;
+ /* We disable interrupts in the PRIMASK register instead of
+ * masking with C_MASKINTS. This is probably the same issue
+ * as Cortex-M3 Erratum 377493 (fixed in r1p0): C_MASKINTS
+ * in parallel with disabled interrupts can cause local faults
+ * to not be taken.
+ *
+ * REVISIT this clearly breaks non-debug execution, since the
+ * PRIMASK register state isn't saved/restored... workaround
+ * by never resuming app code after debug execution.
+ */
+ buf_set_u32(r->value, 0, 1, 1);
+ r->dirty = true;
+ r->valid = true;
/* Make sure we are in Thumb mode */
- 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);
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; */
-static int cortex_m3_step(struct target_s *target, int current,
+static int cortex_m3_step(struct target *target, int current,
uint32_t address, int handle_breakpoints)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- struct armv7m_common_s *armv7m = &cortex_m3->armv7m;
- 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 swjdp_common *swjdp = &armv7m->swjdp_info;
+ struct breakpoint *breakpoint = NULL;
+ struct reg *pc = armv7m->arm.pc;
+ bool bkpt_inst_found = false;
if (target->state != TARGET_HALTED)
{
/* current = 1: continue on current pc, otherwise continue at <address> */
if (!current)
- buf_set_u32(cortex_m3->armv7m.core_cache->reg_list[15].value,
- 0, 32, address);
+ buf_set_u32(pc->value, 0, 32, address);
/* the front-end may request us not to handle breakpoints */
if (handle_breakpoints) {
- breakpoint = breakpoint_find(target, buf_get_u32(armv7m
- ->core_cache->reg_list[15].value, 0, 32));
+ breakpoint = breakpoint_find(target,
+ buf_get_u32(pc->value, 0, 32));
if (breakpoint)
cortex_m3_unset_breakpoint(target, breakpoint);
}
+ armv7m_maybe_skip_bkpt_inst(target, &bkpt_inst_found);
+
target->debug_reason = DBG_REASON_SINGLESTEP;
armv7m_restore_context(target);
target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
- /* set step and clear halt */
- cortex_m3_write_debug_halt_mask(target, C_STEP, C_HALT);
+ /* 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)
+ {
+ /* 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);
/* 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);
+ LOG_DEBUG("target stepped dcb_dhcsr = 0x%" PRIx32
+ " nvic_icsr = 0x%" PRIx32,
+ cortex_m3->dcb_dhcsr, cortex_m3->nvic_icsr);
cortex_m3_debug_entry(target);
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;
}
-static int cortex_m3_assert_reset(target_t *target)
+static int cortex_m3_assert_reset(struct target *target)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- struct swjdp_common_s *swjdp = &cortex_m3->armv7m.swjdp_info;
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+ struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
int assert_srst = 1;
LOG_DEBUG("target->state: %s",
{
/* 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);
+ mem_ap_write_atomic_u32(swjdp, DCB_DHCSR,
+ DBGKEY | C_DEBUGEN | C_HALT);
/* 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);
+ /* 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?
+ */
+ mem_ap_write_atomic_u32(swjdp, DCB_DEMCR,
+ TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET);
}
/*
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)
{
return ERROR_OK;
}
-static 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));
}
static int
-cortex_m3_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+cortex_m3_set_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
int retval;
int fp_num = 0;
uint32_t hilo;
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- 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)
{
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)",
}
static int
-cortex_m3_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+cortex_m3_unset_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
int retval;
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- 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)
{
}
}
}
- breakpoint->set = 0;
+ breakpoint->set = false;
return ERROR_OK;
}
static int
-cortex_m3_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+cortex_m3_add_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
if (cortex_m3->auto_bp_type)
{
}
static int
-cortex_m3_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+cortex_m3_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
+ 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)
}
static int
-cortex_m3_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+cortex_m3_set_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
int dwt_num = 0;
uint32_t mask, temp;
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
/* watchpoint params were validated earlier */
mask = 0;
* watchpoint using comparator #1; comparator #0 matching cycle
* count; send data trace info through ITM and TPIU; etc
*/
- cortex_m3_dwt_comparator_t *comparator;
+ struct cortex_m3_dwt_comparator *comparator;
for (comparator = cortex_m3->dwt_comparator_list;
comparator->used && dwt_num < cortex_m3->dwt_num_comp;
}
static int
-cortex_m3_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+cortex_m3_unset_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- cortex_m3_dwt_comparator_t *comparator;
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+ struct cortex_m3_dwt_comparator *comparator;
int dwt_num;
if (!watchpoint->set)
target_write_u32(target, comparator->dwt_comparator_address + 8,
comparator->function);
- watchpoint->set = 0;
+ watchpoint->set = false;
return ERROR_OK;
}
static int
-cortex_m3_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+cortex_m3_add_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
-
- /* REVISIT why check? DWT can be updated with core running ... */
- if (target->state != TARGET_HALTED)
- {
- LOG_WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
if (cortex_m3->dwt_comp_available < 1)
{
}
static int
-cortex_m3_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+cortex_m3_remove_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
+ 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)
return ERROR_OK;
}
-static 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;
}
}
-static int cortex_m3_load_core_reg_u32(struct target_s *target,
+static int cortex_m3_load_core_reg_u32(struct target *target,
enum armv7m_regtype type, uint32_t num, uint32_t * value)
{
int retval;
- struct armv7m_common_s *armv7m = target_to_armv7m(target);
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct swjdp_common *swjdp = &armv7m->swjdp_info;
/* NOTE: we "know" here that the register identifiers used
* in the v7m header match the Cortex-M3 Debug Core Register
return ERROR_OK;
}
-static int cortex_m3_store_core_reg_u32(struct target_s *target,
+static int cortex_m3_store_core_reg_u32(struct target *target,
enum armv7m_regtype type, uint32_t num, uint32_t value)
{
int retval;
uint32_t reg;
- struct armv7m_common_s *armv7m = target_to_armv7m(target);
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct swjdp_common *swjdp = &armv7m->swjdp_info;
#ifdef ARMV7_GDB_HACKS
/* If the LR register is being modified, make sure it will put us
retval = cortexm3_dap_write_coreregister_u32(swjdp, value, num);
if (retval != ERROR_OK)
{
+ struct reg *r;
+
LOG_ERROR("JTAG failure %i", retval);
- armv7m->core_cache->reg_list[num].dirty = armv7m->core_cache->reg_list[num].valid;
+ 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);
return ERROR_OK;
}
-static int cortex_m3_read_memory(struct target_s *target, uint32_t address,
+static int cortex_m3_read_memory(struct target *target, uint32_t address,
uint32_t size, uint32_t count, uint8_t *buffer)
{
- struct armv7m_common_s *armv7m = target_to_armv7m(target);
- 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 swjdp_common *swjdp = &armv7m->swjdp_info;
+ 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;
}
-static int cortex_m3_write_memory(struct target_s *target, uint32_t address,
+static int cortex_m3_write_memory(struct target *target, uint32_t address,
uint32_t size, uint32_t count, uint8_t *buffer)
{
- struct armv7m_common_s *armv7m = target_to_armv7m(target);
- 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 swjdp_common *swjdp = &armv7m->swjdp_info;
+ 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;
}
-static int cortex_m3_bulk_write_memory(target_t *target, uint32_t address,
+static int cortex_m3_bulk_write_memory(struct target *target, uint32_t address,
uint32_t count, uint8_t *buffer)
{
return cortex_m3_write_memory(target, address, 4, count, buffer);
}
-static int cortex_m3_init_target(struct command_context_s *cmd_ctx,
- struct target_s *target)
+static int cortex_m3_init_target(struct command_context *cmd_ctx,
+ struct target *target)
{
armv7m_build_reg_cache(target);
return ERROR_OK;
*/
struct dwt_reg_state {
- struct target_s *target;
+ struct target *target;
uint32_t addr;
uint32_t value; /* scratch/cache */
};
-static int cortex_m3_dwt_get_reg(struct reg_s *reg)
+static int cortex_m3_dwt_get_reg(struct reg *reg)
{
struct dwt_reg_state *state = reg->arch_info;
return target_read_u32(state->target, state->addr, &state->value);
}
-static int cortex_m3_dwt_set_reg(struct reg_s *reg, uint8_t *buf)
+static int cortex_m3_dwt_set_reg(struct reg *reg, uint8_t *buf)
{
struct dwt_reg_state *state = reg->arch_info;
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 */
};
#undef DWT_COMPARATOR
};
-static int dwt_reg_type = -1;
+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_s *t, struct reg_s *r, struct dwt_reg *d)
+cortex_m3_dwt_addreg(struct target *t, struct reg *r, struct dwt_reg *d)
{
struct dwt_reg_state *state;
r->size = d->size;
r->value = &state->value;
r->arch_info = state;
- r->arch_type = dwt_reg_type;
+ r->type = &dwt_reg_type;
}
static void
-cortex_m3_dwt_setup(cortex_m3_common_t *cm3, struct target_s *target)
+cortex_m3_dwt_setup(struct cortex_m3_common *cm3, struct target *target)
{
uint32_t dwtcr;
- struct reg_cache_s *cache;
- cortex_m3_dwt_comparator_t *comparator;
+ struct reg_cache *cache;
+ struct cortex_m3_dwt_comparator *comparator;
int reg, i;
target_read_u32(target, DWT_CTRL, &dwtcr);
return;
}
- if (dwt_reg_type < 0)
- dwt_reg_type = register_reg_arch_type(cortex_m3_dwt_get_reg,
- cortex_m3_dwt_set_reg);
-
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(cortex_m3_dwt_comparator_t));
+ sizeof(struct cortex_m3_dwt_comparator));
if (!cm3->dwt_comparator_list) {
fail0:
cm3->dwt_num_comp = 0;
*/
}
-static int cortex_m3_examine(struct target_s *target)
+static int cortex_m3_examine(struct target *target)
{
int retval;
uint32_t cpuid, fpcr;
int i;
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- struct swjdp_common_s *swjdp = &cortex_m3->armv7m.swjdp_info;
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+ struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
if ((retval = ahbap_debugport_init(swjdp)) != ERROR_OK)
return retval;
return retval;
if (((cpuid >> 4) & 0xc3f) == 0xc23)
- LOG_DEBUG("CORTEX-M3 processor detected");
+ LOG_DEBUG("Cortex-M3 r%" PRId8 "p%" PRId8 " processor detected",
+ (uint8_t)((cpuid >> 20) & 0xf), (uint8_t)((cpuid >> 0) & 0xf));
LOG_DEBUG("cpuid: 0x%8.8" PRIx32 "", cpuid);
/* NOTE: FPB and DWT are both optional. */
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++)
{
/* Setup DWT */
cortex_m3_dwt_setup(cortex_m3, target);
+
+ /* These hardware breakpoints only work for code in flash! */
+ LOG_INFO("%s: hardware has %d breakpoints, %d watchpoints",
+ target_name(target),
+ cortex_m3->fp_num_code,
+ cortex_m3->dwt_num_comp);
}
return ERROR_OK;
}
-static int cortex_m3_dcc_read(swjdp_common_t *swjdp, uint8_t *value, uint8_t *ctrl)
+static int cortex_m3_dcc_read(struct swjdp_common *swjdp, uint8_t *value, uint8_t *ctrl)
{
uint16_t dcrdr;
return ERROR_OK;
}
-static int cortex_m3_target_request_data(target_t *target,
+static int cortex_m3_target_request_data(struct target *target,
uint32_t size, uint8_t *buffer)
{
- struct armv7m_common_s *armv7m = target_to_armv7m(target);
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct swjdp_common *swjdp = &armv7m->swjdp_info;
uint8_t data;
uint8_t ctrl;
uint32_t i;
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;
- struct armv7m_common_s *armv7m = target_to_armv7m(target);
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ struct swjdp_common *swjdp = &armv7m->swjdp_info;
if (!target->dbg_msg_enabled)
return ERROR_OK;
return ERROR_OK;
}
-static 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;
- struct armv7m_common_s *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;
+ /* Leave (only) generic DAP stuff for debugport_init(); */
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 */
+ /* Cortex-M3 has 4096 bytes autoincrement range */
+ armv7m->swjdp_info.tar_autoincr_block = (1 << 12);
/* register arch-specific functions */
armv7m->examine_debug_reason = cortex_m3_examine_debug_reason;
return ERROR_OK;
}
-static 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);
/*--------------------------------------------------------------------------*/
-static int cortex_m3_verify_pointer(struct command_context_s *cmd_ctx,
- struct cortex_m3_common_s *cm3)
+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");
* cortexm3_target structure, which is only used with CM3 targets.
*/
-/*
- * 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.
- */
-COMMAND_HANDLER(handle_cortex_m3_disassemble_command)
-{
- int retval;
- target_t *target = get_current_target(cmd_ctx);
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- uint32_t address;
- unsigned long count = 1;
- arm_instruction_t cur_instruction;
-
- retval = cortex_m3_verify_pointer(cmd_ctx, cortex_m3);
- if (retval != ERROR_OK)
- return retval;
-
- errno = 0;
- switch (argc) {
- case 2:
- COMMAND_PARSE_NUMBER(ulong, args[1], count);
- /* FALL THROUGH */
- case 1:
- COMMAND_PARSE_NUMBER(u32, args[0], address);
- break;
- default:
- command_print(cmd_ctx,
- "usage: cortex_m3 disassemble <address> [<count>]");
- return ERROR_OK;
- }
-
- while (count--) {
- retval = thumb2_opcode(target, address, &cur_instruction);
- if (retval != ERROR_OK)
- return retval;
- command_print(cmd_ctx, "%s", cur_instruction.text);
- address += cur_instruction.instruction_size;
- }
-
- return ERROR_OK;
-}
-
static const struct {
char name[10];
unsigned mask;
COMMAND_HANDLER(handle_cortex_m3_vector_catch_command)
{
- target_t *target = get_current_target(cmd_ctx);
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
- struct armv7m_common_s *armv7m = &cortex_m3->armv7m;
- swjdp_common_t *swjdp = &armv7m->swjdp_info;
+ 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 swjdp_common *swjdp = &armv7m->swjdp_info;
uint32_t demcr = 0;
int retval;
- int i;
- retval = cortex_m3_verify_pointer(cmd_ctx, cortex_m3);
+ retval = cortex_m3_verify_pointer(CMD_CTX, cortex_m3);
if (retval != ERROR_OK)
return retval;
mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &demcr);
- if (argc > 0) {
+ if (CMD_ARGC > 0) {
unsigned catch = 0;
- if (argc == 1) {
- if (strcmp(args[0], "all") == 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(args[0], "none") == 0) {
+ } else if (strcmp(CMD_ARGV[0], "none") == 0) {
goto write;
}
}
- while (argc-- > 0) {
+ while (CMD_ARGC-- > 0) {
+ unsigned i;
for (i = 0; i < ARRAY_SIZE(vec_ids); i++) {
- if (strcmp(args[argc], vec_ids[i].name) != 0)
+ 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'", args[argc]);
+ LOG_ERROR("No CM3 vector '%s'", CMD_ARGV[CMD_ARGC]);
return ERROR_INVALID_ARGUMENTS;
}
}
write:
+ /* For now, armv7m->demcr only stores vector catch flags. */
+ armv7m->demcr = catch;
+
demcr &= ~0xffff;
demcr |= catch;
- /* write, but don't assume it stuck */
+ /* write, but don't assume it stuck (why not??) */
mem_ap_write_u32(swjdp, DCB_DEMCR, demcr);
mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &demcr);
+
+ /* 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 (i = 0; i < ARRAY_SIZE(vec_ids); i++)
- command_print(cmd_ctx, "%9s: %s", vec_ids[i].name,
+ for (unsigned i = 0; i < ARRAY_SIZE(vec_ids); i++)
+ {
+ command_print(CMD_CTX, "%9s: %s", vec_ids[i].name,
(demcr & vec_ids[i].mask) ? "catch" : "ignore");
+ }
return ERROR_OK;
}
COMMAND_HANDLER(handle_cortex_m3_mask_interrupts_command)
{
- target_t *target = get_current_target(cmd_ctx);
- struct cortex_m3_common_s *cortex_m3 = target_to_cm3(target);
+ struct target *target = get_current_target(CMD_CTX);
+ struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
int retval;
- retval = cortex_m3_verify_pointer(cmd_ctx, cortex_m3);
+ retval = cortex_m3_verify_pointer(CMD_CTX, cortex_m3);
if (retval != ERROR_OK)
return retval;
if (target->state != TARGET_HALTED)
{
- command_print(cmd_ctx, "target must be stopped for \"%s\" command", CMD_NAME);
+ 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"))
- {
- cortex_m3_write_debug_halt_mask(target, C_HALT | C_MASKINTS, 0);
- }
- else if (!strcmp(args[0], "off"))
- {
- cortex_m3_write_debug_halt_mask(target, C_HALT, C_MASKINTS);
- }
- else
- {
- command_print(cmd_ctx, "usage: cortex_m3 maskisr ['on'|'off']");
- }
+ bool enable;
+ COMMAND_PARSE_ON_OFF(CMD_ARGV[0], enable);
+ uint32_t mask_on = C_HALT | (enable ? C_MASKINTS : 0);
+ uint32_t mask_off = enable ? 0 : C_MASKINTS;
+ cortex_m3_write_debug_halt_mask(target, mask_on, mask_off);
}
- command_print(cmd_ctx, "cortex_m3 interrupt mask %s",
+ command_print(CMD_CTX, "cortex_m3 interrupt mask %s",
(cortex_m3->dcb_dhcsr & C_MASKINTS) ? "on" : "off");
return ERROR_OK;
}
-static int cortex_m3_register_commands(struct command_context_s *cmd_ctx)
-{
- int retval;
- command_t *cortex_m3_cmd;
-
- retval = armv7m_register_commands(cmd_ctx);
-
- 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']");
- register_command(cmd_ctx, cortex_m3_cmd, "vector_catch",
- handle_cortex_m3_vector_catch_command, COMMAND_EXEC,
- "catch hardware vectors ['all'|'none'|<list>]");
-
- return retval;
-}
+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 = "['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'|...)*]",
+ },
+ 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
+};
-target_type_t cortexm3_target =
+struct target_type cortexm3_target =
{
.name = "cortex_m3",
.add_watchpoint = cortex_m3_add_watchpoint,
.remove_watchpoint = cortex_m3_remove_watchpoint,
- .register_commands = cortex_m3_register_commands,
+ .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