#include "cortex_m.h"
#include "target_request.h"
#include "target_type.h"
+#include "arm_adi_v5.h"
#include "arm_disassembler.h"
#include "register.h"
#include "arm_opcodes.h"
#include "arm_semihosting.h"
#include <helper/time_support.h>
+#include <rtt/rtt.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.
* any longer.
*/
+/* Supported Cortex-M Cores */
+static const struct cortex_m_part_info cortex_m_parts[] = {
+ {
+ .partno = CORTEX_M0_PARTNO,
+ .name = "Cortex-M0",
+ .arch = ARM_ARCH_V6M,
+ },
+ {
+ .partno = CORTEX_M0P_PARTNO,
+ .name = "Cortex-M0+",
+ .arch = ARM_ARCH_V6M,
+ },
+ {
+ .partno = CORTEX_M1_PARTNO,
+ .name = "Cortex-M1",
+ .arch = ARM_ARCH_V6M,
+ },
+ {
+ .partno = CORTEX_M3_PARTNO,
+ .name = "Cortex-M3",
+ .arch = ARM_ARCH_V7M,
+ .flags = CORTEX_M_F_TAR_AUTOINCR_BLOCK_4K,
+ },
+ {
+ .partno = CORTEX_M4_PARTNO,
+ .name = "Cortex-M4",
+ .arch = ARM_ARCH_V7M,
+ .flags = CORTEX_M_F_HAS_FPV4 | CORTEX_M_F_TAR_AUTOINCR_BLOCK_4K,
+ },
+ {
+ .partno = CORTEX_M7_PARTNO,
+ .name = "Cortex-M7",
+ .arch = ARM_ARCH_V7M,
+ .flags = CORTEX_M_F_HAS_FPV5,
+ },
+ {
+ .partno = CORTEX_M23_PARTNO,
+ .name = "Cortex-M23",
+ .arch = ARM_ARCH_V8M,
+ },
+ {
+ .partno = CORTEX_M33_PARTNO,
+ .name = "Cortex-M33",
+ .arch = ARM_ARCH_V8M,
+ .flags = CORTEX_M_F_HAS_FPV5,
+ },
+ {
+ .partno = CORTEX_M35P_PARTNO,
+ .name = "Cortex-M35P",
+ .arch = ARM_ARCH_V8M,
+ .flags = CORTEX_M_F_HAS_FPV5,
+ },
+ {
+ .partno = CORTEX_M55_PARTNO,
+ .name = "Cortex-M55",
+ .arch = ARM_ARCH_V8M,
+ .flags = CORTEX_M_F_HAS_FPV5,
+ },
+};
+
/* forward declarations */
static int cortex_m_store_core_reg_u32(struct target *target,
uint32_t num, uint32_t value);
static void cortex_m_dwt_free(struct target *target);
-static int cortexm_dap_read_coreregister_u32(struct target *target,
- uint32_t *value, int regnum)
+/** DCB DHCSR register contains S_RETIRE_ST and S_RESET_ST bits cleared
+ * on a read. Call this helper function each time DHCSR is read
+ * to preserve S_RESET_ST state in case of a reset event was detected.
+ */
+static inline void cortex_m_cumulate_dhcsr_sticky(struct cortex_m_common *cortex_m,
+ uint32_t dhcsr)
+{
+ cortex_m->dcb_dhcsr_cumulated_sticky |= dhcsr;
+}
+
+/** Read DCB DHCSR register to cortex_m->dcb_dhcsr and cumulate
+ * sticky bits in cortex_m->dcb_dhcsr_cumulated_sticky
+ */
+static int cortex_m_read_dhcsr_atomic_sticky(struct target *target)
+{
+ struct cortex_m_common *cortex_m = target_to_cm(target);
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+
+ int retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR,
+ &cortex_m->dcb_dhcsr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ cortex_m_cumulate_dhcsr_sticky(cortex_m, cortex_m->dcb_dhcsr);
+ return ERROR_OK;
+}
+
+static int cortex_m_load_core_reg_u32(struct target *target,
+ uint32_t regsel, uint32_t *value)
{
struct armv7m_common *armv7m = target_to_armv7m(target);
int retval;
return retval;
}
- retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DCRSR, regnum);
+ retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DCRSR, regsel);
if (retval != ERROR_OK)
return retval;
return retval;
}
-static int cortexm_dap_write_coreregister_u32(struct target *target,
- uint32_t value, int regnum)
+static int cortex_m_store_core_reg_u32(struct target *target,
+ uint32_t regsel, uint32_t value)
{
struct armv7m_common *armv7m = target_to_armv7m(target);
int retval;
if (retval != ERROR_OK)
return retval;
- retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DCRSR, regnum | DCRSR_WnR);
+ retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DCRSR, regsel | DCRSR_WNR);
if (retval != ERROR_OK)
return retval;
static int cortex_m_single_step_core(struct target *target)
{
struct cortex_m_common *cortex_m = target_to_cm(target);
- struct armv7m_common *armv7m = &cortex_m->armv7m;
int retval;
/* Mask interrupts before clearing halt, if not done already. This avoids
* HALT can put the core into an unknown state.
*/
if (!(cortex_m->dcb_dhcsr & C_MASKINTS)) {
- retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DHCSR,
- DBGKEY | C_MASKINTS | C_HALT | C_DEBUGEN);
+ retval = cortex_m_write_debug_halt_mask(target, C_MASKINTS, 0);
if (retval != ERROR_OK)
return retval;
}
- retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DHCSR,
- DBGKEY | C_MASKINTS | C_STEP | C_DEBUGEN);
+ retval = cortex_m_write_debug_halt_mask(target, C_STEP, C_HALT);
if (retval != ERROR_OK)
return retval;
LOG_DEBUG(" ");
static int cortex_m_endreset_event(struct target *target)
{
- int i;
int retval;
uint32_t dcb_demcr;
struct cortex_m_common *cortex_m = target_to_cm(target);
if (retval != ERROR_OK)
return retval;
- /* Enable debug requests */
- retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr);
+ retval = cortex_m_read_dhcsr_atomic_sticky(target);
if (retval != ERROR_OK)
return retval;
+
if (!(cortex_m->dcb_dhcsr & C_DEBUGEN)) {
+ /* Enable debug requests */
retval = cortex_m_write_debug_halt_mask(target, 0, C_HALT | C_STEP | C_MASKINTS);
if (retval != ERROR_OK)
return retval;
cortex_m->fpb_enabled = true;
/* Restore FPB registers */
- for (i = 0; i < cortex_m->fp_num_code + cortex_m->fp_num_lit; i++) {
+ for (unsigned int i = 0; i < cortex_m->fp_num_code + cortex_m->fp_num_lit; i++) {
retval = target_write_u32(target, fp_list[i].fpcr_address, fp_list[i].fpcr_value);
if (retval != ERROR_OK)
return retval;
}
/* Restore DWT registers */
- for (i = 0; i < cortex_m->dwt_num_comp; i++) {
+ for (unsigned int i = 0; i < cortex_m->dwt_num_comp; i++) {
retval = target_write_u32(target, dwt_list[i].dwt_comparator_address + 0,
dwt_list[i].comp);
if (retval != ERROR_OK)
register_cache_invalidate(armv7m->arm.core_cache);
/* make sure we have latest dhcsr flags */
- retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr);
+ retval = cortex_m_read_dhcsr_atomic_sticky(target);
+ if (retval != ERROR_OK)
+ return retval;
return retval;
}
cortex_m_set_maskints_for_halt(target);
cortex_m_clear_halt(target);
- retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr);
+
+ retval = cortex_m_read_dhcsr_atomic_sticky(target);
if (retval != ERROR_OK)
return retval;
/* examine PE security state */
bool secure_state = false;
- if (armv7m->arm.is_armv8m) {
+ if (armv7m->arm.arch == ARM_ARCH_V8M) {
uint32_t dscsr;
retval = mem_ap_read_u32(armv7m->debug_ap, DCB_DSCSR, &dscsr);
for (i = 0; i < num_regs; i++) {
r = &armv7m->arm.core_cache->reg_list[i];
- if (!r->valid)
+ if (r->exist && !r->valid)
arm->read_core_reg(target, r, i, ARM_MODE_ANY);
}
r = arm->cpsr;
xPSR = buf_get_u32(r->value, 0, 32);
- /* For IT instructions xPSR must be reloaded on resume and clear on debug exec */
- if (xPSR & 0xf00) {
- r->dirty = r->valid;
- cortex_m_store_core_reg_u32(target, 16, xPSR & ~0xff);
- }
-
/* Are we in an exception handler */
if (xPSR & 0x1FF) {
armv7m->exception_number = (xPSR & 0x1FF);
arm->map = armv7m_msp_reg_map;
} else {
unsigned control = buf_get_u32(arm->core_cache
- ->reg_list[ARMV7M_CONTROL].value, 0, 2);
+ ->reg_list[ARMV7M_CONTROL].value, 0, 3);
/* is this thread privileged? */
arm->core_mode = control & 1
struct armv7m_common *armv7m = &cortex_m->armv7m;
/* Read from Debug Halting Control and Status Register */
- retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr);
+ retval = cortex_m_read_dhcsr_atomic_sticky(target);
if (retval != ERROR_OK) {
target->state = TARGET_UNKNOWN;
return retval;
detected_failure = ERROR_FAIL;
/* refresh status bits */
- retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr);
+ retval = cortex_m_read_dhcsr_atomic_sticky(target);
if (retval != ERROR_OK)
return retval;
}
- if (cortex_m->dcb_dhcsr & S_RESET_ST) {
+ if (cortex_m->dcb_dhcsr_cumulated_sticky & S_RESET_ST) {
+ cortex_m->dcb_dhcsr_cumulated_sticky &= ~S_RESET_ST;
if (target->state != TARGET_RESET) {
target->state = TARGET_RESET;
LOG_INFO("%s: external reset detected", target_name(target));
}
}
- /* REVISIT when S_SLEEP is set, it's in a Sleep or DeepSleep state.
- * How best to model low power modes?
- */
-
if (target->state == TARGET_UNKNOWN) {
- /* check if processor is retiring instructions */
- if (cortex_m->dcb_dhcsr & S_RETIRE_ST) {
+ /* Check if processor is retiring instructions or sleeping.
+ * Unlike S_RESET_ST here we test if the target *is* running now,
+ * not if it has been running (possibly in the past). Instructions are
+ * typically processed much faster than OpenOCD polls DHCSR so S_RETIRE_ST
+ * is read always 1. That's the reason not to use dcb_dhcsr_cumulated_sticky.
+ */
+ if (cortex_m->dcb_dhcsr & S_RETIRE_ST || cortex_m->dcb_dhcsr & S_SLEEP) {
target->state = TARGET_RUNNING;
retval = ERROR_OK;
}
{
struct cortex_m_common *cortex_m = target_to_cm(target);
struct armv7m_common *armv7m = &cortex_m->armv7m;
- uint32_t dcb_dhcsr = 0;
int retval, timeout = 0;
/* on single cortex_m MCU soft_reset_halt should be avoided as same functionality
* core, not the peripherals */
LOG_DEBUG("soft_reset_halt is discouraged, please use 'reset halt' instead.");
+ if (!cortex_m->vectreset_supported) {
+ LOG_ERROR("VECTRESET is not supported on this Cortex-M core");
+ return ERROR_FAIL;
+ }
+
/* Set C_DEBUGEN */
retval = cortex_m_write_debug_halt_mask(target, 0, C_STEP | C_MASKINTS);
if (retval != ERROR_OK)
register_cache_invalidate(cortex_m->armv7m.arm.core_cache);
while (timeout < 100) {
- retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &dcb_dhcsr);
+ retval = cortex_m_read_dhcsr_atomic_sticky(target);
if (retval == ERROR_OK) {
retval = mem_ap_read_atomic_u32(armv7m->debug_ap, NVIC_DFSR,
&cortex_m->nvic_dfsr);
if (retval != ERROR_OK)
return retval;
- if ((dcb_dhcsr & S_HALT)
+ if ((cortex_m->dcb_dhcsr & S_HALT)
&& (cortex_m->nvic_dfsr & DFSR_VCATCH)) {
- LOG_DEBUG("system reset-halted, DHCSR 0x%08x, "
- "DFSR 0x%08x",
- (unsigned) dcb_dhcsr,
- (unsigned) cortex_m->nvic_dfsr);
+ LOG_DEBUG("system reset-halted, DHCSR 0x%08" PRIx32 ", DFSR 0x%08" PRIx32,
+ cortex_m->dcb_dhcsr, cortex_m->nvic_dfsr);
cortex_m_poll(target);
/* FIXME restore user's vector catch config */
return ERROR_OK;
} else
LOG_DEBUG("waiting for system reset-halt, "
- "DHCSR 0x%08x, %d ms",
- (unsigned) dcb_dhcsr, timeout);
+ "DHCSR 0x%08" PRIx32 ", %d ms",
+ cortex_m->dcb_dhcsr, timeout);
}
timeout++;
alive_sleep(1);
* 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.
+ * This breaks non-debug (application) execution if not
+ * called from armv7m_start_algorithm() which saves registers.
*/
buf_set_u32(r->value, 0, 1, 1);
r->dirty = true;
r->valid = true;
- /* Make sure we are in Thumb mode */
+ /* Make sure we are in Thumb mode, set xPSR.T bit */
+ /* armv7m_start_algorithm() initializes entire xPSR register.
+ * This duplicity handles the case when cortex_m_resume()
+ * is used with the debug_execution flag directly,
+ * not called through armv7m_start_algorithm().
+ */
r = armv7m->arm.cpsr;
buf_set_u32(r->value, 24, 1, 1);
r->dirty = true;
}
/* current = 1: continue on current pc, otherwise continue at <address> */
- if (!current)
+ if (!current) {
buf_set_u32(pc->value, 0, 32, address);
+ pc->dirty = true;
+ pc->valid = true;
+ }
uint32_t pc_value = buf_get_u32(pc->value, 0, 32);
/* Wait for pending handlers to complete or timeout */
do {
- retval = mem_ap_read_atomic_u32(armv7m->debug_ap,
- DCB_DHCSR,
- &cortex_m->dcb_dhcsr);
+ retval = cortex_m_read_dhcsr_atomic_sticky(target);
if (retval != ERROR_OK) {
target->state = TARGET_UNKNOWN;
return retval;
}
}
- retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr);
+ retval = cortex_m_read_dhcsr_atomic_sticky(target);
if (retval != ERROR_OK)
return retval;
}
/* Enable debug requests */
- int retval;
- retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr);
+ int retval = cortex_m_read_dhcsr_atomic_sticky(target);
+
/* Store important errors instead of failing and proceed to reset assert */
if (retval != ERROR_OK || !(cortex_m->dcb_dhcsr & C_DEBUGEN))
retval = ERROR_OK;
} else {
/* Use a standard Cortex-M3 software reset mechanism.
- * We default to using VECRESET as it is supported on all current cores
+ * We default to using VECTRESET as it is supported on all current cores
* (except Cortex-M0, M0+ and M1 which support SYSRESETREQ only!)
* This has the disadvantage of not resetting the peripherals, so a
* reset-init event handler is needed to perform any peripheral resets.
if (retval3 != ERROR_OK)
LOG_DEBUG("Ignoring AP write error right after reset");
- retval3 = dap_dp_init(armv7m->debug_ap->dap);
- if (retval3 != ERROR_OK)
+ retval3 = dap_dp_init_or_reconnect(armv7m->debug_ap->dap);
+ if (retval3 != ERROR_OK) {
LOG_ERROR("DP initialisation failed");
-
- else {
+ /* The error return value must not be propagated in this case.
+ * SYSRESETREQ or VECTRESET have been possibly triggered
+ * so reset processing should continue */
+ } else {
/* I do not know why this is necessary, but it
* fixes strange effects (step/resume cause NMI
* after reset) on LM3S6918 -- Michael Schwingen
if ((jtag_reset_config & RESET_HAS_SRST) &&
!(jtag_reset_config & RESET_SRST_NO_GATING) &&
target_was_examined(target)) {
- int retval = dap_dp_init(armv7m->debug_ap->dap);
+
+ int retval = dap_dp_init_or_reconnect(armv7m->debug_ap->dap);
if (retval != ERROR_OK) {
LOG_ERROR("DP initialisation failed");
return retval;
int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
int retval;
- int fp_num = 0;
+ unsigned int fp_num = 0;
struct cortex_m_common *cortex_m = target_to_cm(target);
struct cortex_m_fp_comparator *comparator_list = cortex_m->fp_comparator_list;
struct cortex_m_common *cortex_m = target_to_cm(target);
struct cortex_m_fp_comparator *comparator_list = cortex_m->fp_comparator_list;
- if (!breakpoint->set) {
+ if (breakpoint->set <= 0) {
LOG_WARNING("breakpoint not set");
return ERROR_OK;
}
breakpoint->set);
if (breakpoint->type == BKPT_HARD) {
- int fp_num = breakpoint->set - 1;
- if ((fp_num < 0) || (fp_num >= cortex_m->fp_num_code)) {
+ unsigned int fp_num = breakpoint->set - 1;
+ if (fp_num >= cortex_m->fp_num_code) {
LOG_DEBUG("Invalid FP Comparator number in breakpoint");
return ERROR_OK;
}
return cortex_m_unset_breakpoint(target, breakpoint);
}
-int cortex_m_set_watchpoint(struct target *target, struct watchpoint *watchpoint)
+static int cortex_m_set_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
- int dwt_num = 0;
+ unsigned int dwt_num = 0;
struct cortex_m_common *cortex_m = target_to_cm(target);
/* REVISIT Don't fully trust these "not used" records ... users
return ERROR_OK;
}
-int cortex_m_unset_watchpoint(struct target *target, struct watchpoint *watchpoint)
+static int cortex_m_unset_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
struct cortex_m_common *cortex_m = target_to_cm(target);
struct cortex_m_dwt_comparator *comparator;
- int dwt_num;
- if (!watchpoint->set) {
+ if (watchpoint->set <= 0) {
LOG_WARNING("watchpoint (wpid: %d) not set",
watchpoint->unique_id);
return ERROR_OK;
}
- dwt_num = watchpoint->set - 1;
+ unsigned int 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_m->dwt_num_comp)) {
+ if (dwt_num >= cortex_m->dwt_num_comp) {
LOG_DEBUG("Invalid DWT Comparator number in watchpoint");
return ERROR_OK;
}
return ERROR_OK;
}
-void cortex_m_enable_watchpoints(struct target *target)
+int cortex_m_hit_watchpoint(struct target *target, struct watchpoint **hit_watchpoint)
{
- struct watchpoint *watchpoint = target->watchpoints;
-
- /* set any pending watchpoints */
- while (watchpoint) {
- if (!watchpoint->set)
- cortex_m_set_watchpoint(target, watchpoint);
- watchpoint = watchpoint->next;
- }
-}
-
-static int cortex_m_load_core_reg_u32(struct target *target,
- uint32_t num, uint32_t *value)
-{
- int retval;
-
- /* 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 = cortexm_dap_read_coreregister_u32(target, value, num);
-
- if (retval != ERROR_OK) {
- LOG_ERROR("JTAG failure %i", retval);
- return ERROR_JTAG_DEVICE_ERROR;
- }
- LOG_DEBUG("load from core reg %i value 0x%" PRIx32 "", (int)num, *value);
- break;
-
- case ARMV7M_FPSCR:
- /* Floating-point Status and Registers */
- retval = target_write_u32(target, DCB_DCRSR, 0x21);
- if (retval != ERROR_OK)
- return retval;
- retval = target_read_u32(target, DCB_DCRDR, value);
- if (retval != ERROR_OK)
- return retval;
- LOG_DEBUG("load from FPSCR value 0x%" PRIx32, *value);
- break;
-
- case ARMV7M_S0 ... ARMV7M_S31:
- /* Floating-point Status and Registers */
- retval = target_write_u32(target, DCB_DCRSR, num - ARMV7M_S0 + 0x40);
- if (retval != ERROR_OK)
- return retval;
- retval = target_read_u32(target, DCB_DCRDR, value);
- if (retval != ERROR_OK)
- return retval;
- LOG_DEBUG("load from FPU reg S%d value 0x%" PRIx32,
- (int)(num - ARMV7M_S0), *value);
- break;
-
- case ARMV7M_PRIMASK:
- case ARMV7M_BASEPRI:
- case ARMV7M_FAULTMASK:
- case ARMV7M_CONTROL:
- /* Cortex-M3 packages these four registers as bitfields
- * in one Debug Core register. So say r0 and r2 docs;
- * it was removed from r1 docs, but still works.
- */
- cortexm_dap_read_coreregister_u32(target, value, 20);
-
- switch (num) {
- case ARMV7M_PRIMASK:
- *value = buf_get_u32((uint8_t *)value, 0, 1);
- break;
+ if (target->debug_reason != DBG_REASON_WATCHPOINT)
+ return ERROR_FAIL;
- case ARMV7M_BASEPRI:
- *value = buf_get_u32((uint8_t *)value, 8, 8);
- break;
+ struct cortex_m_common *cortex_m = target_to_cm(target);
- case ARMV7M_FAULTMASK:
- *value = buf_get_u32((uint8_t *)value, 16, 1);
- break;
+ for (struct watchpoint *wp = target->watchpoints; wp; wp = wp->next) {
+ if (!wp->set)
+ continue;
- case ARMV7M_CONTROL:
- *value = buf_get_u32((uint8_t *)value, 24, 2);
- break;
- }
+ unsigned int dwt_num = wp->set - 1;
+ struct cortex_m_dwt_comparator *comparator = cortex_m->dwt_comparator_list + dwt_num;
- LOG_DEBUG("load from special reg %i value 0x%" PRIx32 "", (int)num, *value);
- break;
+ uint32_t dwt_function;
+ int retval = target_read_u32(target, comparator->dwt_comparator_address + 8, &dwt_function);
+ if (retval != ERROR_OK)
+ return ERROR_FAIL;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
+ /* check the MATCHED bit */
+ if (dwt_function & BIT(24)) {
+ *hit_watchpoint = wp;
+ return ERROR_OK;
+ }
}
- return ERROR_OK;
+ return ERROR_FAIL;
}
-static int cortex_m_store_core_reg_u32(struct target *target,
- uint32_t num, uint32_t value)
+void cortex_m_enable_watchpoints(struct target *target)
{
- int retval;
- uint32_t reg;
- struct armv7m_common *armv7m = target_to_armv7m(target);
-
- /* 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 = cortexm_dap_write_coreregister_u32(target, value, num);
- if (retval != ERROR_OK) {
- struct reg *r;
-
- LOG_ERROR("JTAG failure");
- r = armv7m->arm.core_cache->reg_list + num;
- r->dirty = r->valid;
- return ERROR_JTAG_DEVICE_ERROR;
- }
- LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", (int)num, value);
- break;
-
- case ARMV7M_FPSCR:
- /* Floating-point Status and Registers */
- retval = target_write_u32(target, DCB_DCRDR, value);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, DCB_DCRSR, 0x21 | (1<<16));
- if (retval != ERROR_OK)
- return retval;
- LOG_DEBUG("write FPSCR value 0x%" PRIx32, value);
- break;
-
- case ARMV7M_S0 ... ARMV7M_S31:
- /* Floating-point Status and Registers */
- retval = target_write_u32(target, DCB_DCRDR, value);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, DCB_DCRSR, (num - ARMV7M_S0 + 0x40) | (1<<16));
- if (retval != ERROR_OK)
- return retval;
- LOG_DEBUG("write FPU reg S%d value 0x%" PRIx32,
- (int)(num - ARMV7M_S0), value);
- break;
-
- case ARMV7M_PRIMASK:
- case ARMV7M_BASEPRI:
- case ARMV7M_FAULTMASK:
- case ARMV7M_CONTROL:
- /* Cortex-M3 packages these four registers as bitfields
- * in one Debug Core register. So say r0 and r2 docs;
- * it was removed from r1 docs, but still works.
- */
- cortexm_dap_read_coreregister_u32(target, ®, 20);
-
- switch (num) {
- case ARMV7M_PRIMASK:
- buf_set_u32((uint8_t *)®, 0, 1, value);
- break;
-
- case ARMV7M_BASEPRI:
- buf_set_u32((uint8_t *)®, 8, 8, value);
- break;
-
- case ARMV7M_FAULTMASK:
- buf_set_u32((uint8_t *)®, 16, 1, value);
- break;
-
- case ARMV7M_CONTROL:
- buf_set_u32((uint8_t *)®, 24, 2, value);
- break;
- }
-
- cortexm_dap_write_coreregister_u32(target, reg, 20);
-
- LOG_DEBUG("write special reg %i value 0x%" PRIx32 " ", (int)num, value);
- break;
+ struct watchpoint *watchpoint = target->watchpoints;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
+ /* set any pending watchpoints */
+ while (watchpoint) {
+ if (!watchpoint->set)
+ cortex_m_set_watchpoint(target, watchpoint);
+ watchpoint = watchpoint->next;
}
-
- return ERROR_OK;
}
static int cortex_m_read_memory(struct target *target, target_addr_t address,
{
struct armv7m_common *armv7m = target_to_armv7m(target);
- if (armv7m->arm.is_armv6m) {
+ if (armv7m->arm.arch == ARM_ARCH_V6M) {
/* armv6m does not handle unaligned memory access */
if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
return ERROR_TARGET_UNALIGNED_ACCESS;
{
struct armv7m_common *armv7m = target_to_armv7m(target);
- if (armv7m->arm.is_armv6m) {
+ if (armv7m->arm.arch == ARM_ARCH_V6M) {
/* armv6m does not handle unaligned memory access */
if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
return ERROR_TARGET_UNALIGNED_ACCESS;
struct timeval timeout, now;
struct armv7m_common *armv7m = target_to_armv7m(target);
uint32_t reg_value;
- bool use_pcsr = false;
- int retval = ERROR_OK;
- struct reg *reg;
-
- gettimeofday(&timeout, NULL);
- timeval_add_time(&timeout, seconds, 0);
+ int retval;
retval = target_read_u32(target, DWT_PCSR, ®_value);
if (retval != ERROR_OK) {
LOG_ERROR("Error while reading PCSR");
return retval;
}
-
- if (reg_value != 0) {
- use_pcsr = true;
- LOG_INFO("Starting Cortex-M profiling. Sampling DWT_PCSR as fast as we can...");
- } else {
- LOG_INFO("Starting profiling. Halting and resuming the"
- " target as often as we can...");
- reg = register_get_by_name(target->reg_cache, "pc", 1);
+ if (reg_value == 0) {
+ LOG_INFO("PCSR sampling not supported on this processor.");
+ return target_profiling_default(target, samples, max_num_samples, num_samples, seconds);
}
+ gettimeofday(&timeout, NULL);
+ timeval_add_time(&timeout, seconds, 0);
+
+ LOG_INFO("Starting Cortex-M profiling. Sampling DWT_PCSR as fast as we can...");
+
/* Make sure the target is running */
target_poll(target);
if (target->state == TARGET_HALTED)
uint32_t sample_count = 0;
for (;;) {
- if (use_pcsr) {
- if (armv7m && armv7m->debug_ap) {
- uint32_t read_count = max_num_samples - sample_count;
- if (read_count > 1024)
- read_count = 1024;
-
- retval = mem_ap_read_buf_noincr(armv7m->debug_ap,
- (void *)&samples[sample_count],
- 4, read_count, DWT_PCSR);
- sample_count += read_count;
- } else {
- target_read_u32(target, DWT_PCSR, &samples[sample_count++]);
- }
+ if (armv7m && armv7m->debug_ap) {
+ uint32_t read_count = max_num_samples - sample_count;
+ if (read_count > 1024)
+ read_count = 1024;
+
+ retval = mem_ap_read_buf_noincr(armv7m->debug_ap,
+ (void *)&samples[sample_count],
+ 4, read_count, DWT_PCSR);
+ sample_count += read_count;
} else {
- target_poll(target);
- if (target->state == TARGET_HALTED) {
- reg_value = buf_get_u32(reg->value, 0, 32);
- /* current pc, addr = 0, do not handle breakpoints, not debugging */
- retval = target_resume(target, 1, 0, 0, 0);
- samples[sample_count++] = reg_value;
- target_poll(target);
- alive_sleep(10); /* sleep 10ms, i.e. <100 samples/second. */
- } else if (target->state == TARGET_RUNNING) {
- /* We want to quickly sample the PC. */
- retval = target_halt(target);
- } else {
- LOG_INFO("Target not halted or running");
- retval = ERROR_OK;
- break;
- }
+ target_read_u32(target, DWT_PCSR, &samples[sample_count++]);
}
if (retval != ERROR_OK) {
- LOG_ERROR("Error while reading %s", use_pcsr ? "PCSR" : "target pc");
+ LOG_ERROR("Error while reading PCSR");
return retval;
}
r->type = &dwt_reg_type;
}
-void cortex_m_dwt_setup(struct cortex_m_common *cm, struct target *target)
+static void cortex_m_dwt_setup(struct cortex_m_common *cm, struct target *target)
{
uint32_t dwtcr;
struct reg_cache *cache;
struct cortex_m_dwt_comparator *comparator;
- int reg, i;
+ int reg;
target_read_u32(target, DWT_CTRL, &dwtcr);
LOG_DEBUG("DWT_CTRL: 0x%" PRIx32, dwtcr);
dwt_base_regs + reg);
comparator = cm->dwt_comparator_list;
- for (i = 0; i < cm->dwt_num_comp; i++, comparator++) {
+ for (unsigned int i = 0; i < cm->dwt_num_comp; i++, comparator++) {
int j;
comparator->dwt_comparator_address = DWT_COMP0 + 0x10 * i;
{
int retval;
uint32_t cpuid, fpcr, mvfr0, mvfr1;
- int i;
struct cortex_m_common *cortex_m = target_to_cm(target);
struct adiv5_dap *swjdp = cortex_m->armv7m.arm.dap;
struct armv7m_common *armv7m = target_to_armv7m(target);
- /* stlink shares the examine handler but does not support
+ /* hla_target shares the examine handler but does not support
* all its calls */
- if (!armv7m->stlink) {
+ if (!armv7m->is_hla_target) {
if (cortex_m->apsel == DP_APSEL_INVALID) {
/* Search for the MEM-AP */
retval = cortex_m_find_mem_ap(swjdp, &armv7m->debug_ap);
if (retval != ERROR_OK)
return retval;
- /* Get CPU Type */
- i = (cpuid >> 4) & 0xf;
+ /* Get ARCH and CPU types */
+ const enum cortex_m_partno core_partno = (cpuid & ARM_CPUID_PARTNO_MASK) >> ARM_CPUID_PARTNO_POS;
- /* Check if it is an ARMv8-M core */
- armv7m->arm.is_armv8m = true;
-
- switch (cpuid & ARM_CPUID_PARTNO_MASK) {
- case CORTEX_M23_PARTNO:
- i = 23;
- break;
-
- case CORTEX_M33_PARTNO:
- i = 33;
+ for (unsigned int n = 0; n < ARRAY_SIZE(cortex_m_parts); n++) {
+ if (core_partno == cortex_m_parts[n].partno) {
+ cortex_m->core_info = &cortex_m_parts[n];
break;
+ }
+ }
- default:
- armv7m->arm.is_armv8m = false;
- break;
+ if (!cortex_m->core_info) {
+ LOG_ERROR("Cortex-M PARTNO 0x%x is unrecognized", core_partno);
+ return ERROR_FAIL;
}
+ armv7m->arm.arch = cortex_m->core_info->arch;
+
+ LOG_INFO("%s: %s r%" PRId8 "p%" PRId8 " processor detected",
+ target_name(target),
+ cortex_m->core_info->name,
+ (uint8_t)((cpuid >> 20) & 0xf),
+ (uint8_t)((cpuid >> 0) & 0xf));
- LOG_DEBUG("Cortex-M%d r%" PRId8 "p%" PRId8 " processor detected",
- i, (uint8_t)((cpuid >> 20) & 0xf), (uint8_t)((cpuid >> 0) & 0xf));
cortex_m->maskints_erratum = false;
- if (i == 7) {
+ if (core_partno == CORTEX_M7_PARTNO) {
uint8_t rev, patch;
rev = (cpuid >> 20) & 0xf;
patch = (cpuid >> 0) & 0xf;
}
LOG_DEBUG("cpuid: 0x%8.8" PRIx32 "", cpuid);
- /* VECTRESET is not supported on Cortex-M0, M0+ and M1 */
- cortex_m->vectreset_supported = i > 1;
-
- if (i == 4) {
+ if (cortex_m->core_info->flags & CORTEX_M_F_HAS_FPV4) {
target_read_u32(target, MVFR0, &mvfr0);
target_read_u32(target, MVFR1, &mvfr1);
/* test for floating point feature on Cortex-M4 */
if ((mvfr0 == MVFR0_DEFAULT_M4) && (mvfr1 == MVFR1_DEFAULT_M4)) {
- LOG_DEBUG("Cortex-M%d floating point feature FPv4_SP found", i);
- armv7m->fp_feature = FPv4_SP;
+ LOG_DEBUG("%s floating point feature FPv4_SP found", cortex_m->core_info->name);
+ armv7m->fp_feature = FPV4_SP;
}
- } else if (i == 7 || i == 33) {
+ } else if (cortex_m->core_info->flags & CORTEX_M_F_HAS_FPV5) {
target_read_u32(target, MVFR0, &mvfr0);
target_read_u32(target, MVFR1, &mvfr1);
/* test for floating point features on Cortex-M7 */
if ((mvfr0 == MVFR0_DEFAULT_M7_SP) && (mvfr1 == MVFR1_DEFAULT_M7_SP)) {
- LOG_DEBUG("Cortex-M%d floating point feature FPv5_SP found", i);
- armv7m->fp_feature = FPv5_SP;
+ LOG_DEBUG("%s floating point feature FPv5_SP found", cortex_m->core_info->name);
+ armv7m->fp_feature = FPV5_SP;
} else if ((mvfr0 == MVFR0_DEFAULT_M7_DP) && (mvfr1 == MVFR1_DEFAULT_M7_DP)) {
- LOG_DEBUG("Cortex-M%d floating point feature FPv5_DP found", i);
- armv7m->fp_feature = FPv5_DP;
+ LOG_DEBUG("%s floating point feature FPv5_DP found", cortex_m->core_info->name);
+ armv7m->fp_feature = FPV5_DP;
}
- } else if (i == 0) {
- /* Cortex-M0 does not support unaligned memory access */
- armv7m->arm.is_armv6m = true;
}
- if (armv7m->fp_feature == FP_NONE &&
- armv7m->arm.core_cache->num_regs > ARMV7M_NUM_CORE_REGS_NOFP) {
- /* free unavailable FPU registers */
- size_t idx;
-
- for (idx = ARMV7M_NUM_CORE_REGS_NOFP;
- idx < armv7m->arm.core_cache->num_regs;
- idx++) {
- free(armv7m->arm.core_cache->reg_list[idx].value);
- free(armv7m->arm.core_cache->reg_list[idx].feature);
- free(armv7m->arm.core_cache->reg_list[idx].reg_data_type);
- }
- armv7m->arm.core_cache->num_regs = ARMV7M_NUM_CORE_REGS_NOFP;
- }
+ /* VECTRESET is supported only on ARMv7-M cores */
+ cortex_m->vectreset_supported = armv7m->arm.arch == ARM_ARCH_V7M;
+
+ /* Check for FPU, otherwise mark FPU register as non-existent */
+ if (armv7m->fp_feature == FP_NONE)
+ for (size_t idx = ARMV7M_FPU_FIRST_REG; idx <= ARMV7M_FPU_LAST_REG; idx++)
+ armv7m->arm.core_cache->reg_list[idx].exist = false;
- if (!armv7m->stlink) {
- if (i == 3 || i == 4)
+ if (armv7m->arm.arch != ARM_ARCH_V8M)
+ for (size_t idx = ARMV8M_FIRST_REG; idx <= ARMV8M_LAST_REG; idx++)
+ armv7m->arm.core_cache->reg_list[idx].exist = false;
+
+ if (!armv7m->is_hla_target) {
+ if (cortex_m->core_info->flags & CORTEX_M_F_TAR_AUTOINCR_BLOCK_4K)
/* Cortex-M3/M4 have 4096 bytes autoincrement range,
* s. ARM IHI 0031C: MEM-AP 7.2.2 */
armv7m->debug_ap->tar_autoincr_block = (1 << 12);
- else if (i == 7)
- /* Cortex-M7 has only 1024 bytes autoincrement range */
- armv7m->debug_ap->tar_autoincr_block = (1 << 10);
}
- /* Enable debug requests */
retval = target_read_u32(target, DCB_DHCSR, &cortex_m->dcb_dhcsr);
if (retval != ERROR_OK)
return retval;
+ cortex_m_cumulate_dhcsr_sticky(cortex_m, cortex_m->dcb_dhcsr);
+
if (!(cortex_m->dcb_dhcsr & C_DEBUGEN)) {
+ /* Enable debug requests */
uint32_t dhcsr = (cortex_m->dcb_dhcsr | C_DEBUGEN) & ~(C_HALT | C_STEP | C_MASKINTS);
retval = target_write_u32(target, DCB_DHCSR, DBGKEY | (dhcsr & 0x0000FFFFUL));
if (retval != ERROR_OK)
return retval;
- if (armv7m->trace_config.config_type != TRACE_CONFIG_TYPE_DISABLED) {
- armv7m_trace_tpiu_config(target);
+ if (armv7m->trace_config.itm_deferred_config)
armv7m_trace_itm_config(target);
- }
/* NOTE: FPB and DWT are both optional. */
cortex_m->fp_num_code + cortex_m->fp_num_lit,
sizeof(struct cortex_m_fp_comparator));
cortex_m->fpb_enabled = fpcr & 1;
- for (i = 0; i < cortex_m->fp_num_code + cortex_m->fp_num_lit; i++) {
+ for (unsigned int i = 0; i < cortex_m->fp_num_code + cortex_m->fp_num_lit; i++) {
cortex_m->fp_comparator_list[i].type =
(i < cortex_m->fp_num_code) ? FPCR_CODE : FPCR_LITERAL;
cortex_m->fp_comparator_list[i].fpcr_address = FP_COMP0 + 4 * i;
cortex_m_dwt_setup(cortex_m, target);
/* These hardware breakpoints only work for code in flash! */
- LOG_INFO("%s: hardware has %d breakpoints, %d watchpoints",
+ LOG_INFO("%s: target has %d breakpoints, %d watchpoints",
target_name(target),
cortex_m->fp_num_code,
cortex_m->dwt_num_comp);
return ERROR_FAIL;
struct cortex_m_common *cortex_m = calloc(1, sizeof(struct cortex_m_common));
- if (cortex_m == NULL) {
+ if (!cortex_m) {
LOG_ERROR("No memory creating target");
return ERROR_FAIL;
}
if (retval != ERROR_OK)
return retval;
+ if (!target_was_examined(target)) {
+ LOG_ERROR("Target not examined yet");
+ return ERROR_FAIL;
+ }
+
retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DEMCR, &demcr);
if (retval != ERROR_OK)
return retval;
struct cortex_m_common *cortex_m = target_to_cm(target);
int retval;
- static const Jim_Nvp nvp_maskisr_modes[] = {
+ static const struct jim_nvp nvp_maskisr_modes[] = {
{ .name = "auto", .value = CORTEX_M_ISRMASK_AUTO },
{ .name = "off", .value = CORTEX_M_ISRMASK_OFF },
{ .name = "on", .value = CORTEX_M_ISRMASK_ON },
{ .name = "steponly", .value = CORTEX_M_ISRMASK_STEPONLY },
{ .name = NULL, .value = -1 },
};
- const Jim_Nvp *n;
+ const struct jim_nvp *n;
retval = cortex_m_verify_pointer(CMD, cortex_m);
}
if (CMD_ARGC > 0) {
- n = Jim_Nvp_name2value_simple(nvp_maskisr_modes, CMD_ARGV[0]);
- if (n->name == NULL)
+ n = jim_nvp_name2value_simple(nvp_maskisr_modes, CMD_ARGV[0]);
+ if (!n->name)
return ERROR_COMMAND_SYNTAX_ERROR;
cortex_m->isrmasking_mode = n->value;
cortex_m_set_maskints_for_halt(target);
}
- n = Jim_Nvp_value2name_simple(nvp_maskisr_modes, cortex_m->isrmasking_mode);
+ n = jim_nvp_value2name_simple(nvp_maskisr_modes, cortex_m->isrmasking_mode);
command_print(CMD, "cortex_m interrupt mask %s", n->name);
return ERROR_OK;
{
.chain = armv7m_trace_command_handlers,
},
+ /* START_DEPRECATED_TPIU */
+ {
+ .chain = arm_tpiu_deprecated_command_handlers,
+ },
+ /* END_DEPRECATED_TPIU */
{
.name = "cortex_m",
.mode = COMMAND_EXEC,
.usage = "",
.chain = cortex_m_exec_command_handlers,
},
+ {
+ .chain = rtt_target_command_handlers,
+ },
COMMAND_REGISTRATION_DONE
};
struct target_type cortexm_target = {
.name = "cortex_m",
- .deprecated_name = "cortex_m3",
.poll = cortex_m_poll,
.arch_state = armv7m_arch_state,
.remove_breakpoint = cortex_m_remove_breakpoint,
.add_watchpoint = cortex_m_add_watchpoint,
.remove_watchpoint = cortex_m_remove_watchpoint,
+ .hit_watchpoint = cortex_m_hit_watchpoint,
.commands = cortex_m_command_handlers,
.target_create = cortex_m_target_create,
Code Review / openocd.git / blobdiff