X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Fcortex_m.c;h=d4affa6831fdcd202031d99d9817b72dae0df03c;hp=4bada398dcda43cb86536720b6747dabe6db8514;hb=111dcbeb1a54f629866449efe0c3b17ec1ab8957;hpb=351ef7bf3cce048ec854c8d19d8af5aa2b97c3a9 diff --git a/src/target/cortex_m.c b/src/target/cortex_m.c index 4bada398dc..d4affa6831 100644 --- a/src/target/cortex_m.c +++ b/src/target/cortex_m.c @@ -34,11 +34,13 @@ #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 +#include /* NOTE: most of this should work fine for the Cortex-M1 and * Cortex-M0 cores too, although they're ARMv6-M not ARMv7-M. @@ -51,13 +53,73 @@ * 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) +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; @@ -71,7 +133,7 @@ static int cortexm_dap_read_coreregister_u32(struct target *target, 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; @@ -89,8 +151,8 @@ static int cortexm_dap_read_coreregister_u32(struct target *target, 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; @@ -108,12 +170,12 @@ static int cortexm_dap_write_coreregister_u32(struct target *target, 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; if (target->dbg_msg_enabled) { - /* restore DCB_DCRDR - this needs to be in a seperate + /* restore DCB_DCRDR - this needs to be in a separate * transaction otherwise the emulated DCC channel breaks */ if (retval == ERROR_OK) retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DCRDR, dcrdr); @@ -129,13 +191,90 @@ static int cortex_m_write_debug_halt_mask(struct target *target, struct armv7m_common *armv7m = &cortex_m->armv7m; /* mask off status bits */ - cortex_m->dcb_dhcsr &= ~((0xFFFF << 16) | mask_off); + cortex_m->dcb_dhcsr &= ~((0xFFFFul << 16) | mask_off); /* create new register mask */ cortex_m->dcb_dhcsr |= DBGKEY | C_DEBUGEN | mask_on; return mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DHCSR, cortex_m->dcb_dhcsr); } +static int cortex_m_set_maskints(struct target *target, bool mask) +{ + struct cortex_m_common *cortex_m = target_to_cm(target); + if (!!(cortex_m->dcb_dhcsr & C_MASKINTS) != mask) + return cortex_m_write_debug_halt_mask(target, mask ? C_MASKINTS : 0, mask ? 0 : C_MASKINTS); + else + return ERROR_OK; +} + +static int cortex_m_set_maskints_for_halt(struct target *target) +{ + struct cortex_m_common *cortex_m = target_to_cm(target); + switch (cortex_m->isrmasking_mode) { + case CORTEX_M_ISRMASK_AUTO: + /* interrupts taken at resume, whether for step or run -> no mask */ + return cortex_m_set_maskints(target, false); + + case CORTEX_M_ISRMASK_OFF: + /* interrupts never masked */ + return cortex_m_set_maskints(target, false); + + case CORTEX_M_ISRMASK_ON: + /* interrupts always masked */ + return cortex_m_set_maskints(target, true); + + case CORTEX_M_ISRMASK_STEPONLY: + /* interrupts masked for single step only -> mask now if MASKINTS + * erratum, otherwise only mask before stepping */ + return cortex_m_set_maskints(target, cortex_m->maskints_erratum); + } + return ERROR_OK; +} + +static int cortex_m_set_maskints_for_run(struct target *target) +{ + switch (target_to_cm(target)->isrmasking_mode) { + case CORTEX_M_ISRMASK_AUTO: + /* interrupts taken at resume, whether for step or run -> no mask */ + return cortex_m_set_maskints(target, false); + + case CORTEX_M_ISRMASK_OFF: + /* interrupts never masked */ + return cortex_m_set_maskints(target, false); + + case CORTEX_M_ISRMASK_ON: + /* interrupts always masked */ + return cortex_m_set_maskints(target, true); + + case CORTEX_M_ISRMASK_STEPONLY: + /* interrupts masked for single step only -> no mask */ + return cortex_m_set_maskints(target, false); + } + return ERROR_OK; +} + +static int cortex_m_set_maskints_for_step(struct target *target) +{ + switch (target_to_cm(target)->isrmasking_mode) { + case CORTEX_M_ISRMASK_AUTO: + /* the auto-interrupt should already be done -> mask */ + return cortex_m_set_maskints(target, true); + + case CORTEX_M_ISRMASK_OFF: + /* interrupts never masked */ + return cortex_m_set_maskints(target, false); + + case CORTEX_M_ISRMASK_ON: + /* interrupts always masked */ + return cortex_m_set_maskints(target, true); + + case CORTEX_M_ISRMASK_STEPONLY: + /* interrupts masked for single step only -> mask */ + return cortex_m_set_maskints(target, true); + } + return ERROR_OK; +} + static int cortex_m_clear_halt(struct target *target) { struct cortex_m_common *cortex_m = target_to_cm(target); @@ -162,7 +301,6 @@ static int cortex_m_clear_halt(struct target *target) 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 @@ -170,13 +308,11 @@ static int cortex_m_single_step_core(struct target *target) * 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(" "); @@ -207,7 +343,6 @@ static int cortex_m_enable_fpb(struct target *target) 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); @@ -237,11 +372,8 @@ static int cortex_m_endreset_event(struct target *target) return retval; } - /* Restore proper interrupt masking setting. */ - if (cortex_m->isrmasking_mode == CORTEX_M_ISRMASK_ON) - cortex_m_write_debug_halt_mask(target, C_MASKINTS, 0); - else - cortex_m_write_debug_halt_mask(target, 0, C_MASKINTS); + /* Restore proper interrupt masking setting for running CPU. */ + cortex_m_set_maskints_for_run(target); /* Enable features controlled by ITM and DWT blocks, and catch only * the vectors we were told to pay attention to. @@ -268,14 +400,14 @@ static int cortex_m_endreset_event(struct target *target) 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) @@ -318,7 +450,9 @@ static int cortex_m_examine_debug_reason(struct target *target) target->debug_reason = DBG_REASON_WATCHPOINT; else if (cortex_m->nvic_dfsr & DFSR_VCATCH) target->debug_reason = DBG_REASON_BREAKPOINT; - else /* EXTERNAL, HALTED */ + else if (cortex_m->nvic_dfsr & DFSR_EXTERNAL) + target->debug_reason = DBG_REASON_DBGRQ; + else /* HALTED */ target->debug_reason = DBG_REASON_UNDEFINED; } @@ -369,6 +503,14 @@ static int cortex_m_examine_exception_reason(struct target *target) if (retval != ERROR_OK) return retval; break; + case 7: /* Secure Fault */ + retval = mem_ap_read_u32(armv7m->debug_ap, NVIC_SFSR, &except_sr); + if (retval != ERROR_OK) + return retval; + retval = mem_ap_read_u32(armv7m->debug_ap, NVIC_SFAR, &except_ar); + if (retval != ERROR_OK) + return retval; + break; case 11: /* SVCall */ break; case 12: /* Debug Monitor */ @@ -405,6 +547,10 @@ static int cortex_m_debug_entry(struct target *target) LOG_DEBUG(" "); + /* Do this really early to minimize the window where the MASKINTS erratum + * can pile up pending interrupts. */ + 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); if (retval != ERROR_OK) @@ -414,25 +560,31 @@ static int cortex_m_debug_entry(struct target *target) if (retval != ERROR_OK) return retval; + /* examine PE security state */ + bool secure_state = false; + if (armv7m->arm.arch == ARM_ARCH_V8M) { + uint32_t dscsr; + + retval = mem_ap_read_u32(armv7m->debug_ap, DCB_DSCSR, &dscsr); + if (retval != ERROR_OK) + return retval; + + secure_state = (dscsr & DSCSR_CDS) == DSCSR_CDS; + } + /* Examine target state and mode * First load register accessible through core debug port */ int num_regs = arm->core_cache->num_regs; 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); @@ -441,7 +593,7 @@ static int cortex_m_debug_entry(struct target *target) 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 @@ -460,9 +612,10 @@ static int cortex_m_debug_entry(struct target *target) if (armv7m->exception_number) cortex_m_examine_exception_reason(target); - LOG_DEBUG("entered debug state in core mode: %s at PC 0x%" PRIx32 ", target->state: %s", + LOG_DEBUG("entered debug state in core mode: %s at PC 0x%" PRIx32 ", cpu in %s state, target->state: %s", arm_mode_name(arm->core_mode), buf_get_u32(arm->pc->value, 0, 32), + secure_state ? "Secure" : "Non-Secure", target_state_name(target)); if (armv7m->post_debug_entry) { @@ -555,13 +708,9 @@ static int cortex_m_poll(struct target *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 */ + if (cortex_m->dcb_dhcsr & S_RETIRE_ST || cortex_m->dcb_dhcsr & S_SLEEP) { target->state = TARGET_RUNNING; retval = ERROR_OK; } @@ -614,6 +763,10 @@ static int cortex_m_halt(struct target *target) /* Write to Debug Halting Control and Status Register */ cortex_m_write_debug_halt_mask(target, C_HALT, 0); + /* Do this really early to minimize the window where the MASKINTS erratum + * can pile up pending interrupts. */ + cortex_m_set_maskints_for_halt(target); + target->debug_reason = DBG_REASON_DBGRQ; return ERROR_OK; @@ -623,14 +776,23 @@ static int cortex_m_soft_reset_halt(struct target *target) { 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; - /* soft_reset_halt is deprecated on cortex_m as the same functionality - * can be obtained by using 'reset halt' and 'cortex_m reset_config vectreset' - * As this reset only used VC_CORERESET it would only ever reset the cortex_m + /* on single cortex_m MCU soft_reset_halt should be avoided as same functionality + * can be obtained by using 'reset halt' and 'cortex_m reset_config vectreset'. + * As this reset only uses VC_CORERESET it would only ever reset the cortex_m * core, not the peripherals */ - LOG_WARNING("soft_reset_halt is deprecated, please use 'reset halt' instead."); + 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) + return retval; /* Enter debug state on reset; restore DEMCR in endreset_event() */ retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DEMCR, @@ -649,25 +811,23 @@ static int cortex_m_soft_reset_halt(struct target *target) 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 = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr); 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); @@ -717,15 +877,19 @@ static int cortex_m_resume(struct target *target, int current, * 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; @@ -767,6 +931,7 @@ static int cortex_m_resume(struct target *target, int current, } /* Restart core */ + cortex_m_set_maskints_for_run(target); cortex_m_write_debug_halt_mask(target, 0, C_HALT); target->debug_reason = DBG_REASON_NOTHALTED; @@ -805,8 +970,11 @@ static int cortex_m_step(struct target *target, int current, } /* current = 1: continue on current pc, otherwise continue at
*/ - 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); @@ -829,10 +997,12 @@ static int cortex_m_step(struct target *target, int current, * 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_m->isrmasking_mode != CORTEX_M_ISRMASK_AUTO)) + if (cortex_m->isrmasking_mode != CORTEX_M_ISRMASK_AUTO) { + /* Automatic ISR masking mode off: Just step over the next + * instruction, with interrupts on or off as appropriate. */ + cortex_m_set_maskints_for_step(target); cortex_m_write_debug_halt_mask(target, C_STEP, C_HALT); - else { + } else { /* Process interrupts during stepping in a way they don't interfere * debugging. * @@ -859,7 +1029,7 @@ static int cortex_m_step(struct target *target, int current, * just step over the instruction with interrupts disabled. * * The documentation has no information about this, it was found by observation - * on STM32F1 and STM32F2. Proper explanation welcome. STM32F0 dosen't seem to + * on STM32F1 and STM32F2. Proper explanation welcome. STM32F0 doesn't seem to * suffer from this problem. * * To add some confusion: pc_value has bit 0 always set, while the breakpoint @@ -871,10 +1041,10 @@ static int cortex_m_step(struct target *target, int current, LOG_DEBUG("Stepping over next instruction with interrupts disabled"); cortex_m_write_debug_halt_mask(target, C_HALT | C_MASKINTS, 0); cortex_m_write_debug_halt_mask(target, C_STEP, C_HALT); - /* Re-enable interrupts */ - cortex_m_write_debug_halt_mask(target, C_HALT, C_MASKINTS); - } - else { + /* Re-enable interrupts if appropriate */ + cortex_m_write_debug_halt_mask(target, C_HALT, 0); + cortex_m_set_maskints_for_halt(target); + } else { /* Set a temporary break point */ if (breakpoint) { @@ -891,12 +1061,17 @@ static int cortex_m_step(struct target *target, int current, bool tmp_bp_set = (retval == ERROR_OK); /* No more breakpoints left, just do a step */ - if (!tmp_bp_set) + if (!tmp_bp_set) { + cortex_m_set_maskints_for_step(target); cortex_m_write_debug_halt_mask(target, C_STEP, C_HALT); - else { + /* Re-enable interrupts if appropriate */ + cortex_m_write_debug_halt_mask(target, C_HALT, 0); + cortex_m_set_maskints_for_halt(target); + } else { /* Start the core */ LOG_DEBUG("Starting core to serve pending interrupts"); int64_t t_start = timeval_ms(); + cortex_m_set_maskints_for_run(target); cortex_m_write_debug_halt_mask(target, 0, C_HALT | C_STEP); /* Wait for pending handlers to complete or timeout */ @@ -924,12 +1099,14 @@ static int cortex_m_step(struct target *target, int current, "leaving target running"); } else { /* Step over next instruction with interrupts disabled */ + cortex_m_set_maskints_for_step(target); cortex_m_write_debug_halt_mask(target, C_HALT | C_MASKINTS, 0); cortex_m_write_debug_halt_mask(target, C_STEP, C_HALT); - /* Re-enable interrupts */ - cortex_m_write_debug_halt_mask(target, C_HALT, C_MASKINTS); + /* Re-enable interrupts if appropriate */ + cortex_m_write_debug_halt_mask(target, C_HALT, 0); + cortex_m_set_maskints_for_halt(target); } } } @@ -1031,8 +1208,7 @@ static int cortex_m_assert_reset(struct target *target) if (!target->reset_halt) { /* Set/Clear C_MASKINTS in a separate operation */ - if (cortex_m->dcb_dhcsr & C_MASKINTS) - cortex_m_write_debug_halt_mask(target, 0, C_MASKINTS); + cortex_m_set_maskints_for_run(target); /* clear any debug flags before resuming */ cortex_m_clear_halt(target); @@ -1062,7 +1238,7 @@ static int cortex_m_assert_reset(struct target *target) 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. @@ -1089,11 +1265,13 @@ static int cortex_m_assert_reset(struct target *target) 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 @@ -1104,7 +1282,7 @@ static int cortex_m_assert_reset(struct target *target) } target->state = TARGET_RESET; - jtag_add_sleep(50000); + jtag_sleep(50000); register_cache_invalidate(cortex_m->armv7m.arm.core_cache); @@ -1136,7 +1314,8 @@ static int cortex_m_deassert_reset(struct target *target) 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; @@ -1149,7 +1328,7 @@ static int cortex_m_deassert_reset(struct target *target) 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; @@ -1164,7 +1343,7 @@ int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint fp_num++; if (fp_num >= cortex_m->fp_num_code) { LOG_ERROR("Can not find free FPB Comparator!"); - return ERROR_FAIL; + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; } breakpoint->set = fp_num + 1; fpcr_value = breakpoint->address | 1; @@ -1236,7 +1415,7 @@ int cortex_m_unset_breakpoint(struct target *target, struct breakpoint *breakpoi 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; } @@ -1249,8 +1428,8 @@ int cortex_m_unset_breakpoint(struct target *target, struct breakpoint *breakpoi 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; } @@ -1260,17 +1439,11 @@ int cortex_m_unset_breakpoint(struct target *target, struct breakpoint *breakpoi comparator_list[fp_num].fpcr_value); } else { /* restore original instruction (kept in target endianness) */ - if (breakpoint->length == 4) { - retval = target_write_memory(target, breakpoint->address & 0xFFFFFFFE, 4, 1, - breakpoint->orig_instr); - if (retval != ERROR_OK) - return retval; - } else { - retval = target_write_memory(target, breakpoint->address & 0xFFFFFFFE, 2, 1, + retval = target_write_memory(target, breakpoint->address & 0xFFFFFFFE, + breakpoint->length, 1, breakpoint->orig_instr); - if (retval != ERROR_OK) - return retval; - } + if (retval != ERROR_OK) + return retval; } breakpoint->set = false; @@ -1279,13 +1452,6 @@ int cortex_m_unset_breakpoint(struct target *target, struct breakpoint *breakpoi int cortex_m_add_breakpoint(struct target *target, struct breakpoint *breakpoint) { - struct cortex_m_common *cortex_m = target_to_cm(target); - - if ((breakpoint->type == BKPT_HARD) && (cortex_m->fp_code_available < 1)) { - LOG_INFO("no flash patch comparator unit available for hardware breakpoint"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - if (breakpoint->length == 3) { LOG_DEBUG("Using a two byte breakpoint for 32bit Thumb-2 request"); breakpoint->length = 2; @@ -1296,46 +1462,22 @@ int cortex_m_add_breakpoint(struct target *target, struct breakpoint *breakpoint return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; } - if (breakpoint->type == BKPT_HARD) - cortex_m->fp_code_available--; - return cortex_m_set_breakpoint(target, breakpoint); } int cortex_m_remove_breakpoint(struct target *target, struct breakpoint *breakpoint) { - struct cortex_m_common *cortex_m = target_to_cm(target); - - /* REVISIT why check? FPB can be updated with core running ... */ - if (target->state != TARGET_HALTED) { - LOG_WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (breakpoint->set) - cortex_m_unset_breakpoint(target, breakpoint); - - if (breakpoint->type == BKPT_HARD) - cortex_m->fp_code_available++; + if (!breakpoint->set) + return ERROR_OK; - 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; - uint32_t mask, temp; + unsigned int dwt_num = 0; struct cortex_m_common *cortex_m = target_to_cm(target); - /* watchpoint params were validated earlier */ - mask = 0; - temp = watchpoint->length; - while (temp) { - temp >>= 1; - mask++; - } - mask--; - /* 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 @@ -1358,11 +1500,22 @@ int cortex_m_set_watchpoint(struct target *target, struct watchpoint *watchpoint 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); + if ((cortex_m->dwt_devarch & 0x1FFFFF) != DWT_DEVARCH_ARMV8M) { + uint32_t mask = 0, temp; + + /* watchpoint params were validated earlier */ + temp = watchpoint->length; + while (temp) { + temp >>= 1; + mask++; + } + mask--; + + comparator->mask = mask; + target_write_u32(target, comparator->dwt_comparator_address + 4, + comparator->mask); - switch (watchpoint->rw) { + switch (watchpoint->rw) { case WPT_READ: comparator->function = 5; break; @@ -1372,7 +1525,26 @@ int cortex_m_set_watchpoint(struct target *target, struct watchpoint *watchpoint case WPT_ACCESS: comparator->function = 7; break; + } + } else { + uint32_t data_size = watchpoint->length >> 1; + comparator->mask = (watchpoint->length >> 1) | 1; + + switch (watchpoint->rw) { + case WPT_ACCESS: + comparator->function = 4; + break; + case WPT_WRITE: + comparator->function = 5; + break; + case WPT_READ: + comparator->function = 6; + break; + } + comparator->function = comparator->function | (1 << 4) | + (data_size << 10); } + target_write_u32(target, comparator->dwt_comparator_address + 8, comparator->function); @@ -1384,25 +1556,24 @@ int cortex_m_set_watchpoint(struct target *target, struct watchpoint *watchpoint 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; } @@ -1486,186 +1657,45 @@ int cortex_m_remove_watchpoint(struct target *target, struct watchpoint *watchpo 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, @@ -1673,7 +1703,7 @@ 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; @@ -1687,7 +1717,7 @@ static int cortex_m_write_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; @@ -1723,28 +1753,23 @@ int cortex_m_profiling(struct target *target, uint32_t *samples, 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) @@ -1758,40 +1783,21 @@ int cortex_m_profiling(struct target *target, uint32_t *samples, 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; } @@ -1888,7 +1894,7 @@ static void cortex_m_dwt_addreg(struct target *t, struct reg *r, const struct dw { struct dwt_reg_state *state; - state = calloc(1, sizeof *state); + state = calloc(1, sizeof(*state)); if (!state) return; state->addr = d->addr; @@ -1901,12 +1907,12 @@ static void cortex_m_dwt_addreg(struct target *t, struct reg *r, const struct dw 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); @@ -1915,6 +1921,9 @@ void cortex_m_dwt_setup(struct cortex_m_common *cm, struct target *target) return; } + target_read_u32(target, DWT_DEVARCH, &cm->dwt_devarch); + LOG_DEBUG("DWT_DEVARCH: 0x%" PRIx32, cm->dwt_devarch); + cm->dwt_num_comp = (dwtcr >> 28) & 0xF; cm->dwt_comp_available = cm->dwt_num_comp; cm->dwt_comparator_list = calloc(cm->dwt_num_comp, @@ -1926,7 +1935,7 @@ fail0: return; } - cache = calloc(1, sizeof *cache); + cache = calloc(1, sizeof(*cache)); if (!cache) { fail1: free(cm->dwt_comparator_list); @@ -1934,7 +1943,7 @@ fail1: } cache->name = "Cortex-M DWT registers"; cache->num_regs = 2 + cm->dwt_num_comp * 3; - cache->reg_list = calloc(cache->num_regs, sizeof *cache->reg_list); + cache->reg_list = calloc(cache->num_regs, sizeof(*cache->reg_list)); if (!cache->reg_list) { free(cache); goto fail1; @@ -1945,7 +1954,7 @@ fail1: 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; @@ -2003,21 +2012,29 @@ static void cortex_m_dwt_free(struct target *target) #define MVFR1_DEFAULT_M7_SP 0x11000011 #define MVFR1_DEFAULT_M7_DP 0x12000011 +static int cortex_m_find_mem_ap(struct adiv5_dap *swjdp, + struct adiv5_ap **debug_ap) +{ + if (dap_find_ap(swjdp, AP_TYPE_AHB3_AP, debug_ap) == ERROR_OK) + return ERROR_OK; + + return dap_find_ap(swjdp, AP_TYPE_AHB5_AP, debug_ap); +} + int cortex_m_examine(struct target *target) { 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 = dap_find_ap(swjdp, AP_TYPE_AHB_AP, &armv7m->debug_ap); + retval = cortex_m_find_mem_ap(swjdp, &armv7m->debug_ap); if (retval != ERROR_OK) { LOG_ERROR("Could not find MEM-AP to control the core"); return retval; @@ -2042,72 +2059,94 @@ int cortex_m_examine(struct target *target) 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; + + 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; + } + } + + 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_DEBUG("Cortex-M%d r%" PRId8 "p%" PRId8 " processor detected", - i, (uint8_t)((cpuid >> 20) & 0xf), (uint8_t)((cpuid >> 0) & 0xf)); - if (i == 7) { + 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)); + + cortex_m->maskints_erratum = false; + if (core_partno == CORTEX_M7_PARTNO) { uint8_t rev, patch; rev = (cpuid >> 20) & 0xf; patch = (cpuid >> 0) & 0xf; - if ((rev == 0) && (patch < 2)) - LOG_WARNING("Silicon bug: single stepping will enter pending exception handler!"); + if ((rev == 0) && (patch < 2)) { + LOG_WARNING("Silicon bug: single stepping may enter pending exception handler!"); + cortex_m->maskints_erratum = true; + } } 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) { + } 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; - if (!armv7m->stlink) { - if (i == 3 || i == 4) + /* 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->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; + if (!(cortex_m->dcb_dhcsr & C_DEBUGEN)) { + 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; + cortex_m->dcb_dhcsr = dhcsr; } /* Configure trace modules */ @@ -2115,10 +2154,8 @@ int cortex_m_examine(struct target *target) 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. */ @@ -2127,7 +2164,6 @@ int cortex_m_examine(struct target *target) /* bits [14:12] and [7:4] */ cortex_m->fp_num_code = ((fpcr >> 8) & 0x70) | ((fpcr >> 4) & 0xF); cortex_m->fp_num_lit = (fpcr >> 8) & 0xF; - cortex_m->fp_code_available = cortex_m->fp_num_code; /* Detect flash patch revision, see RM DDI 0403E.b page C1-817. Revision is zero base, fp_rev == 1 means Rev.2 ! */ cortex_m->fp_rev = (fpcr >> 28) & 0xf; @@ -2136,7 +2172,7 @@ int cortex_m_examine(struct target *target) 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; @@ -2154,7 +2190,7 @@ int cortex_m_examine(struct target *target) 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); @@ -2284,7 +2320,7 @@ static int cortex_m_target_create(struct target *target, Jim_Interp *interp) 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; } @@ -2299,11 +2335,11 @@ static int cortex_m_target_create(struct target *target, Jim_Interp *interp) /*--------------------------------------------------------------------------*/ -static int cortex_m_verify_pointer(struct command_context *cmd_ctx, +static int cortex_m_verify_pointer(struct command_invocation *cmd, struct cortex_m_common *cm) { if (cm->common_magic != CORTEX_M_COMMON_MAGIC) { - command_print(cmd_ctx, "target is not a Cortex-M"); + command_print(cmd, "target is not a Cortex-M"); return ERROR_TARGET_INVALID; } return ERROR_OK; @@ -2337,10 +2373,15 @@ COMMAND_HANDLER(handle_cortex_m_vector_catch_command) { "reset", VC_CORERESET, }, }; - retval = cortex_m_verify_pointer(CMD_CTX, cortex_m); + retval = cortex_m_verify_pointer(CMD, cortex_m); 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; @@ -2392,7 +2433,7 @@ write: } for (unsigned i = 0; i < ARRAY_SIZE(vec_ids); i++) { - command_print(CMD_CTX, "%9s: %s", vec_ids[i].name, + command_print(CMD, "%9s: %s", vec_ids[i].name, (demcr & vec_ids[i].mask) ? "catch" : "ignore"); } @@ -2405,39 +2446,35 @@ COMMAND_HANDLER(handle_cortex_m_mask_interrupts_command) 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_CTX, cortex_m); + retval = cortex_m_verify_pointer(CMD, cortex_m); 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, "target must be stopped for \"%s\" command", CMD_NAME); return ERROR_OK; } 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; - - - if (cortex_m->isrmasking_mode == CORTEX_M_ISRMASK_ON) - cortex_m_write_debug_halt_mask(target, C_HALT | C_MASKINTS, 0); - else - cortex_m_write_debug_halt_mask(target, C_HALT, C_MASKINTS); + cortex_m_set_maskints_for_halt(target); } - n = Jim_Nvp_value2name_simple(nvp_maskisr_modes, cortex_m->isrmasking_mode); - command_print(CMD_CTX, "cortex_m interrupt mask %s", n->name); + 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; } @@ -2449,7 +2486,7 @@ COMMAND_HANDLER(handle_cortex_m_reset_config_command) int retval; char *reset_config; - retval = cortex_m_verify_pointer(CMD_CTX, cortex_m); + retval = cortex_m_verify_pointer(CMD, cortex_m); if (retval != ERROR_OK) return retval; @@ -2482,7 +2519,7 @@ COMMAND_HANDLER(handle_cortex_m_reset_config_command) break; } - command_print(CMD_CTX, "cortex_m reset_config %s", reset_config); + command_print(CMD, "cortex_m reset_config %s", reset_config); return ERROR_OK; } @@ -2493,7 +2530,7 @@ static const struct command_registration cortex_m_exec_command_handlers[] = { .handler = handle_cortex_m_mask_interrupts_command, .mode = COMMAND_EXEC, .help = "mask cortex_m interrupts", - .usage = "['auto'|'on'|'off']", + .usage = "['auto'|'on'|'off'|'steponly']", }, { .name = "vector_catch", @@ -2518,6 +2555,11 @@ static const struct command_registration cortex_m_command_handlers[] = { { .chain = armv7m_trace_command_handlers, }, + /* START_DEPRECATED_TPIU */ + { + .chain = arm_tpiu_deprecated_command_handlers, + }, + /* END_DEPRECATED_TPIU */ { .name = "cortex_m", .mode = COMMAND_EXEC, @@ -2525,12 +2567,14 @@ static const struct command_registration cortex_m_command_handlers[] = { .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, @@ -2561,6 +2605,7 @@ struct target_type cortexm_target = { .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,