X-Git-Url: https://review.openocd.org/gitweb?a=blobdiff_plain;f=src%2Ftarget%2Fcortex_m3.c;h=7f6cbafa522b3f2ccd062a933bfe9211e2932c50;hb=e7e9bfde47768b22be8b15c30c027dc8fb67c778;hp=762e3184c901151aedc230f8011919c3f07def2e;hpb=0c3a4b4d818554ea00dc993d31cea9f3e0d1a87d;p=openocd.git diff --git a/src/target/cortex_m3.c b/src/target/cortex_m3.c index 762e3184c9..7f6cbafa52 100644 --- a/src/target/cortex_m3.c +++ b/src/target/cortex_m3.c @@ -38,7 +38,7 @@ #include "arm_disassembler.h" #include "register.h" #include "arm_opcodes.h" - +#include "arm_semihosting.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. @@ -59,7 +59,7 @@ static void cortex_m3_enable_watchpoints(struct target *target); static int cortex_m3_store_core_reg_u32(struct target *target, enum armv7m_regtype type, uint32_t num, uint32_t value); -static int cortexm3_dap_read_coreregister_u32(struct swjdp_common *swjdp, +static int cortexm3_dap_read_coreregister_u32(struct adiv5_dap *swjdp, uint32_t *value, int regnum) { int retval; @@ -70,17 +70,21 @@ static int cortexm3_dap_read_coreregister_u32(struct swjdp_common *swjdp, 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); + retval = dap_queue_ap_write(swjdp, AP_REG_BD0 | (DCB_DCRSR & 0xC), regnum); + if (retval != ERROR_OK) + return retval; /* mem_ap_read_u32(swjdp, DCB_DCRDR, value); */ dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRDR & 0xFFFFFFF0); - dap_ap_read_reg_u32(swjdp, AP_REG_BD0 | (DCB_DCRDR & 0xC), value); + retval = dap_queue_ap_read(swjdp, AP_REG_BD0 | (DCB_DCRDR & 0xC), value); + if (retval != ERROR_OK) + return retval; - retval = swjdp_transaction_endcheck(swjdp); + retval = dap_run(swjdp); + if (retval != ERROR_OK) + return retval; /* restore DCB_DCRDR - this needs to be in a seperate * transaction otherwise the emulated DCC channel breaks */ @@ -90,7 +94,7 @@ static int cortexm3_dap_read_coreregister_u32(struct swjdp_common *swjdp, return retval; } -static int cortexm3_dap_write_coreregister_u32(struct swjdp_common *swjdp, +static int cortexm3_dap_write_coreregister_u32(struct adiv5_dap *swjdp, uint32_t value, int regnum) { int retval; @@ -101,17 +105,17 @@ static int cortexm3_dap_write_coreregister_u32(struct swjdp_common *swjdp, 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); + retval = dap_queue_ap_write(swjdp, AP_REG_BD0 | (DCB_DCRDR & 0xC), value); + // XXX check retval /* mem_ap_write_u32(swjdp, DCB_DCRSR, i | DCRSR_WnR); */ dap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRSR & 0xFFFFFFF0); - dap_ap_write_reg_u32(swjdp, AP_REG_BD0 | (DCB_DCRSR & 0xC), regnum | DCRSR_WnR); + retval = dap_queue_ap_write(swjdp, AP_REG_BD0 | (DCB_DCRSR & 0xC), regnum | DCRSR_WnR); + // XXX check retval - retval = swjdp_transaction_endcheck(swjdp); + retval = dap_run(swjdp); /* restore DCB_DCRDR - this needs to be in a seperate * transaction otherwise the emulated DCC channel breaks */ @@ -125,7 +129,7 @@ static int cortex_m3_write_debug_halt_mask(struct target *target, uint32_t mask_on, uint32_t mask_off) { struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info; + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; /* mask off status bits */ cortex_m3->dcb_dhcsr &= ~((0xFFFF << 16) | mask_off); @@ -138,7 +142,7 @@ static int cortex_m3_write_debug_halt_mask(struct target *target, static int cortex_m3_clear_halt(struct target *target) { struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info; + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; /* clear step if any */ cortex_m3_write_debug_halt_mask(target, C_HALT, C_STEP); @@ -156,7 +160,7 @@ static int cortex_m3_clear_halt(struct target *target) static int cortex_m3_single_step_core(struct target *target) { struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info; + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; uint32_t dhcsr_save; /* backup dhcsr reg */ @@ -183,10 +187,11 @@ static int cortex_m3_single_step_core(struct target *target) static int cortex_m3_endreset_event(struct target *target) { int i; + int retval; uint32_t dcb_demcr; 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 adiv5_dap *swjdp = &cortex_m3->armv7m.dap; struct cortex_m3_fp_comparator *fp_list = cortex_m3->fp_comparator_list; struct cortex_m3_dwt_comparator *dwt_list = cortex_m3->dwt_comparator_list; @@ -238,14 +243,16 @@ static int cortex_m3_endreset_event(struct target *target) target_write_u32(target, dwt_list[i].dwt_comparator_address + 8, dwt_list[i].function); } - swjdp_transaction_endcheck(swjdp); + retval = dap_run(swjdp); + if (retval != ERROR_OK) + return retval; 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; + return retval; } static int cortex_m3_examine_debug_reason(struct target *target) @@ -279,7 +286,8 @@ static int cortex_m3_examine_exception_reason(struct target *target) { uint32_t shcsr, except_sr, cfsr = -1, except_ar = -1; struct armv7m_common *armv7m = target_to_armv7m(target); - struct swjdp_common *swjdp = &armv7m->swjdp_info; + struct adiv5_dap *swjdp = &armv7m->dap; + int retval; mem_ap_read_u32(swjdp, NVIC_SHCSR, &shcsr); switch (armv7m->exception_number) @@ -317,12 +325,33 @@ static int cortex_m3_examine_exception_reason(struct target *target) except_sr = 0; break; } - swjdp_transaction_endcheck(swjdp); - LOG_DEBUG("%s SHCSR 0x%" PRIx32 ", SR 0x%" PRIx32 ", CFSR 0x%" PRIx32 ", AR 0x%" PRIx32 "", armv7m_exception_string(armv7m->exception_number), \ - shcsr, except_sr, cfsr, except_ar); - return ERROR_OK; + retval = dap_run(swjdp); + if (retval == ERROR_OK) + LOG_DEBUG("%s SHCSR 0x%" PRIx32 ", SR 0x%" PRIx32 + ", CFSR 0x%" PRIx32 ", AR 0x%" PRIx32, + armv7m_exception_string(armv7m->exception_number), + shcsr, except_sr, cfsr, except_ar); + return retval; } +/* 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; @@ -330,7 +359,8 @@ static int cortex_m3_debug_entry(struct target *target) int retval; 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 arm *arm = &armv7m->arm; + struct adiv5_dap *swjdp = &armv7m->dap; struct reg *r; LOG_DEBUG(" "); @@ -377,11 +407,27 @@ static int cortex_m3_debug_entry(struct target *target) { 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; } @@ -392,7 +438,7 @@ static int cortex_m3_debug_entry(struct target *target) 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) @@ -406,7 +452,7 @@ static int cortex_m3_poll(struct target *target) int retval; enum target_state prev_target_state = target->state; struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info; + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; /* Read from Debug Halting Control and Status Register */ retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr); @@ -416,6 +462,21 @@ static int cortex_m3_poll(struct target *target) 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 */ @@ -449,6 +510,9 @@ static int cortex_m3_poll(struct target *target) if ((retval = cortex_m3_debug_entry(target)) != ERROR_OK) return retval; + if (arm_semihosting(target, &retval) != 0) + return retval; + target_call_event_callbacks(target, TARGET_EVENT_HALTED); } if (prev_target_state == TARGET_DEBUG_RUNNING) @@ -523,7 +587,7 @@ static int cortex_m3_halt(struct target *target) static int cortex_m3_soft_reset_halt(struct target *target) { struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info; + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; uint32_t dcb_dhcsr = 0; int retval, timeout = 0; @@ -630,7 +694,7 @@ static int cortex_m3_resume(struct target *target, int current, } /* current = 1: continue on current pc, otherwise continue at
*/ - r = armv7m->core_cache->reg_list + 15; + r = armv7m->arm.pc; if (!current) { buf_set_u32(r->value, 0, 32, address); @@ -697,9 +761,9 @@ static int cortex_m3_step(struct target *target, int current, { 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 adiv5_dap *swjdp = &armv7m->dap; struct breakpoint *breakpoint = NULL; - struct reg *pc = armv7m->core_cache->reg_list + 15; + struct reg *pc = armv7m->arm.pc; bool bkpt_inst_found = false; if (target->state != TARGET_HALTED) @@ -762,7 +826,7 @@ static int cortex_m3_step(struct target *target, int current, static int cortex_m3_assert_reset(struct target *target) { struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info; + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; int assert_srst = 1; LOG_DEBUG("target->state: %s", @@ -1312,7 +1376,7 @@ static int cortex_m3_load_core_reg_u32(struct target *target, { int retval; struct armv7m_common *armv7m = target_to_armv7m(target); - struct swjdp_common *swjdp = &armv7m->swjdp_info; + struct adiv5_dap *swjdp = &armv7m->dap; /* NOTE: we "know" here that the register identifiers used * in the v7m header match the Cortex-M3 Debug Core Register @@ -1376,7 +1440,7 @@ static int cortex_m3_store_core_reg_u32(struct target *target, int retval; uint32_t reg; struct armv7m_common *armv7m = target_to_armv7m(target); - struct swjdp_common *swjdp = &armv7m->swjdp_info; + struct adiv5_dap *swjdp = &armv7m->dap; #ifdef ARMV7_GDB_HACKS /* If the LR register is being modified, make sure it will put us @@ -1454,7 +1518,7 @@ static int cortex_m3_read_memory(struct target *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer) { struct armv7m_common *armv7m = target_to_armv7m(target); - struct swjdp_common *swjdp = &armv7m->swjdp_info; + struct adiv5_dap *swjdp = &armv7m->dap; int retval = ERROR_INVALID_ARGUMENTS; /* cortex_m3 handles unaligned memory access */ @@ -1479,7 +1543,7 @@ static int cortex_m3_write_memory(struct target *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer) { struct armv7m_common *armv7m = target_to_armv7m(target); - struct swjdp_common *swjdp = &armv7m->swjdp_info; + struct adiv5_dap *swjdp = &armv7m->dap; int retval = ERROR_INVALID_ARGUMENTS; if (count && buffer) { @@ -1660,7 +1724,7 @@ static int cortex_m3_examine(struct target *target) uint32_t cpuid, fpcr; int i; struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info; + struct adiv5_dap *swjdp = &cortex_m3->armv7m.dap; if ((retval = ahbap_debugport_init(swjdp)) != ERROR_OK) return retval; @@ -1675,8 +1739,8 @@ static int cortex_m3_examine(struct target *target) return retval; if (((cpuid >> 4) & 0xc3f) == 0xc23) - LOG_DEBUG("Cortex-M3 r%dp%d processor detected", - (cpuid >> 20) & 0xf, (cpuid >> 0) & 0xf); + 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. */ @@ -1709,7 +1773,7 @@ static int cortex_m3_examine(struct target *target) return ERROR_OK; } -static int cortex_m3_dcc_read(struct swjdp_common *swjdp, uint8_t *value, uint8_t *ctrl) +static int cortex_m3_dcc_read(struct adiv5_dap *swjdp, uint8_t *value, uint8_t *ctrl) { uint16_t dcrdr; @@ -1734,7 +1798,7 @@ static int cortex_m3_target_request_data(struct target *target, uint32_t size, uint8_t *buffer) { struct armv7m_common *armv7m = target_to_armv7m(target); - struct swjdp_common *swjdp = &armv7m->swjdp_info; + struct adiv5_dap *swjdp = &armv7m->dap; uint8_t data; uint8_t ctrl; uint32_t i; @@ -1754,7 +1818,7 @@ static int cortex_m3_handle_target_request(void *priv) if (!target_was_examined(target)) return ERROR_OK; struct armv7m_common *armv7m = target_to_armv7m(target); - struct swjdp_common *swjdp = &armv7m->swjdp_info; + struct adiv5_dap *swjdp = &armv7m->dap; if (!target->dbg_msg_enabled) return ERROR_OK; @@ -1798,12 +1862,13 @@ static int cortex_m3_init_arch_info(struct target *target, cortex_m3->jtag_info.tap = tap; cortex_m3->jtag_info.scann_size = 4; - armv7m->swjdp_info.dp_select_value = -1; - armv7m->swjdp_info.ap_csw_value = -1; - armv7m->swjdp_info.ap_tar_value = -1; - armv7m->swjdp_info.jtag_info = &cortex_m3->jtag_info; - armv7m->swjdp_info.memaccess_tck = 8; - armv7m->swjdp_info.tar_autoincr_block = (1 << 12); /* Cortex-M3 has 4096 bytes autoincrement range */ + armv7m->arm.dap = &armv7m->dap; + + /* Leave (only) generic DAP stuff for debugport_init(); */ + armv7m->dap.jtag_info = &cortex_m3->jtag_info; + armv7m->dap.memaccess_tck = 8; + /* Cortex-M3 has 4096 bytes autoincrement range */ + armv7m->dap.tar_autoincr_block = (1 << 12); /* register arch-specific functions */ armv7m->examine_debug_reason = cortex_m3_examine_debug_reason; @@ -1811,7 +1876,6 @@ static int cortex_m3_init_arch_info(struct target *target, armv7m->post_debug_entry = NULL; armv7m->pre_restore_context = NULL; - armv7m->post_restore_context = NULL; armv7m->load_core_reg_u32 = cortex_m3_load_core_reg_u32; armv7m->store_core_reg_u32 = cortex_m3_store_core_reg_u32; @@ -1854,50 +1918,6 @@ static int cortex_m3_verify_pointer(struct command_context *cmd_ctx, * 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; - struct target *target = get_current_target(CMD_CTX); - struct cortex_m3_common *cortex_m3 = target_to_cm3(target); - uint32_t address; - unsigned long count = 1; - struct arm_instruction cur_instruction; - - retval = cortex_m3_verify_pointer(CMD_CTX, cortex_m3); - if (retval != ERROR_OK) - return retval; - - errno = 0; - switch (CMD_ARGC) { - case 2: - COMMAND_PARSE_NUMBER(ulong, CMD_ARGV[1], count); - /* FALL THROUGH */ - case 1: - COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address); - break; - default: - command_print(CMD_CTX, - "usage: cortex_m3 disassemble
[]"); - 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; @@ -1917,7 +1937,7 @@ COMMAND_HANDLER(handle_cortex_m3_vector_catch_command) 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; + struct adiv5_dap *swjdp = &armv7m->dap; uint32_t demcr = 0; int retval; @@ -2011,13 +2031,6 @@ COMMAND_HANDLER(handle_cortex_m3_mask_interrupts_command) } static const struct command_registration cortex_m3_exec_command_handlers[] = { - { - .name = "disassemble", - .handler = handle_cortex_m3_disassemble_command, - .mode = COMMAND_EXEC, - .help = "disassemble Thumb2 instructions", - .usage = "address [count]", - }, { .name = "maskisr", .handler = handle_cortex_m3_mask_interrupts_command,