X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Fcortex_m.c;h=4566e2e7cae22933db568ffec84e4afe4f9faf75;hp=dc8d344401abe7d83f0db75d7b379b4f45489f61;hb=640894e7316b4e45ee4533c611a3d4c4bee6177a;hpb=c46dd490d1a26fee57ff1f32781175ad64b72e86 diff --git a/src/target/cortex_m.c b/src/target/cortex_m.c index dc8d344401..4566e2e7ca 100644 --- a/src/target/cortex_m.c +++ b/src/target/cortex_m.c @@ -19,9 +19,7 @@ * GNU General Public License for more details. * * * * You should have received a copy of the GNU General Public License * - * along with this program; if not, write to the * - * Free Software Foundation, Inc., * - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * + * along with this program. If not, see . * * * * * * Cortex-M3(tm) TRM, ARM DDI 0337E (r1p1) and 0337G (r2p0) * @@ -61,28 +59,28 @@ /* 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) { struct armv7m_common *armv7m = target_to_armv7m(target); - struct adiv5_dap *swjdp = armv7m->arm.dap; int retval; uint32_t dcrdr; /* because the DCB_DCRDR is used for the emulated dcc channel * we have to save/restore the DCB_DCRDR when used */ if (target->dbg_msg_enabled) { - retval = mem_ap_read_u32(swjdp, DCB_DCRDR, &dcrdr); + retval = mem_ap_read_u32(armv7m->debug_ap, DCB_DCRDR, &dcrdr); if (retval != ERROR_OK) return retval; } - retval = mem_ap_write_u32(swjdp, DCB_DCRSR, regnum); + retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DCRSR, regnum); if (retval != ERROR_OK) return retval; - retval = mem_ap_read_atomic_u32(swjdp, DCB_DCRDR, value); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DCRDR, value); if (retval != ERROR_OK) return retval; @@ -90,7 +88,7 @@ static int cortexm_dap_read_coreregister_u32(struct target *target, /* 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(swjdp, DCB_DCRDR, dcrdr); + retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DCRDR, dcrdr); } return retval; @@ -100,23 +98,22 @@ static int cortexm_dap_write_coreregister_u32(struct target *target, uint32_t value, int regnum) { struct armv7m_common *armv7m = target_to_armv7m(target); - struct adiv5_dap *swjdp = armv7m->arm.dap; int retval; uint32_t dcrdr; /* because the DCB_DCRDR is used for the emulated dcc channel * we have to save/restore the DCB_DCRDR when used */ if (target->dbg_msg_enabled) { - retval = mem_ap_read_u32(swjdp, DCB_DCRDR, &dcrdr); + retval = mem_ap_read_u32(armv7m->debug_ap, DCB_DCRDR, &dcrdr); if (retval != ERROR_OK) return retval; } - retval = mem_ap_write_u32(swjdp, DCB_DCRDR, value); + retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DCRDR, value); if (retval != ERROR_OK) return retval; - retval = mem_ap_write_atomic_u32(swjdp, DCB_DCRSR, regnum | DCRSR_WnR); + retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DCRSR, regnum | DCRSR_WnR); if (retval != ERROR_OK) return retval; @@ -124,7 +121,7 @@ static int cortexm_dap_write_coreregister_u32(struct target *target, /* restore DCB_DCRDR - this needs to be in a seperate * transaction otherwise the emulated DCC channel breaks */ if (retval == ERROR_OK) - retval = mem_ap_write_atomic_u32(swjdp, DCB_DCRDR, dcrdr); + retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DCRDR, dcrdr); } return retval; @@ -134,32 +131,32 @@ static int cortex_m_write_debug_halt_mask(struct target *target, uint32_t mask_on, uint32_t mask_off) { struct cortex_m_common *cortex_m = target_to_cm(target); - struct adiv5_dap *swjdp = cortex_m->armv7m.arm.dap; + struct armv7m_common *armv7m = &cortex_m->armv7m; /* mask off status bits */ cortex_m->dcb_dhcsr &= ~((0xFFFF << 16) | mask_off); /* create new register mask */ cortex_m->dcb_dhcsr |= DBGKEY | C_DEBUGEN | mask_on; - return mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, cortex_m->dcb_dhcsr); + return mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DHCSR, cortex_m->dcb_dhcsr); } static int cortex_m_clear_halt(struct target *target) { struct cortex_m_common *cortex_m = target_to_cm(target); - struct adiv5_dap *swjdp = cortex_m->armv7m.arm.dap; + struct armv7m_common *armv7m = &cortex_m->armv7m; int retval; /* clear step if any */ cortex_m_write_debug_halt_mask(target, C_HALT, C_STEP); /* Read Debug Fault Status Register */ - retval = mem_ap_read_atomic_u32(swjdp, NVIC_DFSR, &cortex_m->nvic_dfsr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, NVIC_DFSR, &cortex_m->nvic_dfsr); if (retval != ERROR_OK) return retval; /* Clear Debug Fault Status */ - retval = mem_ap_write_atomic_u32(swjdp, NVIC_DFSR, cortex_m->nvic_dfsr); + retval = mem_ap_write_atomic_u32(armv7m->debug_ap, NVIC_DFSR, cortex_m->nvic_dfsr); if (retval != ERROR_OK) return retval; LOG_DEBUG(" NVIC_DFSR 0x%" PRIx32 "", cortex_m->nvic_dfsr); @@ -170,7 +167,7 @@ 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 adiv5_dap *swjdp = cortex_m->armv7m.arm.dap; + struct armv7m_common *armv7m = &cortex_m->armv7m; uint32_t dhcsr_save; int retval; @@ -182,12 +179,12 @@ 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(swjdp, DCB_DHCSR, + retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DHCSR, DBGKEY | C_MASKINTS | C_HALT | C_DEBUGEN); if (retval != ERROR_OK) return retval; } - retval = mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, + retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DHCSR, DBGKEY | C_MASKINTS | C_STEP | C_DEBUGEN); if (retval != ERROR_OK) return retval; @@ -230,22 +227,22 @@ static int cortex_m_endreset_event(struct target *target) struct cortex_m_dwt_comparator *dwt_list = cortex_m->dwt_comparator_list; /* REVISIT The four debug monitor bits are currently ignored... */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &dcb_demcr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DEMCR, &dcb_demcr); if (retval != ERROR_OK) return retval; LOG_DEBUG("DCB_DEMCR = 0x%8.8" PRIx32 "", dcb_demcr); /* this register is used for emulated dcc channel */ - retval = mem_ap_write_u32(swjdp, DCB_DCRDR, 0); + retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DCRDR, 0); if (retval != ERROR_OK) return retval; /* Enable debug requests */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m->dcb_dhcsr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr); if (retval != ERROR_OK) return retval; if (!(cortex_m->dcb_dhcsr & C_DEBUGEN)) { - retval = mem_ap_write_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN); + retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DHCSR, DBGKEY | C_DEBUGEN); if (retval != ERROR_OK) return retval; } @@ -260,7 +257,7 @@ static int cortex_m_endreset_event(struct target *target) * choices *EXCEPT* explicitly scripted overrides like "vector_catch" * or manual updates to the NVIC SHCSR and CCR registers. */ - retval = mem_ap_write_u32(swjdp, DCB_DEMCR, TRCENA | armv7m->demcr); + retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DEMCR, TRCENA | armv7m->demcr); if (retval != ERROR_OK) return retval; @@ -306,7 +303,7 @@ static int cortex_m_endreset_event(struct target *target) register_cache_invalidate(armv7m->arm.core_cache); /* make sure we have latest dhcsr flags */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m->dcb_dhcsr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr); return retval; } @@ -342,47 +339,47 @@ static int cortex_m_examine_exception_reason(struct target *target) struct adiv5_dap *swjdp = armv7m->arm.dap; int retval; - retval = mem_ap_read_u32(swjdp, NVIC_SHCSR, &shcsr); + retval = mem_ap_read_u32(armv7m->debug_ap, NVIC_SHCSR, &shcsr); if (retval != ERROR_OK) return retval; switch (armv7m->exception_number) { case 2: /* NMI */ break; case 3: /* Hard Fault */ - retval = mem_ap_read_atomic_u32(swjdp, NVIC_HFSR, &except_sr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, NVIC_HFSR, &except_sr); if (retval != ERROR_OK) return retval; if (except_sr & 0x40000000) { - retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &cfsr); + retval = mem_ap_read_u32(armv7m->debug_ap, NVIC_CFSR, &cfsr); if (retval != ERROR_OK) return retval; } break; case 4: /* Memory Management */ - retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr); + retval = mem_ap_read_u32(armv7m->debug_ap, NVIC_CFSR, &except_sr); if (retval != ERROR_OK) return retval; - retval = mem_ap_read_u32(swjdp, NVIC_MMFAR, &except_ar); + retval = mem_ap_read_u32(armv7m->debug_ap, NVIC_MMFAR, &except_ar); if (retval != ERROR_OK) return retval; break; case 5: /* Bus Fault */ - retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr); + retval = mem_ap_read_u32(armv7m->debug_ap, NVIC_CFSR, &except_sr); if (retval != ERROR_OK) return retval; - retval = mem_ap_read_u32(swjdp, NVIC_BFAR, &except_ar); + retval = mem_ap_read_u32(armv7m->debug_ap, NVIC_BFAR, &except_ar); if (retval != ERROR_OK) return retval; break; case 6: /* Usage Fault */ - retval = mem_ap_read_u32(swjdp, NVIC_CFSR, &except_sr); + retval = mem_ap_read_u32(armv7m->debug_ap, NVIC_CFSR, &except_sr); if (retval != ERROR_OK) return retval; break; case 11: /* SVCall */ break; case 12: /* Debug Monitor */ - retval = mem_ap_read_u32(swjdp, NVIC_DFSR, &except_sr); + retval = mem_ap_read_u32(armv7m->debug_ap, NVIC_DFSR, &except_sr); if (retval != ERROR_OK) return retval; break; @@ -411,13 +408,12 @@ static int cortex_m_debug_entry(struct target *target) struct cortex_m_common *cortex_m = target_to_cm(target); struct armv7m_common *armv7m = &cortex_m->armv7m; struct arm *arm = &armv7m->arm; - struct adiv5_dap *swjdp = armv7m->arm.dap; struct reg *r; LOG_DEBUG(" "); cortex_m_clear_halt(target); - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m->dcb_dhcsr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr); if (retval != ERROR_OK) return retval; @@ -473,7 +469,7 @@ static int cortex_m_debug_entry(struct target *target) LOG_DEBUG("entered debug state in core mode: %s at PC 0x%" PRIx32 ", target->state: %s", arm_mode_name(arm->core_mode), - *(uint32_t *)(arm->pc->value), + buf_get_u32(arm->pc->value, 0, 32), target_state_name(target)); if (armv7m->post_debug_entry) { @@ -491,10 +487,10 @@ static int cortex_m_poll(struct target *target) int retval = ERROR_OK; enum target_state prev_target_state = target->state; struct cortex_m_common *cortex_m = target_to_cm(target); - struct adiv5_dap *swjdp = cortex_m->armv7m.arm.dap; + struct armv7m_common *armv7m = &cortex_m->armv7m; /* Read from Debug Halting Control and Status Register */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m->dcb_dhcsr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr); if (retval != ERROR_OK) { target->state = TARGET_UNKNOWN; return retval; @@ -515,21 +511,14 @@ static int cortex_m_poll(struct target *target) detected_failure = ERROR_FAIL; /* refresh status bits */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m->dcb_dhcsr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr); if (retval != ERROR_OK) return retval; } if (cortex_m->dcb_dhcsr & S_RESET_ST) { - /* check if still in reset */ - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m->dcb_dhcsr); - if (retval != ERROR_OK) - return retval; - - if (cortex_m->dcb_dhcsr & S_RESET_ST) { - target->state = TARGET_RESET; - return ERROR_OK; - } + target->state = TARGET_RESET; + return ERROR_OK; } if (target->state == TARGET_RESET) { @@ -538,7 +527,11 @@ static int cortex_m_poll(struct target *target) */ LOG_DEBUG("Exit from reset with dcb_dhcsr 0x%" PRIx32, cortex_m->dcb_dhcsr); - cortex_m_endreset_event(target); + retval = cortex_m_endreset_event(target); + if (retval != ERROR_OK) { + target->state = TARGET_UNKNOWN; + return retval; + } target->state = TARGET_RUNNING; prev_target_state = TARGET_RUNNING; } @@ -622,7 +615,7 @@ static int cortex_m_halt(struct target *target) static int cortex_m_soft_reset_halt(struct target *target) { struct cortex_m_common *cortex_m = target_to_cm(target); - struct adiv5_dap *swjdp = cortex_m->armv7m.arm.dap; + struct armv7m_common *armv7m = &cortex_m->armv7m; uint32_t dcb_dhcsr = 0; int retval, timeout = 0; @@ -633,13 +626,13 @@ static int cortex_m_soft_reset_halt(struct target *target) LOG_WARNING("soft_reset_halt is deprecated, please use 'reset halt' instead."); /* Enter debug state on reset; restore DEMCR in endreset_event() */ - retval = mem_ap_write_u32(swjdp, DCB_DEMCR, + retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET); if (retval != ERROR_OK) return retval; /* Request a core-only reset */ - retval = mem_ap_write_atomic_u32(swjdp, NVIC_AIRCR, + retval = mem_ap_write_atomic_u32(armv7m->debug_ap, NVIC_AIRCR, AIRCR_VECTKEY | AIRCR_VECTRESET); if (retval != ERROR_OK) return retval; @@ -649,9 +642,9 @@ 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(swjdp, DCB_DHCSR, &dcb_dhcsr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &dcb_dhcsr); if (retval == ERROR_OK) { - retval = mem_ap_read_atomic_u32(swjdp, NVIC_DFSR, + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, NVIC_DFSR, &cortex_m->nvic_dfsr); if (retval != ERROR_OK) return retval; @@ -793,7 +786,6 @@ static int cortex_m_step(struct target *target, int current, { struct cortex_m_common *cortex_m = target_to_cm(target); struct armv7m_common *armv7m = &cortex_m->armv7m; - struct adiv5_dap *swjdp = armv7m->arm.dap; struct breakpoint *breakpoint = NULL; struct reg *pc = armv7m->arm.pc; bool bkpt_inst_found = false; @@ -895,7 +887,7 @@ static int cortex_m_step(struct target *target, int current, /* Wait for pending handlers to complete or timeout */ do { - retval = mem_ap_read_atomic_u32(swjdp, + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr); if (retval != ERROR_OK) { @@ -930,7 +922,7 @@ static int cortex_m_step(struct target *target, int current, } } - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m->dcb_dhcsr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr); if (retval != ERROR_OK) return retval; @@ -966,7 +958,7 @@ static int cortex_m_step(struct target *target, int current, static int cortex_m_assert_reset(struct target *target) { struct cortex_m_common *cortex_m = target_to_cm(target); - struct adiv5_dap *swjdp = cortex_m->armv7m.arm.dap; + struct armv7m_common *armv7m = &cortex_m->armv7m; enum cortex_m_soft_reset_config reset_config = cortex_m->soft_reset_config; LOG_DEBUG("target->state: %s", @@ -997,35 +989,25 @@ static int cortex_m_assert_reset(struct target *target) /* Enable debug requests */ int retval; - retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m->dcb_dhcsr); - if (retval != ERROR_OK) - return retval; - if (!(cortex_m->dcb_dhcsr & C_DEBUGEN)) { - retval = mem_ap_write_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN); - if (retval != ERROR_OK) - return retval; - } + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DHCSR, &cortex_m->dcb_dhcsr); + /* Store important errors instead of failing and proceed to reset assert */ + + if (retval != ERROR_OK || !(cortex_m->dcb_dhcsr & C_DEBUGEN)) + retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DHCSR, DBGKEY | C_DEBUGEN); /* If the processor is sleeping in a WFI or WFE instruction, the * C_HALT bit must be asserted to regain control */ - if (cortex_m->dcb_dhcsr & S_SLEEP) { - retval = mem_ap_write_u32(swjdp, DCB_DHCSR, DBGKEY | C_HALT | C_DEBUGEN); - if (retval != ERROR_OK) - return retval; - } + if (retval == ERROR_OK && (cortex_m->dcb_dhcsr & S_SLEEP)) + retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DHCSR, DBGKEY | C_HALT | C_DEBUGEN); - retval = mem_ap_write_u32(swjdp, DCB_DCRDR, 0); - if (retval != ERROR_OK) - return retval; + mem_ap_write_u32(armv7m->debug_ap, DCB_DCRDR, 0); + /* Ignore less important errors */ if (!target->reset_halt) { /* Set/Clear C_MASKINTS in a separate operation */ - if (cortex_m->dcb_dhcsr & C_MASKINTS) { - retval = mem_ap_write_atomic_u32(swjdp, DCB_DHCSR, + if (cortex_m->dcb_dhcsr & C_MASKINTS) + mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DHCSR, DBGKEY | C_DEBUGEN | C_HALT); - if (retval != ERROR_OK) - return retval; - } /* clear any debug flags before resuming */ cortex_m_clear_halt(target); @@ -1039,28 +1021,26 @@ static int cortex_m_assert_reset(struct target *target) * bad vector table entries. Should this include MMERR or * other flags too? */ - retval = mem_ap_write_atomic_u32(swjdp, DCB_DEMCR, + int retval2; + retval2 = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET); - if (retval != ERROR_OK) - return retval; + if (retval != ERROR_OK || retval2 != ERROR_OK) + LOG_INFO("AP write error, reset will not halt"); } if (jtag_reset_config & RESET_HAS_SRST) { /* default to asserting srst */ if (!srst_asserted) adapter_assert_reset(); + + /* srst is asserted, ignore AP access errors */ + 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. * This has the disadvantage of not resetting the peripherals, so a * reset-init event handler is needed to perform any peripheral resets. */ - retval = mem_ap_write_atomic_u32(swjdp, NVIC_AIRCR, - AIRCR_VECTKEY | ((reset_config == CORTEX_M_RESET_SYSRESETREQ) - ? AIRCR_SYSRESETREQ : AIRCR_VECTRESET)); - if (retval != ERROR_OK) - return retval; - LOG_DEBUG("Using Cortex-M %s", (reset_config == CORTEX_M_RESET_SYSRESETREQ) ? "SYSRESETREQ" : "VECTRESET"); @@ -1069,15 +1049,24 @@ static int cortex_m_assert_reset(struct target *target) "handler to reset any peripherals or configure hardware srst support."); } - { + int retval3; + retval3 = mem_ap_write_atomic_u32(armv7m->debug_ap, NVIC_AIRCR, + AIRCR_VECTKEY | ((reset_config == CORTEX_M_RESET_SYSRESETREQ) + ? AIRCR_SYSRESETREQ : AIRCR_VECTRESET)); + 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) + LOG_ERROR("DP initialisation failed"); + + else { /* I do not know why this is necessary, but it * fixes strange effects (step/resume cause NMI * after reset) on LM3S6918 -- Michael Schwingen */ uint32_t tmp; - retval = mem_ap_read_atomic_u32(swjdp, NVIC_AIRCR, &tmp); - if (retval != ERROR_OK) - return retval; + mem_ap_read_atomic_u32(armv7m->debug_ap, NVIC_AIRCR, &tmp); } } @@ -1086,6 +1075,10 @@ static int cortex_m_assert_reset(struct target *target) register_cache_invalidate(cortex_m->armv7m.arm.core_cache); + /* now return stored error code if any */ + if (retval != ERROR_OK) + return retval; + if (target->reset_halt) { retval = target_halt(target); if (retval != ERROR_OK) @@ -1097,12 +1090,25 @@ static int cortex_m_assert_reset(struct target *target) static int cortex_m_deassert_reset(struct target *target) { + struct armv7m_common *armv7m = &target_to_cm(target)->armv7m; + LOG_DEBUG("target->state: %s", target_state_name(target)); /* deassert reset lines */ adapter_deassert_reset(); + enum reset_types jtag_reset_config = jtag_get_reset_config(); + + if ((jtag_reset_config & RESET_HAS_SRST) && + !(jtag_reset_config & RESET_SRST_NO_GATING)) { + int retval = dap_dp_init(armv7m->debug_ap->dap); + if (retval != ERROR_OK) { + LOG_ERROR("DP initialisation failed"); + return retval; + } + } + return ERROR_OK; } @@ -1110,7 +1116,6 @@ int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint { int retval; int fp_num = 0; - uint32_t hilo; struct cortex_m_common *cortex_m = target_to_cm(target); struct cortex_m_fp_comparator *comparator_list = cortex_m->fp_comparator_list; @@ -1123,6 +1128,7 @@ int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint breakpoint->type = BKPT_TYPE_BY_ADDR(breakpoint->address); if (breakpoint->type == BKPT_HARD) { + uint32_t fpcr_value; while (comparator_list[fp_num].used && (fp_num < cortex_m->fp_num_code)) fp_num++; if (fp_num >= cortex_m->fp_num_code) { @@ -1130,9 +1136,17 @@ int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint return ERROR_FAIL; } breakpoint->set = fp_num + 1; - hilo = (breakpoint->address & 0x2) ? FPCR_REPLACE_BKPT_HIGH : FPCR_REPLACE_BKPT_LOW; + fpcr_value = breakpoint->address | 1; + if (cortex_m->fp_rev == 0) { + uint32_t hilo; + hilo = (breakpoint->address & 0x2) ? FPCR_REPLACE_BKPT_HIGH : FPCR_REPLACE_BKPT_LOW; + fpcr_value = (fpcr_value & 0x1FFFFFFC) | hilo | 1; + } else if (cortex_m->fp_rev > 1) { + LOG_ERROR("Unhandled Cortex-M Flash Patch Breakpoint architecture revision"); + return ERROR_FAIL; + } comparator_list[fp_num].used = 1; - comparator_list[fp_num].fpcr_value = (breakpoint->address & 0x1FFFFFFC) | hilo | 1; + comparator_list[fp_num].fpcr_value = fpcr_value; target_write_u32(target, comparator_list[fp_num].fpcr_address, comparator_list[fp_num].fpcr_value); LOG_DEBUG("fpc_num %i fpcr_value 0x%" PRIx32 "", @@ -1252,6 +1266,11 @@ int cortex_m_add_breakpoint(struct target *target, struct breakpoint *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; + } + if ((breakpoint->length != 2)) { LOG_INFO("only breakpoints of two bytes length supported"); return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; @@ -1483,6 +1502,29 @@ static int cortex_m_load_core_reg_u32(struct target *target, 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: @@ -1546,6 +1588,29 @@ static int cortex_m_store_core_reg_u32(struct target *target, 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: @@ -1590,7 +1655,6 @@ static int cortex_m_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 adiv5_dap *swjdp = armv7m->arm.dap; if (armv7m->arm.is_armv6m) { /* armv6m does not handle unaligned memory access */ @@ -1598,14 +1662,13 @@ static int cortex_m_read_memory(struct target *target, uint32_t address, return ERROR_TARGET_UNALIGNED_ACCESS; } - return mem_ap_read(swjdp, buffer, size, count, address, true); + return mem_ap_read_buf(armv7m->debug_ap, buffer, size, count, address); } static int cortex_m_write_memory(struct target *target, uint32_t address, uint32_t size, uint32_t count, const uint8_t *buffer) { struct armv7m_common *armv7m = target_to_armv7m(target); - struct adiv5_dap *swjdp = armv7m->arm.dap; if (armv7m->arm.is_armv6m) { /* armv6m does not handle unaligned memory access */ @@ -1613,7 +1676,7 @@ static int cortex_m_write_memory(struct target *target, uint32_t address, return ERROR_TARGET_UNALIGNED_ACCESS; } - return mem_ap_write(swjdp, buffer, size, count, address, true); + return mem_ap_write_buf(armv7m->debug_ap, buffer, size, count, address); } static int cortex_m_init_target(struct command_context *cmd_ctx, @@ -1623,6 +1686,18 @@ static int cortex_m_init_target(struct command_context *cmd_ctx, return ERROR_OK; } +void cortex_m_deinit_target(struct target *target) +{ + struct cortex_m_common *cortex_m = target_to_cm(target); + + free(cortex_m->fp_comparator_list); + + cortex_m_dwt_free(target); + armv7m_free_reg_cache(target); + + free(cortex_m); +} + /* REVISIT cache valid/dirty bits are unmaintained. We could set "valid" * on r/w if the core is not running, and clear on resume or reset ... or * at least, in a post_restore_context() method. @@ -1631,14 +1706,20 @@ static int cortex_m_init_target(struct command_context *cmd_ctx, struct dwt_reg_state { struct target *target; uint32_t addr; - uint32_t value; /* scratch/cache */ + uint8_t value[4]; /* scratch/cache */ }; static int cortex_m_dwt_get_reg(struct reg *reg) { struct dwt_reg_state *state = reg->arch_info; - return target_read_u32(state->target, state->addr, &state->value); + uint32_t tmp; + int retval = target_read_u32(state->target, state->addr, &tmp); + if (retval != ERROR_OK) + return retval; + + buf_set_u32(state->value, 0, 32, tmp); + return ERROR_OK; } static int cortex_m_dwt_set_reg(struct reg *reg, uint8_t *buf) @@ -1693,7 +1774,7 @@ static void cortex_m_dwt_addreg(struct target *t, struct reg *r, struct dwt_reg r->name = d->name; r->size = d->size; - r->value = &state->value; + r->value = state->value; r->arch_info = state; r->type = &dwt_reg_type; } @@ -1766,12 +1847,39 @@ fail1: */ } +static void cortex_m_dwt_free(struct target *target) +{ + struct cortex_m_common *cm = target_to_cm(target); + struct reg_cache *cache = cm->dwt_cache; + + free(cm->dwt_comparator_list); + cm->dwt_comparator_list = NULL; + cm->dwt_num_comp = 0; + + if (cache) { + register_unlink_cache(&target->reg_cache, cache); + + if (cache->reg_list) { + for (size_t i = 0; i < cache->num_regs; i++) + free(cache->reg_list[i].arch_info); + free(cache->reg_list); + } + free(cache); + } + cm->dwt_cache = NULL; +} + #define MVFR0 0xe000ef40 #define MVFR1 0xe000ef44 #define MVFR0_DEFAULT_M4 0x10110021 #define MVFR1_DEFAULT_M4 0x11000011 +#define MVFR0_DEFAULT_M7_SP 0x10110021 +#define MVFR0_DEFAULT_M7_DP 0x10110221 +#define MVFR1_DEFAULT_M7_SP 0x11000011 +#define MVFR1_DEFAULT_M7_DP 0x12000011 + int cortex_m_examine(struct target *target) { int retval; @@ -1784,7 +1892,23 @@ int cortex_m_examine(struct target *target) /* stlink shares the examine handler but does not support * all its calls */ if (!armv7m->stlink) { - retval = ahbap_debugport_init(swjdp); + retval = dap_dp_init(swjdp); + if (retval != ERROR_OK) { + LOG_ERROR("Could not initialize the debug port"); + return retval; + } + + /* Search for the MEM-AP */ + retval = dap_find_ap(swjdp, AP_TYPE_AHB_AP, &armv7m->debug_ap); + if (retval != ERROR_OK) { + LOG_ERROR("Could not find MEM-AP to control the core"); + return retval; + } + + /* Leave (only) generic DAP stuff for debugport_init(); */ + armv7m->debug_ap->memaccess_tck = 8; + + retval = mem_ap_init(armv7m->debug_ap); if (retval != ERROR_OK) return retval; } @@ -1802,25 +1926,74 @@ int cortex_m_examine(struct target *target) 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) { + 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!"); + } LOG_DEBUG("cpuid: 0x%8.8" PRIx32 "", cpuid); - /* test for floating point feature on cortex-m4 */ if (i == 4) { 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; } + } else if (i == 7) { + 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; + } 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; + } } else if (i == 0) { /* Cortex-M0 does not support unaligned memory access */ armv7m->arm.is_armv6m = true; } - if (i == 4 || i == 3) { - /* Cortex-M3/M4 has 4096 bytes autoincrement range */ - armv7m->dap.tar_autoincr_block = (1 << 12); + 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; + } + + if (!armv7m->stlink) { + if (i == 3 || i == 4) + /* 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); + } + + /* Configure trace modules */ + retval = target_write_u32(target, DCB_DEMCR, TRCENA | armv7m->demcr); + if (retval != ERROR_OK) + return retval; + + if (armv7m->trace_config.config_type != DISABLED) { + armv7m_trace_tpiu_config(target); + armv7m_trace_itm_config(target); } /* NOTE: FPB and DWT are both optional. */ @@ -1832,6 +2005,10 @@ int cortex_m_examine(struct target *target) 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; + free(cortex_m->fp_comparator_list); cortex_m->fp_comparator_list = calloc( cortex_m->fp_num_code + cortex_m->fp_num_lit, sizeof(struct cortex_m_fp_comparator)); @@ -1850,6 +2027,7 @@ int cortex_m_examine(struct target *target) cortex_m->fp_num_lit); /* Setup DWT */ + cortex_m_dwt_free(target); cortex_m_dwt_setup(cortex_m, target); /* These hardware breakpoints only work for code in flash! */ @@ -1865,12 +2043,11 @@ int cortex_m_examine(struct target *target) static int cortex_m_dcc_read(struct target *target, uint8_t *value, uint8_t *ctrl) { struct armv7m_common *armv7m = target_to_armv7m(target); - struct adiv5_dap *swjdp = armv7m->arm.dap; uint16_t dcrdr; uint8_t buf[2]; int retval; - retval = mem_ap_read(swjdp, buf, 2, 1, DCB_DCRDR, false); + retval = mem_ap_read_buf_noincr(armv7m->debug_ap, buf, 2, 1, DCB_DCRDR); if (retval != ERROR_OK) return retval; @@ -1884,7 +2061,7 @@ static int cortex_m_dcc_read(struct target *target, uint8_t *value, uint8_t *ctr * signify we have read data */ if (dcrdr & (1 << 0)) { target_buffer_set_u16(target, buf, 0); - retval = mem_ap_write(swjdp, buf, 2, 1, DCB_DCRDR, false); + retval = mem_ap_write_buf_noincr(armv7m->debug_ap, buf, 2, 1, DCB_DCRDR); if (retval != ERROR_OK) return retval; } @@ -1900,7 +2077,9 @@ static int cortex_m_target_request_data(struct target *target, uint32_t i; for (i = 0; i < (size * 4); i++) { - cortex_m_dcc_read(target, &data, &ctrl); + int retval = cortex_m_dcc_read(target, &data, &ctrl); + if (retval != ERROR_OK) + return retval; buffer[i] = data; } @@ -1919,8 +2098,11 @@ static int cortex_m_handle_target_request(void *priv) if (target->state == TARGET_RUNNING) { uint8_t data; uint8_t ctrl; + int retval; - cortex_m_dcc_read(target, &data, &ctrl); + retval = cortex_m_dcc_read(target, &data, &ctrl); + if (retval != ERROR_OK) + return retval; /* check if we have data */ if (ctrl & (1 << 0)) { @@ -1928,12 +2110,12 @@ static int cortex_m_handle_target_request(void *priv) /* we assume target is quick enough */ request = data; - cortex_m_dcc_read(target, &data, &ctrl); - request |= (data << 8); - cortex_m_dcc_read(target, &data, &ctrl); - request |= (data << 16); - cortex_m_dcc_read(target, &data, &ctrl); - request |= (data << 24); + for (int i = 1; i <= 3; i++) { + retval = cortex_m_dcc_read(target, &data, &ctrl); + if (retval != ERROR_OK) + return retval; + request |= ((uint32_t)data << (i * 8)); + } target_request(target, request); } } @@ -1944,29 +2126,23 @@ static int cortex_m_handle_target_request(void *priv) static int cortex_m_init_arch_info(struct target *target, struct cortex_m_common *cortex_m, struct jtag_tap *tap) { - int retval; struct armv7m_common *armv7m = &cortex_m->armv7m; armv7m_init_arch_info(target, armv7m); - /* prepare JTAG information for the new target */ - cortex_m->jtag_info.tap = tap; - cortex_m->jtag_info.scann_size = 4; + /* tap has no dap initialized */ + if (!tap->dap) { + tap->dap = dap_init(); + + /* Leave (only) generic DAP stuff for debugport_init() */ + tap->dap->tap = tap; + } /* default reset mode is to use srst if fitted * if not it will use CORTEX_M3_RESET_VECTRESET */ cortex_m->soft_reset_config = CORTEX_M_RESET_VECTRESET; - armv7m->arm.dap = &armv7m->dap; - - /* Leave (only) generic DAP stuff for debugport_init(); */ - armv7m->dap.jtag_info = &cortex_m->jtag_info; - armv7m->dap.memaccess_tck = 8; - - /* Cortex-M3/M4 has 4096 bytes autoincrement range - * but set a safe default to 1024 to support Cortex-M0 - * this will be changed in cortex_m3_examine if a M3/M4 is detected */ - armv7m->dap.tar_autoincr_block = (1 << 10); + armv7m->arm.dap = tap->dap; /* register arch-specific functions */ armv7m->examine_debug_reason = cortex_m_examine_debug_reason; @@ -1980,10 +2156,6 @@ static int cortex_m_init_arch_info(struct target *target, target_register_timer_callback(cortex_m_handle_target_request, 1, 1, target); - retval = arm_jtag_setup_connection(&cortex_m->jtag_info); - if (retval != ERROR_OK) - return retval; - return ERROR_OK; } @@ -2034,7 +2206,6 @@ COMMAND_HANDLER(handle_cortex_m_vector_catch_command) struct target *target = get_current_target(CMD_CTX); struct cortex_m_common *cortex_m = target_to_cm(target); struct armv7m_common *armv7m = &cortex_m->armv7m; - struct adiv5_dap *swjdp = armv7m->arm.dap; uint32_t demcr = 0; int retval; @@ -2042,7 +2213,7 @@ COMMAND_HANDLER(handle_cortex_m_vector_catch_command) if (retval != ERROR_OK) return retval; - retval = mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &demcr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DEMCR, &demcr); if (retval != ERROR_OK) return retval; @@ -2079,10 +2250,10 @@ write: demcr |= catch; /* write, but don't assume it stuck (why not??) */ - retval = mem_ap_write_u32(swjdp, DCB_DEMCR, demcr); + retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DEMCR, demcr); if (retval != ERROR_OK) return retval; - retval = mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &demcr); + retval = mem_ap_read_atomic_u32(armv7m->debug_ap, DCB_DEMCR, &demcr); if (retval != ERROR_OK) return retval; @@ -2208,6 +2379,9 @@ static const struct command_registration cortex_m_command_handlers[] = { { .chain = armv7m_command_handlers, }, + { + .chain = armv7m_trace_command_handlers, + }, { .name = "cortex_m", .mode = COMMAND_EXEC, @@ -2255,4 +2429,5 @@ struct target_type cortexm_target = { .target_create = cortex_m_target_create, .init_target = cortex_m_init_target, .examine = cortex_m_examine, + .deinit_target = cortex_m_deinit_target, };