X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Fcortex_m.c;h=4894cabf8bcd1d03e767810dd3bd7b65e581e657;hp=344cfcf61735fa05d1b4e3cda89f7c59068a008e;hb=HEAD;hpb=fb43f1ff4e2f0638110ffcc4e63bee8b5361db64
diff --git a/src/target/cortex_m.c b/src/target/cortex_m.c
index 344cfcf617..c225b1aa9d 100644
--- a/src/target/cortex_m.c
+++ b/src/target/cortex_m.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
@@ -8,19 +10,6 @@
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * 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, see . *
- * *
* *
* Cortex-M3(tm) TRM, ARM DDI 0337E (r1p1) and 0337G (r2p0) *
* *
@@ -39,6 +28,8 @@
#include "register.h"
#include "arm_opcodes.h"
#include "arm_semihosting.h"
+#include "smp.h"
+#include
#include
#include
@@ -59,61 +50,89 @@
/* Supported Cortex-M Cores */
static const struct cortex_m_part_info cortex_m_parts[] = {
{
- .partno = CORTEX_M0_PARTNO,
+ .impl_part = CORTEX_M0_PARTNO,
.name = "Cortex-M0",
.arch = ARM_ARCH_V6M,
},
{
- .partno = CORTEX_M0P_PARTNO,
+ .impl_part = CORTEX_M0P_PARTNO,
.name = "Cortex-M0+",
.arch = ARM_ARCH_V6M,
},
{
- .partno = CORTEX_M1_PARTNO,
+ .impl_part = CORTEX_M1_PARTNO,
.name = "Cortex-M1",
.arch = ARM_ARCH_V6M,
},
{
- .partno = CORTEX_M3_PARTNO,
+ .impl_part = CORTEX_M3_PARTNO,
.name = "Cortex-M3",
.arch = ARM_ARCH_V7M,
.flags = CORTEX_M_F_TAR_AUTOINCR_BLOCK_4K,
},
{
- .partno = CORTEX_M4_PARTNO,
+ .impl_part = 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,
+ .impl_part = CORTEX_M7_PARTNO,
.name = "Cortex-M7",
.arch = ARM_ARCH_V7M,
.flags = CORTEX_M_F_HAS_FPV5,
},
{
- .partno = CORTEX_M23_PARTNO,
+ .impl_part = CORTEX_M23_PARTNO,
.name = "Cortex-M23",
.arch = ARM_ARCH_V8M,
},
{
- .partno = CORTEX_M33_PARTNO,
+ .impl_part = CORTEX_M33_PARTNO,
.name = "Cortex-M33",
.arch = ARM_ARCH_V8M,
.flags = CORTEX_M_F_HAS_FPV5,
},
{
- .partno = CORTEX_M35P_PARTNO,
+ .impl_part = CORTEX_M35P_PARTNO,
.name = "Cortex-M35P",
.arch = ARM_ARCH_V8M,
.flags = CORTEX_M_F_HAS_FPV5,
},
{
- .partno = CORTEX_M55_PARTNO,
+ .impl_part = CORTEX_M55_PARTNO,
.name = "Cortex-M55",
.arch = ARM_ARCH_V8M,
.flags = CORTEX_M_F_HAS_FPV5,
},
+ {
+ .impl_part = CORTEX_M85_PARTNO,
+ .name = "Cortex-M85",
+ .arch = ARM_ARCH_V8M,
+ .flags = CORTEX_M_F_HAS_FPV5,
+ },
+ {
+ .impl_part = STAR_MC1_PARTNO,
+ .name = "STAR-MC1",
+ .arch = ARM_ARCH_V8M,
+ .flags = CORTEX_M_F_HAS_FPV5,
+ },
+ {
+ .impl_part = INFINEON_SLX2_PARTNO,
+ .name = "Infineon-SLx2",
+ .arch = ARM_ARCH_V8M,
+ },
+ {
+ .impl_part = REALTEK_M200_PARTNO,
+ .name = "Real-M200 (KM0)",
+ .arch = ARM_ARCH_V8M,
+ },
+ {
+ .impl_part = REALTEK_M300_PARTNO,
+ .name = "Real-M300 (KM4)",
+ .arch = ARM_ARCH_V8M,
+ .flags = CORTEX_M_F_HAS_FPV5,
+ },
};
/* forward declarations */
@@ -663,6 +682,11 @@ static int cortex_m_endreset_event(struct target *target)
register_cache_invalidate(armv7m->arm.core_cache);
+ /* TODO: invalidate also working areas (needed in the case of detected reset).
+ * Doing so will require flash drivers to test if working area
+ * is still valid in all target algo calling loops.
+ */
+
/* make sure we have latest dhcsr flags */
retval = cortex_m_read_dhcsr_atomic_sticky(target);
if (retval != ERROR_OK)
@@ -775,7 +799,7 @@ static int cortex_m_examine_exception_reason(struct target *target)
static int cortex_m_debug_entry(struct target *target)
{
- uint32_t xPSR;
+ uint32_t xpsr;
int retval;
struct cortex_m_common *cortex_m = target_to_cm(target);
struct armv7m_common *armv7m = &cortex_m->armv7m;
@@ -799,15 +823,11 @@ static int cortex_m_debug_entry(struct target *target)
return retval;
/* examine PE security state */
- bool secure_state = false;
+ uint32_t dscsr = 0;
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;
}
/* Load all registers to arm.core_cache */
@@ -826,11 +846,11 @@ static int cortex_m_debug_entry(struct target *target)
return retval;
r = arm->cpsr;
- xPSR = buf_get_u32(r->value, 0, 32);
+ xpsr = buf_get_u32(r->value, 0, 32);
/* Are we in an exception handler */
- if (xPSR & 0x1FF) {
- armv7m->exception_number = (xPSR & 0x1FF);
+ if (xpsr & 0x1FF) {
+ armv7m->exception_number = (xpsr & 0x1FF);
arm->core_mode = ARM_MODE_HANDLER;
arm->map = armv7m_msp_reg_map;
@@ -855,6 +875,7 @@ static int cortex_m_debug_entry(struct target *target)
if (armv7m->exception_number)
cortex_m_examine_exception_reason(target);
+ bool secure_state = (dscsr & DSCSR_CDS) == DSCSR_CDS;
LOG_TARGET_DEBUG(target, "entered debug state in core mode: %s at PC 0x%" PRIx32
", cpu in %s state, target->state: %s",
arm_mode_name(arm->core_mode),
@@ -871,7 +892,7 @@ static int cortex_m_debug_entry(struct target *target)
return ERROR_OK;
}
-static int cortex_m_poll(struct target *target)
+static int cortex_m_poll_one(struct target *target)
{
int detected_failure = ERROR_OK;
int retval = ERROR_OK;
@@ -934,21 +955,26 @@ static int cortex_m_poll(struct target *target)
if ((prev_target_state == TARGET_RUNNING) || (prev_target_state == TARGET_RESET)) {
retval = cortex_m_debug_entry(target);
- if (retval != ERROR_OK)
- return retval;
- if (arm_semihosting(target, &retval) != 0)
+ /* arm_semihosting needs to know registers, don't run if debug entry returned error */
+ if (retval == ERROR_OK && arm_semihosting(target, &retval) != 0)
return retval;
- target_call_event_callbacks(target, TARGET_EVENT_HALTED);
+ if (target->smp) {
+ LOG_TARGET_DEBUG(target, "postpone target event 'halted'");
+ target->smp_halt_event_postponed = true;
+ } else {
+ /* regardless of errors returned in previous code update state */
+ target_call_event_callbacks(target, TARGET_EVENT_HALTED);
+ }
}
if (prev_target_state == TARGET_DEBUG_RUNNING) {
retval = cortex_m_debug_entry(target);
- if (retval != ERROR_OK)
- return retval;
target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
}
+ if (retval != ERROR_OK)
+ return retval;
}
if (target->state == TARGET_UNKNOWN) {
@@ -981,10 +1007,113 @@ static int cortex_m_poll(struct target *target)
return retval;
}
-static int cortex_m_halt(struct target *target)
+static int cortex_m_halt_one(struct target *target);
+
+static int cortex_m_smp_halt_all(struct list_head *smp_targets)
+{
+ int retval = ERROR_OK;
+ struct target_list *head;
+
+ foreach_smp_target(head, smp_targets) {
+ struct target *curr = head->target;
+ if (!target_was_examined(curr))
+ continue;
+ if (curr->state == TARGET_HALTED)
+ continue;
+
+ int ret2 = cortex_m_halt_one(curr);
+ if (retval == ERROR_OK)
+ retval = ret2; /* store the first error code ignore others */
+ }
+ return retval;
+}
+
+static int cortex_m_smp_post_halt_poll(struct list_head *smp_targets)
+{
+ int retval = ERROR_OK;
+ struct target_list *head;
+
+ foreach_smp_target(head, smp_targets) {
+ struct target *curr = head->target;
+ if (!target_was_examined(curr))
+ continue;
+ /* skip targets that were already halted */
+ if (curr->state == TARGET_HALTED)
+ continue;
+
+ int ret2 = cortex_m_poll_one(curr);
+ if (retval == ERROR_OK)
+ retval = ret2; /* store the first error code ignore others */
+ }
+ return retval;
+}
+
+static int cortex_m_poll_smp(struct list_head *smp_targets)
+{
+ int retval = ERROR_OK;
+ struct target_list *head;
+ bool halted = false;
+
+ foreach_smp_target(head, smp_targets) {
+ struct target *curr = head->target;
+ if (curr->smp_halt_event_postponed) {
+ halted = true;
+ break;
+ }
+ }
+
+ if (halted) {
+ retval = cortex_m_smp_halt_all(smp_targets);
+
+ int ret2 = cortex_m_smp_post_halt_poll(smp_targets);
+ if (retval == ERROR_OK)
+ retval = ret2; /* store the first error code ignore others */
+
+ foreach_smp_target(head, smp_targets) {
+ struct target *curr = head->target;
+ if (!curr->smp_halt_event_postponed)
+ continue;
+
+ curr->smp_halt_event_postponed = false;
+ if (curr->state == TARGET_HALTED) {
+ LOG_TARGET_DEBUG(curr, "sending postponed target event 'halted'");
+ target_call_event_callbacks(curr, TARGET_EVENT_HALTED);
+ }
+ }
+ /* There is no need to set gdb_service->target
+ * as hwthread_update_threads() selects an interesting thread
+ * by its own
+ */
+ }
+ return retval;
+}
+
+static int cortex_m_poll(struct target *target)
{
+ int retval = cortex_m_poll_one(target);
+
+ if (target->smp) {
+ struct target_list *last;
+ last = list_last_entry(target->smp_targets, struct target_list, lh);
+ if (target == last->target)
+ /* After the last target in SMP group has been polled
+ * check for postponed halted events and eventually halt and re-poll
+ * other targets */
+ cortex_m_poll_smp(target->smp_targets);
+ }
+ return retval;
+}
+
+static int cortex_m_halt_one(struct target *target)
+{
+ int retval;
LOG_TARGET_DEBUG(target, "target->state: %s", target_state_name(target));
+ if (!target_was_examined(target)) {
+ LOG_TARGET_ERROR(target, "target non examined yet");
+ return ERROR_TARGET_NOT_EXAMINED;
+ }
+
if (target->state == TARGET_HALTED) {
LOG_TARGET_DEBUG(target, "target was already halted");
return ERROR_OK;
@@ -993,22 +1122,8 @@ static int cortex_m_halt(struct target *target)
if (target->state == TARGET_UNKNOWN)
LOG_TARGET_WARNING(target, "target was in unknown state when halt was requested");
- if (target->state == TARGET_RESET) {
- if ((jtag_get_reset_config() & RESET_SRST_PULLS_TRST) && jtag_get_srst()) {
- LOG_TARGET_ERROR(target, "can't request a halt while in reset if nSRST pulls nTRST");
- return ERROR_TARGET_FAILURE;
- } else {
- /* we came here in a reset_halt or reset_init sequence
- * debug entry was already prepared in cortex_m3_assert_reset()
- */
- target->debug_reason = DBG_REASON_DBGRQ;
-
- return ERROR_OK;
- }
- }
-
/* Write to Debug Halting Control and Status Register */
- cortex_m_write_debug_halt_mask(target, C_HALT, 0);
+ retval = 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. */
@@ -1016,7 +1131,15 @@ static int cortex_m_halt(struct target *target)
target->debug_reason = DBG_REASON_DBGRQ;
- return ERROR_OK;
+ return retval;
+}
+
+static int cortex_m_halt(struct target *target)
+{
+ if (target->smp)
+ return cortex_m_smp_halt_all(target->smp_targets);
+ else
+ return cortex_m_halt_one(target);
}
static int cortex_m_soft_reset_halt(struct target *target)
@@ -1096,8 +1219,8 @@ void cortex_m_enable_breakpoints(struct target *target)
}
}
-static int cortex_m_resume(struct target *target, int current,
- target_addr_t address, int handle_breakpoints, int debug_execution)
+static int cortex_m_restore_one(struct target *target, bool current,
+ target_addr_t *address, bool handle_breakpoints, bool debug_execution)
{
struct armv7m_common *armv7m = target_to_armv7m(target);
struct breakpoint *breakpoint = NULL;
@@ -1105,7 +1228,7 @@ static int cortex_m_resume(struct target *target, int current,
struct reg *r;
if (target->state != TARGET_HALTED) {
- LOG_TARGET_WARNING(target, "target not halted");
+ LOG_TARGET_ERROR(target, "not halted");
return ERROR_TARGET_NOT_HALTED;
}
@@ -1147,7 +1270,7 @@ static int cortex_m_resume(struct target *target, int current,
/* current = 1: continue on current pc, otherwise continue at */
r = armv7m->arm.pc;
if (!current) {
- buf_set_u32(r->value, 0, 32, address);
+ buf_set_u32(r->value, 0, 32, *address);
r->dirty = true;
r->valid = true;
}
@@ -1161,8 +1284,12 @@ static int cortex_m_resume(struct target *target, int current,
armv7m_maybe_skip_bkpt_inst(target, NULL);
resume_pc = buf_get_u32(r->value, 0, 32);
+ if (current)
+ *address = resume_pc;
- armv7m_restore_context(target);
+ int retval = armv7m_restore_context(target);
+ if (retval != ERROR_OK)
+ return retval;
/* the front-end may request us not to handle breakpoints */
if (handle_breakpoints) {
@@ -1172,34 +1299,99 @@ static int cortex_m_resume(struct target *target, int current,
LOG_TARGET_DEBUG(target, "unset breakpoint at " TARGET_ADDR_FMT " (ID: %" PRIu32 ")",
breakpoint->address,
breakpoint->unique_id);
- cortex_m_unset_breakpoint(target, breakpoint);
- cortex_m_single_step_core(target);
- cortex_m_set_breakpoint(target, breakpoint);
+ retval = cortex_m_unset_breakpoint(target, breakpoint);
+ if (retval == ERROR_OK)
+ retval = cortex_m_single_step_core(target);
+ int ret2 = cortex_m_set_breakpoint(target, breakpoint);
+ if (retval != ERROR_OK)
+ return retval;
+ if (ret2 != ERROR_OK)
+ return ret2;
}
}
+ return ERROR_OK;
+}
+
+static int cortex_m_restart_one(struct target *target, bool debug_execution)
+{
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+
/* 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;
-
/* registers are now invalid */
register_cache_invalidate(armv7m->arm.core_cache);
if (!debug_execution) {
target->state = TARGET_RUNNING;
target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
- LOG_TARGET_DEBUG(target, "target resumed at 0x%" PRIx32 "", resume_pc);
} else {
target->state = TARGET_DEBUG_RUNNING;
target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
- LOG_TARGET_DEBUG(target, "target debug resumed at 0x%" PRIx32 "", resume_pc);
}
return ERROR_OK;
}
+static int cortex_m_restore_smp(struct target *target, bool handle_breakpoints)
+{
+ struct target_list *head;
+ target_addr_t address;
+ foreach_smp_target(head, target->smp_targets) {
+ struct target *curr = head->target;
+ /* skip calling target */
+ if (curr == target)
+ continue;
+ if (!target_was_examined(curr))
+ continue;
+ /* skip running targets */
+ if (curr->state == TARGET_RUNNING)
+ continue;
+
+ int retval = cortex_m_restore_one(curr, true, &address,
+ handle_breakpoints, false);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = cortex_m_restart_one(curr, false);
+ if (retval != ERROR_OK)
+ return retval;
+
+ LOG_TARGET_DEBUG(curr, "SMP resumed at " TARGET_ADDR_FMT, address);
+ }
+ return ERROR_OK;
+}
+
+static int cortex_m_resume(struct target *target, int current,
+ target_addr_t address, int handle_breakpoints, int debug_execution)
+{
+ int retval = cortex_m_restore_one(target, !!current, &address, !!handle_breakpoints, !!debug_execution);
+ if (retval != ERROR_OK) {
+ LOG_TARGET_ERROR(target, "context restore failed, aborting resume");
+ return retval;
+ }
+
+ if (target->smp && !debug_execution) {
+ retval = cortex_m_restore_smp(target, !!handle_breakpoints);
+ if (retval != ERROR_OK)
+ LOG_WARNING("resume of a SMP target failed, trying to resume current one");
+ }
+
+ cortex_m_restart_one(target, !!debug_execution);
+ if (retval != ERROR_OK) {
+ LOG_TARGET_ERROR(target, "resume failed");
+ return retval;
+ }
+
+ LOG_TARGET_DEBUG(target, "%sresumed at " TARGET_ADDR_FMT,
+ debug_execution ? "debug " : "", address);
+
+ return ERROR_OK;
+}
+
/* int irqstepcount = 0; */
static int cortex_m_step(struct target *target, int current,
target_addr_t address, int handle_breakpoints)
@@ -1213,10 +1405,15 @@ static int cortex_m_step(struct target *target, int current,
bool isr_timed_out = false;
if (target->state != TARGET_HALTED) {
- LOG_TARGET_WARNING(target, "target not halted");
+ LOG_TARGET_ERROR(target, "not halted");
return ERROR_TARGET_NOT_HALTED;
}
+ /* Just one of SMP cores will step. Set the gdb control
+ * target to current one or gdb miss gdb-end event */
+ if (target->smp && target->gdb_service)
+ target->gdb_service->target = target;
+
/* current = 1: continue on current pc, otherwise continue at */
if (!current) {
buf_set_u32(pc->value, 0, 32, address);
@@ -1398,8 +1595,9 @@ static int cortex_m_assert_reset(struct target *target)
struct armv7m_common *armv7m = &cortex_m->armv7m;
enum cortex_m_soft_reset_config reset_config = cortex_m->soft_reset_config;
- LOG_TARGET_DEBUG(target, "target->state: %s",
- target_state_name(target));
+ LOG_TARGET_DEBUG(target, "target->state: %s,%s examined",
+ target_state_name(target),
+ target_was_examined(target) ? "" : " not");
enum reset_types jtag_reset_config = jtag_get_reset_config();
@@ -1414,28 +1612,45 @@ static int cortex_m_assert_reset(struct target *target)
}
/* some cores support connecting while srst is asserted
- * use that mode is it has been configured */
+ * use that mode if it has been configured */
bool srst_asserted = false;
- if (!target_was_examined(target)) {
- if (jtag_reset_config & RESET_HAS_SRST) {
- adapter_assert_reset();
+ if ((jtag_reset_config & RESET_HAS_SRST) &&
+ ((jtag_reset_config & RESET_SRST_NO_GATING)
+ || (!armv7m->debug_ap && !target->defer_examine))) {
+ /* If we have no debug_ap, asserting SRST is the only thing
+ * we can do now */
+ adapter_assert_reset();
+ srst_asserted = true;
+ }
+
+ /* TODO: replace the hack calling target_examine_one()
+ * as soon as a better reset framework is available */
+ if (!target_was_examined(target) && !target->defer_examine
+ && srst_asserted && (jtag_reset_config & RESET_SRST_NO_GATING)) {
+ LOG_TARGET_DEBUG(target, "Trying to re-examine under reset");
+ target_examine_one(target);
+ }
+
+ /* We need at least debug_ap to go further.
+ * Inform user and bail out if we don't have one. */
+ if (!armv7m->debug_ap) {
+ if (srst_asserted) {
if (target->reset_halt)
- LOG_TARGET_ERROR(target, "Target not examined, will not halt after reset!");
+ LOG_TARGET_ERROR(target, "Debug AP not available, will not halt after reset!");
+
+ /* Do not propagate error: reset was asserted, proceed to deassert! */
+ target->state = TARGET_RESET;
+ register_cache_invalidate(cortex_m->armv7m.arm.core_cache);
return ERROR_OK;
+
} else {
- LOG_TARGET_ERROR(target, "Target not examined, reset NOT asserted!");
+ LOG_TARGET_ERROR(target, "Debug AP not available, reset NOT asserted!");
return ERROR_FAIL;
}
}
- if ((jtag_reset_config & RESET_HAS_SRST) &&
- (jtag_reset_config & RESET_SRST_NO_GATING)) {
- adapter_assert_reset();
- srst_asserted = true;
- }
-
/* Enable debug requests */
int retval = cortex_m_read_dhcsr_atomic_sticky(target);
@@ -1483,9 +1698,8 @@ static int cortex_m_assert_reset(struct target *target)
/* srst is asserted, ignore AP access errors */
retval = ERROR_OK;
} else {
- /* Use a standard Cortex-M3 software reset mechanism.
- * We default to using VECTRESET as it is supported on all current cores
- * (except Cortex-M0, M0+ and M1 which support SYSRESETREQ only!)
+ /* Use a standard Cortex-M software reset mechanism.
+ * We default to using VECTRESET.
* This has the disadvantage of not resetting the peripherals, so a
* reset-init event handler is needed to perform any peripheral resets.
*/
@@ -1532,25 +1746,16 @@ 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)
- return retval;
- }
-
- return ERROR_OK;
+ return retval;
}
static int cortex_m_deassert_reset(struct target *target)
{
struct armv7m_common *armv7m = &target_to_cm(target)->armv7m;
- LOG_TARGET_DEBUG(target, "target->state: %s",
- target_state_name(target));
+ LOG_TARGET_DEBUG(target, "target->state: %s,%s examined",
+ target_state_name(target),
+ target_was_examined(target) ? "" : " not");
/* deassert reset lines */
adapter_deassert_reset();
@@ -1558,8 +1763,8 @@ static int cortex_m_deassert_reset(struct target *target)
enum reset_types jtag_reset_config = jtag_get_reset_config();
if ((jtag_reset_config & RESET_HAS_SRST) &&
- !(jtag_reset_config & RESET_SRST_NO_GATING) &&
- target_was_examined(target)) {
+ !(jtag_reset_config & RESET_SRST_NO_GATING) &&
+ armv7m->debug_ap) {
int retval = dap_dp_init_or_reconnect(armv7m->debug_ap->dap);
if (retval != ERROR_OK) {
@@ -1747,7 +1952,8 @@ static int cortex_m_set_watchpoint(struct target *target, struct watchpoint *wat
target_write_u32(target, comparator->dwt_comparator_address + 0,
comparator->comp);
- if ((cortex_m->dwt_devarch & 0x1FFFFF) != DWT_DEVARCH_ARMV8M) {
+ if ((cortex_m->dwt_devarch & 0x1FFFFF) != DWT_DEVARCH_ARMV8M_V2_0
+ && (cortex_m->dwt_devarch & 0x1FFFFF) != DWT_DEVARCH_ARMV8M_V2_1) {
uint32_t mask = 0, temp;
/* watchpoint params were validated earlier */
@@ -1845,8 +2051,14 @@ int cortex_m_add_watchpoint(struct target *target, struct watchpoint *watchpoint
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
- /* hardware doesn't support data value masking */
- if (watchpoint->mask != ~(uint32_t)0) {
+ /* REVISIT This DWT may well be able to watch for specific data
+ * values. Requires comparator #1 to set DATAVMATCH and match
+ * the data, and another comparator (DATAVADDR0) matching addr.
+ *
+ * NOTE: hardware doesn't support data value masking, so we'll need
+ * to check that mask is zero
+ */
+ if (watchpoint->mask != WATCHPOINT_IGNORE_DATA_VALUE_MASK) {
LOG_TARGET_DEBUG(target, "watchpoint value masks not supported");
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
@@ -1867,18 +2079,6 @@ int cortex_m_add_watchpoint(struct target *target, struct watchpoint *watchpoint
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
- /* Caller doesn't seem to be able to describe watching for data
- * values of zero; that flags "no value".
- *
- * REVISIT This DWT may well be able to watch for specific data
- * values. Requires comparator #1 to set DATAVMATCH and match
- * the data, and another comparator (DATAVADDR0) matching addr.
- */
- if (watchpoint->value) {
- LOG_TARGET_DEBUG(target, "data value watchpoint not YET supported");
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
-
cortex_m->dwt_comp_available--;
LOG_TARGET_DEBUG(target, "dwt_comp_available: %d", cortex_m->dwt_comp_available);
@@ -1891,7 +2091,7 @@ int cortex_m_remove_watchpoint(struct target *target, struct watchpoint *watchpo
/* REVISIT why check? DWT can be updated with core running ... */
if (target->state != TARGET_HALTED) {
- LOG_TARGET_WARNING(target, "target not halted");
+ LOG_TARGET_ERROR(target, "not halted");
return ERROR_TARGET_NOT_HALTED;
}
@@ -1904,7 +2104,7 @@ int cortex_m_remove_watchpoint(struct target *target, struct watchpoint *watchpo
return ERROR_OK;
}
-int cortex_m_hit_watchpoint(struct target *target, struct watchpoint **hit_watchpoint)
+static int cortex_m_hit_watchpoint(struct target *target, struct watchpoint **hit_watchpoint)
{
if (target->debug_reason != DBG_REASON_WATCHPOINT)
return ERROR_FAIL;
@@ -1984,6 +2184,10 @@ static int cortex_m_init_target(struct command_context *cmd_ctx,
void cortex_m_deinit_target(struct target *target)
{
struct cortex_m_common *cortex_m = target_to_cm(target);
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+
+ if (!armv7m->is_hla_target && armv7m->debug_ap)
+ dap_put_ap(armv7m->debug_ap);
free(cortex_m->fp_comparator_list);
@@ -2152,6 +2356,7 @@ static void cortex_m_dwt_addreg(struct target *t, struct reg *r, const struct dw
r->value = state->value;
r->arch_info = state;
r->type = &dwt_reg_type;
+ r->exist = true;
}
static void cortex_m_dwt_setup(struct cortex_m_common *cm, struct target *target)
@@ -2248,30 +2453,47 @@ static void cortex_m_dwt_free(struct target *target)
cm->dwt_cache = NULL;
}
-#define MVFR0 0xe000ef40
-#define MVFR1 0xe000ef44
+static bool cortex_m_has_tz(struct target *target)
+{
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ uint32_t dauthstatus;
+
+ if (armv7m->arm.arch != ARM_ARCH_V8M)
+ return false;
+
+ int retval = target_read_u32(target, DAUTHSTATUS, &dauthstatus);
+ if (retval != ERROR_OK) {
+ LOG_WARNING("Error reading DAUTHSTATUS register");
+ return false;
+ }
+ return (dauthstatus & DAUTHSTATUS_SID_MASK) != 0;
+}
+
-#define MVFR0_DEFAULT_M4 0x10110021
-#define MVFR1_DEFAULT_M4 0x11000011
+#define MVFR0 0xE000EF40
+#define MVFR0_SP_MASK 0x000000F0
+#define MVFR0_SP 0x00000020
+#define MVFR0_DP_MASK 0x00000F00
+#define MVFR0_DP 0x00000200
-#define MVFR0_DEFAULT_M7_SP 0x10110021
-#define MVFR0_DEFAULT_M7_DP 0x10110221
-#define MVFR1_DEFAULT_M7_SP 0x11000011
-#define MVFR1_DEFAULT_M7_DP 0x12000011
+#define MVFR1 0xE000EF44
+#define MVFR1_MVE_MASK 0x00000F00
+#define MVFR1_MVE_I 0x00000100
+#define MVFR1_MVE_F 0x00000200
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)
+ if (dap_find_get_ap(swjdp, AP_TYPE_AHB3_AP, debug_ap) == ERROR_OK)
return ERROR_OK;
- return dap_find_ap(swjdp, AP_TYPE_AHB5_AP, debug_ap);
+ return dap_find_get_ap(swjdp, AP_TYPE_AHB5_AP, debug_ap);
}
int cortex_m_examine(struct target *target)
{
int retval;
- uint32_t cpuid, fpcr, mvfr0, mvfr1;
+ uint32_t cpuid, fpcr;
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);
@@ -2279,15 +2501,21 @@ int cortex_m_examine(struct target *target)
/* hla_target shares the examine handler but does not support
* all its calls */
if (!armv7m->is_hla_target) {
- if (cortex_m->apsel == DP_APSEL_INVALID) {
- /* Search for the MEM-AP */
- retval = cortex_m_find_mem_ap(swjdp, &armv7m->debug_ap);
- if (retval != ERROR_OK) {
- LOG_TARGET_ERROR(target, "Could not find MEM-AP to control the core");
- return retval;
+ if (!armv7m->debug_ap) {
+ if (cortex_m->apsel == DP_APSEL_INVALID) {
+ /* Search for the MEM-AP */
+ retval = cortex_m_find_mem_ap(swjdp, &armv7m->debug_ap);
+ if (retval != ERROR_OK) {
+ LOG_TARGET_ERROR(target, "Could not find MEM-AP to control the core");
+ return retval;
+ }
+ } else {
+ armv7m->debug_ap = dap_get_ap(swjdp, cortex_m->apsel);
+ if (!armv7m->debug_ap) {
+ LOG_ERROR("Cannot get AP");
+ return ERROR_FAIL;
+ }
}
- } else {
- armv7m->debug_ap = dap_ap(swjdp, cortex_m->apsel);
}
armv7m->debug_ap->memaccess_tck = 8;
@@ -2305,18 +2533,18 @@ int cortex_m_examine(struct target *target)
if (retval != ERROR_OK)
return retval;
- /* Get ARCH and CPU types */
- const enum cortex_m_partno core_partno = (cpuid & ARM_CPUID_PARTNO_MASK) >> ARM_CPUID_PARTNO_POS;
+ /* Inspect implementor/part to look for recognized cores */
+ unsigned int impl_part = cpuid & (ARM_CPUID_IMPLEMENTOR_MASK | ARM_CPUID_PARTNO_MASK);
for (unsigned int n = 0; n < ARRAY_SIZE(cortex_m_parts); n++) {
- if (core_partno == cortex_m_parts[n].partno) {
+ if (impl_part == cortex_m_parts[n].impl_part) {
cortex_m->core_info = &cortex_m_parts[n];
break;
}
}
if (!cortex_m->core_info) {
- LOG_TARGET_ERROR(target, "Cortex-M PARTNO 0x%x is unrecognized", core_partno);
+ LOG_TARGET_ERROR(target, "Cortex-M CPUID: 0x%x is unrecognized", cpuid);
return ERROR_FAIL;
}
@@ -2328,7 +2556,7 @@ int cortex_m_examine(struct target *target)
(uint8_t)((cpuid >> 0) & 0xf));
cortex_m->maskints_erratum = false;
- if (core_partno == CORTEX_M7_PARTNO) {
+ if (impl_part == CORTEX_M7_PARTNO) {
uint8_t rev, patch;
rev = (cpuid >> 20) & 0xf;
patch = (cpuid >> 0) & 0xf;
@@ -2340,25 +2568,37 @@ int cortex_m_examine(struct target *target)
LOG_TARGET_DEBUG(target, "cpuid: 0x%8.8" PRIx32 "", cpuid);
if (cortex_m->core_info->flags & CORTEX_M_F_HAS_FPV4) {
+ uint32_t mvfr0;
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_TARGET_DEBUG(target, "%s floating point feature FPv4_SP found", cortex_m->core_info->name);
+ if ((mvfr0 & MVFR0_SP_MASK) == MVFR0_SP) {
+ LOG_TARGET_DEBUG(target, "%s floating point feature FPv4_SP found",
+ cortex_m->core_info->name);
armv7m->fp_feature = FPV4_SP;
}
} else if (cortex_m->core_info->flags & CORTEX_M_F_HAS_FPV5) {
+ uint32_t mvfr0, mvfr1;
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_TARGET_DEBUG(target, "%s floating point feature FPv5_SP found", cortex_m->core_info->name);
+ if ((mvfr0 & MVFR0_DP_MASK) == MVFR0_DP) {
+ if ((mvfr1 & MVFR1_MVE_MASK) == MVFR1_MVE_F) {
+ LOG_TARGET_DEBUG(target, "%s floating point feature FPv5_DP + MVE-F found",
+ cortex_m->core_info->name);
+ armv7m->fp_feature = FPV5_MVE_F;
+ } else {
+ LOG_TARGET_DEBUG(target, "%s floating point feature FPv5_DP found",
+ cortex_m->core_info->name);
+ armv7m->fp_feature = FPV5_DP;
+ }
+ } else if ((mvfr0 & MVFR0_SP_MASK) == MVFR0_SP) {
+ LOG_TARGET_DEBUG(target, "%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_TARGET_DEBUG(target, "%s floating point feature FPv5_DP found", cortex_m->core_info->name);
- armv7m->fp_feature = FPV5_DP;
+ } else if ((mvfr1 & MVFR1_MVE_MASK) == MVFR1_MVE_I) {
+ LOG_TARGET_DEBUG(target, "%s floating point feature MVE-I found",
+ cortex_m->core_info->name);
+ armv7m->fp_feature = FPV5_MVE_I;
}
}
@@ -2370,7 +2610,7 @@ int cortex_m_examine(struct target *target)
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)
+ if (!cortex_m_has_tz(target))
for (size_t idx = ARMV8M_FIRST_REG; idx <= ARMV8M_LAST_REG; idx++)
armv7m->arm.core_cache->reg_list[idx].exist = false;
@@ -2384,6 +2624,20 @@ int cortex_m_examine(struct target *target)
retval = target_read_u32(target, DCB_DHCSR, &cortex_m->dcb_dhcsr);
if (retval != ERROR_OK)
return retval;
+
+ /* Don't cumulate sticky S_RESET_ST at the very first read of DHCSR
+ * as S_RESET_ST may indicate a reset that happened long time ago
+ * (most probably the power-on reset before OpenOCD was started).
+ * As we are just initializing the debug system we do not need
+ * to call cortex_m_endreset_event() in the following poll.
+ */
+ if (!cortex_m->dcb_dhcsr_sticky_is_recent) {
+ cortex_m->dcb_dhcsr_sticky_is_recent = true;
+ if (cortex_m->dcb_dhcsr & S_RESET_ST) {
+ LOG_TARGET_DEBUG(target, "reset happened some time ago, ignore");
+ cortex_m->dcb_dhcsr &= ~S_RESET_ST;
+ }
+ }
cortex_m_cumulate_dhcsr_sticky(cortex_m, cortex_m->dcb_dhcsr);
if (!(cortex_m->dcb_dhcsr & C_DEBUGEN)) {
@@ -2536,7 +2790,7 @@ static int cortex_m_init_arch_info(struct target *target,
armv7m_init_arch_info(target, armv7m);
/* default reset mode is to use srst if fitted
- * if not it will use CORTEX_M3_RESET_VECTRESET */
+ * if not it will use CORTEX_M_RESET_VECTRESET */
cortex_m->soft_reset_config = CORTEX_M_RESET_VECTRESET;
armv7m->arm.dap = dap;
@@ -2593,8 +2847,7 @@ static int cortex_m_verify_pointer(struct command_invocation *cmd,
/*
* Only stuff below this line should need to verify that its target
- * is a Cortex-M3. Everything else should have indirected through the
- * cortexm3_target structure, which is only used with CM3 targets.
+ * is a Cortex-M with available DAP access (not a HLA adapter).
*/
COMMAND_HANDLER(handle_cortex_m_vector_catch_command)
@@ -2653,7 +2906,7 @@ COMMAND_HANDLER(handle_cortex_m_vector_catch_command)
break;
}
if (i == ARRAY_SIZE(vec_ids)) {
- LOG_TARGET_ERROR(target, "No CM3 vector '%s'", CMD_ARGV[CMD_ARGC]);
+ LOG_TARGET_ERROR(target, "No Cortex-M vector '%s'", CMD_ARGV[CMD_ARGC]);
return ERROR_COMMAND_SYNTAX_ERROR;
}
}
@@ -2692,14 +2945,14 @@ COMMAND_HANDLER(handle_cortex_m_mask_interrupts_command)
struct cortex_m_common *cortex_m = target_to_cm(target);
int retval;
- static const struct jim_nvp nvp_maskisr_modes[] = {
+ static const struct 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 struct jim_nvp *n;
+ const struct nvp *n;
retval = cortex_m_verify_pointer(CMD, cortex_m);
@@ -2707,19 +2960,19 @@ COMMAND_HANDLER(handle_cortex_m_mask_interrupts_command)
return retval;
if (target->state != TARGET_HALTED) {
- command_print(CMD, "target must be stopped for \"%s\" command", CMD_NAME);
- return ERROR_OK;
+ command_print(CMD, "Error: target must be stopped for \"%s\" command", CMD_NAME);
+ return ERROR_TARGET_NOT_HALTED;
}
if (CMD_ARGC > 0) {
- n = jim_nvp_name2value_simple(nvp_maskisr_modes, CMD_ARGV[0]);
+ n = nvp_name2value(nvp_maskisr_modes, CMD_ARGV[0]);
if (!n->name)
return ERROR_COMMAND_SYNTAX_ERROR;
cortex_m->isrmasking_mode = n->value;
cortex_m_set_maskints_for_halt(target);
}
- n = jim_nvp_value2name_simple(nvp_maskisr_modes, cortex_m->isrmasking_mode);
+ n = nvp_value2name(nvp_maskisr_modes, cortex_m->isrmasking_mode);
command_print(CMD, "cortex_m interrupt mask %s", n->name);
return ERROR_OK;
@@ -2792,6 +3045,9 @@ static const struct command_registration cortex_m_exec_command_handlers[] = {
.help = "configure software reset handling",
.usage = "['sysresetreq'|'vectreset']",
},
+ {
+ .chain = smp_command_handlers,
+ },
COMMAND_REGISTRATION_DONE
};
static const struct command_registration cortex_m_command_handlers[] = {