mirror of https://github.com/google/pebble
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "system/reset.h"
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#define CMSIS_COMPATIBLE
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#include <mcu.h>
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#include "board/board.h"
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#include "drivers/pmic.h"
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#include "system/bootbits.h"
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#include "kernel/core_dump.h"
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#include "kernel/util/fw_reset.h"
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#include "mcu/interrupts.h"
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#include "drivers/flash.h"
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#include "system/reboot_reason.h"
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#include "FreeRTOS.h"
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#include "task.h"
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void system_reset_prepare(bool unsafe_reset) {
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fw_prepare_for_reset(unsafe_reset);
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flash_stop();
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}
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NORETURN system_reset(void) {
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static bool failure_occurred = false;
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bool already_failed = failure_occurred;
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if (!failure_occurred) {
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// Don't overwrite failure_occurred if a failure has already occurred
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failure_occurred = boot_bit_test(BOOT_BIT_SOFTWARE_FAILURE_OCCURRED);
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}
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// Skip safe teardown if doing so the first time already caused a second reset attempt; or
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// if we're in a critical section, interrupt or if the scheduler has been suspended
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if (!already_failed && !mcu_state_is_isr() && !portIN_CRITICAL() &&
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(xTaskGetSchedulerState() == taskSCHEDULER_RUNNING)) {
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system_reset_prepare(failure_occurred /* skip BT teardown if failure occurred */);
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reboot_reason_set_restarted_safely();
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}
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// If a software failure occurred, do a core dump before resetting
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if (failure_occurred) {
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core_dump_reset(false /* don't force overwrite */);
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}
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system_hard_reset();
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}
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void system_reset_callback(void *data) {
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system_reset();
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(void)data;
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}
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NORETURN system_hard_reset(void) {
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// Don't do anything fancy here. We may be in a context where nothing works, not even
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// interrupts. Just reset us.
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NVIC_SystemReset();
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__builtin_unreachable();
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}
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