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Import of the watch repository from Pebble

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Matthieu Jeanson 2024-12-12 16:43:03 -08:00 • committed by Katharine Berry
commit 3b92768480
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src/fw/kernel/reset.c Normal file
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/*
* Copyright 2024 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "system/reset.h"
#define CMSIS_COMPATIBLE
#include <mcu.h>
#include "board/board.h"
#include "drivers/pmic.h"
#include "system/bootbits.h"
#include "kernel/core_dump.h"
#include "kernel/util/fw_reset.h"
#include "mcu/interrupts.h"
#include "drivers/flash.h"
#include "system/reboot_reason.h"
#include "FreeRTOS.h"
#include "task.h"
void system_reset_prepare(bool unsafe_reset) {
fw_prepare_for_reset(unsafe_reset);
flash_stop();
}
NORETURN system_reset(void) {
static bool failure_occurred = false;
bool already_failed = failure_occurred;
if (!failure_occurred) {
// Don't overwrite failure_occurred if a failure has already occurred
failure_occurred = boot_bit_test(BOOT_BIT_SOFTWARE_FAILURE_OCCURRED);
}
// Skip safe teardown if doing so the first time already caused a second reset attempt; or
// if we're in a critical section, interrupt or if the scheduler has been suspended
if (!already_failed && !mcu_state_is_isr() && !portIN_CRITICAL() &&
(xTaskGetSchedulerState() == taskSCHEDULER_RUNNING)) {
system_reset_prepare(failure_occurred /* skip BT teardown if failure occured */);
reboot_reason_set_restarted_safely();
}
// If a software failure occcured, do a core dump before resetting
if (failure_occurred) {
core_dump_reset(false /* don't force overwrite */);
}
system_hard_reset();
}
void system_reset_callback(void *data) {
system_reset();
(void)data;
}
NORETURN system_hard_reset(void) {
// Don't do anything fancy here. We may be in a context where nothing works, not even
// interrupts. Just reset us.
NVIC_SystemReset();
__builtin_unreachable();
}