mirror of https://github.com/google/pebble
72 lines
2.0 KiB
C
72 lines
2.0 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 "drivers/dbgserial.h"
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#include "drivers/pwr.h"
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#include "system/bootbits.h"
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#include "system/rtc_registers.h"
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#include "git_version.auto.h"
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#include "stm32f7xx.h"
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#include <inttypes.h>
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#include <stdint.h>
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static const uint32_t s_bootloader_timestamp = GIT_TIMESTAMP;
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void boot_bit_init(void) {
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pwr_access_backup_domain(true);
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if (!boot_bit_test(BOOT_BIT_INITIALIZED)) {
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RTC_WriteBackupRegister(RTC_BKP_BOOTBIT_DR, BOOT_BIT_INITIALIZED);
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}
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}
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void boot_bit_set(BootBitValue bit) {
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uint32_t current_value = RTC_ReadBackupRegister(RTC_BKP_BOOTBIT_DR);
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current_value |= bit;
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RTC_WriteBackupRegister(RTC_BKP_BOOTBIT_DR, current_value);
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}
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void boot_bit_clear(BootBitValue bit) {
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uint32_t current_value = RTC_ReadBackupRegister(RTC_BKP_BOOTBIT_DR);
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current_value &= ~bit;
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RTC_WriteBackupRegister(RTC_BKP_BOOTBIT_DR, current_value);
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}
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bool boot_bit_test(BootBitValue bit) {
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uint32_t current_value = RTC_ReadBackupRegister(RTC_BKP_BOOTBIT_DR);
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return (current_value & bit);
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}
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void boot_bit_dump(void) {
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dbgserial_print("Boot bits: ");
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dbgserial_print_hex(RTC_ReadBackupRegister(RTC_BKP_BOOTBIT_DR));
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dbgserial_newline();
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}
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void boot_version_write(void) {
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if (boot_version_read() == s_bootloader_timestamp) {
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return;
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}
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RTC_WriteBackupRegister(BOOTLOADER_VERSION_REGISTER, s_bootloader_timestamp);
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}
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uint32_t boot_version_read(void) {
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return RTC_ReadBackupRegister(BOOTLOADER_VERSION_REGISTER);
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}
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