83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
// Copyright 2021-2023 QMK
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// Copyright 2023-2024 HorrorTroll <https://github.com/HorrorTroll>
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// Copyright 2023-2024 Zhaqian <https://github.com/zhaqian12>
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "bootloader.h"
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#include "util.h"
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#include <ch.h>
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#include <hal.h>
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#include "wait.h"
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#ifndef AT32_BOOTLOADER_RAM_SYMBOL
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# define AT32_BOOTLOADER_RAM_SYMBOL __ram0_end__
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#endif
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extern uint32_t AT32_BOOTLOADER_RAM_SYMBOL;
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/* This code should be checked whether it runs correctly on platforms */
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#define SYMVAL(sym) (uint32_t)(((uint8_t *)&(sym)) - ((uint8_t *)0))
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#define BOOTLOADER_MAGIC 0xDEADBEEF
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#define MAGIC_ADDR (unsigned long *)(SYMVAL(AT32_BOOTLOADER_RAM_SYMBOL) - 4)
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__attribute__((weak)) void bootloader_marker_enable(void) {
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uint32_t *marker = (uint32_t *)MAGIC_ADDR;
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*marker = BOOTLOADER_MAGIC; // set magic flag => reset handler will jump into boot loader
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}
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__attribute__((weak)) bool bootloader_marker_active(void) {
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const uint32_t *marker = (const uint32_t *)MAGIC_ADDR;
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return (*marker == BOOTLOADER_MAGIC) ? true : false;
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}
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__attribute__((weak)) void bootloader_marker_disable(void) {
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uint32_t *marker = (uint32_t *)MAGIC_ADDR;
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*marker = 0;
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}
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__attribute__((weak)) void bootloader_jump(void) {
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bootloader_marker_enable();
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NVIC_SystemReset();
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}
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__attribute__((weak)) void mcu_reset(void) {
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NVIC_SystemReset();
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}
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void enter_bootloader_mode_if_requested(void) {
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if (bootloader_marker_active()) {
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bootloader_marker_disable();
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struct system_memory_vector_t {
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uint32_t stack_top;
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void (*entrypoint)(void);
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};
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const struct system_memory_vector_t *bootloader = (const struct system_memory_vector_t *)(AT32_BOOTLOADER_ADDRESS);
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__disable_irq();
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#if defined(__MPU_PRESENT) && (__MPU_PRESENT == 1U)
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ARM_MPU_Disable();
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#endif
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SysTick->CTRL = 0;
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SysTick->VAL = 0;
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SysTick->LOAD = 0;
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// Clear interrupt enable and interrupt pending registers
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for (int i = 0; i < ARRAY_SIZE(NVIC->ICER); i++) {
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NVIC->ICER[i] = 0xFFFFFFFF;
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NVIC->ICPR[i] = 0xFFFFFFFF;
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}
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__set_CONTROL(0);
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__set_MSP(bootloader->stack_top);
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__enable_irq();
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// Jump to bootloader
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bootloader->entrypoint();
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while (true) {
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}
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}
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}
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