forked from forks/qmk_firmware
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/* Copyright 2021 QMK
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "bootloader.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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extern uint32_t __ram0_end__;
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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(__ram0_end__) - 4)
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__attribute__((weak)) void bootloader_jump(void) {
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*MAGIC_ADDR = BOOTLOADER_MAGIC; // set magic flag => reset handler will jump into boot loader
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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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unsigned long *check = MAGIC_ADDR;
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if (*check == BOOTLOADER_MAGIC) {
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*check = 0;
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__set_CONTROL(0);
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__set_MSP(*(__IO uint32_t *)WB32_BOOTLOADER_ADDRESS);
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__enable_irq();
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typedef void (*BootJump_t)(void);
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BootJump_t boot_jump = *(BootJump_t *)(WB32_BOOTLOADER_ADDRESS + 4);
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boot_jump();
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while (1)
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;
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}
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}
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