forked from mfulz_github/qmk_firmware
69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
#include "bootloader.h"
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#include "ch.h"
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#include "hal.h"
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#ifdef STM32_BOOTLOADER_ADDRESS
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/* STM32 */
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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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extern uint32_t __ram0_end__;
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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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/** \brief Jump to the bootloader
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*
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* FIXME: needs doc
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*/
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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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/** \brief Enter bootloader mode if requested
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*
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* FIXME: needs doc
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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 *)STM32_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 *)(STM32_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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#elif defined(KL2x) || defined(K20x) /* STM32_BOOTLOADER_ADDRESS */
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/* Kinetis */
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# if defined(KIIBOHD_BOOTLOADER)
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/* Kiibohd Bootloader (MCHCK and Infinity KB) */
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# define SCB_AIRCR_VECTKEY_WRITEMAGIC 0x05FA0000
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const uint8_t sys_reset_to_loader_magic[] = "\xff\x00\x7fRESET TO LOADER\x7f\x00\xff";
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void bootloader_jump(void) {
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__builtin_memcpy((void *)VBAT, (const void *)sys_reset_to_loader_magic, sizeof(sys_reset_to_loader_magic));
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// request reset
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SCB->AIRCR = SCB_AIRCR_VECTKEY_WRITEMAGIC | SCB_AIRCR_SYSRESETREQ_Msk;
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}
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# else /* defined(KIIBOHD_BOOTLOADER) */
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/* Default for Kinetis - expecting an ARM Teensy */
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# include "wait.h"
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void bootloader_jump(void) {
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wait_ms(100);
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__BKPT(0);
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}
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# endif /* defined(KIIBOHD_BOOTLOADER) */
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#else /* neither STM32 nor KINETIS */
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__attribute__((weak)) void bootloader_jump(void) {}
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#endif
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