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Diffstat (limited to 'platforms/chibios/bootloaders/stm32_dfu.c')
-rw-r--r--platforms/chibios/bootloaders/stm32_dfu.c72
1 files changed, 59 insertions, 13 deletions
diff --git a/platforms/chibios/bootloaders/stm32_dfu.c b/platforms/chibios/bootloaders/stm32_dfu.c
index f845bf21e9..fba3086e7a 100644
--- a/platforms/chibios/bootloaders/stm32_dfu.c
+++ b/platforms/chibios/bootloaders/stm32_dfu.c
@@ -1,4 +1,4 @@
-/* Copyright 2021 QMK
+/* Copyright 2021-2023 QMK
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -15,12 +15,17 @@
*/
#include "bootloader.h"
+#include "util.h"
#include <ch.h>
#include <hal.h>
#include "wait.h"
-extern uint32_t __ram0_end__;
+#ifndef STM32_BOOTLOADER_RAM_SYMBOL
+# define STM32_BOOTLOADER_RAM_SYMBOL __ram0_end__
+#endif
+
+extern uint32_t STM32_BOOTLOADER_RAM_SYMBOL;
#ifndef STM32_BOOTLOADER_DUAL_BANK
# define STM32_BOOTLOADER_DUAL_BANK FALSE
@@ -72,10 +77,25 @@ void enter_bootloader_mode_if_requested(void) {}
/* This code should be checked whether it runs correctly on platforms */
# define SYMVAL(sym) (uint32_t)(((uint8_t *)&(sym)) - ((uint8_t *)0))
# define BOOTLOADER_MAGIC 0xDEADBEEF
-# define MAGIC_ADDR (unsigned long *)(SYMVAL(__ram0_end__) - 4)
+# define MAGIC_ADDR (unsigned long *)(SYMVAL(STM32_BOOTLOADER_RAM_SYMBOL) - 4)
+
+__attribute__((weak)) void bootloader_marker_enable(void) {
+ uint32_t *marker = (uint32_t *)MAGIC_ADDR;
+ *marker = BOOTLOADER_MAGIC; // set magic flag => reset handler will jump into boot loader
+}
+
+__attribute__((weak)) bool bootloader_marker_active(void) {
+ const uint32_t *marker = (const uint32_t *)MAGIC_ADDR;
+ return (*marker == BOOTLOADER_MAGIC) ? true : false;
+}
+
+__attribute__((weak)) void bootloader_marker_disable(void) {
+ uint32_t *marker = (uint32_t *)MAGIC_ADDR;
+ *marker = 0;
+}
__attribute__((weak)) void bootloader_jump(void) {
- *MAGIC_ADDR = BOOTLOADER_MAGIC; // set magic flag => reset handler will jump into boot loader
+ bootloader_marker_enable();
NVIC_SystemReset();
}
@@ -84,18 +104,44 @@ __attribute__((weak)) void mcu_reset(void) {
}
void enter_bootloader_mode_if_requested(void) {
- unsigned long *check = MAGIC_ADDR;
- if (*check == BOOTLOADER_MAGIC) {
- *check = 0;
+ if (bootloader_marker_active()) {
+ bootloader_marker_disable();
+
+ struct system_memory_vector_t {
+ uint32_t stack_top;
+ void (*entrypoint)(void);
+ };
+ const struct system_memory_vector_t *bootloader = (const struct system_memory_vector_t *)(STM32_BOOTLOADER_ADDRESS);
+
+ __disable_irq();
+
+# if defined(QMK_MCU_ARCH_CORTEX_M7)
+ SCB_DisableDCache();
+ SCB_DisableICache();
+# endif
+
+# if defined(__MPU_PRESENT) && (__MPU_PRESENT == 1U)
+ ARM_MPU_Disable();
+# endif
+
+ SysTick->CTRL = 0;
+ SysTick->VAL = 0;
+ SysTick->LOAD = 0;
+
+ // Clear interrupt enable and interrupt pending registers
+ for (int i = 0; i < ARRAY_SIZE(NVIC->ICER); i++) {
+ NVIC->ICER[i] = 0xFFFFFFFF;
+ NVIC->ICPR[i] = 0xFFFFFFFF;
+ }
+
__set_CONTROL(0);
- __set_MSP(*(__IO uint32_t *)STM32_BOOTLOADER_ADDRESS);
+ __set_MSP(bootloader->stack_top);
__enable_irq();
- typedef void (*BootJump_t)(void);
- BootJump_t boot_jump = *(BootJump_t *)(STM32_BOOTLOADER_ADDRESS + 4);
- boot_jump();
- while (1)
- ;
+ // Jump to bootloader
+ bootloader->entrypoint();
+ while (true) {
+ }
}
}
#endif