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Diffstat (limited to 'platforms/chibios/bootloaders/at32_dfu.c')
-rw-r--r--platforms/chibios/bootloaders/at32_dfu.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/platforms/chibios/bootloaders/at32_dfu.c b/platforms/chibios/bootloaders/at32_dfu.c
new file mode 100644
index 0000000000..f3a453d0fc
--- /dev/null
+++ b/platforms/chibios/bootloaders/at32_dfu.c
@@ -0,0 +1,83 @@
+// Copyright 2021-2023 QMK
+// Copyright 2023-2024 HorrorTroll <https://github.com/HorrorTroll>
+// Copyright 2023-2024 Zhaqian <https://github.com/zhaqian12>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "bootloader.h"
+#include "util.h"
+
+#include <ch.h>
+#include <hal.h>
+#include "wait.h"
+
+#ifndef AT32_BOOTLOADER_RAM_SYMBOL
+# define AT32_BOOTLOADER_RAM_SYMBOL __ram0_end__
+#endif
+
+extern uint32_t AT32_BOOTLOADER_RAM_SYMBOL;
+
+/* 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(AT32_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) {
+ bootloader_marker_enable();
+ NVIC_SystemReset();
+}
+
+__attribute__((weak)) void mcu_reset(void) {
+ NVIC_SystemReset();
+}
+
+void enter_bootloader_mode_if_requested(void) {
+ 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 *)(AT32_BOOTLOADER_ADDRESS);
+
+ __disable_irq();
+
+#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(bootloader->stack_top);
+ __enable_irq();
+
+ // Jump to bootloader
+ bootloader->entrypoint();
+ while (true) {
+ }
+ }
+}