Move kboot related code to shared/kboot.[ch] because it'll be reused by the firmwares of the add-ons.

shared/kboot.c

@@ -0,0 +1,12 @@
+#include "kboot.h"
+
+void JumpToKboot(void) {
+    uint32_t runBootloaderAddress;
+    void (*runBootloader)(void *arg);
+
+    // Read the function address from the ROM API tree.
+    runBootloaderAddress = **(uint32_t **)(0x1c00001c);
+    runBootloader = (void (*)(void * arg))runBootloaderAddress;
+
+    runBootloader(NULL);
+}

shared/kboot.h

@@ -0,0 +1,41 @@
+#ifndef __KBOOT_H__
+#define __KBOOT_H__
+
+// Includes:
+
+    #include <stdint.h>
+    #include <stddef.h>
+
+// Macros:
+
+    // bits for bootloader_config_t.enabledPeripherals
+    #define ENABLE_PERIPHERAL_UART     (1<<0)
+    #define ENABLE_PERIPHERAL_I2C      (1<<1)
+    #define ENABLE_PERIPHERAL_SPI      (1<<2)
+    #define ENABLE_PERIPHERAL_CAN      (1<<3)
+    #define ENABLE_PERIPHERAL_USB_HID  (1<<4)
+    #define ENABLE_PERIPHERAL_USB_MSC  (1<<7)
+
+// Typedefs:
+
+    typedef struct {
+        uint32_t tag;                          // Magic number to verify bootloader configuration is valid. Must be set to 'kcfg'.
+        uint32_t reserved[3];
+        uint8_t enabledPeripherals;            // Bitfield of peripherals to enable.
+                                               // bit 0 - LPUART, bit 1 - I2C, bit 2 - SPI, bit 3 - CAN, bit 4 - USB
+        uint8_t i2cSlaveAddress;               // If not 0xFF, used as the 7-bit I2C slave address.
+                                               // If 0xFF, defaults to 0x10 for I2C slave address.
+        uint16_t peripheralDetectionTimeoutMs; // Timeout in milliseconds for active peripheral detection.
+                                               // If 0xFFFF, defaults to 5 seconds.
+        uint16_t reserved2[2];
+        uint32_t reserved3;
+        uint8_t clockFlags;   // The flags in the clockFlags configuration field are enabled if the corresponding bit is cleared (0).
+                              // bit 0 - HighSpeed Enable high speed mode (i.e., 48 MHz).
+        uint8_t clockDivider; // Inverted value of the divider to use for core and bus clocks when in high speed mode.
+    } bootloader_config_t;
+
+// Functions:
+
+    extern void JumpToKboot(void);
+
+#endif