tool/chibios/ch-bootloader-jump.patch

   1 diff --git a/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s b/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s
   2 index 51a79bb..42d07bd 100644
   3 --- a/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s
   4 +++ b/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s
   5 @@ -105,6 +105,13 @@
   6  #define CRT0_CALL_DESTRUCTORS               TRUE
   7  #endif
   8
   9 +/**
  10 + * @brief   Magic number for jumping to bootloader.
  11 + */
  12 +#if !defined(MAGIC_BOOTLOADER_NUMBER) || defined(__DOXYGEN__)
  13 +#define MAGIC_BOOTLOADER_NUMBER 0xDEADBEEF
  14 +#endif
  15 +
  16  /*===========================================================================*/
  17  /* Code section.                                                             */
  18  /*===========================================================================*/
  19 @@ -124,6 +131,17 @@
  20                  .thumb_func
  21                  .global Reset_Handler
  22  Reset_Handler:
  23 +
  24 +#ifdef STM32_BOOTLOADER_ADDRESS
  25 +                /* jump to bootloader code */
  26 +                ldr        r0, =__ram0_end__-4
  27 +                ldr        r1, =MAGIC_BOOTLOADER_NUMBER
  28 +                ldr        r2, [r0, #0]
  29 +                str        r0, [r0, #0] /* erase stored magic */
  30 +                cmp        r2, r1
  31 +                beq        Bootloader_Jump
  32 +#endif /* STM32_BOOTLOADER_ADDRESS */
  33 +
  34                  /* Interrupts are globally masked initially.*/
  35                  cpsid   i
  36
  37 @@ -242,6 +260,21 @@ endfiniloop:
  38                  ldr     r1, =__default_exit
  39                  bx      r1
  40
  41 +#ifdef STM32_BOOTLOADER_ADDRESS
  42 +/*
  43 + * Jump-to-bootloader function.
  44 + */
  45 +
  46 +                .align  2
  47 +                .thumb_func
  48 +Bootloader_Jump:
  49 +                ldr     r0, =STM32_BOOTLOADER_ADDRESS
  50 +                ldr     r1, [r0, #0]
  51 +                mov     sp, r1
  52 +                ldr     r0, [r0, #4]
  53 +                bx      r0
  54 +#endif /* STM32_BOOTLOADER_ADDRESS */
  55 +
  56  #endif
  57
  58  /** @} */
  59 diff --git a/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s b/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s
  60 index 4812a29..dca9f88 100644
  61 --- a/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s
  62 +++ b/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s
  63 @@ -140,6 +140,13 @@
  64  #define CRT0_CPACR_INIT                     0x00F00000
  65  #endif
  66
  67 +/**
  68 + * @brief   Magic number for jumping to bootloader.
  69 + */
  70 +#if !defined(MAGIC_BOOTLOADER_NUMBER) || defined(__DOXYGEN__)
  71 +#define MAGIC_BOOTLOADER_NUMBER 0xDEADBEEF
  72 +#endif
  73 +
  74  /*===========================================================================*/
  75  /* Code section.                                                             */
  76  /*===========================================================================*/
  77 @@ -164,6 +171,17 @@
  78                  .thumb_func
  79                  .global Reset_Handler
  80  Reset_Handler:
  81 +
  82 +#ifdef STM32_BOOTLOADER_ADDRESS
  83 +                /* jump to bootloader code */
  84 +                ldr        r0, =__ram0_end__-4
  85 +                ldr        r1, =MAGIC_BOOTLOADER_NUMBER
  86 +                ldr        r2, [r0, #0]
  87 +                str        r0, [r0, #0] /* erase stored magic */
  88 +                cmp        r2, r1
  89 +                beq        Bootloader_Jump
  90 +#endif /* STM32_BOOTLOADER_ADDRESS */
  91 +
  92                  /* Interrupts are globally masked initially.*/
  93                  cpsid   i
  94
  95 @@ -305,6 +323,21 @@ endfiniloop:
  96                  /* Branching to the defined exit handler.*/
  97                  b       __default_exit
  98
  99 +#ifdef STM32_BOOTLOADER_ADDRESS
 100 +/*
 101 + * Jump-to-bootloader function.
 102 + */
 103 +
 104 +                .align  2
 105 +                .thumb_func
 106 +Bootloader_Jump:
 107 +                ldr     r0, =STM32_BOOTLOADER_ADDRESS
 108 +                ldr     r1, [r0, #0]
 109 +                mov     sp, r1
 110 +                ldr     r0, [r0, #4]
 111 +                bx      r0
 112 +#endif /* STM32_BOOTLOADER_ADDRESS */
 113 +
 114  #endif /* !defined(__DOXYGEN__) */
 115
 116  /** @} */