Feat/bootloader updater

engine/HAL/STM32L0/luos_hal.c

@@ -17,6 +17,8 @@
 /*******************************************************************************
  * Variables
  ******************************************************************************/
+#define RSVD_SECTION ".rsvd.data,\"aw\",%nobits//"
+#define _RSVD        __attribute__((used, section(RSVD_SECTION)))
 // timestamp variable
 static ll_timestamp_t ll_timestamp;
 /*******************************************************************************
@@ -77,7 +79,23 @@ static void LuosHAL_SystickInit(void)
  ******************************************************************************/
 static void LuosHAL_VectorTableRemap(void)
 {
-    SCB->VTOR = LUOS_VECT_TAB;
+    /* Copy the vector table from the Flash (mapped at the base of the application
+        load address 0x0800C800) to the base address of the SRAM at 0x20000000. */
+    // check if we are at the beginning of flash
+    if (LUOS_VECT_TAB > FLASH_BASE)
+    {
+        static volatile _RSVD uint32_t VectorTable[48];
+
+        for (uint32_t i = 0; i < 48; i++)
+        {
+            VectorTable[i] = *(__IO uint32_t *)(LUOS_VECT_TAB + (i << 2));
+        }
+
+        /* Enable the SYSCFG peripheral clock*/
+        __HAL_RCC_SYSCFG_CLK_ENABLE();
+        /* Remap SRAM at 0x00000000 */
+        __HAL_SYSCFG_REMAPMEMORY_SRAM();
+    }
 }
 /******************************************************************************
  * @brief Luos HAL general systick tick at 1ms
@@ -307,7 +325,7 @@ void LuosHAL_EraseMemory(uint32_t address, uint16_t size)
 
 /******************************************************************************
  * @brief Programm flash memory
- * @param address : Start address 
+ * @param address : Start address
  * @param size :: Data size
  * @param data : Pointer to data
  * @return

engine/bootloader/bootloader_core.c

@@ -41,8 +41,10 @@ bool load_flag          = false;
 uint16_t source_id      = 0; // used to save source_id, ie gate_id
 uint32_t tickstart      = 0;
 
+    #ifndef BOOTLOADER_UPDATER
 // Create a variable of the size of mode flash value allowing to init the shared flash section
 const uint8_t __attribute__((used)) __attribute__((section(".boot_flags"))) sharedSection = BOOT_MODE;
+    #endif
 
 /*******************************************************************************
  * Function
@@ -88,7 +90,11 @@ void LuosBootloader_JumpToBootloader(void)
 void LuosBootloader_Init(void)
 {
     revision_t version = {.major = 2, .minor = 0, .build = 0};
+    #ifdef BOOTLOADER_UPDATER
+    Luos_CreateService(0, VOID_TYPE, "boot_updater", version);
+    #else
     Luos_CreateService(0, VOID_TYPE, "boot_service", version);
+    #endif
 
     // set ID node saved in flash
     LuosBootloader_SetNodeID();
@@ -161,7 +167,11 @@ void LuosBootloader_SetNodeID(void)
  ******************************************************************************/
 uint8_t LuosBootloader_IsEnoughSpace(uint32_t binary_size)
 {
+    #ifdef BOOTLOADER_UPDATER
+    uint32_t free_space = BOOT_START_ADDRESS - APP_START_ADDRESS - 1;
+    #else
     uint32_t free_space = APP_END_ADDRESS - APP_START_ADDRESS;
+    #endif
     if (free_space > binary_size)
     {
         return SUCCEED;

examples/projects/NUCLEO-F072RB/bootloader/linker/custom_bootloader_updater_script.ld

@@ -0,0 +1,189 @@
+/**
+ ******************************************************************************
+ * @file      LinkerScript.ld
+ * @author    Auto-generated by STM32CubeIDE
+ * @brief     Linker script for STM32F072RBTx Device from STM32F0 series
+ *                      128Kbytes FLASH
+ *                      16Kbytes RAM
+ *
+ *            Set heap size, stack size and stack location according
+ *            to application requirements.
+ *
+ *            Set memory bank area and size if external memory is used
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
+ * All rights reserved.</center></h2>
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ *                        opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = ORIGIN(RAM) + LENGTH(RAM);	/* end of "RAM" Ram type memory */
+
+_Min_Heap_Size = 0x200;	/* required amount of heap  */
+_Min_Stack_Size = 0x400;	/* required amount of stack */
+
+/* Memories definition */
+MEMORY
+{
+  RAM_RSVD (xrw)  : ORIGIN = 0x20000000,   LENGTH = 1K
+  RAM    (xrw)    : ORIGIN = 0x20000400,   LENGTH = 15K
+  FLASH    (rw)    : ORIGIN = 0x800C800,   LENGTH = 48K
+  SHRD_MEM (rx)    : ORIGIN = 0x800C000,   LENGTH = 2K
+}
+
+/* Sections */
+SECTIONS
+{
+  /* placing my boot flags section at given address: */
+  .boot_flags :
+  {
+    KEEP(*(.boot_flags)) /* keep my variable even if not referenced */
+  } > SHRD_MEM
+
+  /* The startup code into "FLASH" Rom type memory */
+  .isr_vector :
+  {
+    . = ALIGN(4);
+    KEEP(*(.isr_vector)) /* Startup code */
+    . = ALIGN(4);
+  } >FLASH
+
+  /* The program code and other data into "FLASH" Rom type memory */
+  .text :
+  {
+    . = ALIGN(4);
+    *(.text)           /* .text sections (code) */
+    *(.text*)          /* .text* sections (code) */
+    *(.glue_7)         /* glue arm to thumb code */
+    *(.glue_7t)        /* glue thumb to arm code */
+    *(.eh_frame)
+
+    KEEP (*(.init))
+    KEEP (*(.fini))
+
+    . = ALIGN(4);
+    _etext = .;        /* define a global symbols at end of code */
+  } >FLASH
+
+  /* Constant data into "FLASH" Rom type memory */
+  .rodata :
+  {
+    . = ALIGN(4);
+    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
+    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM.extab   : { 
+    . = ALIGN(4);
+    *(.ARM.extab* .gnu.linkonce.armextab.*)
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM : {
+    . = ALIGN(4);
+    __exidx_start = .;
+    *(.ARM.exidx*)
+    __exidx_end = .;
+    . = ALIGN(4);
+  } >FLASH
+
+  .preinit_array     :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__preinit_array_start = .);
+    KEEP (*(.preinit_array*))
+    PROVIDE_HIDDEN (__preinit_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  .init_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__init_array_start = .);
+    KEEP (*(SORT(.init_array.*)))
+    KEEP (*(.init_array*))
+    PROVIDE_HIDDEN (__init_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  .fini_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__fini_array_start = .);
+    KEEP (*(SORT(.fini_array.*)))
+    KEEP (*(.fini_array*))
+    PROVIDE_HIDDEN (__fini_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  /* Used by the startup to initialize data */
+  _sidata = LOADADDR(.data);
+
+  /* Initialized data sections into "RAM" Ram type memory */
+  .data : 
+  {
+    . = ALIGN(4);
+    _sdata = .;        /* create a global symbol at data start */
+    *(.data)           /* .data sections */
+    *(.data*)          /* .data* sections */
+
+    . = ALIGN(4);
+    _edata = .;        /* define a global symbol at data end */
+
+  } >RAM AT> FLASH
+
+  /* Uninitialized data section into "RAM" Ram type memory */
+  . = ALIGN(4);
+  .bss :
+  {
+    /* This is used by the startup in order to initialize the .bss section */
+    _sbss = .;         /* define a global symbol at bss start */
+    __bss_start__ = _sbss;
+    *(.bss)
+    *(.bss*)
+    *(COMMON)
+
+    . = ALIGN(4);
+    _ebss = .;         /* define a global symbol at bss end */
+    __bss_end__ = _ebss;
+  } >RAM
+
+  /* User_heap_stack section, used to check that there is enough "RAM" Ram  type memory left */
+  ._user_heap_stack :
+  {
+    . = ALIGN(8);
+    PROVIDE ( end = . );
+    PROVIDE ( _end = . );
+    . = . + _Min_Heap_Size;
+    . = . + _Min_Stack_Size;
+    . = ALIGN(8);
+  } >RAM
+
+  .boot_data :
+  {
+    *(.rsvd.data)
+    *(.rsvd.data*)
+  } > RAM_RSVD
+
+  /* Remove information from the compiler libraries */
+  /DISCARD/ :
+  {
+    libc.a ( * )
+    libm.a ( * )
+    libgcc.a ( * )
+  }
+
+  .ARM.attributes 0 : { *(.ARM.attributes) }
+}