/*
*****************************************************************************
**
**  File        : stm32f4_flash.ld
**
**  Abstract    : Linker script for STM32F439 Device with
**                2MByte FLASH, 192KByte SRAM, 64KByte CCM
**
**                Set heap size, stack size and stack location according
**                to application requirements.
**
**                Set memory bank area and size if external memory is used.
**
**  Target      : STMicroelectronics STM32
**
*****************************************************************************
*/

/* Entry Point */
ENTRY(Reset_Handler)

/* Highest address of the user mode stack */
_estack = 0x10010000;    /* end of 64K CCM */
_heap_end = 0xC0800000;  /* end of 8192K SDRAM */

/* Generate a link error if heap and stack don't fit into RAM */
_Min_Heap_Size = 4096K;      /* required amount of heap  */
_Main_Stack_Size = 8192; /* required amount of stack for interrupt stack (Main stack) */

/* Main stack end */
_main_stack_start = _estack - _Main_Stack_Size;

/* Specify the memory areas */
MEMORY
{
  FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 2048K
  RAM (xrw)       : ORIGIN = 0x20000000, LENGTH = 192K
  CCM (xrw)       : ORIGIN = 0x10000000, LENGTH = 64K
  MEMORY_B1 (rx)  : ORIGIN = 0x60000000, LENGTH = 0K
  SDRAM(xrw)      : ORIGIN = 0xC0000000, LENGTH = 8192K
}

/* Define output sections */
SECTIONS
{
  /* The startup code goes first into FLASH */

  /* The program code and other data goes into FLASH */
  .text :
  {
    FILL(0xFFFF)
      
    CREATE_OBJECT_SYMBOLS
  
    KEEP(*(.bootloader)) /* Bootloader code */

    . = 0x20000;         /* Set the start of the main program */
    _stext = .;          /* Provide the name for the start of this section */
    . = ALIGN(4);
    KEEP(*(.isr_vector)) /* Startup code */
    KEEP(*(.fwversiondata))
    *(.text)           /* .text sections (code) */
    *(.text*)          /* .text* sections (code) */
    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
    *(.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

  .ARM.extab   :
  { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
    .ARM : {
    __exidx_start = .;
      *(.ARM.exidx*)
      __exidx_end = .;
  } >FLASH

  .preinit_array     :
  {
    PROVIDE_HIDDEN (__preinit_array_start = .);
    KEEP (*(.preinit_array*))
    PROVIDE_HIDDEN (__preinit_array_end = .);
  } >FLASH

  .init_array :
  {
    PROVIDE_HIDDEN (__init_array_start = .);
    KEEP (*(SORT(.init_array.*)))
    KEEP (*(.init_array*))
    PROVIDE_HIDDEN (__init_array_end = .);
  } >FLASH

  .fini_array :
  {
    PROVIDE_HIDDEN (__fini_array_start = .);
    KEEP (*(.fini_array*))
    KEEP (*(SORT(.fini_array.*)))
    PROVIDE_HIDDEN (__fini_array_end = .);
  } >FLASH

  /* used by the startup to initialize data */
  _sidata = .;

  /* Initialized data sections goes into RAM, load LMA copy after code */
  .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 */
  .bss :
  {
    . = ALIGN(4);
    /* This is used by the startup in order to initialize the .bss secion */
    _sbss = .;         /* define a global symbol at bss start */
    /* __bss_start__ = _sbss; */
    *(.bss)
    *(.bss*)
    *(COMMON)
    . = ALIGN(4);
    _ebss = .;         /* define a global symbol at bss end */
  } >RAM

  /* Non-zeroed data section */
  . = ALIGN(4);
  .noinit (NOLOAD) :
  {
    *(.noinit)
  } >RAM

  /* collect all uninitialized .ccm sections */
  .ram (NOLOAD) :
  {
    . = ALIGN(4);
    _sram = .;
    *(.ram)
  } >RAM

  .ccm (NOLOAD) :
  {
    . = ALIGN(4);
    _sccm = .;
    *(.ccm)
    . = ALIGN(4);
    . = . + _Main_Stack_Size;
    _eccm = .;
  } >CCM

  /* MEMORY_bank1 section, code must be located here explicitly            */
  /* Example: extern int foo(void) __attribute__ ((section (".mb1text"))); */
  .memory_b1_text :
  {
    *(.mb1text)        /* .mb1text sections (code) */
    *(.mb1text*)       /* .mb1text* sections (code)  */
    *(.mb1rodata)      /* read-only data (constants) */
    *(.mb1rodata*)
  } >MEMORY_B1
  
  .sdram (NOLOAD) :
  {
    *(.sdram)
    *(.sdram*)
    *(.sdram_rodata)
    *(.sdram_rodata*)
    _eram = .;
    . = ALIGN(4);
    . = . + _Min_Heap_Size;
    . = ALIGN(4);
  } >SDRAM

  PROVIDE ( end = _eram );
  PROVIDE ( _end = _eram );
  
  /* Remove information from the standard libraries */
  /DISCARD/ :
  {
    libc.a ( * )
    libm.a ( * )
    libgcc.a ( * )
  }

  .ARM.attributes 0 : { *(.ARM.attributes) }
}