stm32g474ceux_flash.ld

/*
******************************************************************************
**

**  File        : LinkerScript.ld
**
**  Author		: STM32CubeMX
**
**  Abstract    : Linker script for STM32G474CEUx series
**                512Kbytes FLASH and 128Kbytes RAM
**
**                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
**
**  Distribution: The file is distributed “as is,” without any warranty
**                of any kind.
**
*****************************************************************************
** @attention
**
** <h2><center>&copy; COPYRIGHT(c) 2019 STMicroelectronics</center></h2>
**
** Redistribution and use in source and binary forms, with or without modification,
** are permitted provided that the following conditions are met:
**   1. Redistributions of source code must retain the above copyright notice,
**      this list of conditions and the following disclaimer.
**   2. Redistributions in binary form must reproduce the above copyright notice,
**      this list of conditions and the following disclaimer in the documentation
**      and/or other materials provided with the distribution.
**   3. Neither the name of STMicroelectronics nor the names of its contributors
**      may be used to endorse or promote products derived from this software
**      without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
** DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**
*****************************************************************************
*/

/* Entry Point */
ENTRY(Reset_Handler)

/* Highest address of the user mode stack */
_estack = ORIGIN(RAM) + LENGTH(RAM);    /* end of RAM */
/* Generate a link error if heap and stack don't fit into RAM */
_Min_Heap_Size = 0x1000;      /* required amount of heap  */
_Min_Stack_Size = 0x1000; /* required amount of stack */

__eeprom_size = 0x1000;       /* 4K */
__msp_font_size = 0x8000;     /* 32K */

__ccm_total_size = 0x8000;   /* 32 KB CCMRAM total */
__ccm_size       = 0x3800;   /* configurable CCMRAM usage */
__ccm_free       = __ccm_total_size - __ccm_size;

/* Specify the memory areas */
MEMORY
{
  RAM (xrw)           : ORIGIN = 0x20000000, LENGTH = (96K + __ccm_free)
  FLASH (rx)          : ORIGIN = 0x08000000, LENGTH = 0x80000 - __eeprom_size - 0x4000 - 0x2000 - 0x4000 /* 512K - 4K - 16K - 8K - 16K = 468K */
  FLASH_SYS_FONT (rx) : ORIGIN = 0x08000000 + (0x80000 - __eeprom_size - __msp_font_size - 0x2000 - 0x4000), LENGTH = 0x4000 /* 16K */
  FLASH_LOGO (rx)     : ORIGIN = 0x08000000 + (0x80000 - __eeprom_size - __msp_font_size - 0x2000), LENGTH = 0x2000 /* 8K */
  FLASH_MSP_FONT (rx) : ORIGIN = 0x08000000 + (0x80000 - __eeprom_size - __msp_font_size), LENGTH = __msp_font_size
  FLASH_EEPROM (rx)   : ORIGIN = 0x08000000 + (0x80000 - __eeprom_size), LENGTH = __eeprom_size
  CCMRAM (xrw)        : ORIGIN = (0x10000000 + __ccm_free), LENGTH = __ccm_size
}

/* Define output sections */
SECTIONS
{
  /* The startup code goes first into FLASH */
  .isr_vector :
  {
    . = ALIGN(4);
    KEEP(*(.isr_vector)) /* Startup code */
    . = ALIGN(4);
  } >FLASH

  /* The program code and other data goes into FLASH */
  .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 goes into FLASH */
  .rodata :
  {
    . = ALIGN(4);
    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
    . = ALIGN(4);
  } >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 (*(SORT(.fini_array.*)))
    KEEP (*(.fini_array*))
    PROVIDE_HIDDEN (__fini_array_end = .);
  } >FLASH

  /*--- CCMRAM linker section definition ---*/
  _siccmram = LOADADDR(.ccmram);
  /* CCMRAM section */
  .ccmram :
  {
    . = ALIGN(4);
    _sccmram = .; /* define a global symbols at ccmram start */
    *(.ccmram.text)      /* functions */
    *(.ccmram.rodata)    /* read-only data */
    *(.ccmram.data)      /* initialized data */
    . = ALIGN(4);
    _eccmram = .; /* define a global symbols at ccmram end */
  } >CCMRAM AT> FLASH

  .ccmram_bss (NOLOAD) :
  {
    . = ALIGN(4);
     _sccmram_bss = .;

    *(.ccmram.bss)       /* uninitialized data */

    . = ALIGN(4);
    _eccmram_bss = .;
  } > CCMRAM
    /*--- End of CCMRAM linker section definition ---*/

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

  /* 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 */
  . = ALIGN(4);
  .bss :
  {
    /* 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 */
    __bss_end__ = _ebss;
  } >RAM

  /* User_heap_stack section, used to check that there is enough RAM left */
  ._user_heap_stack :
  {
    . = ALIGN(8);
    PROVIDE ( end = . );
    PROVIDE ( _end = . );
    . = . + _Min_Heap_Size;
    . = . + _Min_Stack_Size;
    . = ALIGN(8);
  } >RAM

  /* === Separate section for the font, aligned to 4 bytes === */
  .system_font :
    {
      . = ALIGN(4);
      __system_font_start = .;
      KEEP(*(.system_font))
      KEEP(*(.system_font.*))
      . = ALIGN(4);
      __system_font_end = .;
    } > FLASH_SYS_FONT

  .font :
  {
    . = ALIGN(4);         /* start of the section – align to 4 bytes */
    __font_start = .;
    KEEP(*(.font))        /* capture everything from the .font section */
    KEEP(*(.font.*))      /* also capture subsections .font.* */
    . = ALIGN(4);         /* end of the section – align to 4 bytes */
    __font_end = .;
  } > FLASH_MSP_FONT         /* place in the FLASH_FONT region */

  /* === Separate section for the eeprom, aligned to 4 bytes === */
  .eeprom :
  {
    . = ALIGN(4);         /* start of the section – align to 4 bytes */
    __eeprom_start = .;
    KEEP(*(.eeprom))       /* capture everything from the .eeprom section */
    KEEP(*(.eeprom.*))     /* also capture subsections .eeprom.* */
    . = ALIGN(4);         /* end of the section – align to 4 bytes */
    __eeprom_end = .;
  } > FLASH_EEPROM         /* place in the FLASH_EEPROM region */

  /* === Separate section for the logo, aligned to 4 bytes === */
  .logo :
  {
    . = ALIGN(4);         /* start of the section – align to 4 bytes */
    __logo_start = .;
    KEEP(*(.logo))        /* capture everything from the .font section */
    KEEP(*(.logo.*))      /* also capture subsections .font.* */
    . = ALIGN(4);         /* end of the section – align to 4 bytes */
    __logo_end = .;
  } > FLASH_LOGO         /* place in the FLASH_LOGO region */

  /* Remove information from the standard libraries */
  /DISCARD/ :
  {
    libc.a ( * )
    libm.a ( * )
    libgcc.a ( * )
  }

}