ENTRY(reset);

MEMORY {
  flash(rx)  : ORIGIN = 0x08000000, LENGTH = 512K
  sram(rwx) : ORIGIN = 0x20000000, LENGTH = 128K
}
stack_start = ORIGIN(sram) + LENGTH(sram); /* stack points to end of sram */

SECTIONS {
  .isr_vector : {
    . = ALIGN(4);
    KEEP(*(.isr_vector))
    . = ALIGN(4);
  } > flash

  .text : { /* code and constants */
    . = ALIGN(4);
    *(.text)
    *(.text.*)
    *(.rodata)
    *(.rodata.*)
    . = ALIGN(4);
  } > flash

  _data_addr = LOADADDR(.data);
  .data : { /* intialized variables */
    . = ALIGN(4);
    _data_start = .;
    *(.data)
    *(.data.*)
    . = ALIGN(4);
    _data_end = .;
  } > sram AT > flash /* loads the section into sram, with initial values stored in flash */

  .bss : { /* unintialized variables */
    . = ALIGN(4);
    _bss_start = .;
    *(.bss)
    *(.bss.*)
    _bss_end = .;
    . = ALIGN(4);
  } > sram
}