tms570ls3137从flash拷贝代码到ram运行

各位大神，

我用GCC编译器生成了bootloader，请问怎么把代码从flash拷贝到ram运行？这是我的链接脚本文件：

/*----------------------------------------------------------------------------*/
/* sys_link.ld                                                              */
/*                                                                            */
/* (c) Texas Instruments 2009-2013, All rights reserved.                      */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/* Entry Point */
ENTRY(_c_int00)

/* Highest address of the stack */
_estack = 0x8040000;    /* end of 256K RAM */

/* Generate a link error if heap and stack don't fit into RAM */
_Min_Heap_Size = 0x400;      /* required amount of heap  */

/* Specify the memory areas */
MEMORY
{
  VECTORS(rx)     : ORIGIN = 0x00000000, LENGTH = 0x00000020
  FLASH  (rx)     : ORIGIN = 0x00000020, LENGTH = (0x0017FFE0 + 0x00180000)
  CPU_STACK (rw)  : ORIGIN = 0x08000000, LENGTH = 0x00001500 /* Stack is configured in sys_core.asm */
  RAM (xrw)       : ORIGIN = 0x08001500, LENGTH = 0x0003EB00
  MEMORY_B1 (rx)  : ORIGIN = 0x60000000, LENGTH = 0K
}

/* Define output sections */
SECTIONS
{
  /* The ISR vector goes first into RAM */
  .intvecs :
  {
    . = ALIGN(4);
    KEEP(*(.intvecs)) /* ISR vector */
    . = ALIGN(4);
  } >VECTORS

  /* The program code and other data goes into RAM */
  .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 RAM */
  .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.*) } >RAM
    .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

  /* 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

  PROVIDE ( end = _ebss );
  PROVIDE ( _end = _ebss );

  /* 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

  /* Remove information from the standard libraries */
  /DISCARD/ :
  {
    libc.a ( * )
    libm.a ( * )
    libgcc.a ( * )
  }
  
  .ARM.attributes 0 : { *(.ARM.attributes) }
}