loader.lik

coldfire5206芯片的boot程序

/* __START_ADDRESS :  __END_ADDRESS
 * the starting and ending address of data to load from DRAM to flash ROM
 *
 * __START_ADDRESS :  __END_ADDR_OF_FLASH_TO_DRAM
 * the starting and ending address of data to load from flash ROM to DRAM

 * FLASH_BASE_ADDR : the base address of flash ROM
 * __SP_LOADER     : the init vlaue of SP when running "loader"
 */

MEMORY
{
	vect:   org = 0x000000, len = 0x400
/*	loader: org = 0x2000, len = 0x60000	*/
	ram:    org = 0x01000, len = 0x3ff000
/*	rom:    org = 0x800040,  len = 0xd000*/
	/* Your programs are put to MEMORY "ram" ,the MEMROY "loader"
	   include the loader program's code */
}

SECTIONS
{
	.vectors : {} > vect

	GROUP : {

		.text (TEXT) : {
		__START_ADDRESS = . ;
			 *(start) *(.text) *(.rodata) *(.init) *(.fini) *(.eini)
			. = (.+15) & ~15;
		}
		/* Next take all small CONST data */
		.sdata2 (TEXT) : {
		. = (.+0x3) & ~0x3;
		__CHECK_ADDRESS = .;
		}

	} > ram

	GROUP : {
		.data (DATA)    : {  }
		.sdata (DATA)   : {  }

		.text(TEXT) : {
			  . = (.+0x3) & ~0x3;
			  __END_ADDR_OF_FLASH_TO_DRAM = .;
		}
		.sbss (BSS) : {   }
		.bss  (BSS) : {   }
	} >ram
}

__HEAP_START	= ADDR(.bss)+SIZEOF(.bss);
__SP_INIT	= ADDR(ram)+SIZEOF(ram);
__HEAP_END	= __SP_INIT-0x10000;
__SP_END	= __HEAP_END;
__DATA_RAM	= ADDR(.data);
__DATA_ROM	= __DATA_RAM;
__DATA_END	= ADDR(.sdata)+SIZEOF(.sdata);
__BSS_START	= ADDR(.sbss);
__BSS_END	= ADDR(.bss)+SIZEOF(.bss);
STKTOP = __SP_END;
_sys_memory = STKTOP;
_clean1 = ADDR(.bss);
_size = SIZEOF(.bss);
__START_ADDR_OF_DATA = 0x100000;
__END_ADDR_OF_DATA = 0x300000;

/* Some targets use an extra underscore in front of identifiers
 * ---------------------------------------------------------------------- */
___HEAP_START	= __HEAP_START;
___HEAP_END	= __HEAP_END;
___SP_INIT	= __SP_INIT;
___SP_END	= __SP_END;
___DATA_ROM	= __DATA_ROM;
___DATA_RAM	= __DATA_RAM;
___DATA_END	= __DATA_END;
___BSS_START	= __BSS_START;
___BSS_END	= __BSS_END;

__SP_LOADER = __SP_INIT;
__FLASH_BASE_ADDR = 0x00800000;
__PROGRAM_ADDR	= 0x800040;