source: rtems/c/src/lib/libbsp/m68k/mcf5235/startup/linkcmdsflash @ 384171c

/*
 *  This file contains directives for the GNU linker which are specific
 *  to the Freescale ColdFire mcf5235
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 *
 *  $Id$
 */

/*
 * declare for the MCF5235_BSP_START_FROM_FLASH
 * 0 - use debug monitor to load to ram
 * 1 - load everything from flash from scratch
 */
MCF5235_BSP_START_FROM_FLASH = 1;

/*
 * Declare some sizes.
 */
RamBase = DEFINED(RamBase) ? RamBase : 0x0;
RamSize = DEFINED(RamSize) ? RamSize : 16M;
HeapSize = DEFINED(HeapSize) ? HeapSize : 0;


/*
 * System clock speed
 */
_CPUClockSpeed = DEFINED(_CPUClockSpeed) ? _CPUClockSpeed : 150000000 ;

/*
 * Location of on-chip devices
 */
__IPSBAR = DEFINED(__IPSBAR) ? __IPSBAR : 0x40000000 ;
__SRAMBASE = DEFINED(__SRAMBASE) ? __SRAMBASE : 0x20000000 ;
_VBR = 0x0;

ENTRY(start)
/*
 *  NOTE: If loading to flash with dBUG remember to change the origin to 0xFFF00000 because that's where user flash is
 *  located.
 */
MEMORY
{
    ram : ORIGIN = 0, LENGTH = 16M
    sram : ORIGIN = 0x20000000, LENGTH = 64K
    flash : ORIGIN = 0xFFE00000, LENGTH = 2M
}

SECTIONS
{
    
    _header_offset = 0;
    
    /*
     * Text, data and bss segments
     */
    .text : {
       
       *(.text*)
        *(.ram_code)

        /*
         * C++ constructors/destructors
         */
        *(.gnu.linkonce.t.*)

        /*
         * Initialization and finalization code.
         *
         * Various files can provide initialization and finalization
         * functions.  crtbegin.o and crtend.o are two instances. The
         * body of these functions are in .init and .fini sections. We
         * accumulate the bodies here, and prepend function prologues
         * from crti.o and function epilogues from crtn.o. crti.o must
         * be linked first; crtn.o must be linked last.  Because these
         * are wildcards, it doesn't matter if the user does not
         * actually link against crti.o and crtn.o; the linker won't
         * look for a file to match a wildcard.  The wildcard also
         * means that it doesn't matter which directory crti.o and
         * crtn.o are in. 
         */
        PROVIDE (_init = .);
        *crti.o(.init)
        *(.init)
        *crtn.o(.init)
        PROVIDE (_fini = .);
        *crti.o(.fini)
        *(.fini)
        *crtn.o(.fini)

        /*
         * Special FreeBSD sysctl sections.
         */
        . = ALIGN (16);
        __start_set_sysctl_set = .;
        *(set_sysctl_*);
        __stop_set_sysctl_set = ABSOLUTE(.);
        *(set_domain_*);
        *(set_pseudo_*);


        /*
         * C++ constructors/destructors
         *
         * gcc uses crtbegin.o to find the start of the constructors
         * and destructors so we make sure it is first.  Because this
         * is a wildcard, it doesn't matter if the user does not
         * actually link against crtbegin.o; the linker won't look for
         * a file to match a wildcard.  The wildcard also means that
         * it doesn't matter which directory crtbegin.o is in. The
         * constructor and destructor list are terminated in
         * crtend.o.  The same comments apply to it.
         */
        . = ALIGN (16);
        *crtbegin.o(.ctors)
        *(.ctors)
        *crtend.o(.ctors)
        *crtbegin.o(.dtors)
        *(.dtors)
        *crtend.o(.dtors)

        /*
         * Exception frame info
         */
        . = ALIGN (16);
        *(.eh_frame)

        /*
         * Read-only data
         */
        . = ALIGN (16);
        _rodata_start = . ;
        *(.rodata*)
        *(.gnu.linkonce.r*)
        
        . = ALIGN (16);

        *(.console_gdb_xfer)
        *(.bootstrap_data)
        . = ALIGN(16);
        _estuff = .;
    PROVIDE (_etext = .);
    } >flash
        
        .data 0x4000 : AT ( ADDR(.text) + SIZEOF ( .text ) )
        {
            PROVIDE( _data_dest_start = . );
            PROVIDE( _copy_start = .);
            *(.data)
            *(.gnu.linkonce.d*)
            *(.gcc_except_table*)
            *(.jcr)
            . = ALIGN (16);
            PROVIDE (_edata = .);
        PROVIDE (_copy_end = .);
        PROVIDE (_data_dest_end = . );
        } >ram

        _data_src_start = _estuff;
        _data_src_end = _data_dest_start + SIZEOF(.data);        
        
        .bss : {
                _clear_start = .;
                *(.bss*)
                *(COMMON)
                . = ALIGN (16);
                PROVIDE (end = .);
                _clear_end = .;

                WorkAreaBase = .;
        } >ram
  /* Stabs debugging sections.  */
  .stab 0 : { *(.stab) }
  .stabstr 0 : { *(.stabstr) }
  .stab.excl 0 : { *(.stab.excl) }
  .stab.exclstr 0 : { *(.stab.exclstr) }
  .stab.index 0 : { *(.stab.index) }
  .stab.indexstr 0 : { *(.stab.indexstr) }
  .comment 0 : { *(.comment) }

PROVIDE (end_of_all = .);  
}