LXR uboot/arch/sh/cpu/sh4/start.S

   1/*
   2 * (C) Copyright 2007
   3 * Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License as
   7 * published by the Free Software Foundation; either version 2 of
   8 * the License, or (at your option) any later version.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  18 * MA 02111-1307 USA
  19 */
  20
  21#include <config.h>
  22#include <version.h>
  23
  24        .text
  25        .align  2
  26
  27        .global _start
  28_start:
  29        mov.l   ._lowlevel_init, r0
  30100:    bsrf    r0
  31        nop
  32
  33        bsr     1f
  34        nop
  351:      sts     pr, r5
  36        mov.l   ._reloc_dst, r4
  37        add     #(_start-1b), r5
  38        mov.l   ._reloc_dst_end, r6
  39
  402:      mov.l   @r5+, r1
  41        mov.l   r1, @r4
  42        add     #4, r4
  43        cmp/hs  r6, r4
  44        bf      2b
  45
  46        mov.l   ._bss_start, r4
  47        mov.l   ._bss_end, r5
  48        mov     #0, r1
  49
  503:      mov.l   r1, @r4                 /* bss clear */
  51        add     #4, r4
  52        cmp/hs  r5, r4
  53        bf      3b
  54
  55        mov.l   ._gd_init, r13          /* global data */
  56        mov.l   ._stack_init, r15       /* stack */
  57
  58        mov.l   ._sh_generic_init, r0
  59        jsr     @r0
  60        nop
  61
  62loop:
  63        bra     loop
  64
  65        .align  2
  66
  67._lowlevel_init:        .long   (lowlevel_init - (100b + 4))
  68._reloc_dst:            .long   reloc_dst
  69._reloc_dst_end:        .long   reloc_dst_end
  70._bss_start:            .long   bss_start
  71._bss_end:              .long   bss_end
  72._gd_init:              .long   (_start - CONFIG_SYS_GBL_DATA_SIZE)
  73._stack_init:           .long   (_start - CONFIG_SYS_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16)
  74._sh_generic_init:      .long   sh_generic_init
  75