arch/sh/cpu/sh2/start.S

   1 /*
   2  * Copyright (C) 2007,2008 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
   3  * Copyright (C) 2008 Renesas Solutions Corp.
   4
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <asm-offsets.h>
   9 #include <config.h>
  10 #include <version.h>
  11
  12         .text
  13         .align  2
  14
  15         .global _start
  16 _sh_start:
  17         .long 0x00000010        /* Ppower ON reset PC*/
  18         .long 0x00000000
  19         .long 0x00000010        /* Manual reset PC */
  20         .long 0x00000000
  21 _init:
  22         mov.l   ._lowlevel_init, r0
  23 100:    bsrf    r0
  24         nop
  25         bsr     1f
  26         nop
  27 1:      sts     pr, r5
  28         mov.l   ._reloc_dst, r4
  29         add     #(_sh_start-1b), r5
  30         mov.l   ._reloc_dst_end, r6
  31
  32 2:      mov.l   @r5+, r1
  33         mov.l   r1, @r4
  34         add     #4, r4
  35         cmp/hs  r6, r4
  36         bf      2b
  37
  38         mov.l   ._bss_start, r4
  39         mov.l   ._bss_end, r5
  40         mov     #0, r1
  41
  42 3:      mov.l   r1, @r4                 /* bss clear */
  43         add     #4, r4
  44         cmp/hs  r5, r4
  45         bf      3b
  46
  47         mov.l   ._gd_init, r13          /* global data */
  48         mov.l   ._stack_init, r15       /* stack */
  49
  50         mov.l   ._sh_generic_init, r0
  51         jsr     @r0
  52         nop
  53
  54 loop:
  55         bra     loop
  56
  57         .align  2
  58
  59 ._lowlevel_init:        .long   (lowlevel_init - (100b + 4))
  60 ._reloc_dst:            .long   reloc_dst
  61 ._reloc_dst_end:        .long   reloc_dst_end
  62 ._bss_start:            .long   bss_start
  63 ._bss_end:              .long   bss_end
  64 ._gd_init:              .long   (_sh_start - GENERATED_GBL_DATA_SIZE)
  65 ._stack_init:   .long   (_sh_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16)
  66 ._sh_generic_init:      .long   sh_generic_init