arch/h8300/lib/romfs.S

   1 /* romfs move to __ebss */
   2
   3 #include <asm/linkage.h>
   4 #include <linux/config.h>
   5
   6 #if defined(__H8300H__)
   7         .h8300h
   8 #endif
   9 #if defined(__H8300S__)
  10         .h8300s
  11 #endif
  12
  13 #define BLKOFFSET 512
  14
  15         .text
  16 .globl  __move_romfs
  17 _romfs_sig_len = 8
  18
  19 __move_romfs:
  20         mov.l   #__sbss,er0
  21         mov.l   #_romfs_sig,er1
  22         mov.b   #_romfs_sig_len,r3l
  23 1:                                      /* check romfs image */
  24         mov.b   @er0+,r2l
  25         mov.b   @er1+,r2h
  26         cmp.b   r2l,r2h
  27         bne     2f
  28         dec.b   r3l
  29         bne     1b
  30
  31         /* find romfs image */
  32         mov.l   @__sbss+8,er0           /* romfs length(be) */
  33         mov.l   #__sbss,er1
  34         add.l   er0,er1                 /* romfs image end */
  35         mov.l   #__ebss,er2
  36         add.l   er0,er2                 /* distination address */
  37 #if defined(CONFIG_INTELFLASH)
  38         add.l   #BLKOFFSET,er2
  39 #endif
  40         adds    #2,er0
  41         adds    #1,er0
  42         shlr    er0
  43         shlr    er0                     /* transfer length */
  44 1:
  45         mov.l   @er1,er3                /* copy image */
  46         mov.l   er3,@er2
  47         subs    #4,er1
  48         subs    #4,er2
  49         dec.l   #1,er0
  50         bpl     1b
  51 2:
  52         rts
  53
  54         .section        .rodata
  55 _romfs_sig:
  56         .ascii  "-rom1fs-"
  57
  58         .end