grub-core/lib/mips/relocator_asm.S

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2009  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/symbol.h>
  20
  21         .p2align        4       /* force 16-byte alignment */
  22
  23         .set noreorder
  24         .set nomacro
  25
  26 VARIABLE (grub_relocator_forward_start)
  27         move $a0, $9
  28         move $a1, $10
  29
  30 copycont1:
  31         lb $11,0($8)
  32         sb $11,0($9)
  33         addiu $8, $8, 1
  34         addiu $10, $10, -1
  35         bne $10, $0, copycont1
  36          addiu $9, $9, 1
  37
  38 #include "../../kern/mips/cache_flush.S"
  39
  40 VARIABLE (grub_relocator_forward_end)
  41
  42 VARIABLE (grub_relocator_backward_start)
  43         move $a0, $9
  44         move $a1, $10
  45
  46         addu $9, $9, $10
  47         addu $8, $8, $10
  48         /* Backward movsl is implicitly off-by-one.  compensate that.  */
  49         addiu $9, $9, -1
  50         addiu $8, $8, -1
  51 copycont2:
  52         lb $11,0($8)
  53         sb $11,0($9)
  54         addiu $8, $8, -1
  55         addiu $10, $10, -1
  56         bne $10, $0, copycont2
  57          addiu $9, $9, -1
  58
  59 #include "../../kern/mips/cache_flush.S"
  60
  61 VARIABLE (grub_relocator_backward_end)