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   1 /*
   2  * arch/ppc64/lib/copypage.S
   3  *
   4  * Copyright (C) 2002 Paul Mackerras, IBM Corp.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11 #include <asm/processor.h>
  12 #include <asm/ppc_asm.h>
  13
  14 _GLOBAL(copy_page)
  15         std     r31,-8(1)
  16         std     r30,-16(1)
  17         std     r29,-24(1)
  18         std     r28,-32(1)
  19         std     r27,-40(1)
  20         std     r26,-48(1)
  21         std     r25,-56(1)
  22         std     r24,-64(1)
  23         std     r23,-72(1)
  24         std     r22,-80(1)
  25         std     r21,-88(1)
  26         std     r20,-96(1)
  27         li      r5,4096/32 - 1
  28         addi    r3,r3,-8
  29         li      r12,5
  30 0:      addi    r5,r5,-24
  31         mtctr   r12
  32         ld      r22,640(4)
  33         ld      r21,512(4)
  34         ld      r20,384(4)
  35         ld      r11,256(4)
  36         ld      r9,128(4)
  37         ld      r7,0(4)
  38         ld      r25,648(4)
  39         ld      r24,520(4)
  40         ld      r23,392(4)
  41         ld      r10,264(4)
  42         ld      r8,136(4)
  43         ldu     r6,8(4)
  44         cmpwi   r5,24
  45 1:      std     r22,648(3)
  46         std     r21,520(3)
  47         std     r20,392(3)
  48         std     r11,264(3)
  49         std     r9,136(3)
  50         std     r7,8(3)
  51         ld      r28,648(4)
  52         ld      r27,520(4)
  53         ld      r26,392(4)
  54         ld      r31,264(4)
  55         ld      r30,136(4)
  56         ld      r29,8(4)
  57         std     r25,656(3)
  58         std     r24,528(3)
  59         std     r23,400(3)
  60         std     r10,272(3)
  61         std     r8,144(3)
  62         std     r6,16(3)
  63         ld      r22,656(4)
  64         ld      r21,528(4)
  65         ld      r20,400(4)
  66         ld      r11,272(4)
  67         ld      r9,144(4)
  68         ld      r7,16(4)
  69         std     r28,664(3)
  70         std     r27,536(3)
  71         std     r26,408(3)
  72         std     r31,280(3)
  73         std     r30,152(3)
  74         stdu    r29,24(3)
  75         ld      r25,664(4)
  76         ld      r24,536(4)
  77         ld      r23,408(4)
  78         ld      r10,280(4)
  79         ld      r8,152(4)
  80         ldu     r6,24(4)
  81         bdnz    1b
  82         std     r22,648(3)
  83         std     r21,520(3)
  84         std     r20,392(3)
  85         std     r11,264(3)
  86         std     r9,136(3)
  87         std     r7,8(3)
  88         addi    r4,r4,640
  89         addi    r3,r3,648
  90         bge     0b
  91         mtctr   r5
  92         ld      r7,0(4)
  93         ld      r8,8(4)
  94         ldu     r9,16(4)
  95 3:      ld      r10,8(4)
  96         std     r7,8(3)
  97         ld      r7,16(4)
  98         std     r8,16(3)
  99         ld      r8,24(4)
 100         std     r9,24(3)
 101         ldu     r9,32(4)
 102         stdu    r10,32(3)
 103         bdnz    3b
 104 4:      ld      r10,8(4)
 105         std     r7,8(3)
 106         std     r8,16(3)
 107         std     r9,24(3)
 108         std     r10,32(3)
 109 9:      ld      r20,-96(1)
 110         ld      r21,-88(1)
 111         ld      r22,-80(1)
 112         ld      r23,-72(1)
 113         ld      r24,-64(1)
 114         ld      r25,-56(1)
 115         ld      r26,-48(1)
 116         ld      r27,-40(1)
 117         ld      r28,-32(1)
 118         ld      r29,-24(1)
 119         ld      r30,-16(1)
 120         ld      r31,-8(1)
 121         blr