LXR linux/arch/mn10300/kernel/fpu-low.S

   1/* MN10300 Low level FPU management operations
   2 *
   3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public Licence
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the Licence, or (at your option) any later version.
  10 */
  11#include <asm/cpu-regs.h>
  12
  13###############################################################################
  14#
  15# void fpu_init_state(void)
  16# - initialise the FPU
  17#
  18###############################################################################
  19        .globl  fpu_init_state
  20        .type   fpu_init_state,@function
  21fpu_init_state:
  22        mov     epsw,d0
  23        or      EPSW_FE,epsw
  24
  25#ifdef CONFIG_MN10300_PROC_MN103E010
  26        nop
  27        nop
  28        nop
  29#endif
  30        fmov    0,fs0
  31        fmov    fs0,fs1
  32        fmov    fs0,fs2
  33        fmov    fs0,fs3
  34        fmov    fs0,fs4
  35        fmov    fs0,fs5
  36        fmov    fs0,fs6
  37        fmov    fs0,fs7
  38        fmov    fs0,fs8
  39        fmov    fs0,fs9
  40        fmov    fs0,fs10
  41        fmov    fs0,fs11
  42        fmov    fs0,fs12
  43        fmov    fs0,fs13
  44        fmov    fs0,fs14
  45        fmov    fs0,fs15
  46        fmov    fs0,fs16
  47        fmov    fs0,fs17
  48        fmov    fs0,fs18
  49        fmov    fs0,fs19
  50        fmov    fs0,fs20
  51        fmov    fs0,fs21
  52        fmov    fs0,fs22
  53        fmov    fs0,fs23
  54        fmov    fs0,fs24
  55        fmov    fs0,fs25
  56        fmov    fs0,fs26
  57        fmov    fs0,fs27
  58        fmov    fs0,fs28
  59        fmov    fs0,fs29
  60        fmov    fs0,fs30
  61        fmov    fs0,fs31
  62        fmov    FPCR_INIT,fpcr
  63
  64#ifdef CONFIG_MN10300_PROC_MN103E010
  65        nop
  66        nop
  67        nop
  68#endif
  69        mov     d0,epsw
  70        ret     [],0
  71
  72        .size   fpu_init_state,.-fpu_init_state
  73
  74###############################################################################
  75#
  76# void fpu_save(struct fpu_state_struct *)
  77# - save the fpu state
  78# - note that an FPU Operational exception might occur during this process
  79#
  80###############################################################################
  81        .globl  fpu_save
  82        .type   fpu_save,@function
  83fpu_save:
  84        mov     epsw,d1
  85        or      EPSW_FE,epsw            /* enable the FPU so we can access it */
  86
  87#ifdef CONFIG_MN10300_PROC_MN103E010
  88        nop
  89        nop
  90#endif
  91        mov     d0,a0
  92        fmov    fs0,(a0+)
  93        fmov    fs1,(a0+)
  94        fmov    fs2,(a0+)
  95        fmov    fs3,(a0+)
  96        fmov    fs4,(a0+)
  97        fmov    fs5,(a0+)
  98        fmov    fs6,(a0+)
  99        fmov    fs7,(a0+)
 100        fmov    fs8,(a0+)
 101        fmov    fs9,(a0+)
 102        fmov    fs10,(a0+)
 103        fmov    fs11,(a0+)
 104        fmov    fs12,(a0+)
 105        fmov    fs13,(a0+)
 106        fmov    fs14,(a0+)
 107        fmov    fs15,(a0+)
 108        fmov    fs16,(a0+)
 109        fmov    fs17,(a0+)
 110        fmov    fs18,(a0+)
 111        fmov    fs19,(a0+)
 112        fmov    fs20,(a0+)
 113        fmov    fs21,(a0+)
 114        fmov    fs22,(a0+)
 115        fmov    fs23,(a0+)
 116        fmov    fs24,(a0+)
 117        fmov    fs25,(a0+)
 118        fmov    fs26,(a0+)
 119        fmov    fs27,(a0+)
 120        fmov    fs28,(a0+)
 121        fmov    fs29,(a0+)
 122        fmov    fs30,(a0+)
 123        fmov    fs31,(a0+)
 124        fmov    fpcr,d0
 125        mov     d0,(a0)
 126#ifdef CONFIG_MN10300_PROC_MN103E010
 127        nop
 128        nop
 129#endif
 130
 131        mov     d1,epsw
 132        ret     [],0
 133
 134        .size   fpu_save,.-fpu_save
 135
 136###############################################################################
 137#
 138# void fpu_restore(struct fpu_state_struct *)
 139# - restore the fpu state
 140# - note that an FPU Operational exception might occur during this process
 141#
 142###############################################################################
 143        .globl  fpu_restore
 144        .type   fpu_restore,@function
 145fpu_restore:
 146        mov     epsw,d1
 147        or      EPSW_FE,epsw            /* enable the FPU so we can access it */
 148
 149#ifdef CONFIG_MN10300_PROC_MN103E010
 150        nop
 151        nop
 152#endif
 153        mov     d0,a0
 154        fmov    (a0+),fs0
 155        fmov    (a0+),fs1
 156        fmov    (a0+),fs2
 157        fmov    (a0+),fs3
 158        fmov    (a0+),fs4
 159        fmov    (a0+),fs5
 160        fmov    (a0+),fs6
 161        fmov    (a0+),fs7
 162        fmov    (a0+),fs8
 163        fmov    (a0+),fs9
 164        fmov    (a0+),fs10
 165        fmov    (a0+),fs11
 166        fmov    (a0+),fs12
 167        fmov    (a0+),fs13
 168        fmov    (a0+),fs14
 169        fmov    (a0+),fs15
 170        fmov    (a0+),fs16
 171        fmov    (a0+),fs17
 172        fmov    (a0+),fs18
 173        fmov    (a0+),fs19
 174        fmov    (a0+),fs20
 175        fmov    (a0+),fs21
 176        fmov    (a0+),fs22
 177        fmov    (a0+),fs23
 178        fmov    (a0+),fs24
 179        fmov    (a0+),fs25
 180        fmov    (a0+),fs26
 181        fmov    (a0+),fs27
 182        fmov    (a0+),fs28
 183        fmov    (a0+),fs29
 184        fmov    (a0+),fs30
 185        fmov    (a0+),fs31
 186        mov     (a0),d0
 187        fmov    d0,fpcr
 188#ifdef CONFIG_MN10300_PROC_MN103E010
 189        nop
 190        nop
 191        nop
 192#endif
 193
 194        mov     d1,epsw
 195        ret     [],0
 196
 197        .size   fpu_restore,.-fpu_restore
 198