| 1 | #
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| 2 | # Copyright (c) 2006 Martin Decky
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| 3 | # All rights reserved.
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| 4 | #
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| 5 | # Redistribution and use in source and binary forms, with or without
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| 6 | # modification, are permitted provided that the following conditions
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| 7 | # are met:
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| 8 | #
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| 9 | # - Redistributions of source code must retain the above copyright
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| 10 | # notice, this list of conditions and the following disclaimer.
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| 11 | # - Redistributions in binary form must reproduce the above copyright
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| 12 | # notice, this list of conditions and the following disclaimer in the
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| 13 | # documentation and/or other materials provided with the distribution.
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| 14 | # - The name of the author may not be used to endorse or promote products
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| 15 | # derived from this software without specific prior written permission.
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| 16 | #
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| 17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | #
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| 28 |
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| 29 | #include <arch/asm/regname.h>
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| 30 | #include <arch/fpu_context_struct.h>
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| 31 | #include <arch/msr.h>
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| 32 |
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| 33 | .text
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| 34 |
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| 35 | .global fpu_context_save
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| 36 | .global fpu_context_restore
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| 37 | .global fpu_init
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| 38 | .global fpu_enable
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| 39 | .global fpu_disable
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| 40 |
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| 41 | .macro FPU_CONTEXT_STORE r
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| 42 | stfd fr0, FPU_CONTEXT_OFFSET_FR0(\r)
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| 43 | stfd fr1, FPU_CONTEXT_OFFSET_FR1(\r)
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| 44 | stfd fr2, FPU_CONTEXT_OFFSET_FR2(\r)
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| 45 | stfd fr3, FPU_CONTEXT_OFFSET_FR3(\r)
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| 46 | stfd fr4, FPU_CONTEXT_OFFSET_FR4(\r)
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| 47 | stfd fr5, FPU_CONTEXT_OFFSET_FR5(\r)
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| 48 | stfd fr6, FPU_CONTEXT_OFFSET_FR6(\r)
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| 49 | stfd fr7, FPU_CONTEXT_OFFSET_FR7(\r)
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| 50 | stfd fr8, FPU_CONTEXT_OFFSET_FR8(\r)
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| 51 | stfd fr9, FPU_CONTEXT_OFFSET_FR9(\r)
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| 52 | stfd fr10, FPU_CONTEXT_OFFSET_FR10(\r)
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| 53 | stfd fr11, FPU_CONTEXT_OFFSET_FR11(\r)
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| 54 | stfd fr12, FPU_CONTEXT_OFFSET_FR12(\r)
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| 55 | stfd fr13, FPU_CONTEXT_OFFSET_FR13(\r)
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| 56 | stfd fr14, FPU_CONTEXT_OFFSET_FR14(\r)
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| 57 | stfd fr15, FPU_CONTEXT_OFFSET_FR15(\r)
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| 58 | stfd fr16, FPU_CONTEXT_OFFSET_FR16(\r)
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| 59 | stfd fr17, FPU_CONTEXT_OFFSET_FR17(\r)
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| 60 | stfd fr18, FPU_CONTEXT_OFFSET_FR18(\r)
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| 61 | stfd fr19, FPU_CONTEXT_OFFSET_FR19(\r)
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| 62 | stfd fr20, FPU_CONTEXT_OFFSET_FR20(\r)
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| 63 | stfd fr21, FPU_CONTEXT_OFFSET_FR21(\r)
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| 64 | stfd fr22, FPU_CONTEXT_OFFSET_FR22(\r)
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| 65 | stfd fr23, FPU_CONTEXT_OFFSET_FR23(\r)
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| 66 | stfd fr24, FPU_CONTEXT_OFFSET_FR24(\r)
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| 67 | stfd fr25, FPU_CONTEXT_OFFSET_FR25(\r)
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| 68 | stfd fr26, FPU_CONTEXT_OFFSET_FR26(\r)
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| 69 | stfd fr27, FPU_CONTEXT_OFFSET_FR27(\r)
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| 70 | stfd fr28, FPU_CONTEXT_OFFSET_FR28(\r)
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| 71 | stfd fr29, FPU_CONTEXT_OFFSET_FR29(\r)
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| 72 | stfd fr30, FPU_CONTEXT_OFFSET_FR30(\r)
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| 73 | stfd fr31, FPU_CONTEXT_OFFSET_FR31(\r)
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| 74 | .endm
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| 75 |
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| 76 | .macro FPU_CONTEXT_LOAD r
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| 77 | lfd fr0, FPU_CONTEXT_OFFSET_FR0(\r)
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| 78 | lfd fr1, FPU_CONTEXT_OFFSET_FR1(\r)
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| 79 | lfd fr2, FPU_CONTEXT_OFFSET_FR2(\r)
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| 80 | lfd fr3, FPU_CONTEXT_OFFSET_FR3(\r)
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| 81 | lfd fr4, FPU_CONTEXT_OFFSET_FR4(\r)
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| 82 | lfd fr5, FPU_CONTEXT_OFFSET_FR5(\r)
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| 83 | lfd fr6, FPU_CONTEXT_OFFSET_FR6(\r)
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| 84 | lfd fr7, FPU_CONTEXT_OFFSET_FR7(\r)
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| 85 | lfd fr8, FPU_CONTEXT_OFFSET_FR8(\r)
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| 86 | lfd fr9, FPU_CONTEXT_OFFSET_FR9(\r)
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| 87 | lfd fr10, FPU_CONTEXT_OFFSET_FR10(\r)
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| 88 | lfd fr11, FPU_CONTEXT_OFFSET_FR11(\r)
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| 89 | lfd fr12, FPU_CONTEXT_OFFSET_FR12(\r)
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| 90 | lfd fr13, FPU_CONTEXT_OFFSET_FR13(\r)
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| 91 | lfd fr14, FPU_CONTEXT_OFFSET_FR14(\r)
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| 92 | lfd fr15, FPU_CONTEXT_OFFSET_FR15(\r)
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| 93 | lfd fr16, FPU_CONTEXT_OFFSET_FR16(\r)
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| 94 | lfd fr17, FPU_CONTEXT_OFFSET_FR17(\r)
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| 95 | lfd fr18, FPU_CONTEXT_OFFSET_FR18(\r)
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| 96 | lfd fr19, FPU_CONTEXT_OFFSET_FR19(\r)
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| 97 | lfd fr20, FPU_CONTEXT_OFFSET_FR20(\r)
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| 98 | lfd fr21, FPU_CONTEXT_OFFSET_FR21(\r)
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| 99 | lfd fr22, FPU_CONTEXT_OFFSET_FR22(\r)
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| 100 | lfd fr23, FPU_CONTEXT_OFFSET_FR23(\r)
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| 101 | lfd fr24, FPU_CONTEXT_OFFSET_FR24(\r)
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| 102 | lfd fr25, FPU_CONTEXT_OFFSET_FR25(\r)
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| 103 | lfd fr26, FPU_CONTEXT_OFFSET_FR26(\r)
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| 104 | lfd fr27, FPU_CONTEXT_OFFSET_FR27(\r)
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| 105 | lfd fr28, FPU_CONTEXT_OFFSET_FR28(\r)
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| 106 | lfd fr29, FPU_CONTEXT_OFFSET_FR29(\r)
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| 107 | lfd fr30, FPU_CONTEXT_OFFSET_FR30(\r)
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| 108 | lfd fr31, FPU_CONTEXT_OFFSET_FR31(\r)
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| 109 | .endm
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| 110 |
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| 111 | fpu_context_save:
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| 112 | FPU_CONTEXT_STORE r3
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| 113 |
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| 114 | mffs fr0
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| 115 | stfd fr0, FPU_CONTEXT_OFFSET_FPSCR(r3)
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| 116 |
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| 117 | blr
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| 118 |
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| 119 | fpu_context_restore:
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| 120 | lfd fr0, FPU_CONTEXT_OFFSET_FPSCR(r3)
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| 121 | mtfsf 0xff, fr0
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| 122 |
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| 123 | FPU_CONTEXT_LOAD r3
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| 124 |
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| 125 | blr
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| 126 |
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| 127 | fpu_init:
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| 128 | mfmsr r0
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| 129 | ori r0, r0, MSR_FP
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| 130 |
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| 131 | # Disable FPU exceptions
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| 132 | li r3, MSR_FE0 | MSR_FE1
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| 133 | andc r0, r0, r3
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| 134 |
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| 135 | mtmsr r0
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| 136 | isync
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| 137 |
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| 138 | blr
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| 139 |
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| 140 | fpu_enable:
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| 141 | mfmsr r0
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| 142 | ori r0, r0, MSR_FP
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| 143 | mtmsr r0
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| 144 | isync
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| 145 | blr
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| 146 |
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| 147 | fpu_disable:
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| 148 | mfmsr r0
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| 149 | li r3, MSR_FP
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| 150 | andc r0, r0, r3
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| 151 | mtmsr r0
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| 152 | isync
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| 153 | blr
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