| 1 | #
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| 2 | # Copyright (C) 2003-2004 Jakub Jermar
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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 |
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| 31 | .text
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| 32 |
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| 33 | .macro cp0_read reg
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| 34 | mfc0 $2,\reg
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| 35 | j $31
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| 36 | nop
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| 37 | .endm
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| 38 |
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| 39 | .macro cp0_write reg
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| 40 | mtc0 $4,\reg
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| 41 | j $31
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| 42 | nop
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| 43 | .endm
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| 44 |
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| 45 | .set noat
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| 46 | .set noreorder
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| 47 | .set nomacro
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| 48 |
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| 49 | .global cp0_index_read
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| 50 | .global cp0_index_write
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| 51 | .global cp0_random_read
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| 52 | .global cp0_entry_lo0_read
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| 53 | .global cp0_entry_lo0_write
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| 54 | .global cp0_entry_lo1_read
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| 55 | .global cp0_entry_lo1_write
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| 56 | .global cp0_context_read
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| 57 | .global cp0_context_write
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| 58 | .global cp0_pagemask_read
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| 59 | .global cp0_pagemask_write
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| 60 | .global cp0_wired_read
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| 61 | .global cp0_wired_write
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| 62 | .global cp0_badvaddr_read
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| 63 | .global cp0_count_read
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| 64 | .global cp0_count_write
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| 65 | .global cp0_hi_read
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| 66 | .global cp0_hi_write
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| 67 | .global cp0_compare_read
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| 68 | .global cp0_compare_write
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| 69 | .global cp0_status_read
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| 70 | .global cp0_status_write
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| 71 | .global cp0_cause_read
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| 72 | .global cp0_cause_write
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| 73 | .global cp0_epc_read
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| 74 | .global cp0_epc_write
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| 75 | .global cp0_prid_read
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| 76 |
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| 77 | cp0_index_read: cp0_read $0
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| 78 | cp0_index_write: cp0_write $0
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| 79 |
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| 80 | cp0_random_read: cp0_read $1
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| 81 |
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| 82 | cp0_entry_lo0_read: cp0_read $2
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| 83 | cp0_entry_lo0_write: cp0_write $2
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| 84 |
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| 85 | cp0_entry_lo1_read: cp0_read $3
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| 86 | cp0_entry_lo1_write: cp0_write $3
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| 87 |
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| 88 | cp0_context_read: cp0_read $4
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| 89 | cp0_context_write: cp0_write $4
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| 90 |
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| 91 | cp0_pagemask_read: cp0_read $5
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| 92 | cp0_pagemask_write: cp0_write $5
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| 93 |
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| 94 | cp0_wired_read: cp0_read $6
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| 95 | cp0_wired_write: cp0_write $6
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| 96 |
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| 97 | cp0_badvaddr_read: cp0_read $8
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| 98 |
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| 99 | cp0_count_read: cp0_read $9
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| 100 | cp0_count_write: cp0_write $9
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| 101 |
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| 102 | cp0_entry_hi_read: cp0_read $10
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| 103 | cp0_entry_hi_write: cp0_write $10
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| 104 |
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| 105 | cp0_compare_read: cp0_read $11
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| 106 | cp0_compare_write: cp0_write $11
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| 107 |
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| 108 | cp0_status_read: cp0_read $12
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| 109 | cp0_status_write: cp0_write $12
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| 110 |
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| 111 | cp0_cause_read: cp0_read $13
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| 112 | cp0_cause_write: cp0_write $13
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| 113 |
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| 114 | cp0_epc_read: cp0_read $14
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| 115 | cp0_epc_write: cp0_write $14
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| 116 |
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| 117 | cp0_prid_read: cp0_read $15
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| 118 |
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| 119 |
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| 120 | .global cpu_halt
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| 121 | cpu_halt:
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| 122 | j cpu_halt
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| 123 | nop
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| 124 |
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| 125 |
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| 126 | .global memsetb
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| 127 | memsetb:
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| 128 | j _memsetb
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| 129 | nop
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| 130 |
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| 131 | .global memcpy
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| 132 | memcpy:
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| 133 | j _memcpy
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| 134 | nop
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| 135 |
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| 136 | .macro fpu_gp_save reg ctx
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| 137 | mfc1 $t0,$\reg
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| 138 | sw $t0, \reg*4(\ctx)
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| 139 | .endm
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| 140 |
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| 141 | .macro fpu_gp_restore reg ctx
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| 142 | lw $t0, \reg*4(\ctx)
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| 143 | mtc1 $t0,$\reg
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| 144 | .endm
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| 145 |
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| 146 | .macro fpu_ct_save reg ctx
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| 147 | cfc1 $t0,$1
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| 148 | sw $t0, (\reg+32)*4(\ctx)
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| 149 | .endm
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| 150 |
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| 151 | .macro fpu_ct_restore reg ctx
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| 152 | lw $t0, (\reg+32)*4(\ctx)
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| 153 | ctc1 $t0,$\reg
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| 154 | .endm
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| 155 |
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| 156 |
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| 157 | .global fpu_context_save
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| 158 | fpu_context_save:
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| 159 | #ifdef HAVE_FPU
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| 160 | fpu_gp_save 0,$a0
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| 161 | fpu_gp_save 1,$a0
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| 162 | fpu_gp_save 2,$a0
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| 163 | fpu_gp_save 3,$a0
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| 164 | fpu_gp_save 4,$a0
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| 165 | fpu_gp_save 5,$a0
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| 166 | fpu_gp_save 6,$a0
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| 167 | fpu_gp_save 7,$a0
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| 168 | fpu_gp_save 8,$a0
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| 169 | fpu_gp_save 9,$a0
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| 170 | fpu_gp_save 10,$a0
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| 171 | fpu_gp_save 11,$a0
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| 172 | fpu_gp_save 12,$a0
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| 173 | fpu_gp_save 13,$a0
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| 174 | fpu_gp_save 14,$a0
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| 175 | fpu_gp_save 15,$a0
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| 176 | fpu_gp_save 16,$a0
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| 177 | fpu_gp_save 17,$a0
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| 178 | fpu_gp_save 18,$a0
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| 179 | fpu_gp_save 19,$a0
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| 180 | fpu_gp_save 20,$a0
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| 181 | fpu_gp_save 21,$a0
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| 182 | fpu_gp_save 22,$a0
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| 183 | fpu_gp_save 23,$a0
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| 184 | fpu_gp_save 24,$a0
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| 185 | fpu_gp_save 25,$a0
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| 186 | fpu_gp_save 26,$a0
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| 187 | fpu_gp_save 27,$a0
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| 188 | fpu_gp_save 28,$a0
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| 189 | fpu_gp_save 29,$a0
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| 190 | fpu_gp_save 30,$a0
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| 191 | fpu_gp_save 31,$a0
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| 192 |
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| 193 | fpu_ct_save 1,$a0
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| 194 | fpu_ct_save 2,$a0
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| 195 | fpu_ct_save 3,$a0
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| 196 | fpu_ct_save 4,$a0
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| 197 | fpu_ct_save 5,$a0
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| 198 | fpu_ct_save 6,$a0
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| 199 | fpu_ct_save 7,$a0
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| 200 | fpu_ct_save 8,$a0
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| 201 | fpu_ct_save 9,$a0
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| 202 | fpu_ct_save 10,$a0
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| 203 | fpu_ct_save 11,$a0
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| 204 | fpu_ct_save 12,$a0
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| 205 | fpu_ct_save 13,$a0
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| 206 | fpu_ct_save 14,$a0
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| 207 | fpu_ct_save 15,$a0
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| 208 | fpu_ct_save 16,$a0
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| 209 | fpu_ct_save 17,$a0
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| 210 | fpu_ct_save 18,$a0
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| 211 | fpu_ct_save 19,$a0
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| 212 | fpu_ct_save 20,$a0
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| 213 | fpu_ct_save 21,$a0
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| 214 | fpu_ct_save 22,$a0
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| 215 | fpu_ct_save 23,$a0
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| 216 | fpu_ct_save 24,$a0
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| 217 | fpu_ct_save 25,$a0
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| 218 | fpu_ct_save 26,$a0
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| 219 | fpu_ct_save 27,$a0
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| 220 | fpu_ct_save 28,$a0
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| 221 | fpu_ct_save 29,$a0
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| 222 | fpu_ct_save 30,$a0
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| 223 | fpu_ct_save 31,$a0
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| 224 | #endif
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| 225 | j $ra
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| 226 | nop
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| 227 |
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| 228 | .global fpu_context_restore
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| 229 | fpu_context_restore:
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| 230 | #ifdef HAVE_FPU
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| 231 | fpu_gp_restore 0,$a0
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| 232 | fpu_gp_restore 1,$a0
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| 233 | fpu_gp_restore 2,$a0
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| 234 | fpu_gp_restore 3,$a0
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| 235 | fpu_gp_restore 4,$a0
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| 236 | fpu_gp_restore 5,$a0
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| 237 | fpu_gp_restore 6,$a0
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| 238 | fpu_gp_restore 7,$a0
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| 239 | fpu_gp_restore 8,$a0
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| 240 | fpu_gp_restore 9,$a0
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| 241 | fpu_gp_restore 10,$a0
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| 242 | fpu_gp_restore 11,$a0
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| 243 | fpu_gp_restore 12,$a0
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| 244 | fpu_gp_restore 13,$a0
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| 245 | fpu_gp_restore 14,$a0
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| 246 | fpu_gp_restore 15,$a0
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| 247 | fpu_gp_restore 16,$a0
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| 248 | fpu_gp_restore 17,$a0
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| 249 | fpu_gp_restore 18,$a0
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| 250 | fpu_gp_restore 19,$a0
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| 251 | fpu_gp_restore 20,$a0
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| 252 | fpu_gp_restore 21,$a0
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| 253 | fpu_gp_restore 22,$a0
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| 254 | fpu_gp_restore 23,$a0
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| 255 | fpu_gp_restore 24,$a0
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| 256 | fpu_gp_restore 25,$a0
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| 257 | fpu_gp_restore 26,$a0
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| 258 | fpu_gp_restore 27,$a0
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| 259 | fpu_gp_restore 28,$a0
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| 260 | fpu_gp_restore 29,$a0
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| 261 | fpu_gp_restore 30,$a0
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| 262 | fpu_gp_restore 31,$a0
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| 263 |
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| 264 | fpu_ct_restore 1,$a0
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| 265 | fpu_ct_restore 2,$a0
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| 266 | fpu_ct_restore 3,$a0
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| 267 | fpu_ct_restore 4,$a0
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| 268 | fpu_ct_restore 5,$a0
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| 269 | fpu_ct_restore 6,$a0
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| 270 | fpu_ct_restore 7,$a0
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| 271 | fpu_ct_restore 8,$a0
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| 272 | fpu_ct_restore 9,$a0
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| 273 | fpu_ct_restore 10,$a0
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| 274 | fpu_ct_restore 11,$a0
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| 275 | fpu_ct_restore 12,$a0
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| 276 | fpu_ct_restore 13,$a0
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| 277 | fpu_ct_restore 14,$a0
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| 278 | fpu_ct_restore 15,$a0
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| 279 | fpu_ct_restore 16,$a0
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| 280 | fpu_ct_restore 17,$a0
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| 281 | fpu_ct_restore 18,$a0
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| 282 | fpu_ct_restore 19,$a0
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| 283 | fpu_ct_restore 20,$a0
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| 284 | fpu_ct_restore 21,$a0
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| 285 | fpu_ct_restore 22,$a0
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| 286 | fpu_ct_restore 23,$a0
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| 287 | fpu_ct_restore 24,$a0
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| 288 | fpu_ct_restore 25,$a0
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| 289 | fpu_ct_restore 26,$a0
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| 290 | fpu_ct_restore 27,$a0
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| 291 | fpu_ct_restore 28,$a0
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| 292 | fpu_ct_restore 29,$a0
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| 293 | fpu_ct_restore 30,$a0
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| 294 | fpu_ct_restore 31,$a0
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| 295 | #endif
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| 296 | j $ra
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| 297 | nop
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| 298 |
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| 299 | # THIS IS USERSPACE CODE
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| 300 | .global utext
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| 301 | utext:
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| 302 | j $31
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| 303 | nop
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| 304 | utext_end:
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| 305 |
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| 306 | .data
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| 307 | .global utext_size
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| 308 | utext_size:
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| 309 | .long utext_end-utext
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| 310 |
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| 311 |
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