| 1 | #
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| 2 | # Copyright (C) 2001-2004 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 | .text
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| 30 |
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| 31 | .macro cp0_read reg
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| 32 | mfc0 $2,\reg
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| 33 | j $31
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| 34 | nop
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| 35 | .endm
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| 36 |
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| 37 | .macro cp0_write reg
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| 38 | mtc0 $4,\reg
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| 39 | j $31
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| 40 | nop
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| 41 | .endm
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| 42 |
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| 43 | .set noat
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| 44 | .set noreorder
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| 45 | .set nomacro
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| 46 |
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| 47 | .global cp0_index_read
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| 48 | .global cp0_index_write
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| 49 | .global cp0_random_read
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| 50 | .global cp0_entry_lo0_read
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| 51 | .global cp0_entry_lo0_write
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| 52 | .global cp0_entry_lo1_read
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| 53 | .global cp0_entry_lo1_write
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| 54 | .global cp0_context_read
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| 55 | .global cp0_context_write
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| 56 | .global cp0_pagemask_read
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| 57 | .global cp0_pagemask_write
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| 58 | .global cp0_wired_read
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| 59 | .global cp0_wired_write
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| 60 | .global cp0_badvaddr_read
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| 61 | .global cp0_count_read
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| 62 | .global cp0_count_write
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| 63 | .global cp0_hi_read
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| 64 | .global cp0_hi_write
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| 65 | .global cp0_compare_read
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| 66 | .global cp0_compare_write
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| 67 | .global cp0_status_read
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| 68 | .global cp0_status_write
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| 69 | .global cp0_cause_read
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| 70 | .global cp0_epc_read
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| 71 | .global cp0_epc_write
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| 72 | .global cp0_prid_read
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| 73 |
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| 74 | cp0_index_read: cp0_read $0
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| 75 | cp0_index_write: cp0_write $0
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| 76 |
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| 77 | cp0_random_read: cp0_read $1
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| 78 |
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| 79 | cp0_entry_lo0_read: cp0_read $2
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| 80 | cp0_entry_lo0_write: cp0_write $2
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| 81 |
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| 82 | cp0_entry_lo1_read: cp0_read $3
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| 83 | cp0_entry_lo1_write: cp0_write $3
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| 84 |
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| 85 | cp0_context_read: cp0_read $4
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| 86 | cp0_context_write: cp0_write $4
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| 87 |
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| 88 | cp0_pagemask_read: cp0_read $5
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| 89 | cp0_pagemask_write: cp0_write $5
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| 90 |
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| 91 | cp0_wired_read: cp0_read $6
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| 92 | cp0_wired_write: cp0_write $6
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| 93 |
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| 94 | cp0_badvaddr_read: cp0_read $8
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| 95 |
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| 96 | cp0_count_read: cp0_read $9
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| 97 | cp0_count_write: cp0_write $9
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| 98 |
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| 99 | cp0_entry_hi_read: cp0_read $10
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| 100 | cp0_entry_hi_write: cp0_write $10
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| 101 |
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| 102 | cp0_compare_read: cp0_read $11
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| 103 | cp0_compare_write: cp0_write $11
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| 104 |
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| 105 | cp0_status_read: cp0_read $12
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| 106 | cp0_status_write: cp0_write $12
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| 107 |
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| 108 | cp0_cause_read: cp0_read $13
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| 109 |
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| 110 | cp0_epc_read: cp0_read $14
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| 111 | cp0_epc_write: cp0_write $14
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| 112 |
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| 113 | cp0_prid_read: cp0_read $15
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| 114 |
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| 115 |
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| 116 | .global tlbp
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| 117 | tlbp:
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| 118 | tlbp
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| 119 | j $31
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| 120 | nop
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| 121 |
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| 122 | .global tlbr
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| 123 | tlbr:
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| 124 | tlbr
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| 125 | j $31
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| 126 | nop
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| 127 |
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| 128 | .global tlbwi
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| 129 | tlbwi:
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| 130 | tlbwi
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| 131 | j $31
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| 132 | nop
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| 133 |
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| 134 | .global tlbwr
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| 135 | tlbwr:
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| 136 | tlbwr
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| 137 | j $31
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| 138 | nop
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| 139 |
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| 140 | .global cpu_halt
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| 141 | cpu_halt:
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| 142 | j cpu_halt
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| 143 | nop
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| 144 |
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| 145 |
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| 146 | # THIS IS USERSPACE CODE
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| 147 | .global utext
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| 148 | utext:
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| 149 | j $31
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| 150 | nop
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| 151 | utext_end:
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| 152 |
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| 153 | .data
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| 154 | .global utext_size
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| 155 | utext_size:
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| 156 | .long utext_end-utext
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| 157 | |
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