Rev 1018 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1018 | decky | 1 | # |
| 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 | |||
| 29 | #include "regname.h" |
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| 30 | |||
| 31 | .set noat |
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| 32 | .set noreorder |
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| 33 | .set nomacro |
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| 34 | |||
| 35 | .text |
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| 36 | |||
| 37 | .global halt |
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| 1685 | decky | 38 | .global memcpy |
| 1018 | decky | 39 | .global jump_to_kernel |
| 40 | |||
| 41 | halt: |
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| 42 | b halt |
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| 43 | nop |
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| 1685 | decky | 44 | |
| 45 | memcpy: |
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| 46 | addiu $v0,$a1,3 |
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| 47 | li $v1,-4 # 0xfffffffffffffffc |
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| 48 | and $v0,$v0,$v1 |
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| 49 | beq $a1,$v0,3f |
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| 50 | move $t0,$a0 |
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| 1018 | decky | 51 | |
| 1685 | decky | 52 | 0: |
| 53 | beq $a2,$zero,2f |
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| 54 | move $a3,$zero |
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| 55 | |||
| 56 | 1: |
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| 57 | addu $v0,$a1,$a3 |
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| 58 | lbu $a0,0($v0) |
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| 59 | addu $v1,$t0,$a3 |
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| 60 | addiu $a3,$a3,1 |
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| 61 | bne $a3,$a2,1b |
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| 62 | sb $a0,0($v1) |
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| 63 | |||
| 64 | 2: |
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| 65 | jr $ra |
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| 66 | move $v0,$a1 |
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| 67 | |||
| 68 | 3: |
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| 69 | addiu $v0,$a0,3 |
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| 70 | and $v0,$v0,$v1 |
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| 71 | bne $a0,$v0,0b |
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| 72 | srl $t1,$a2,2 |
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| 73 | |||
| 74 | beq $t1,$zero,5f |
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| 75 | move $a3,$zero |
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| 76 | |||
| 77 | move $a3,$zero |
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| 78 | move $a0,$zero |
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| 79 | 4: |
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| 80 | addu $v0,$a1,$a0 |
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| 81 | lw $v1,0($v0) |
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| 82 | addiu $a3,$a3,1 |
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| 83 | addu $v0,$t0,$a0 |
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| 84 | sw $v1,0($v0) |
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| 85 | bne $a3,$t1,4b |
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| 86 | addiu $a0,$a0,4 |
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| 87 | |||
| 88 | 5: |
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| 89 | andi $a2,$a2,0x3 |
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| 90 | beq $a2,$zero,2b |
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| 91 | nop |
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| 92 | |||
| 93 | sll $v0,$a3,2 |
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| 94 | addu $t1,$v0,$t0 |
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| 95 | move $a3,$zero |
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| 96 | addu $t0,$v0,$a1 |
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| 97 | 6: |
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| 98 | addu $v0,$t0,$a3 |
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| 99 | lbu $a0,0($v0) |
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| 100 | addu $v1,$t1,$a3 |
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| 101 | addiu $a3,$a3,1 |
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| 102 | bne $a3,$a2,6b |
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| 103 | sb $a0,0($v1) |
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| 104 | |||
| 105 | jr $ra |
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| 106 | move $v0,$a1 |
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| 107 | |||
| 1018 | decky | 108 | jump_to_kernel: |
| 109 | # .word 0x39 |
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| 110 | j $a0 |
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| 111 | nop |