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| 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 | .text |
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| 30 | |||
| 31 | .global halt |
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| 1685 | decky | 32 | .global memcpy |
| 1018 | decky | 33 | .global jump_to_kernel |
| 34 | |||
| 35 | halt: |
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| 36 | b halt |
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| 37 | nop |
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| 1685 | decky | 38 | |
| 39 | memcpy: |
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| 1773 | jermar | 40 | .register %g2, #scratch |
| 41 | .register %g3, #scratch |
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| 42 | add %o1, 7, %g1 |
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| 43 | and %g1, -8, %g1 |
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| 44 | cmp %o1, %g1 |
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| 45 | be,pn %xcc, 3f |
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| 46 | add %o0, 7, %g1 |
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| 47 | mov 0, %g3 |
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| 48 | 0: |
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| 49 | brz,pn %o2, 2f |
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| 50 | mov 0, %g2 |
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| 51 | 1: |
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| 52 | ldub [%g3 + %o1], %g1 |
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| 53 | add %g2, 1, %g2 |
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| 54 | cmp %o2, %g2 |
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| 55 | stb %g1, [%g3 + %o0] |
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| 56 | bne,pt %xcc, 1b |
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| 57 | mov %g2, %g3 |
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| 58 | 2: |
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| 59 | jmp %o7 + 8 ! exit point |
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| 60 | mov %o1, %o0 |
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| 61 | 3: |
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| 62 | and %g1, -8, %g1 |
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| 63 | cmp %o0, %g1 |
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| 64 | bne,pt %xcc, 0b |
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| 65 | mov 0, %g3 |
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| 66 | srlx %o2, 3, %g4 |
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| 67 | brz,pn %g4, 5f |
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| 68 | mov 0, %g5 |
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| 69 | 4: |
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| 70 | sllx %g3, 3, %g2 |
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| 71 | add %g5, 1, %g3 |
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| 72 | ldx [%o1 + %g2], %g1 |
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| 73 | mov %g3, %g5 |
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| 74 | cmp %g4, %g3 |
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| 75 | bne,pt %xcc, 4b |
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| 76 | stx %g1, [%o0 + %g2] |
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| 77 | 5: |
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| 78 | and %o2, 7, %o2 |
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| 79 | brz,pn %o2, 2b |
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| 80 | sllx %g4, 3, %g1 |
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| 81 | mov 0, %g2 |
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| 82 | add %g1, %o0, %o0 |
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| 83 | add %g1, %o1, %g4 |
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| 84 | mov 0, %g3 |
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| 85 | 6: |
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| 86 | ldub [%g2 + %g4], %g1 |
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| 87 | stb %g1, [%g2 + %o0] |
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| 88 | add %g3, 1, %g2 |
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| 89 | cmp %o2, %g2 |
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| 90 | bne,pt %xcc, 6b |
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| 91 | mov %g2, %g3 |
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| 1685 | decky | 92 | |
| 1773 | jermar | 93 | jmp %o7 + 8 ! exit point |
| 94 | mov %o1, %o0 |
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| 95 | |||
| 1018 | decky | 96 | jump_to_kernel: |
| 1771 | jermar | 97 | b jump_to_kernel |
| 1018 | decky | 98 | nop |