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- | 1 | # |
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- | 2 | # Copyright (c) 2007 Michal Kebrt |
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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 | ||
- | 30 | .text |
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- | 31 | ||
- | 32 | .global memsetb |
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- | 33 | .global memcpy |
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- | 34 | .global memcpy_from_uspace |
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- | 35 | .global memcpy_to_uspace |
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- | 36 | .global memcpy_from_uspace_failover_address |
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- | 37 | .global memcpy_to_uspace_failover_address |
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- | 38 | ||
- | 39 | memsetb: |
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- | 40 | b _memsetb |
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- | 41 | ||
- | 42 | memcpy: |
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- | 43 | memcpy_from_uspace: |
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- | 44 | memcpy_to_uspace: |
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- | 45 | add r3, r1, #3 |
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- | 46 | bic r3, r3, #3 |
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- | 47 | cmp r1, r3 |
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- | 48 | stmdb sp!, {r4, r5, lr} |
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- | 49 | mov r5, r0 /* save dst */ |
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- | 50 | beq 4f |
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- | 51 | 1: |
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- | 52 | cmp r2, #0 |
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- | 53 | movne ip, #0 |
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- | 54 | beq 3f |
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- | 55 | 2: |
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- | 56 | ldrb r3, [ip, r1] |
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- | 57 | strb r3, [ip, r0] |
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- | 58 | add ip, ip, #1 |
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- | 59 | cmp ip, r2 |
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- | 60 | bne 2b |
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- | 61 | 3: |
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- | 62 | mov r0, r5 |
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- | 63 | ldmia sp!, {r4, r5, pc} |
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- | 64 | 4: |
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- | 65 | add r3, r0, #3 |
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- | 66 | bic r3, r3, #3 |
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- | 67 | cmp r0, r3 |
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- | 68 | bne 1b |
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- | 69 | movs r4, r2, lsr #2 |
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- | 70 | moveq lr, r4 |
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- | 71 | beq 6f |
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- | 72 | mov lr, #0 |
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- | 73 | mov ip, lr |
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- | 74 | 5: |
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- | 75 | ldr r3, [ip, r1] |
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- | 76 | add lr, lr, #1 |
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- | 77 | cmp lr, r4 |
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- | 78 | str r3, [ip, r0] |
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- | 79 | add ip, ip, #4 |
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- | 80 | bne 5b |
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- | 81 | 6: |
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- | 82 | ands r4, r2, #3 |
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- | 83 | beq 3b |
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- | 84 | mov r3, lr, lsl #2 |
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- | 85 | add r0, r3, r0 |
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- | 86 | add ip, r3, r1 |
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- | 87 | mov r2, #0 |
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- | 88 | 7: |
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- | 89 | ldrb r3, [r2, ip] |
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- | 90 | strb r3, [r2, r0] |
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- | 91 | add r2, r2, #1 |
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- | 92 | cmp r2, r4 |
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- | 93 | bne 7b |
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- | 94 | b 3b |
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- | 95 | ||
- | 96 | memcpy_from_uspace_failover_address: |
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- | 97 | memcpy_to_uspace_failover_address: |
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- | 98 | mov r0, #0 |
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- | 99 | ldmia sp!, {r4, r5, pc} |