| 1 | /*
|
|---|
| 2 | * Copyright (c) 2007 Michal Kebrt
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | #include <abi/asmtool.h>
|
|---|
| 30 |
|
|---|
| 31 | .text
|
|---|
| 32 |
|
|---|
| 33 | FUNCTION_BEGIN(memcpy_from_uspace)
|
|---|
| 34 | FUNCTION_BEGIN(memcpy_to_uspace)
|
|---|
| 35 | add r3, r1, #3
|
|---|
| 36 | bic r3, r3, #3
|
|---|
| 37 | cmp r1, r3
|
|---|
| 38 | stmdb sp!, {r4, r5, lr}
|
|---|
| 39 | mov r5, r0 /* save dst */
|
|---|
| 40 | beq 4f
|
|---|
| 41 |
|
|---|
| 42 | 1:
|
|---|
| 43 | cmp r2, #0
|
|---|
| 44 | movne ip, #0
|
|---|
| 45 | beq 3f
|
|---|
| 46 |
|
|---|
| 47 | 2:
|
|---|
| 48 | ldrb r3, [ip, r1]
|
|---|
| 49 | strb r3, [ip, r0]
|
|---|
| 50 | add ip, ip, #1
|
|---|
| 51 | cmp ip, r2
|
|---|
| 52 | bne 2b
|
|---|
| 53 |
|
|---|
| 54 | 3:
|
|---|
| 55 | mov r0, r5
|
|---|
| 56 | ldmia sp!, {r4, r5, pc}
|
|---|
| 57 |
|
|---|
| 58 | 4:
|
|---|
| 59 | add r3, r0, #3
|
|---|
| 60 | bic r3, r3, #3
|
|---|
| 61 | cmp r0, r3
|
|---|
| 62 | bne 1b
|
|---|
| 63 | movs r4, r2, lsr #2
|
|---|
| 64 | moveq lr, r4
|
|---|
| 65 | beq 6f
|
|---|
| 66 | mov lr, #0
|
|---|
| 67 | mov ip, lr
|
|---|
| 68 |
|
|---|
| 69 | 5:
|
|---|
| 70 | ldr r3, [ip, r1]
|
|---|
| 71 | add lr, lr, #1
|
|---|
| 72 | cmp lr, r4
|
|---|
| 73 | str r3, [ip, r0]
|
|---|
| 74 | add ip, ip, #4
|
|---|
| 75 | bne 5b
|
|---|
| 76 |
|
|---|
| 77 | 6:
|
|---|
| 78 | ands r4, r2, #3
|
|---|
| 79 | beq 3b
|
|---|
| 80 | mov r3, lr, lsl #2
|
|---|
| 81 | add r0, r3, r0
|
|---|
| 82 | add ip, r3, r1
|
|---|
| 83 | mov r2, #0
|
|---|
| 84 |
|
|---|
| 85 | 7:
|
|---|
| 86 | ldrb r3, [r2, ip]
|
|---|
| 87 | strb r3, [r2, r0]
|
|---|
| 88 | add r2, r2, #1
|
|---|
| 89 | cmp r2, r4
|
|---|
| 90 | bne 7b
|
|---|
| 91 | b 3b
|
|---|
| 92 | FUNCTION_END(memcpy_from_uspace)
|
|---|
| 93 | FUNCTION_END(memcpy_to_uspace)
|
|---|
| 94 |
|
|---|
| 95 | SYMBOL(memcpy_from_uspace_failover_address)
|
|---|
| 96 | SYMBOL(memcpy_to_uspace_failover_address)
|
|---|
| 97 | mov r0, #0
|
|---|
| 98 | ldmia sp!, {r4, r5, pc}
|
|---|
| 99 |
|
|---|
| 100 | FUNCTION_BEGIN(early_putuchar)
|
|---|
| 101 | mov pc, lr
|
|---|
| 102 | FUNCTION_END(early_putuchar)
|
|---|
