projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 37839358 A |
6 | * The contents of this file constitute Original Code as defined in and |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the | |
| 8 | * "License"). You may not use this file except in compliance with the | |
| 9 | * License. Please obtain a copy of the License at | |
| 10 | * http://www.apple.com/publicsource and read it before using this file. | |
| 1c79356b | 11 | * |
| 37839358 A |
12 | * This Original Code and all software distributed under the License are |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 1c79356b A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 37839358 A |
16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| 17 | * License for the specific language governing rights and limitations | |
| 18 | * under the License. | |
| 1c79356b A |
19 | * |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | /* | |
| 23 | * @OSF_COPYRIGHT@ | |
| 24 | */ | |
| 25 | ||
| 26 | #include <debug.h> | |
| 27 | #include <ppc/asm.h> | |
| 28 | #include <ppc/proc_reg.h> | |
| 29 | #include <mach/ppc/vm_param.h> | |
| 30 | #include <assym.s> | |
| 31 | ||
| 1c79356b A |
32 | |
| 33 | /* void | |
| 34 | * db_phys_cmp(src_a, src_b, bytecount) | |
| 35 | * vm_offset_t src_a; | |
| 36 | * vm_offset_t src_b; | |
| 37 | * int bytecount | |
| 38 | * | |
| 39 | * This routine will compare bytecount bytes from physical address src_a and physical | |
| 40 | * address src_b. | |
| 41 | */ | |
| 42 | ||
| 55e303ae A |
43 | #warning THIS IS BROKEN FOR 64-BIT |
| 44 | ||
| 1c79356b | 45 | /* Switch off data translations */ |
| 55e303ae A |
46 | lis r7,hi16(MASK(MSR_VEC)) |
| 47 | ori r7,r7,lo16(MASK(MSR_FP)) | |
| 1c79356b | 48 | mfmsr r6 |
| 55e303ae A |
49 | andc r6,r6,r7 ; Force FP and vec off |
| 50 | ori r7,r7,lo16(MASK(MSR_DR)) ; Set the DR bit | |
| 51 | andc r7,r6,r7 ; Force DR off | |
| 1c79356b A |
52 | mtmsr r7 |
| 53 | isync /* Ensure data translations are off */ | |
| 54 | ||
| 55 | subi r3, r3, 4 | |
| 56 | subi r4, r4, 4 | |
| 57 | ||
| 58 | cmpwi r5, 3 | |
| 59 | ble- .L_db_phys_cmp_bytes | |
| 60 | .L_db_phys_cmp_loop: | |
| 61 | lwz r0, 4(r3) | |
| 62 | lwz r7, 4(r4) | |
| 63 | addi r3, r3, 4 | |
| 64 | addi r4, r4, 4 | |
| 65 | subi r5, r5, 4 | |
| 66 | cmpw r0, r7 | |
| 67 | bne .L_db_phys_cmp_false | |
| 68 | cmpwi r5, 3 | |
| 69 | bgt+ .L_db_phys_cmp_loop | |
| 70 | ||
| 71 | /* If no leftover bytes, we're done now */ | |
| 72 | cmpwi r5, 0 | |
| 73 | beq+ .L_db_phys_cmp_true | |
| 74 | ||
| 75 | .L_db_phys_cmp_bytes: | |
| 76 | addi r3, r3, 3 | |
| 77 | addi r4, r4, 3 | |
| 78 | .L_db_phys_cmp_byte_loop: | |
| 79 | lbz r0, 1(r3) | |
| 80 | lbz r7, 1(r4) | |
| 81 | addi r3, r3, 1 | |
| 82 | addi r4, r4, 1 | |
| 83 | subi r5, r5, 1 | |
| 84 | cmpw r0, r7 | |
| 85 | bne .L_db_phys_cmp_false | |
| 86 | cmpwi r5, 0 | |
| 87 | bne+ .L_db_phys_cmp_loop | |
| 88 | ||
| 89 | .L_db_phys_cmp_true: | |
| 90 | li r3, 1 | |
| 91 | b .L_db_phys_cmp_done | |
| 92 | ||
| 93 | .L_db_phys_cmp_false: | |
| 94 | li r3, 0 | |
| 95 | ||
| 96 | .L_db_phys_cmp_done: | |
| 97 | mtmsr r6 /* Restore original translations */ | |
| 98 | isync /* Ensure data translations are off */ | |
| 99 | ||
| 100 | blr | |
| 101 |