projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 8ad349bb | 4 | * @APPLE_LICENSE_OSREFERENCE_HEADER_START@ |
| 1c79356b | 5 | * |
| 8ad349bb A |
6 | * This file contains Original Code and/or Modifications of Original Code |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. The rights granted to you under the | |
| 10 | * License may not be used to create, or enable the creation or | |
| 11 | * redistribution of, unlawful or unlicensed copies of an Apple operating | |
| 12 | * system, or to circumvent, violate, or enable the circumvention or | |
| 13 | * violation of, any terms of an Apple operating system software license | |
| 14 | * agreement. | |
| 15 | * | |
| 16 | * Please obtain a copy of the License at | |
| 17 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 18 | * file. | |
| 19 | * | |
| 20 | * The Original Code and all software distributed under the License are | |
| 21 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 22 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 23 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 24 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 25 | * Please see the License for the specific language governing rights and | |
| 26 | * limitations under the License. | |
| 27 | * | |
| 28 | * @APPLE_LICENSE_OSREFERENCE_HEADER_END@ | |
| 1c79356b A |
29 | */ |
| 30 | /* | |
| 31 | * @OSF_COPYRIGHT@ | |
| 32 | */ | |
| 33 | ||
| 34 | #include <debug.h> | |
| 35 | #include <ppc/asm.h> | |
| 36 | #include <ppc/proc_reg.h> | |
| 37 | #include <mach/ppc/vm_param.h> | |
| 38 | #include <assym.s> | |
| 39 | ||
| 1c79356b A |
40 | |
| 41 | /* void | |
| 42 | * db_phys_cmp(src_a, src_b, bytecount) | |
| 43 | * vm_offset_t src_a; | |
| 44 | * vm_offset_t src_b; | |
| 45 | * int bytecount | |
| 46 | * | |
| 47 | * This routine will compare bytecount bytes from physical address src_a and physical | |
| 48 | * address src_b. | |
| 49 | */ | |
| 50 | ||
| 55e303ae A |
51 | #warning THIS IS BROKEN FOR 64-BIT |
| 52 | ||
| 1c79356b | 53 | /* Switch off data translations */ |
| 55e303ae A |
54 | lis r7,hi16(MASK(MSR_VEC)) |
| 55 | ori r7,r7,lo16(MASK(MSR_FP)) | |
| 1c79356b | 56 | mfmsr r6 |
| 55e303ae A |
57 | andc r6,r6,r7 ; Force FP and vec off |
| 58 | ori r7,r7,lo16(MASK(MSR_DR)) ; Set the DR bit | |
| 59 | andc r7,r6,r7 ; Force DR off | |
| 1c79356b A |
60 | mtmsr r7 |
| 61 | isync /* Ensure data translations are off */ | |
| 62 | ||
| 63 | subi r3, r3, 4 | |
| 64 | subi r4, r4, 4 | |
| 65 | ||
| 66 | cmpwi r5, 3 | |
| 67 | ble- .L_db_phys_cmp_bytes | |
| 68 | .L_db_phys_cmp_loop: | |
| 69 | lwz r0, 4(r3) | |
| 70 | lwz r7, 4(r4) | |
| 71 | addi r3, r3, 4 | |
| 72 | addi r4, r4, 4 | |
| 73 | subi r5, r5, 4 | |
| 74 | cmpw r0, r7 | |
| 75 | bne .L_db_phys_cmp_false | |
| 76 | cmpwi r5, 3 | |
| 77 | bgt+ .L_db_phys_cmp_loop | |
| 78 | ||
| 79 | /* If no leftover bytes, we're done now */ | |
| 80 | cmpwi r5, 0 | |
| 81 | beq+ .L_db_phys_cmp_true | |
| 82 | ||
| 83 | .L_db_phys_cmp_bytes: | |
| 84 | addi r3, r3, 3 | |
| 85 | addi r4, r4, 3 | |
| 86 | .L_db_phys_cmp_byte_loop: | |
| 87 | lbz r0, 1(r3) | |
| 88 | lbz r7, 1(r4) | |
| 89 | addi r3, r3, 1 | |
| 90 | addi r4, r4, 1 | |
| 91 | subi r5, r5, 1 | |
| 92 | cmpw r0, r7 | |
| 93 | bne .L_db_phys_cmp_false | |
| 94 | cmpwi r5, 0 | |
| 95 | bne+ .L_db_phys_cmp_loop | |
| 96 | ||
| 97 | .L_db_phys_cmp_true: | |
| 98 | li r3, 1 | |
| 99 | b .L_db_phys_cmp_done | |
| 100 | ||
| 101 | .L_db_phys_cmp_false: | |
| 102 | li r3, 0 | |
| 103 | ||
| 104 | .L_db_phys_cmp_done: | |
| 105 | mtmsr r6 /* Restore original translations */ | |
| 106 | isync /* Ensure data translations are off */ | |
| 107 | ||
| 108 | blr | |
| 109 |