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 | * | |
| 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. | |
| 11 | * | |
| 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 | |
| 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 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. | |
| 19 | * | |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | #include <debug.h> | |
| 23 | #include <ppc/asm.h> | |
| 24 | #include <ppc/proc_reg.h> | |
| 25 | #include <mach/ppc/vm_param.h> | |
| 26 | #include <assym.s> | |
| 27 | ||
| 28 | .set kLog2CacheLineSize, 5 | |
| 29 | .set kCacheLineSize, 32 | |
| 30 | ||
| 31 | ENTRY(kdp_flush_cache, TAG_NO_FRAME_USED) | |
| 32 | cmpi cr0,0,r4,0 /* is this zero length? */ | |
| 33 | add r4,r3,r4 /* calculate last byte + 1 */ | |
| 34 | subi r4,r4,1 /* calculate last byte */ | |
| 35 | ||
| 36 | srwi r5,r3,kLog2CacheLineSize /* calc first cache line index */ | |
| 37 | srwi r4,r4,kLog2CacheLineSize /* calc last cache line index */ | |
| 38 | beq cr0, LdataToCodeDone /* done if zero length */ | |
| 39 | ||
| 40 | subf r4,r5,r4 /* calc diff (# lines minus 1) */ | |
| 41 | addi r4,r4,1 /* # of cache lines to flush */ | |
| 42 | slwi r5,r5,kLog2CacheLineSize /* calc addr of first cache line */ | |
| 43 | ||
| 44 | /* flush the data cache lines */ | |
| 45 | mr r3,r5 /* starting address for loop */ | |
| 46 | mtctr r4 /* loop count */ | |
| 47 | LdataToCodeFlushLoop: | |
| 48 | dcbf 0, r3 /* flush the data cache line */ | |
| 49 | addi r3,r3,kCacheLineSize /* advance to next cache line */ | |
| 50 | bdnz LdataToCodeFlushLoop /* loop until count is zero */ | |
| 51 | sync /* wait until RAM is valid */ | |
| 52 | ||
| 53 | /* invalidate the code cache lines */ | |
| 54 | mr r3,r5 /* starting address for loop */ | |
| 55 | mtctr r4 /* loop count */ | |
| 56 | LdataToCodeInvalidateLoop: | |
| 57 | icbi 0, r3 /* invalidate code cache line */ | |
| 58 | addi r3,r3,kCacheLineSize /* advance to next cache line */ | |
| 59 | bdnz LdataToCodeInvalidateLoop /* loop until count is zero */ | |
| 60 | sync /* wait until last icbi completes */ | |
| 61 | isync /* discard prefetched instructions */ | |
| 62 | LdataToCodeDone: | |
| 63 | blr /* return nothing */ | |
| 64 | ||
| 65 | ENTRY(kdp_sync_cache, TAG_NO_FRAME_USED) | |
| 66 | sync /* data sync */ | |
| 67 | isync /* inst sync */ | |
| 68 | blr /* return nothing */ | |
| 69 | ||
| 70 | ENTRY(kdp_xlate_off, TAG_NO_FRAME_USED) | |
| 71 | mfmsr r3 | |
| 9bccf70c A |
72 | rlwinm r3,r3,0,MSR_FP_BIT+1,MSR_FP_BIT-1 ; Force floating point off |
| 73 | rlwinm r3,r3,0,MSR_VEC_BIT+1,MSR_VEC_BIT-1 ; Force vectors off | |
| 1c79356b A |
74 | rlwinm r4, r3, 0, MSR_DR_BIT+1, MSR_IR_BIT-1 |
| 75 | mtmsr r4 | |
| 76 | isync | |
| 77 | blr | |
| 78 | ||
| 79 | ENTRY(kdp_xlate_restore, TAG_NO_FRAME_USED) | |
| 80 | mtmsr r3 | |
| 81 | isync | |
| 82 | blr | |
| 83 |