projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * vDSO provided cache flush routines | |
| 3 | * | |
| 4 | * Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org), | |
| 5 | * IBM Corp. | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU General Public License | |
| 9 | * as published by the Free Software Foundation; either version | |
| 10 | * 2 of the License, or (at your option) any later version. | |
| 11 | */ | |
| 1da177e4 LT |
12 | #include <asm/processor.h> |
| 13 | #include <asm/ppc_asm.h> | |
| 14 | #include <asm/vdso.h> | |
| 0013a854 | 15 | #include <asm/asm-offsets.h> |
| 1da177e4 LT |
16 | |
| 17 | .text | |
| 18 | ||
| 19 | /* | |
| 20 | * Default "generic" version of __kernel_sync_dicache. | |
| 21 | * | |
| 22 | * void __kernel_sync_dicache(unsigned long start, unsigned long end) | |
| 23 | * | |
| 24 | * Flushes the data cache & invalidate the instruction cache for the | |
| 25 | * provided range [start, end[ | |
| 1da177e4 LT |
26 | */ |
| 27 | V_FUNCTION_BEGIN(__kernel_sync_dicache) | |
| 28 | .cfi_startproc | |
| fbe48175 OJ |
29 | mflr r12 |
| 30 | .cfi_register lr,r12 | |
| 31 | mr r11,r3 | |
| 32 | bl V_LOCAL_FUNC(__get_datapage) | |
| 33 | mtlr r12 | |
| 34 | mr r10,r3 | |
| 35 | ||
| 36 | lwz r7,CFG_DCACHE_BLOCKSZ(r10) | |
| 37 | addi r5,r7,-1 | |
| 38 | andc r6,r11,r5 /* round low to line bdy */ | |
| 1da177e4 LT |
39 | subf r8,r6,r4 /* compute length */ |
| 40 | add r8,r8,r5 /* ensure we get enough */ | |
| fbe48175 OJ |
41 | lwz r9,CFG_DCACHE_LOGBLOCKSZ(r10) |
| 42 | srw. r8,r8,r9 /* compute line count */ | |
| 5d66da3d | 43 | crclr cr0*4+so |
| 1da177e4 LT |
44 | beqlr /* nothing to do? */ |
| 45 | mtctr r8 | |
| fbe48175 OJ |
46 | 1: dcbst 0,r6 |
| 47 | add r6,r6,r7 | |
| 1da177e4 LT |
48 | bdnz 1b |
| 49 | sync | |
| fbe48175 OJ |
50 | |
| 51 | /* Now invalidate the instruction cache */ | |
| 52 | ||
| 53 | lwz r7,CFG_ICACHE_BLOCKSZ(r10) | |
| 54 | addi r5,r7,-1 | |
| 55 | andc r6,r11,r5 /* round low to line bdy */ | |
| 56 | subf r8,r6,r4 /* compute length */ | |
| 57 | add r8,r8,r5 | |
| 58 | lwz r9,CFG_ICACHE_LOGBLOCKSZ(r10) | |
| 59 | srw. r8,r8,r9 /* compute line count */ | |
| 60 | crclr cr0*4+so | |
| 61 | beqlr /* nothing to do? */ | |
| 1da177e4 | 62 | mtctr r8 |
| fbe48175 OJ |
63 | 2: icbi 0,r6 |
| 64 | add r6,r6,r7 | |
| 65 | bdnz 2b | |
| 1da177e4 | 66 | isync |
| bdceb6a0 | 67 | li r3,0 |
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68 | blr |
| 69 | .cfi_endproc | |
| 70 | V_FUNCTION_END(__kernel_sync_dicache) | |
| 71 | ||
| 72 | ||
| 73 | /* | |
| 74 | * POWER5 version of __kernel_sync_dicache | |
| 75 | */ | |
| 76 | V_FUNCTION_BEGIN(__kernel_sync_dicache_p5) | |
| 77 | .cfi_startproc | |
| 5d66da3d | 78 | crclr cr0*4+so |
| 1da177e4 LT |
79 | sync |
| 80 | isync | |
| bdceb6a0 | 81 | li r3,0 |
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82 | blr |
| 83 | .cfi_endproc | |
| 84 | V_FUNCTION_END(__kernel_sync_dicache_p5) |