projects / GitHub / mt8127 / android_kernel_alcatel_ttab.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[ | |
| 26 | * | |
| 27 | * Note: all CPUs supported by this kernel have a 128 bytes cache | |
| 28 | * line size so we don't have to peek that info from the datapage | |
| 29 | */ | |
| 30 | V_FUNCTION_BEGIN(__kernel_sync_dicache) | |
| 31 | .cfi_startproc | |
| 32 | li r5,127 | |
| 33 | andc r6,r3,r5 /* round low to line bdy */ | |
| 34 | subf r8,r6,r4 /* compute length */ | |
| 35 | add r8,r8,r5 /* ensure we get enough */ | |
| 36 | srwi. r8,r8,7 /* compute line count */ | |
| 5d66da3d | 37 | crclr cr0*4+so |
| 1da177e4 LT |
38 | beqlr /* nothing to do? */ |
| 39 | mtctr r8 | |
| 40 | mr r3,r6 | |
| 41 | 1: dcbst 0,r3 | |
| 42 | addi r3,r3,128 | |
| 43 | bdnz 1b | |
| 44 | sync | |
| 45 | mtctr r8 | |
| 46 | 1: icbi 0,r6 | |
| 47 | addi r6,r6,128 | |
| 48 | bdnz 1b | |
| 49 | isync | |
| bdceb6a0 | 50 | li r3,0 |
| 1da177e4 LT |
51 | blr |
| 52 | .cfi_endproc | |
| 53 | V_FUNCTION_END(__kernel_sync_dicache) | |
| 54 | ||
| 55 | ||
| 56 | /* | |
| 57 | * POWER5 version of __kernel_sync_dicache | |
| 58 | */ | |
| 59 | V_FUNCTION_BEGIN(__kernel_sync_dicache_p5) | |
| 60 | .cfi_startproc | |
| 5d66da3d | 61 | crclr cr0*4+so |
| 1da177e4 LT |
62 | sync |
| 63 | isync | |
| bdceb6a0 | 64 | li r3,0 |
| 1da177e4 LT |
65 | blr |
| 66 | .cfi_endproc | |
| 67 | V_FUNCTION_END(__kernel_sync_dicache_p5) |