projects / mirror_ubuntu-focal-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 1da177e4 LT |
2 | /* |
| 3 | * vDSO provided cache flush routines | |
| 4 | * | |
| 5 | * Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org), | |
| 6 | * IBM Corp. | |
| 1da177e4 | 7 | */ |
| 1da177e4 LT |
8 | #include <asm/processor.h> |
| 9 | #include <asm/ppc_asm.h> | |
| 10 | #include <asm/vdso.h> | |
| 0013a854 | 11 | #include <asm/asm-offsets.h> |
| 1da177e4 LT |
12 | |
| 13 | .text | |
| 14 | ||
| 15 | /* | |
| 16 | * Default "generic" version of __kernel_sync_dicache. | |
| 17 | * | |
| 18 | * void __kernel_sync_dicache(unsigned long start, unsigned long end) | |
| 19 | * | |
| 20 | * Flushes the data cache & invalidate the instruction cache for the | |
| 21 | * provided range [start, end[ | |
| 1da177e4 LT |
22 | */ |
| 23 | V_FUNCTION_BEGIN(__kernel_sync_dicache) | |
| 24 | .cfi_startproc | |
| fbe48175 OJ |
25 | mflr r12 |
| 26 | .cfi_register lr,r12 | |
| 27 | mr r11,r3 | |
| 28 | bl __get_datapage@local | |
| 29 | mtlr r12 | |
| 30 | mr r10,r3 | |
| 31 | ||
| 32 | lwz r7,CFG_DCACHE_BLOCKSZ(r10) | |
| 33 | addi r5,r7,-1 | |
| 34 | andc r6,r11,r5 /* round low to line bdy */ | |
| 1da177e4 LT |
35 | subf r8,r6,r4 /* compute length */ |
| 36 | add r8,r8,r5 /* ensure we get enough */ | |
| fbe48175 OJ |
37 | lwz r9,CFG_DCACHE_LOGBLOCKSZ(r10) |
| 38 | srw. r8,r8,r9 /* compute line count */ | |
| 5d66da3d | 39 | crclr cr0*4+so |
| 1da177e4 LT |
40 | beqlr /* nothing to do? */ |
| 41 | mtctr r8 | |
| fbe48175 OJ |
42 | 1: dcbst 0,r6 |
| 43 | add r6,r6,r7 | |
| 1da177e4 LT |
44 | bdnz 1b |
| 45 | sync | |
| fbe48175 OJ |
46 | |
| 47 | /* Now invalidate the instruction cache */ | |
| 48 | ||
| 49 | lwz r7,CFG_ICACHE_BLOCKSZ(r10) | |
| 50 | addi r5,r7,-1 | |
| 51 | andc r6,r11,r5 /* round low to line bdy */ | |
| 52 | subf r8,r6,r4 /* compute length */ | |
| 53 | add r8,r8,r5 | |
| 54 | lwz r9,CFG_ICACHE_LOGBLOCKSZ(r10) | |
| 55 | srw. r8,r8,r9 /* compute line count */ | |
| 56 | crclr cr0*4+so | |
| 57 | beqlr /* nothing to do? */ | |
| 1da177e4 | 58 | mtctr r8 |
| fbe48175 OJ |
59 | 2: icbi 0,r6 |
| 60 | add r6,r6,r7 | |
| 61 | bdnz 2b | |
| 1da177e4 | 62 | isync |
| bdceb6a0 | 63 | li r3,0 |
| 1da177e4 LT |
64 | blr |
| 65 | .cfi_endproc | |
| 66 | V_FUNCTION_END(__kernel_sync_dicache) | |
| 67 | ||
| 68 | ||
| 69 | /* | |
| 70 | * POWER5 version of __kernel_sync_dicache | |
| 71 | */ | |
| 72 | V_FUNCTION_BEGIN(__kernel_sync_dicache_p5) | |
| 73 | .cfi_startproc | |
| 5d66da3d | 74 | crclr cr0*4+so |
| 1da177e4 LT |
75 | sync |
| 76 | isync | |
| bdceb6a0 | 77 | li r3,0 |
| 1da177e4 LT |
78 | blr |
| 79 | .cfi_endproc | |
| 80 | V_FUNCTION_END(__kernel_sync_dicache_p5) | |
| 81 |