| /* |
| * vDSO provided cache flush routines |
| * |
| * Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org), |
| * IBM Corp. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| #include <linux/config.h> |
| #include <asm/processor.h> |
| #include <asm/ppc_asm.h> |
| #include <asm/vdso.h> |
| #include <asm/asm-offsets.h> |
| |
| .text |
| |
| /* |
| * Default "generic" version of __kernel_sync_dicache. |
| * |
| * void __kernel_sync_dicache(unsigned long start, unsigned long end) |
| * |
| * Flushes the data cache & invalidate the instruction cache for the |
| * provided range [start, end[ |
| * |
| * Note: all CPUs supported by this kernel have a 128 bytes cache |
| * line size so we don't have to peek that info from the datapage |
| */ |
| V_FUNCTION_BEGIN(__kernel_sync_dicache) |
| .cfi_startproc |
| li r5,127 |
| andc r6,r3,r5 /* round low to line bdy */ |
| subf r8,r6,r4 /* compute length */ |
| add r8,r8,r5 /* ensure we get enough */ |
| srwi. r8,r8,7 /* compute line count */ |
| beqlr /* nothing to do? */ |
| mtctr r8 |
| mr r3,r6 |
| 1: dcbst 0,r3 |
| addi r3,r3,128 |
| bdnz 1b |
| sync |
| mtctr r8 |
| 1: icbi 0,r6 |
| addi r6,r6,128 |
| bdnz 1b |
| isync |
| li r3,0 |
| blr |
| .cfi_endproc |
| V_FUNCTION_END(__kernel_sync_dicache) |
| |
| |
| /* |
| * POWER5 version of __kernel_sync_dicache |
| */ |
| V_FUNCTION_BEGIN(__kernel_sync_dicache_p5) |
| .cfi_startproc |
| sync |
| isync |
| li r3,0 |
| blr |
| .cfi_endproc |
| V_FUNCTION_END(__kernel_sync_dicache_p5) |
| |
