diff options
Diffstat (limited to 'arch/um/sys-ppc/misc.S')
| -rw-r--r-- | arch/um/sys-ppc/misc.S | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/arch/um/sys-ppc/misc.S b/arch/um/sys-ppc/misc.S deleted file mode 100644 index 1364b7da578c..000000000000 --- a/arch/um/sys-ppc/misc.S +++ /dev/null @@ -1,111 +0,0 @@ -/* - * This file contains miscellaneous low-level functions. - * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) - * - * Largely rewritten by Cort Dougan (cort@cs.nmt.edu) - * and Paul Mackerras. - * - * A couple of functions stolen from arch/ppc/kernel/misc.S for UML - * by Chris Emerson. - * - * 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 <asm/processor.h> -#include "ppc_asm.h" - -#if defined(CONFIG_4xx) || defined(CONFIG_8xx) -#define CACHE_LINE_SIZE 16 -#define LG_CACHE_LINE_SIZE 4 -#define MAX_COPY_PREFETCH 1 -#else -#define CACHE_LINE_SIZE 32 -#define LG_CACHE_LINE_SIZE 5 -#define MAX_COPY_PREFETCH 4 -#endif /* CONFIG_4xx || CONFIG_8xx */ - - .text - -/* - * Clear a page using the dcbz instruction, which doesn't cause any - * memory traffic (except to write out any cache lines which get - * displaced). This only works on cacheable memory. - */ -_GLOBAL(clear_page) - li r0,4096/CACHE_LINE_SIZE - mtctr r0 -#ifdef CONFIG_8xx - li r4, 0 -1: stw r4, 0(r3) - stw r4, 4(r3) - stw r4, 8(r3) - stw r4, 12(r3) -#else -1: dcbz 0,r3 -#endif - addi r3,r3,CACHE_LINE_SIZE - bdnz 1b - blr - -/* - * Copy a whole page. We use the dcbz instruction on the destination - * to reduce memory traffic (it eliminates the unnecessary reads of - * the destination into cache). This requires that the destination - * is cacheable. - */ -#define COPY_16_BYTES \ - lwz r6,4(r4); \ - lwz r7,8(r4); \ - lwz r8,12(r4); \ - lwzu r9,16(r4); \ - stw r6,4(r3); \ - stw r7,8(r3); \ - stw r8,12(r3); \ - stwu r9,16(r3) - -_GLOBAL(copy_page) - addi r3,r3,-4 - addi r4,r4,-4 - li r5,4 - -#ifndef CONFIG_8xx -#if MAX_COPY_PREFETCH > 1 - li r0,MAX_COPY_PREFETCH - li r11,4 - mtctr r0 -11: dcbt r11,r4 - addi r11,r11,CACHE_LINE_SIZE - bdnz 11b -#else /* MAX_COPY_PREFETCH == 1 */ - dcbt r5,r4 - li r11,CACHE_LINE_SIZE+4 -#endif /* MAX_COPY_PREFETCH */ -#endif /* CONFIG_8xx */ - - li r0,4096/CACHE_LINE_SIZE - mtctr r0 -1: -#ifndef CONFIG_8xx - dcbt r11,r4 - dcbz r5,r3 -#endif - COPY_16_BYTES -#if CACHE_LINE_SIZE >= 32 - COPY_16_BYTES -#if CACHE_LINE_SIZE >= 64 - COPY_16_BYTES - COPY_16_BYTES -#if CACHE_LINE_SIZE >= 128 - COPY_16_BYTES - COPY_16_BYTES - COPY_16_BYTES - COPY_16_BYTES -#endif -#endif -#endif - bdnz 1b - blr |