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linux-next/include/asm-arm26/cacheflush.h
Ralf Baechle ec8c0446b6 [PATCH] Optimize D-cache alias handling on fork
Virtually index, physically tagged cache architectures can get away
without cache flushing when forking.  This patch adds a new cache
flushing function flush_cache_dup_mm(struct mm_struct *) which for the
moment I've implemented to do the same thing on all architectures
except on MIPS where it's a no-op.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-13 09:27:08 -08:00

54 lines
2.0 KiB
C

/*
* linux/include/asm-arm/cacheflush.h
*
* Copyright (C) 2000-2002 Russell King
* Copyright (C) 2003 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* ARM26 cache 'functions'
*
*/
#ifndef _ASMARM_CACHEFLUSH_H
#define _ASMARM_CACHEFLUSH_H
#if 1 //FIXME - BAD INCLUDES!!!
#include <linux/sched.h>
#include <linux/mm.h>
#endif
#define flush_cache_all() do { } while (0)
#define flush_cache_mm(mm) do { } while (0)
#define flush_cache_dup_mm(mm) do { } while (0)
#define flush_cache_range(vma,start,end) do { } while (0)
#define flush_cache_page(vma,vmaddr,pfn) do { } while (0)
#define flush_cache_vmap(start, end) do { } while (0)
#define flush_cache_vunmap(start, end) do { } while (0)
#define invalidate_dcache_range(start,end) do { } while (0)
#define clean_dcache_range(start,end) do { } while (0)
#define flush_dcache_range(start,end) do { } while (0)
#define flush_dcache_page(page) do { } while (0)
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
#define clean_dcache_entry(_s) do { } while (0)
#define clean_cache_entry(_start) do { } while (0)
#define flush_icache_user_range(start,end, bob, fred) do { } while (0)
#define flush_icache_range(start,end) do { } while (0)
#define flush_icache_page(vma,page) do { } while (0)
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len)
/* DAG: ARM3 will flush cache on MEMC updates anyway? so don't bother */
/* IM : Yes, it will, but only if setup to do so (we do this). */
#define clean_cache_area(_start,_size) do { } while (0)
#endif