kernel-ark/include/asm-frv/cacheflush.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

92 lines
2.6 KiB
C

/* cacheflush.h: FRV cache flushing routines
*
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* 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.
*/
#ifndef _ASM_CACHEFLUSH_H
#define _ASM_CACHEFLUSH_H
/* Keep includes the same across arches. */
#include <linux/mm.h>
/*
* virtually-indexed cache management (our cache is physically indexed)
*/
#define flush_cache_all() do {} while(0)
#define flush_cache_mm(mm) do {} while(0)
#define flush_cache_range(mm, 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 flush_dcache_mmap_lock(mapping) do {} while(0)
#define flush_dcache_mmap_unlock(mapping) do {} while(0)
/*
* physically-indexed cache managment
* - see arch/frv/lib/cache.S
*/
extern void frv_dcache_writeback(unsigned long start, unsigned long size);
extern void frv_cache_invalidate(unsigned long start, unsigned long size);
extern void frv_icache_invalidate(unsigned long start, unsigned long size);
extern void frv_cache_wback_inv(unsigned long start, unsigned long size);
static inline void __flush_cache_all(void)
{
asm volatile(" dcef @(gr0,gr0),#1 \n"
" icei @(gr0,gr0),#1 \n"
" membar \n"
: : : "memory"
);
}
/* dcache/icache coherency... */
#ifdef CONFIG_MMU
extern void flush_dcache_page(struct page *page);
#else
static inline void flush_dcache_page(struct page *page)
{
unsigned long addr = page_to_phys(page);
frv_dcache_writeback(addr, addr + PAGE_SIZE);
}
#endif
static inline void flush_page_to_ram(struct page *page)
{
flush_dcache_page(page);
}
static inline void flush_icache(void)
{
__flush_cache_all();
}
static inline void flush_icache_range(unsigned long start, unsigned long end)
{
frv_cache_wback_inv(start, end);
}
#ifdef CONFIG_MMU
extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
unsigned long start, unsigned long len);
#else
static inline void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
unsigned long start, unsigned long len)
{
frv_cache_wback_inv(start, start + len);
}
#endif
static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page)
{
flush_icache_user_range(vma, page, page_to_phys(page), PAGE_SIZE);
}
#endif /* _ASM_CACHEFLUSH_H */