mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 16:07:39 +00:00
9a8fd55899
The attached patches provides part 6 of an architecture implementation for the Tensilica Xtensa CPU series. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/*
|
|
* include/asm-xtensa/cacheflush.h
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* (C) 2001 - 2005 Tensilica Inc.
|
|
*/
|
|
|
|
#ifndef _XTENSA_CACHEFLUSH_H
|
|
#define _XTENSA_CACHEFLUSH_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/mm.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/page.h>
|
|
|
|
/*
|
|
* flush and invalidate data cache, invalidate instruction cache:
|
|
*
|
|
* __flush_invalidate_cache_all()
|
|
* __flush_invalidate_cache_range(from,sze)
|
|
*
|
|
* invalidate data or instruction cache:
|
|
*
|
|
* __invalidate_icache_all()
|
|
* __invalidate_icache_page(adr)
|
|
* __invalidate_dcache_page(adr)
|
|
* __invalidate_icache_range(from,size)
|
|
* __invalidate_dcache_range(from,size)
|
|
*
|
|
* flush data cache:
|
|
*
|
|
* __flush_dcache_page(adr)
|
|
*
|
|
* flush and invalidate data cache:
|
|
*
|
|
* __flush_invalidate_dcache_all()
|
|
* __flush_invalidate_dcache_page(adr)
|
|
* __flush_invalidate_dcache_range(from,size)
|
|
*/
|
|
|
|
extern void __flush_invalidate_cache_all(void);
|
|
extern void __flush_invalidate_cache_range(unsigned long, unsigned long);
|
|
extern void __flush_invalidate_dcache_all(void);
|
|
extern void __invalidate_icache_all(void);
|
|
|
|
extern void __invalidate_dcache_page(unsigned long);
|
|
extern void __invalidate_icache_page(unsigned long);
|
|
extern void __invalidate_icache_range(unsigned long, unsigned long);
|
|
extern void __invalidate_dcache_range(unsigned long, unsigned long);
|
|
|
|
#if XCHAL_DCACHE_IS_WRITEBACK
|
|
extern void __flush_dcache_page(unsigned long);
|
|
extern void __flush_invalidate_dcache_page(unsigned long);
|
|
extern void __flush_invalidate_dcache_range(unsigned long, unsigned long);
|
|
#else
|
|
# define __flush_dcache_page(p) do { } while(0)
|
|
# define __flush_invalidate_dcache_page(p) do { } while(0)
|
|
# define __flush_invalidate_dcache_range(p,s) do { } while(0)
|
|
#endif
|
|
|
|
/*
|
|
* We have physically tagged caches - nothing to do here -
|
|
* unless we have cache aliasing.
|
|
*
|
|
* Pages can get remapped. Because this might change the 'color' of that page,
|
|
* we have to flush the cache before the PTE is changed.
|
|
* (see also Documentation/cachetlb.txt)
|
|
*/
|
|
|
|
#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
|
|
|
|
#define flush_cache_all() __flush_invalidate_cache_all();
|
|
#define flush_cache_mm(mm) __flush_invalidate_cache_all();
|
|
|
|
#define flush_cache_vmap(start,end) __flush_invalidate_cache_all();
|
|
#define flush_cache_vunmap(start,end) __flush_invalidate_cache_all();
|
|
|
|
extern void flush_dcache_page(struct page*);
|
|
|
|
extern void flush_cache_range(struct vm_area_struct*, ulong, ulong);
|
|
extern void flush_cache_page(struct vm_area_struct*, unsigned long, unsigned long);
|
|
|
|
#else
|
|
|
|
#define flush_cache_all() do { } while (0)
|
|
#define flush_cache_mm(mm) do { } while (0)
|
|
|
|
#define flush_cache_vmap(start,end) do { } while (0)
|
|
#define flush_cache_vunmap(start,end) do { } while (0)
|
|
|
|
#define flush_dcache_page(page) do { } while (0)
|
|
|
|
#define flush_cache_page(vma,addr,pfn) do { } while (0)
|
|
#define flush_cache_range(vma,start,end) do { } while (0)
|
|
|
|
#endif
|
|
|
|
#define flush_icache_range(start,end) \
|
|
__invalidate_icache_range(start,(end)-(start))
|
|
|
|
/* This is not required, see Documentation/cachetlb.txt */
|
|
|
|
#define flush_icache_page(vma,page) do { } while(0)
|
|
|
|
#define flush_dcache_mmap_lock(mapping) do { } while (0)
|
|
#define flush_dcache_mmap_unlock(mapping) 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)
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _XTENSA_CACHEFLUSH_H */
|
|
|