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/*
* 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 - 2007 Tensilica Inc.
*/
#ifndef _XTENSA_CACHEFLUSH_H
#define _XTENSA_CACHEFLUSH_H
#ifdef __KERNEL__
#include <linux/mm.h>
#include <asm/processor.h>
#include <asm/page.h>
/*
* Lo-level routines for cache flushing.
*
* 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)
*
* specials for cache aliasing:
*
* __flush_invalidate_dcache_page_alias(vaddr,paddr)
* __invalidate_icache_page_alias(vaddr,paddr)
*/
extern void __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_invalidate_dcache_all(void);
extern void __flush_dcache_page(unsigned long);
extern void __flush_dcache_range(unsigned long, unsigned long);
extern void __flush_invalidate_dcache_page(unsigned long);
extern void __flush_invalidate_dcache_range(unsigned long, unsigned long);
#else
# define __flush_dcache_range(p,s) do { } while(0)
# define __flush_dcache_page(p) do { } while(0)
# define __flush_invalidate_dcache_page(p) __invalidate_dcache_page(p)
# define __flush_invalidate_dcache_range(p,s) __invalidate_dcache_range(p,s)
#endif
#if (DCACHE_WAY_SIZE > PAGE_SIZE)
extern void __flush_invalidate_dcache_page_alias(unsigned long, unsigned long);
#endif
#if (ICACHE_WAY_SIZE > PAGE_SIZE)
extern void __invalidate_icache_page_alias(unsigned long, unsigned long);
#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)
#define flush_cache_all() \
do { \
__flush_invalidate_dcache_all(); \
__invalidate_icache_all(); \
} while (0)
#define flush_cache_mm(mm) flush_cache_all()
#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
#define flush_cache_vmap(start,end) flush_cache_all()
#define flush_cache_vunmap(start,end) flush_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_dup_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
/* Ensure consistency between data and instruction cache. */
#define flush_icache_range(start,end) \
do { \
__flush_dcache_range(start, (end) - (start)); \
__invalidate_icache_range(start,(end) - (start)); \
} while (0)
/* 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)
#if (DCACHE_WAY_SIZE > PAGE_SIZE)
extern void copy_to_user_page(struct vm_area_struct*, struct page*,
unsigned long, void*, const void*, unsigned long);
extern void copy_from_user_page(struct vm_area_struct*, struct page*,
unsigned long, void*, const void*, unsigned long);
#else
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
memcpy(dst, src, len); \
__flush_dcache_range((unsigned long) dst, len); \
__invalidate_icache_range((unsigned long) dst, len); \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len)
#endif
#endif /* __KERNEL__ */
#endif /* _XTENSA_CACHEFLUSH_H */
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