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/*
* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2007-2009 PetaLogix
* Copyright (C) 2007 John Williams <john.williams@petalogix.com>
* based on v850 version which was
* Copyright (C) 2001,02,03 NEC Electronics Corporation
* Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
*
* 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.
*
*/
#ifndef _ASM_MICROBLAZE_CACHEFLUSH_H
#define _ASM_MICROBLAZE_CACHEFLUSH_H
/* Somebody depends on this; sigh... */
#include <linux/mm.h>
/* Look at Documentation/cachetlb.txt */
/*
* Cache handling functions.
* Microblaze has a write-through data cache, meaning that the data cache
* never needs to be flushed. The only flushing operations that are
* implemented are to invalidate the instruction cache. These are called
* after loading a user application into memory, we must invalidate the
* instruction cache to make sure we don't fetch old, bad code.
*/
/* struct cache, d=dcache, i=icache, fl = flush, iv = invalidate,
* suffix r = range */
struct scache {
/* icache */
void (*ie)(void); /* enable */
void (*id)(void); /* disable */
void (*ifl)(void); /* flush */
void (*iflr)(unsigned long a, unsigned long b);
void (*iin)(void); /* invalidate */
void (*iinr)(unsigned long a, unsigned long b);
/* dcache */
void (*de)(void); /* enable */
void (*dd)(void); /* disable */
void (*dfl)(void); /* flush */
void (*dflr)(unsigned long a, unsigned long b);
void (*din)(void); /* invalidate */
void (*dinr)(unsigned long a, unsigned long b);
};
/* microblaze cache */
extern struct scache *mbc;
void microblaze_cache_init(void);
#define enable_icache() mbc->ie();
#define disable_icache() mbc->id();
#define flush_icache() mbc->ifl();
#define flush_icache_range(start, end) mbc->iflr(start, end);
#define invalidate_icache() mbc->iin();
#define invalidate_icache_range(start, end) mbc->iinr(start, end);
#define flush_icache_user_range(vma, pg, adr, len) flush_icache();
#define flush_icache_page(vma, pg) do { } while (0)
#define enable_dcache() mbc->de();
#define disable_dcache() mbc->dd();
/* FIXME for LL-temac driver */
#define invalidate_dcache() mbc->din();
#define invalidate_dcache_range(start, end) mbc->dinr(start, end);
#define flush_dcache() mbc->dfl();
#define flush_dcache_range(start, end) mbc->dflr(start, end);
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
/* D-cache aliasing problem can't happen - cache is between MMU and ram */
#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 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_cache_mm(mm) do { } while (0)
#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
/* MS: kgdb code use this macro, wrong len with FLASH */
#if 0
#define flush_cache_range(vma, start, len) { \
flush_icache_range((unsigned) (start), (unsigned) (start) + (len)); \
flush_dcache_range((unsigned) (start), (unsigned) (start) + (len)); \
}
#endif
#define flush_cache_range(vma, start, len) do { } while (0)
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
memcpy((dst), (src), (len)); \
flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
do { \
memcpy((dst), (src), (len)); \
} while (0)
#endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */
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