forked from Minki/linux
2ee2ff875a
Microblaze version 7.20.d is the first MB version which can be run on MMU linux. Please do not used previous version because they contain HW bug. Based on WB support was necessary to redesign whole cache design. Microblaze versions from 7.20.a don't need to disable IRQ and cache before working with them that's why there are special structures for it. Signed-off-by: Michal Simek <monstr@monstr.eu>
110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
/*
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* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2007-2009 PetaLogix
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* Copyright (C) 2007 John Williams <john.williams@petalogix.com>
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* based on v850 version which was
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* Copyright (C) 2001,02,03 NEC Electronics Corporation
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* Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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*
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*/
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#ifndef _ASM_MICROBLAZE_CACHEFLUSH_H
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#define _ASM_MICROBLAZE_CACHEFLUSH_H
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/* Somebody depends on this; sigh... */
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#include <linux/mm.h>
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/* Look at Documentation/cachetlb.txt */
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/*
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* Cache handling functions.
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* Microblaze has a write-through data cache, meaning that the data cache
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* never needs to be flushed. The only flushing operations that are
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* implemented are to invalidate the instruction cache. These are called
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* after loading a user application into memory, we must invalidate the
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* instruction cache to make sure we don't fetch old, bad code.
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*/
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/* struct cache, d=dcache, i=icache, fl = flush, iv = invalidate,
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* suffix r = range */
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struct scache {
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/* icache */
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void (*ie)(void); /* enable */
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void (*id)(void); /* disable */
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void (*ifl)(void); /* flush */
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void (*iflr)(unsigned long a, unsigned long b);
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void (*iin)(void); /* invalidate */
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void (*iinr)(unsigned long a, unsigned long b);
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/* dcache */
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void (*de)(void); /* enable */
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void (*dd)(void); /* disable */
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void (*dfl)(void); /* flush */
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void (*dflr)(unsigned long a, unsigned long b);
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void (*din)(void); /* invalidate */
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void (*dinr)(unsigned long a, unsigned long b);
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};
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/* microblaze cache */
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extern struct scache *mbc;
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void microblaze_cache_init(void);
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#define enable_icache() mbc->ie();
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#define disable_icache() mbc->id();
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#define flush_icache() mbc->ifl();
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#define flush_icache_range(start, end) mbc->iflr(start, end);
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#define invalidate_icache() mbc->iin();
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#define invalidate_icache_range(start, end) mbc->iinr(start, end);
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#define flush_icache_user_range(vma, pg, adr, len) flush_icache();
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#define flush_icache_page(vma, pg) do { } while (0)
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#define enable_dcache() mbc->de();
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#define disable_dcache() mbc->dd();
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/* FIXME for LL-temac driver */
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#define invalidate_dcache() mbc->din();
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#define invalidate_dcache_range(start, end) mbc->dinr(start, end);
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#define flush_dcache() mbc->dfl();
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#define flush_dcache_range(start, end) mbc->dflr(start, end);
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
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/* D-cache aliasing problem can't happen - cache is between MMU and ram */
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#define flush_dcache_page(page) do { } while (0)
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#define flush_dcache_mmap_lock(mapping) do { } while (0)
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#define flush_dcache_mmap_unlock(mapping) do { } while (0)
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#define flush_cache_dup_mm(mm) do { } while (0)
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#define flush_cache_vmap(start, end) do { } while (0)
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#define flush_cache_vunmap(start, end) do { } while (0)
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#define flush_cache_mm(mm) do { } while (0)
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#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
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/* MS: kgdb code use this macro, wrong len with FLASH */
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#if 0
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#define flush_cache_range(vma, start, len) { \
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flush_icache_range((unsigned) (start), (unsigned) (start) + (len)); \
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flush_dcache_range((unsigned) (start), (unsigned) (start) + (len)); \
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}
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#endif
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#define flush_cache_range(vma, start, len) do { } while (0)
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#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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memcpy((dst), (src), (len)); \
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flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
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} while (0)
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#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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memcpy((dst), (src), (len)); \
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} while (0)
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#endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */
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