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/*
* include/asm-sh/cpu-sh3/cacheflush.h
*
* Copyright (C) 1999 Niibe Yutaka
*
* 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_CPU_SH3_CACHEFLUSH_H
#define __ASM_CPU_SH3_CACHEFLUSH_H
/*
* Cache flushing:
*
* - flush_cache_all() flushes entire cache
* - flush_cache_mm(mm) flushes the specified mm context's cache lines
* - flush_cache_page(mm, vmaddr, pfn) flushes a single page
* - flush_cache_range(vma, start, end) flushes a range of pages
*
* - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
* - flush_icache_range(start, end) flushes(invalidates) a range for icache
* - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
*
* Caches are indexed (effectively) by physical address on SH-3, so
* we don't need them.
*/
#if defined(CONFIG_SH7705_CACHE_32KB)
/* SH7705 is an SH3 processor with 32KB cache. This has alias issues like the
* SH4. Unlike the SH4 this is a unified cache so we need to do some work
* in mmap when 'exec'ing a new binary
*/
/* 32KB cache, 4kb PAGE sizes need to check bit 12 */
#define CACHE_ALIAS 0x00001000
#define PG_mapped PG_arch_1
void flush_cache_all(void);
void flush_cache_mm(struct mm_struct *mm);
void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end);
void flush_cache_page(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn);
void flush_dcache_page(struct page *pg);
void flush_icache_range(unsigned long start, unsigned long end);
void flush_icache_page(struct vm_area_struct *vma, struct page *page);
#else
#define flush_cache_all() do { } while (0)
#define flush_cache_mm(mm) do { } while (0)
#define flush_cache_range(vma, start, end) do { } while (0)
#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
#define flush_dcache_page(page) do { } while (0)
#define flush_icache_range(start, end) do { } while (0)
#define flush_icache_page(vma,pg) do { } while (0)
#endif
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
/* SH3 has unified cache so no special action needed here */
#define flush_cache_sigtramp(vaddr) do { } while (0)
#define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
#define p3_cache_init() do { } while (0)
/*
* We provide our own get_unmapped_area to avoid cache aliasing issues
* on SH7705 with a 32KB cache, and to page align addresses in the
* non-aliasing case.
*/
#define HAVE_ARCH_UNMAPPED_AREA
#endif /* __ASM_CPU_SH3_CACHEFLUSH_H */
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