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Filename/usr/src/linux-headers-3.13.0-24/arch/frv/include/asm/cacheflush.h
Size3.05 kb
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Ownerroot : root
Create time27-Apr-2025 09:50
Last modified20-Jan-2014 10:40
Last accessed06-Jul-2025 21:59
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/* cacheflush.h: FRV cache flushing routines
*
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
* Written by David Howells ([email protected])
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/

#ifndef _ASM_CACHEFLUSH_H
#define _ASM_CACHEFLUSH_H

/* Keep includes the same across arches. */
#include <linux/mm.h>

/*
* virtually-indexed cache management (our cache is physically indexed)
*/
#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_range(mm, start, end) do {} while(0)
#define flush_cache_page(vma, vmaddr, pfn) do {} while(0)
#define flush_cache_vmap(start, end) do {} while(0)
#define flush_cache_vunmap(start, end) do {} while(0)
#define flush_dcache_mmap_lock(mapping) do {} while(0)
#define flush_dcache_mmap_unlock(mapping) do {} while(0)

/*
* physically-indexed cache management
* - see arch/frv/lib/cache.S
*/
extern void frv_dcache_writeback(unsigned long start, unsigned long size);
extern void frv_cache_invalidate(unsigned long start, unsigned long size);
extern void frv_icache_invalidate(unsigned long start, unsigned long size);
extern void frv_cache_wback_inv(unsigned long start, unsigned long size);

static inline void __flush_cache_all(void)
{
asm volatile(" dcef @(gr0,gr0),#1 \n"
" icei @(gr0,gr0),#1 \n"
" membar \n"
: : : "memory"
);
}

/* dcache/icache coherency... */
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
#ifdef CONFIG_MMU
extern void flush_dcache_page(struct page *page);
#else
static inline void flush_dcache_page(struct page *page)
{
unsigned long addr = page_to_phys(page);
frv_dcache_writeback(addr, addr + PAGE_SIZE);
}
#endif

static inline void flush_page_to_ram(struct page *page)
{
flush_dcache_page(page);
}

static inline void flush_icache(void)
{
__flush_cache_all();
}

static inline void flush_icache_range(unsigned long start, unsigned long end)
{
frv_cache_wback_inv(start, end);
}

#ifdef CONFIG_MMU
extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
unsigned long start, unsigned long len);
#else
static inline void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
unsigned long start, unsigned long len)
{
frv_cache_wback_inv(start, start + len);
}
#endif

static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page)
{
flush_icache_user_range(vma, page, page_to_phys(page), PAGE_SIZE);
}

/*
* permit ptrace to access another process's address space through the icache
* and the dcache
*/
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
memcpy((dst), (src), (len)); \
flush_icache_user_range((vma), (page), (vaddr), (len)); \
} while(0)

#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy((dst), (src), (len))

#endif /* _ASM_CACHEFLUSH_H */