[mirror_ubuntu-zesty-kernel.git] / arch / avr32 / include / asm / cacheflush.h

/*
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __ASM_AVR32_CACHEFLUSH_H
#define __ASM_AVR32_CACHEFLUSH_H

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

#define CACHE_OP_ICACHE_INVALIDATE	0x01
#define CACHE_OP_DCACHE_INVALIDATE	0x0b
#define CACHE_OP_DCACHE_CLEAN		0x0c
#define CACHE_OP_DCACHE_CLEAN_INVAL	0x0d

/*
 * Invalidate any cacheline containing virtual address vaddr without
 * writing anything back to memory.
 *
 * Note that this function may corrupt unrelated data structures when
 * applied on buffers that are not cacheline aligned in both ends.
 */
static inline void invalidate_dcache_line(void *vaddr)
{
	asm volatile("cache %0[0], %1"
		     :
		     : "r"(vaddr), "n"(CACHE_OP_DCACHE_INVALIDATE)
		     : "memory");
}

/*
 * Make sure any cacheline containing virtual address vaddr is written
 * to memory.
 */
static inline void clean_dcache_line(void *vaddr)
{
	asm volatile("cache %0[0], %1"
		     :
		     : "r"(vaddr), "n"(CACHE_OP_DCACHE_CLEAN)
		     : "memory");
}

/*
 * Make sure any cacheline containing virtual address vaddr is written
 * to memory and then invalidate it.
 */
static inline void flush_dcache_line(void *vaddr)
{
	asm volatile("cache %0[0], %1"
		     :
		     : "r"(vaddr), "n"(CACHE_OP_DCACHE_CLEAN_INVAL)
		     : "memory");
}

/*
 * Invalidate any instruction cacheline containing virtual address
 * vaddr.
 */
static inline void invalidate_icache_line(void *vaddr)
{
	asm volatile("cache %0[0], %1"
		     :
		     : "r"(vaddr), "n"(CACHE_OP_ICACHE_INVALIDATE)
		     : "memory");
}

/*
 * Applies the above functions on all lines that are touched by the
 * specified virtual address range.
 */
void invalidate_dcache_region(void *start, size_t len);
void clean_dcache_region(void *start, size_t len);
void flush_dcache_region(void *start, size_t len);
void invalidate_icache_region(void *start, size_t len);

/*
 * Make sure any pending writes are completed before continuing.
 */
#define flush_write_buffer() asm volatile("sync 0" : : : "memory")

/*
 * The following functions are called when a virtual mapping changes.
 * We do not need to flush anything in this case.
 */
#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(vma, 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)

/*
 * I think we need to implement this one to be able to reliably
 * execute pages from RAMDISK. However, if we implement the
 * flush_dcache_*() functions, it might not be needed anymore.
 *
 * #define flush_icache_page(vma, page)		do { } while (0)
 */
extern void flush_icache_page(struct vm_area_struct *vma, struct page *page);

/*
 * These are (I think) related to D-cache aliasing.  We might need to
 * do something here, but only for certain configurations.  No such
 * configurations exist at this time.
 */
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
#define flush_dcache_page(page)			do { } while (0)
#define flush_dcache_mmap_lock(page)		do { } while (0)
#define flush_dcache_mmap_unlock(page)		do { } while (0)

/*
 * These are for I/D cache coherency. In this case, we do need to
 * flush with all configurations.
 */
extern void flush_icache_range(unsigned long start, unsigned long end);

extern void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
		unsigned long vaddr, void *dst, const void *src,
		unsigned long len);

static inline void copy_from_user_page(struct vm_area_struct *vma,
		struct page *page, unsigned long vaddr, void *dst,
		const void *src, unsigned long len)
{
	memcpy(dst, src, len);
}

#endif /* __ASM_AVR32_CACHEFLUSH_H */
Commit	Line	Data
5f97f7f9 HS	1	/*
	2	* Copyright (C) 2004-2006 Atmel Corporation
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*/
	8	#ifndef __ASM_AVR32_CACHEFLUSH_H
	9	#define __ASM_AVR32_CACHEFLUSH_H
	10
	11	/* Keep includes the same across arches. */
	12	#include <linux/mm.h>
	13
	14	#define CACHE_OP_ICACHE_INVALIDATE 0x01
	15	#define CACHE_OP_DCACHE_INVALIDATE 0x0b
	16	#define CACHE_OP_DCACHE_CLEAN 0x0c
	17	#define CACHE_OP_DCACHE_CLEAN_INVAL 0x0d
	18
	19	/*
	20	* Invalidate any cacheline containing virtual address vaddr without
	21	* writing anything back to memory.
	22	*
	23	* Note that this function may corrupt unrelated data structures when
	24	* applied on buffers that are not cacheline aligned in both ends.
	25	*/
	26	static inline void invalidate_dcache_line(void *vaddr)
	27	{
	28	asm volatile("cache %0[0], %1"
	29	:
	30	: "r"(vaddr), "n"(CACHE_OP_DCACHE_INVALIDATE)
	31	: "memory");
	32	}
	33
	34	/*
	35	* Make sure any cacheline containing virtual address vaddr is written
	36	* to memory.
	37	*/
	38	static inline void clean_dcache_line(void *vaddr)
	39	{
	40	asm volatile("cache %0[0], %1"
	41	:
	42	: "r"(vaddr), "n"(CACHE_OP_DCACHE_CLEAN)
	43	: "memory");
	44	}
	45
	46	/*
	47	* Make sure any cacheline containing virtual address vaddr is written
	48	* to memory and then invalidate it.
	49	*/
	50	static inline void flush_dcache_line(void *vaddr)
	51	{
	52	asm volatile("cache %0[0], %1"
	53	:
	54	: "r"(vaddr), "n"(CACHE_OP_DCACHE_CLEAN_INVAL)
	55	: "memory");
	56	}
	57
	58	/*
	59	* Invalidate any instruction cacheline containing virtual address
	60	* vaddr.
	61	*/
	62	static inline void invalidate_icache_line(void *vaddr)
	63	{
	64	asm volatile("cache %0[0], %1"
65	:
66	: "r"(vaddr), "n"(CACHE_OP_ICACHE_INVALIDATE)
67	: "memory");
68	}
69
70	/*
71	* Applies the above functions on all lines that are touched by the
72	* specified virtual address range.
73	*/
74	void invalidate_dcache_region(void *start, size_t len);
75	void clean_dcache_region(void *start, size_t len);
76	void flush_dcache_region(void *start, size_t len);
77	void invalidate_icache_region(void *start, size_t len);
78
79	/*
80	* Make sure any pending writes are completed before continuing.
81	*/
82	#define flush_write_buffer() asm volatile("sync 0" : : : "memory")
83
84	/*
85	* The following functions are called when a virtual mapping changes.
86	* We do not need to flush anything in this case.
87	*/
88	#define flush_cache_all() do { } while (0)
89	#define flush_cache_mm(mm) do { } while (0)
ec8c0446	90	#define flush_cache_dup_mm(mm) do { } while (0)
5f97f7f9 HS	91	#define flush_cache_range(vma, start, end) do { } while (0)
	92	#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
	93	#define flush_cache_vmap(start, end) do { } while (0)
	94	#define flush_cache_vunmap(start, end) do { } while (0)
	95
	96	/*
	97	* I think we need to implement this one to be able to reliably
	98	* execute pages from RAMDISK. However, if we implement the
	99	* flush_dcache_*() functions, it might not be needed anymore.
	100	*
	101	* #define flush_icache_page(vma, page) do { } while (0)
	102	*/
	103	extern void flush_icache_page(struct vm_area_struct vma, struct page page);
	104
	105	/*
	106	* These are (I think) related to D-cache aliasing. We might need to
	107	* do something here, but only for certain configurations. No such
	108	* configurations exist at this time.
	109	*/
2d4dc890	110	#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
5f97f7f9 HS	111	#define flush_dcache_page(page) do { } while (0)
	112	#define flush_dcache_mmap_lock(page) do { } while (0)
	113	#define flush_dcache_mmap_unlock(page) do { } while (0)
	114
	115	/*
	116	* These are for I/D cache coherency. In this case, we do need to
	117	* flush with all configurations.
	118	*/
	119	extern void flush_icache_range(unsigned long start, unsigned long end);
5f97f7f9	120
68ca3e53 HS	121	extern void copy_to_user_page(struct vm_area_struct vma, struct page page,
	122	unsigned long vaddr, void dst, const void src,
	123	unsigned long len);
	124
	125	static inline void copy_from_user_page(struct vm_area_struct *vma,
	126	struct page page, unsigned long vaddr, void dst,
	127	const void *src, unsigned long len)
	128	{
	129	memcpy(dst, src, len);
	130	}
5f97f7f9 HS	131
5f97f7f9 HS	132	#endif /* __ASM_AVR32_CACHEFLUSH_H */