[linux-2.6-block.git] / arch / sh / mm / cache-sh2a.c

/*
 * arch/sh/mm/cache-sh2a.c
 *
 * Copyright (C) 2008 Yoshinori Sato
 *
 * Released under the terms of the GNU GPL v2.0.
 */

#include <linux/init.h>
#include <linux/mm.h>

#include <asm/cache.h>
#include <asm/addrspace.h>
#include <asm/processor.h>
#include <asm/cacheflush.h>
#include <asm/io.h>

void __flush_wback_region(void *start, int size)
{
	unsigned long v;
	unsigned long begin, end;
	unsigned long flags;

	begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
	end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
		& ~(L1_CACHE_BYTES-1);

	local_irq_save(flags);
	jump_to_uncached();

	for (v = begin; v < end; v+=L1_CACHE_BYTES) {
		unsigned long addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x000007f0);
		int way;
		for (way = 0; way < 4; way++) {
			unsigned long data =  ctrl_inl(addr | (way << 11));
			if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
				data &= ~SH_CACHE_UPDATED;
				ctrl_outl(data, addr | (way << 11));
			}
		}
	}

	back_to_cached();
	local_irq_restore(flags);
}

void __flush_purge_region(void *start, int size)
{
	unsigned long v;
	unsigned long begin, end;
	unsigned long flags;

	begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
	end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
		& ~(L1_CACHE_BYTES-1);

	local_irq_save(flags);
	jump_to_uncached();

	for (v = begin; v < end; v+=L1_CACHE_BYTES) {
		ctrl_outl((v & CACHE_PHYSADDR_MASK),
			  CACHE_OC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
	}
	back_to_cached();
	local_irq_restore(flags);
}

void __flush_invalidate_region(void *start, int size)
{
	unsigned long v;
	unsigned long begin, end;
	unsigned long flags;

	begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
	end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
		& ~(L1_CACHE_BYTES-1);
	local_irq_save(flags);
	jump_to_uncached();

#ifdef CONFIG_CACHE_WRITEBACK
	ctrl_outl(ctrl_inl(CCR) | CCR_OCACHE_INVALIDATE, CCR);
	/* I-cache invalidate */
	for (v = begin; v < end; v+=L1_CACHE_BYTES) {
		ctrl_outl((v & CACHE_PHYSADDR_MASK),
			  CACHE_IC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
	}
#else
	for (v = begin; v < end; v+=L1_CACHE_BYTES) {
		ctrl_outl((v & CACHE_PHYSADDR_MASK),
			  CACHE_IC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
		ctrl_outl((v & CACHE_PHYSADDR_MASK),
			  CACHE_OC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
	}
#endif
	back_to_cached();
	local_irq_restore(flags);
}

/* WBack O-Cache and flush I-Cache */
void flush_icache_range(unsigned long start, unsigned long end)
{
	unsigned long v;
	unsigned long flags;

	start = start & ~(L1_CACHE_BYTES-1);
	end = (end + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1);

	local_irq_save(flags);
	jump_to_uncached();

	for (v = start; v < end; v+=L1_CACHE_BYTES) {
		unsigned long addr = (v & 0x000007f0);
		int way;
		/* O-Cache writeback */
		for (way = 0; way < 4; way++) {
			unsigned long data =  ctrl_inl(CACHE_OC_ADDRESS_ARRAY | addr | (way << 11));
			if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
				data &= ~SH_CACHE_UPDATED;
				ctrl_outl(data, CACHE_OC_ADDRESS_ARRAY | addr | (way << 11));
			}
		}
		/* I-Cache invalidate */
		ctrl_outl(addr,
			  CACHE_IC_ADDRESS_ARRAY | addr | 0x00000008);
	}

	back_to_cached();
	local_irq_restore(flags);
}
Commit	Line	Data
cce2d453 YS	1	/*
	2	* arch/sh/mm/cache-sh2a.c
	3	*
	4	* Copyright (C) 2008 Yoshinori Sato
	5	*
	6	* Released under the terms of the GNU GPL v2.0.
	7	*/
	8
	9	#include <linux/init.h>
	10	#include <linux/mm.h>
	11
	12	#include <asm/cache.h>
	13	#include <asm/addrspace.h>
	14	#include <asm/processor.h>
	15	#include <asm/cacheflush.h>
	16	#include <asm/io.h>
	17
	18	void __flush_wback_region(void *start, int size)
	19	{
	20	unsigned long v;
	21	unsigned long begin, end;
	22	unsigned long flags;
	23
	24	begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
	25	end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
	26	& ~(L1_CACHE_BYTES-1);
	27
	28	local_irq_save(flags);
	29	jump_to_uncached();
	30
	31	for (v = begin; v < end; v+=L1_CACHE_BYTES) {
	32	unsigned long addr = CACHE_OC_ADDRESS_ARRAY \| (v & 0x000007f0);
	33	int way;
	34	for (way = 0; way < 4; way++) {
	35	unsigned long data = ctrl_inl(addr \| (way << 11));
	36	if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
	37	data &= ~SH_CACHE_UPDATED;
	38	ctrl_outl(data, addr \| (way << 11));
	39	}
	40	}
	41	}
	42
	43	back_to_cached();
	44	local_irq_restore(flags);
	45	}
	46
	47	void __flush_purge_region(void *start, int size)
	48	{
	49	unsigned long v;
	50	unsigned long begin, end;
	51	unsigned long flags;
	52
	53	begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
	54	end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
	55	& ~(L1_CACHE_BYTES-1);
	56
	57	local_irq_save(flags);
	58	jump_to_uncached();
	59
	60	for (v = begin; v < end; v+=L1_CACHE_BYTES) {
	61	ctrl_outl((v & CACHE_PHYSADDR_MASK),
216813a8	62	CACHE_OC_ADDRESS_ARRAY \| (v & 0x000007f0) \| 0x00000008);
cce2d453 YS	63	}
	64	back_to_cached();
	65	local_irq_restore(flags);
	66	}
	67
	68	void __flush_invalidate_region(void *start, int size)
	69	{
	70	unsigned long v;
	71	unsigned long begin, end;
	72	unsigned long flags;
	73
	74	begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
	75	end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
	76	& ~(L1_CACHE_BYTES-1);
	77	local_irq_save(flags);
	78	jump_to_uncached();
	79
	80	#ifdef CONFIG_CACHE_WRITEBACK
	81	ctrl_outl(ctrl_inl(CCR) \| CCR_OCACHE_INVALIDATE, CCR);
	82	/* I-cache invalidate */
	83	for (v = begin; v < end; v+=L1_CACHE_BYTES) {
	84	ctrl_outl((v & CACHE_PHYSADDR_MASK),
216813a8	85	CACHE_IC_ADDRESS_ARRAY \| (v & 0x000007f0) \| 0x00000008);
cce2d453 YS	86	}
	87	#else
	88	for (v = begin; v < end; v+=L1_CACHE_BYTES) {
	89	ctrl_outl((v & CACHE_PHYSADDR_MASK),
216813a8	90	CACHE_IC_ADDRESS_ARRAY \| (v & 0x000007f0) \| 0x00000008);
cce2d453	91	ctrl_outl((v & CACHE_PHYSADDR_MASK),
216813a8	92	CACHE_OC_ADDRESS_ARRAY \| (v & 0x000007f0) \| 0x00000008);
cce2d453 YS	93	}
	94	#endif
	95	back_to_cached();
	96	local_irq_restore(flags);
	97	}
	98
	99	/* WBack O-Cache and flush I-Cache */
	100	void flush_icache_range(unsigned long start, unsigned long end)
	101	{
	102	unsigned long v;
	103	unsigned long flags;
	104
	105	start = start & ~(L1_CACHE_BYTES-1);
	106	end = (end + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1);
	107
	108	local_irq_save(flags);
	109	jump_to_uncached();
	110
	111	for (v = start; v < end; v+=L1_CACHE_BYTES) {
	112	unsigned long addr = (v & 0x000007f0);
	113	int way;
	114	/* O-Cache writeback */
	115	for (way = 0; way < 4; way++) {
	116	unsigned long data = ctrl_inl(CACHE_OC_ADDRESS_ARRAY \| addr \| (way << 11));
	117	if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
	118	data &= ~SH_CACHE_UPDATED;
	119	ctrl_outl(data, CACHE_OC_ADDRESS_ARRAY \| addr \| (way << 11));
	120	}
	121	}
	122	/* I-Cache invalidate */
	123	ctrl_outl(addr,
	124	CACHE_IC_ADDRESS_ARRAY \| addr \| 0x00000008);
	125	}
	126
	127	back_to_cached();
	128	local_irq_restore(flags);
	129	}