1/*
2 *  linux/arch/m32r/mm/cache.c
3 *
4 *  Copyright (C) 2002-2005  Hirokazu Takata, Hayato Fujiwara
5 */
6
7#include <asm/pgtable.h>
8
9#undef MCCR
10
11#if defined(CONFIG_CHIP_XNUX2) || defined(CONFIG_CHIP_M32700) \
12	|| defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_OPSP)
13/* Cache Control Register */
14#define MCCR		((volatile unsigned long*)0xfffffffc)
15#define MCCR_CC		(1UL << 7)	/* Cache mode modify bit */
16#define MCCR_IIV	(1UL << 6)	/* I-cache invalidate */
17#define MCCR_DIV	(1UL << 5)	/* D-cache invalidate */
18#define MCCR_DCB	(1UL << 4)	/* D-cache copy back */
19#define MCCR_ICM	(1UL << 1)	/* I-cache mode [0:off,1:on] */
20#define MCCR_DCM	(1UL << 0)	/* D-cache mode [0:off,1:on] */
21#define MCCR_ICACHE_INV		(MCCR_CC|MCCR_IIV)
22#define MCCR_DCACHE_CB		(MCCR_CC|MCCR_DCB)
23#define MCCR_DCACHE_CBINV	(MCCR_CC|MCCR_DIV|MCCR_DCB)
24#define CHECK_MCCR(mccr)	(mccr = *MCCR)
25#elif defined(CONFIG_CHIP_M32102)
26#define MCCR		((volatile unsigned char*)0xfffffffe)
27#define MCCR_IIV	(1UL << 0)	/* I-cache invalidate */
28#define MCCR_ICACHE_INV		MCCR_IIV
29#elif defined(CONFIG_CHIP_M32104)
30#define MCCR		((volatile unsigned short*)0xfffffffe)
31#define MCCR_IIV	(1UL << 8)	/* I-cache invalidate */
32#define MCCR_DIV	(1UL << 9)	/* D-cache invalidate */
33#define MCCR_DCB	(1UL << 10)	/* D-cache copy back */
34#define MCCR_ICM	(1UL << 0)	/* I-cache mode [0:off,1:on] */
35#define MCCR_DCM	(1UL << 1)	/* D-cache mode [0:off,1:on] */
36#define MCCR_ICACHE_INV		MCCR_IIV
37#define MCCR_DCACHE_CB		MCCR_DCB
38#define MCCR_DCACHE_CBINV	(MCCR_DIV|MCCR_DCB)
39#endif
40
41#ifndef MCCR
42#error Unknown cache type.
43#endif
44
45
46/* Copy back and invalidate D-cache and invalidate I-cache all */
47void _flush_cache_all(void)
48{
49#if defined(CONFIG_CHIP_M32102)
50	unsigned char mccr;
51	*MCCR = MCCR_ICACHE_INV;
52#elif defined(CONFIG_CHIP_M32104)
53	unsigned short mccr;
54
55	/* Copyback and invalidate D-cache */
56	/* Invalidate I-cache */
57	*MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CBINV);
58#else
59	unsigned long mccr;
60
61	/* Copyback and invalidate D-cache */
62	/* Invalidate I-cache */
63	*MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CBINV;
64#endif
65	while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
66}
67
68/* Copy back D-cache and invalidate I-cache all */
69void _flush_cache_copyback_all(void)
70{
71#if defined(CONFIG_CHIP_M32102)
72	unsigned char mccr;
73	*MCCR = MCCR_ICACHE_INV;
74#elif defined(CONFIG_CHIP_M32104)
75	unsigned short mccr;
76
77	/* Copyback and invalidate D-cache */
78	/* Invalidate I-cache */
79	*MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CB);
80#else
81	unsigned long mccr;
82
83	/* Copyback D-cache */
84	/* Invalidate I-cache */
85	*MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CB;
86#endif
87	while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
88}
89