summaryrefslogtreecommitdiffstats
path: root/arch/m68k/include/asm/cacheflush_mm.h
blob: 16bf375fdbe1c25a36992dfe94c066b074cbe736 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
#ifndef _M68K_CACHEFLUSH_H
#define _M68K_CACHEFLUSH_H

#include <linux/mm.h>

/* cache code */
#define FLUSH_I_AND_D	(0x00000808)
#define FLUSH_I		(0x00000008)

/*
 * Cache handling functions
 */

static inline void flush_icache(void)
{
	if (CPU_IS_040_OR_060)
		asm volatile (	"nop\n"
			"	.chip	68040\n"
			"	cpusha	%bc\n"
			"	.chip	68k");
	else {
		unsigned long tmp;
		asm volatile (	"movec	%%cacr,%0\n"
			"	or.w	%1,%0\n"
			"	movec	%0,%%cacr"
			: "=&d" (tmp)
			: "id" (FLUSH_I));
	}
}

/*
 * invalidate the cache for the specified memory range.
 * It starts at the physical address specified for
 * the given number of bytes.
 */
extern void cache_clear(unsigned long paddr, int len);
/*
 * push any dirty cache in the specified memory range.
 * It starts at the physical address specified for
 * the given number of bytes.
 */
extern void cache_push(unsigned long paddr, int len);

/*
 * push and invalidate pages in the specified user virtual
 * memory range.
 */
extern void cache_push_v(unsigned long vaddr, int len);

/* This is needed whenever the virtual mapping of the current
   process changes.  */
#define __flush_cache_all()					\
({								\
	if (CPU_IS_040_OR_060)					\
		__asm__ __volatile__("nop\n\t"			\
				     ".chip 68040\n\t"		\
				     "cpusha %dc\n\t"		\
				     ".chip 68k");		\
	else {							\
		unsigned long _tmp;				\
		__asm__ __volatile__("movec %%cacr,%0\n\t"	\
				     "orw %1,%0\n\t"		\
				     "movec %0,%%cacr"		\
				     : "=&d" (_tmp)		\
				     : "di" (FLUSH_I_AND_D));	\
	}							\
})

#define __flush_cache_030()					\
({								\
	if (CPU_IS_020_OR_030) {				\
		unsigned long _tmp;				\
		__asm__ __volatile__("movec %%cacr,%0\n\t"	\
				     "orw %1,%0\n\t"		\
				     "movec %0,%%cacr"		\
				     : "=&d" (_tmp)		\
				     : "di" (FLUSH_I_AND_D));	\
	}							\
})

#define flush_cache_all() __flush_cache_all()

#define flush_cache_vmap(start, end)		flush_cache_all()
#define flush_cache_vunmap(start, end)		flush_cache_all()

static inline void flush_cache_mm(struct mm_struct *mm)
{
	if (mm == current->mm)
		__flush_cache_030();
}

#define flush_cache_dup_mm(mm)			flush_cache_mm(mm)

/* flush_cache_range/flush_cache_page must be macros to avoid
   a dependency on linux/mm.h, which includes this file... */
static inline void flush_cache_range(struct vm_area_struct *vma,
				     unsigned long start,
				     unsigned long end)
{
	if (vma->vm_mm == current->mm)
	        __flush_cache_030();
}

static inline void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn)
{
	if (vma->vm_mm == current->mm)
	        __flush_cache_030();
}


/* Push the page at kernel virtual address and clear the icache */
/* RZ: use cpush %bc instead of cpush %dc, cinv %ic */
static inline void __flush_page_to_ram(void *vaddr)
{
	if (CPU_IS_040_OR_060) {
		__asm__ __volatile__("nop\n\t"
				     ".chip 68040\n\t"
				     "cpushp %%bc,(%0)\n\t"
				     ".chip 68k"
				     : : "a" (__pa(vaddr)));
	} else {
		unsigned long _tmp;
		__asm__ __volatile__("movec %%cacr,%0\n\t"
				     "orw %1,%0\n\t"
				     "movec %0,%%cacr"
				     : "=&d" (_tmp)
				     : "di" (FLUSH_I));
	}
}

#define flush_dcache_page(page)		__flush_page_to_ram(page_address(page))
#define flush_dcache_mmap_lock(mapping)		do { } while (0)
#define flush_dcache_mmap_unlock(mapping)	do { } while (0)
#define flush_icache_page(vma, page)	__flush_page_to_ram(page_address(page))

extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
				    unsigned long addr, int len);
extern void flush_icache_range(unsigned long address, unsigned long endaddr);

static inline void copy_to_user_page(struct vm_area_struct *vma,
				     struct page *page, unsigned long vaddr,
				     void *dst, void *src, int len)
{
	flush_cache_page(vma, vaddr, page_to_pfn(page));
	memcpy(dst, src, len);
	flush_icache_user_range(vma, page, vaddr, len);
}
static inline void copy_from_user_page(struct vm_area_struct *vma,
				       struct page *page, unsigned long vaddr,
				       void *dst, void *src, int len)
{
	flush_cache_page(vma, vaddr, page_to_pfn(page));
	memcpy(dst, src, len);
}

#endif /* _M68K_CACHEFLUSH_H */
OpenPOWER on IntegriCloud