aboutsummaryrefslogtreecommitdiffstats
path: root/arch/parisc/include/asm/cacheflush.h
blob: 19c9c3c5f267eac813edf6c5fc6f358301d2a639 (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
#ifndef _PARISC_CACHEFLUSH_H
#define _PARISC_CACHEFLUSH_H

#include <linux/mm.h>
#include <linux/uaccess.h>
#include <asm/tlbflush.h>

/* The usual comment is "Caches aren't brain-dead on the <architecture>".
 * Unfortunately, that doesn't apply to PA-RISC. */

/* Internal implementation */
void flush_data_cache_local(void *);  /* flushes local data-cache only */
void flush_instruction_cache_local(void *); /* flushes local code-cache only */
#ifdef CONFIG_SMP
void flush_data_cache(void); /* flushes data-cache only (all processors) */
void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
#else
#define flush_data_cache() flush_data_cache_local(NULL)
#define flush_instruction_cache() flush_instruction_cache_local(NULL)
#endif

#define flush_cache_dup_mm(mm) flush_cache_mm(mm)

void flush_user_icache_range_asm(unsigned long, unsigned long);
void flush_kernel_icache_range_asm(unsigned long, unsigned long);
void flush_user_dcache_range_asm(unsigned long, unsigned long);
void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
void flush_kernel_dcache_page_asm(void *);
void flush_kernel_icache_page(void *);

/* Cache flush operations */

void flush_cache_all_local(void);
void flush_cache_all(void);
void flush_cache_mm(struct mm_struct *mm);

#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
void flush_kernel_dcache_page_addr(void *addr);
static inline void flush_kernel_dcache_page(struct page *page)
{
	flush_kernel_dcache_page_addr(page_address(page));
}

#define flush_kernel_dcache_range(start,size) \
	flush_kernel_dcache_range_asm((start), (start)+(size));
/* vmap range flushes and invalidates.  Architecturally, we don't need
 * the invalidate, because the CPU should refuse to speculate once an
 * area has been flushed, so invalidate is left empty */
static inline void flush_kernel_vmap_range(void *vaddr, int size)
{
	unsigned long start = (unsigned long)vaddr;

	flush_kernel_dcache_range_asm(start, start + size);
}
static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
{
	unsigned long start = (unsigned long)vaddr;
	void *cursor = vaddr;

	for ( ; cursor < vaddr + size; cursor += PAGE_SIZE) {
		struct page *page = vmalloc_to_page(cursor);

		if (test_and_clear_bit(PG_dcache_dirty, &page->flags))
			flush_kernel_dcache_page(page);
	}
	flush_kernel_dcache_range_asm(start, start + size);
}

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

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
extern void flush_dcache_page(struct page *page);

#define flush_dcache_mmap_lock(mapping) \
	spin_lock_irq(&(mapping)->tree_lock)
#define flush_dcache_mmap_unlock(mapping) \
	spin_unlock_irq(&(mapping)->tree_lock)

#define flush_icache_page(vma,page)	do { 		\
	flush_kernel_dcache_page(page);			\
	flush_kernel_icache_page(page_address(page)); 	\
} while (0)

#define flush_icache_range(s,e)		do { 		\
	flush_kernel_dcache_range_asm(s,e); 		\
	flush_kernel_icache_range_asm(s,e); 		\
} while (0)

#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
	flush_cache_page(vma, vaddr, page_to_pfn(page)); \
	memcpy(dst, src, len); \
	flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
} while (0)

#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
do { \
	flush_cache_page(vma, vaddr, page_to_pfn(page)); \
	memcpy(dst, src, len); \
} while (0)

void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
void flush_cache_range(struct vm_area_struct *vma,
		unsigned long start, unsigned long end);

/* defined in pacache.S exported in cache.c used by flush_anon_page */
void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);

#define ARCH_HAS_FLUSH_ANON_PAGE
static inline void
flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
{
	if (PageAnon(page)) {
		flush_tlb_page(vma, vmaddr);
		preempt_disable();
		flush_dcache_page_asm(page_to_phys(page), vmaddr);
		preempt_enable();
	}
}

#include <asm/kmap_types.h>

#define ARCH_HAS_KMAP

static inline void *kmap(struct page *page)
{
	might_sleep();
	return page_address(page);
}

static inline void kunmap(struct page *page)
{
	flush_kernel_dcache_page_addr(page_address(page));
}

static inline void *kmap_atomic(struct page *page)
{
	preempt_disable();
	pagefault_disable();
	return page_address(page);
}

static inline void __kunmap_atomic(void *addr)
{
	flush_kernel_dcache_page_addr(addr);
	pagefault_enable();
	preempt_enable();
}

#define kmap_atomic_prot(page, prot)	kmap_atomic(page)
#define kmap_atomic_pfn(pfn)	kmap_atomic(pfn_to_page(pfn))

#endif /* _PARISC_CACHEFLUSH_H */

Privacy Policy