1#ifndef _PARISC_CACHEFLUSH_H
2#define _PARISC_CACHEFLUSH_H
3
4#include <linux/mm.h>
5#include <linux/uaccess.h>
6#include <asm/tlbflush.h>
7
8/* The usual comment is "Caches aren't brain-dead on the <architecture>".
9 * Unfortunately, that doesn't apply to PA-RISC. */
10
11/* Internal implementation */
12void flush_data_cache_local(void *);  /* flushes local data-cache only */
13void flush_instruction_cache_local(void *); /* flushes local code-cache only */
14#ifdef CONFIG_SMP
15void flush_data_cache(void); /* flushes data-cache only (all processors) */
16void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
17#else
18#define flush_data_cache() flush_data_cache_local(NULL)
19#define flush_instruction_cache() flush_instruction_cache_local(NULL)
20#endif
21
22#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
23
24void flush_user_icache_range_asm(unsigned long, unsigned long);
25void flush_kernel_icache_range_asm(unsigned long, unsigned long);
26void flush_user_dcache_range_asm(unsigned long, unsigned long);
27void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
28void flush_kernel_dcache_page_asm(void *);
29void flush_kernel_icache_page(void *);
30void flush_user_dcache_range(unsigned long, unsigned long);
31void flush_user_icache_range(unsigned long, unsigned long);
32
33/* Cache flush operations */
34
35void flush_cache_all_local(void);
36void flush_cache_all(void);
37void flush_cache_mm(struct mm_struct *mm);
38
39#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
40void flush_kernel_dcache_page_addr(void *addr);
41static inline void flush_kernel_dcache_page(struct page *page)
42{
43	flush_kernel_dcache_page_addr(page_address(page));
44}
45
46#define flush_kernel_dcache_range(start,size) \
47	flush_kernel_dcache_range_asm((start), (start)+(size));
48/* vmap range flushes and invalidates.  Architecturally, we don't need
49 * the invalidate, because the CPU should refuse to speculate once an
50 * area has been flushed, so invalidate is left empty */
51static inline void flush_kernel_vmap_range(void *vaddr, int size)
52{
53	unsigned long start = (unsigned long)vaddr;
54
55	flush_kernel_dcache_range_asm(start, start + size);
56}
57static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
58{
59	unsigned long start = (unsigned long)vaddr;
60	void *cursor = vaddr;
61
62	for ( ; cursor < vaddr + size; cursor += PAGE_SIZE) {
63		struct page *page = vmalloc_to_page(cursor);
64
65		if (test_and_clear_bit(PG_dcache_dirty, &page->flags))
66			flush_kernel_dcache_page(page);
67	}
68	flush_kernel_dcache_range_asm(start, start + size);
69}
70
71#define flush_cache_vmap(start, end)		flush_cache_all()
72#define flush_cache_vunmap(start, end)		flush_cache_all()
73
74#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
75extern void flush_dcache_page(struct page *page);
76
77#define flush_dcache_mmap_lock(mapping) \
78	spin_lock_irq(&(mapping)->tree_lock)
79#define flush_dcache_mmap_unlock(mapping) \
80	spin_unlock_irq(&(mapping)->tree_lock)
81
82#define flush_icache_page(vma,page)	do { 		\
83	flush_kernel_dcache_page(page);			\
84	flush_kernel_icache_page(page_address(page)); 	\
85} while (0)
86
87#define flush_icache_range(s,e)		do { 		\
88	flush_kernel_dcache_range_asm(s,e); 		\
89	flush_kernel_icache_range_asm(s,e); 		\
90} while (0)
91
92#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
93do { \
94	flush_cache_page(vma, vaddr, page_to_pfn(page)); \
95	memcpy(dst, src, len); \
96	flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
97} while (0)
98
99#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
100do { \
101	flush_cache_page(vma, vaddr, page_to_pfn(page)); \
102	memcpy(dst, src, len); \
103} while (0)
104
105void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
106void flush_cache_range(struct vm_area_struct *vma,
107		unsigned long start, unsigned long end);
108
109/* defined in pacache.S exported in cache.c used by flush_anon_page */
110void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
111
112#define ARCH_HAS_FLUSH_ANON_PAGE
113static inline void
114flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
115{
116	if (PageAnon(page)) {
117		flush_tlb_page(vma, vmaddr);
118		preempt_disable();
119		flush_dcache_page_asm(page_to_phys(page), vmaddr);
120		preempt_enable();
121	}
122}
123
124#ifdef CONFIG_DEBUG_RODATA
125void mark_rodata_ro(void);
126#endif
127
128#include <asm/kmap_types.h>
129
130#define ARCH_HAS_KMAP
131
132static inline void *kmap(struct page *page)
133{
134	might_sleep();
135	return page_address(page);
136}
137
138static inline void kunmap(struct page *page)
139{
140	flush_kernel_dcache_page_addr(page_address(page));
141}
142
143static inline void *kmap_atomic(struct page *page)
144{
145	pagefault_disable();
146	return page_address(page);
147}
148
149static inline void __kunmap_atomic(void *addr)
150{
151	flush_kernel_dcache_page_addr(addr);
152	pagefault_enable();
153}
154
155#define kmap_atomic_prot(page, prot)	kmap_atomic(page)
156#define kmap_atomic_pfn(pfn)	kmap_atomic(pfn_to_page(pfn))
157#define kmap_atomic_to_page(ptr)	virt_to_page(ptr)
158
159#endif /* _PARISC_CACHEFLUSH_H */
160
161