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		flush_dcache_page_asm(page_to_phys(page), vmaddr);
119	}
120}
121
122#ifdef CONFIG_DEBUG_RODATA
123void mark_rodata_ro(void);
124#endif
125
126#ifdef CONFIG_PA8X00
127/* Only pa8800, pa8900 needs this */
128
129#include <asm/kmap_types.h>
130
131#define ARCH_HAS_KMAP
132
133void kunmap_parisc(void *addr);
134
135static inline void *kmap(struct page *page)
136{
137	might_sleep();
138	return page_address(page);
139}
140
141#define kunmap(page)			kunmap_parisc(page_address(page))
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	kunmap_parisc(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#endif
159
160#endif /* _PARISC_CACHEFLUSH_H */
161