1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _PARISC_CACHEFLUSH_H
3 #define _PARISC_CACHEFLUSH_H
4 
5 #include <linux/mm.h>
6 #include <linux/uaccess.h>
7 #include <asm/tlbflush.h>
8 
9 /* The usual comment is "Caches aren't brain-dead on the <architecture>".
10  * Unfortunately, that doesn't apply to PA-RISC. */
11 
12 /* Internal implementation */
13 void flush_data_cache_local(void *);  /* flushes local data-cache only */
14 void flush_instruction_cache_local(void *); /* flushes local code-cache only */
15 #ifdef CONFIG_SMP
16 void flush_data_cache(void); /* flushes data-cache only (all processors) */
17 void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
18 #else
19 #define flush_data_cache() flush_data_cache_local(NULL)
20 #define flush_instruction_cache() flush_instruction_cache_local(NULL)
21 #endif
22 
23 #define flush_cache_dup_mm(mm) flush_cache_mm(mm)
24 
25 void flush_user_icache_range_asm(unsigned long, unsigned long);
26 void flush_kernel_icache_range_asm(unsigned long, unsigned long);
27 void flush_user_dcache_range_asm(unsigned long, unsigned long);
28 void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
29 void flush_kernel_dcache_page_asm(void *);
30 void flush_kernel_icache_page(void *);
31 
32 /* Cache flush operations */
33 
34 void flush_cache_all_local(void);
35 void flush_cache_all(void);
36 void flush_cache_mm(struct mm_struct *mm);
37 
38 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
39 void flush_kernel_dcache_page_addr(void *addr);
40 static inline void flush_kernel_dcache_page(struct page *page)
41 {
42 	flush_kernel_dcache_page_addr(page_address(page));
43 }
44 
45 #define flush_kernel_dcache_range(start,size) \
46 	flush_kernel_dcache_range_asm((start), (start)+(size));
47 
48 void flush_kernel_vmap_range(void *vaddr, int size);
49 void invalidate_kernel_vmap_range(void *vaddr, int size);
50 
51 #define flush_cache_vmap(start, end)		flush_cache_all()
52 #define flush_cache_vunmap(start, end)		flush_cache_all()
53 
54 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
55 extern void flush_dcache_page(struct page *page);
56 
57 #define flush_dcache_mmap_lock(mapping) \
58 	spin_lock_irq(&(mapping)->tree_lock)
59 #define flush_dcache_mmap_unlock(mapping) \
60 	spin_unlock_irq(&(mapping)->tree_lock)
61 
62 #define flush_icache_page(vma,page)	do { 		\
63 	flush_kernel_dcache_page(page);			\
64 	flush_kernel_icache_page(page_address(page)); 	\
65 } while (0)
66 
67 #define flush_icache_range(s,e)		do { 		\
68 	flush_kernel_dcache_range_asm(s,e); 		\
69 	flush_kernel_icache_range_asm(s,e); 		\
70 } while (0)
71 
72 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
73 do { \
74 	flush_cache_page(vma, vaddr, page_to_pfn(page)); \
75 	memcpy(dst, src, len); \
76 	flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
77 } while (0)
78 
79 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
80 do { \
81 	flush_cache_page(vma, vaddr, page_to_pfn(page)); \
82 	memcpy(dst, src, len); \
83 } while (0)
84 
85 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
86 void flush_cache_range(struct vm_area_struct *vma,
87 		unsigned long start, unsigned long end);
88 
89 /* defined in pacache.S exported in cache.c used by flush_anon_page */
90 void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
91 
92 #define ARCH_HAS_FLUSH_ANON_PAGE
93 static inline void
94 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
95 {
96 	if (PageAnon(page)) {
97 		flush_tlb_page(vma, vmaddr);
98 		preempt_disable();
99 		flush_dcache_page_asm(page_to_phys(page), vmaddr);
100 		preempt_enable();
101 	}
102 }
103 
104 #include <asm/kmap_types.h>
105 
106 #define ARCH_HAS_KMAP
107 
108 static inline void *kmap(struct page *page)
109 {
110 	might_sleep();
111 	return page_address(page);
112 }
113 
114 static inline void kunmap(struct page *page)
115 {
116 	flush_kernel_dcache_page_addr(page_address(page));
117 }
118 
119 static inline void *kmap_atomic(struct page *page)
120 {
121 	preempt_disable();
122 	pagefault_disable();
123 	return page_address(page);
124 }
125 
126 static inline void __kunmap_atomic(void *addr)
127 {
128 	flush_kernel_dcache_page_addr(addr);
129 	pagefault_enable();
130 	preempt_enable();
131 }
132 
133 #define kmap_atomic_prot(page, prot)	kmap_atomic(page)
134 #define kmap_atomic_pfn(pfn)	kmap_atomic(pfn_to_page(pfn))
135 
136 #endif /* _PARISC_CACHEFLUSH_H */
137 
138