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 purge_kernel_dcache_range_asm(unsigned long, unsigned long);
30 void flush_kernel_dcache_page_asm(void *);
31 void flush_kernel_icache_page(void *);
32
33 /* Cache flush operations */
34
35 void flush_cache_all_local(void);
36 void flush_cache_all(void);
37 void flush_cache_mm(struct mm_struct *mm);
38
39 void flush_kernel_dcache_page_addr(void *addr);
40
41 #define flush_kernel_dcache_range(start,size) \
42 flush_kernel_dcache_range_asm((start), (start)+(size));
43
44 #define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1
45 void flush_kernel_vmap_range(void *vaddr, int size);
46 void invalidate_kernel_vmap_range(void *vaddr, int size);
47
48 #define flush_cache_vmap(start, end) flush_cache_all()
49 #define flush_cache_vunmap(start, end) flush_cache_all()
50
51 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
52 void flush_dcache_page(struct page *page);
53
54 #define flush_dcache_mmap_lock(mapping) xa_lock_irq(&mapping->i_pages)
55 #define flush_dcache_mmap_unlock(mapping) xa_unlock_irq(&mapping->i_pages)
56
57 #define flush_icache_page(vma,page) do { \
58 flush_kernel_dcache_page_addr(page_address(page)); \
59 flush_kernel_icache_page(page_address(page)); \
60 } while (0)
61
62 #define flush_icache_range(s,e) do { \
63 flush_kernel_dcache_range_asm(s,e); \
64 flush_kernel_icache_range_asm(s,e); \
65 } while (0)
66
67 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
68 do { \
69 flush_cache_page(vma, vaddr, page_to_pfn(page)); \
70 memcpy(dst, src, len); \
71 flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
72 } while (0)
73
74 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
75 do { \
76 flush_cache_page(vma, vaddr, page_to_pfn(page)); \
77 memcpy(dst, src, len); \
78 } while (0)
79
80 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
81 void flush_cache_range(struct vm_area_struct *vma,
82 unsigned long start, unsigned long end);
83
84 /* defined in pacache.S exported in cache.c used by flush_anon_page */
85 void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
86
87 #define ARCH_HAS_FLUSH_ANON_PAGE
88 static inline void
flush_anon_page(struct vm_area_struct * vma,struct page * page,unsigned long vmaddr)89 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
90 {
91 if (PageAnon(page)) {
92 flush_tlb_page(vma, vmaddr);
93 preempt_disable();
94 flush_dcache_page_asm(page_to_phys(page), vmaddr);
95 preempt_enable();
96 }
97 }
98
99 #define ARCH_HAS_FLUSH_ON_KUNMAP
kunmap_flush_on_unmap(void * addr)100 static inline void kunmap_flush_on_unmap(void *addr)
101 {
102 flush_kernel_dcache_page_addr(addr);
103 }
104
105 #endif /* _PARISC_CACHEFLUSH_H */
106
107