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 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
40 void flush_kernel_dcache_page_addr(void *addr);
flush_kernel_dcache_page(struct page * page)41 static 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
49 void flush_kernel_vmap_range(void *vaddr, int size);
50 void invalidate_kernel_vmap_range(void *vaddr, int size);
51
52 #define flush_cache_vmap(start, end) flush_cache_all()
53 #define flush_cache_vunmap(start, end) flush_cache_all()
54
55 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
56 extern void flush_dcache_page(struct page *page);
57
58 #define flush_dcache_mmap_lock(mapping) xa_lock_irq(&mapping->i_pages)
59 #define flush_dcache_mmap_unlock(mapping) xa_unlock_irq(&mapping->i_pages)
60
61 #define flush_icache_page(vma,page) do { \
62 flush_kernel_dcache_page(page); \
63 flush_kernel_icache_page(page_address(page)); \
64 } while (0)
65
66 #define flush_icache_range(s,e) do { \
67 flush_kernel_dcache_range_asm(s,e); \
68 flush_kernel_icache_range_asm(s,e); \
69 } while (0)
70
71 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
72 do { \
73 flush_cache_page(vma, vaddr, page_to_pfn(page)); \
74 memcpy(dst, src, len); \
75 flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
76 } while (0)
77
78 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
79 do { \
80 flush_cache_page(vma, vaddr, page_to_pfn(page)); \
81 memcpy(dst, src, len); \
82 } while (0)
83
84 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
85 void flush_cache_range(struct vm_area_struct *vma,
86 unsigned long start, unsigned long end);
87
88 /* defined in pacache.S exported in cache.c used by flush_anon_page */
89 void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
90
91 #define ARCH_HAS_FLUSH_ANON_PAGE
92 static inline void
flush_anon_page(struct vm_area_struct * vma,struct page * page,unsigned long vmaddr)93 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
94 {
95 if (PageAnon(page)) {
96 flush_tlb_page(vma, vmaddr);
97 preempt_disable();
98 flush_dcache_page_asm(page_to_phys(page), vmaddr);
99 preempt_enable();
100 }
101 }
102
103 #define ARCH_HAS_FLUSH_ON_KUNMAP
kunmap_flush_on_unmap(void * addr)104 static inline void kunmap_flush_on_unmap(void *addr)
105 {
106 flush_kernel_dcache_page_addr(addr);
107 }
108
109 #endif /* _PARISC_CACHEFLUSH_H */
110
111