Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 */
13void flush_data_cache_local(void *); /* flushes local data-cache only */
14void flush_instruction_cache_local(void *); /* flushes local code-cache only */
15#ifdef CONFIG_SMP
16void flush_data_cache(void); /* flushes data-cache only (all processors) */
17void 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
25void flush_user_icache_range_asm(unsigned long, unsigned long);
26void flush_kernel_icache_range_asm(unsigned long, unsigned long);
27void flush_user_dcache_range_asm(unsigned long, unsigned long);
28void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
29void flush_kernel_dcache_page_asm(void *);
30void flush_kernel_icache_page(void *);
31
32/* Cache flush operations */
33
34void flush_cache_all_local(void);
35void flush_cache_all(void);
36void flush_cache_mm(struct mm_struct *mm);
37
38#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
39void flush_kernel_dcache_page_addr(void *addr);
40static 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
48void flush_kernel_vmap_range(void *vaddr, int size);
49void 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
55extern 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) \
73do { \
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) \
80do { \
81 flush_cache_page(vma, vaddr, page_to_pfn(page)); \
82 memcpy(dst, src, len); \
83} while (0)
84
85void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
86void 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 */
90void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
91
92#define ARCH_HAS_FLUSH_ANON_PAGE
93static inline void
94flush_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
108static inline void *kmap(struct page *page)
109{
110 might_sleep();
111 return page_address(page);
112}
113
114static inline void kunmap(struct page *page)
115{
116 flush_kernel_dcache_page_addr(page_address(page));
117}
118
119static inline void *kmap_atomic(struct page *page)
120{
121 preempt_disable();
122 pagefault_disable();
123 return page_address(page);
124}
125
126static 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