Linux kernel mirror (for testing)
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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 purge_kernel_dcache_range_asm(unsigned long, unsigned long);
30void flush_kernel_dcache_page_asm(void *);
31void flush_kernel_icache_page(void *);
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
39void 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
45void flush_kernel_vmap_range(void *vaddr, int size);
46void 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
52void 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) \
68do { \
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) \
75do { \
76 flush_cache_page(vma, vaddr, page_to_pfn(page)); \
77 memcpy(dst, src, len); \
78} while (0)
79
80void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
81void 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 */
85void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
86
87#define ARCH_HAS_FLUSH_ANON_PAGE
88static inline void
89flush_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
100static inline void kunmap_flush_on_unmap(void *addr)
101{
102 flush_kernel_dcache_page_addr(addr);
103}
104
105#endif /* _PARISC_CACHEFLUSH_H */
106