blob: 9f1fe80cc8473663b8a5556ab82b3cda592d91a8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/syscalls.h>
#include <linux/spinlock.h>
#include <asm/page.h>
#include <asm/cache.h>
#include <asm/cacheflush.h>
#include <asm/cachectl.h>
#define PG_dcache_clean PG_arch_1
void flush_dcache_page(struct page *page)
{
struct address_space *mapping;
if (page == ZERO_PAGE(0))
return;
mapping = page_mapping_file(page);
if (mapping && !page_mapcount(page))
clear_bit(PG_dcache_clean, &page->flags);
else {
dcache_wbinv_all();
if (mapping)
icache_inv_all();
set_bit(PG_dcache_clean, &page->flags);
}
}
EXPORT_SYMBOL(flush_dcache_page);
void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
pte_t *ptep)
{
unsigned long pfn = pte_pfn(*ptep);
struct page *page;
if (!pfn_valid(pfn))
return;
page = pfn_to_page(pfn);
if (page == ZERO_PAGE(0))
return;
if (!test_and_set_bit(PG_dcache_clean, &page->flags))
dcache_wbinv_all();
if (page_mapping_file(page)) {
if (vma->vm_flags & VM_EXEC)
icache_inv_all();
}
}
void flush_kernel_dcache_page(struct page *page)
{
struct address_space *mapping;
mapping = page_mapping_file(page);
if (!mapping || mapping_mapped(mapping))
dcache_wbinv_all();
}
EXPORT_SYMBOL(flush_kernel_dcache_page);
void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
dcache_wbinv_all();
if (vma->vm_flags & VM_EXEC)
icache_inv_all();
}
|
