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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
#include <linux/mm.h>
#include <asm/mmu_context.h>
#include <asm/cache_insns.h>
#include <asm/cacheflush.h>
#include <asm/traps.h>
/*
* Write back the dirty D-caches, but not invalidate them.
*
* START: Virtual Address (U0, P1, or P3)
* SIZE: Size of the region.
*/
static void sh4__flush_wback_region(void *start, int size)
{
reg_size_t aligned_start, v, cnt, end;
aligned_start = register_align(start);
v = aligned_start & ~(L1_CACHE_BYTES-1);
end = (aligned_start + size + L1_CACHE_BYTES-1)
& ~(L1_CACHE_BYTES-1);
cnt = (end - v) / L1_CACHE_BYTES;
while (cnt >= 8) {
__ocbwb(v); v += L1_CACHE_BYTES;
__ocbwb(v); v += L1_CACHE_BYTES;
__ocbwb(v); v += L1_CACHE_BYTES;
__ocbwb(v); v += L1_CACHE_BYTES;
__ocbwb(v); v += L1_CACHE_BYTES;
__ocbwb(v); v += L1_CACHE_BYTES;
__ocbwb(v); v += L1_CACHE_BYTES;
__ocbwb(v); v += L1_CACHE_BYTES;
cnt -= 8;
}
while (cnt) {
__ocbwb(v); v += L1_CACHE_BYTES;
cnt--;
}
}
/*
* Write back the dirty D-caches and invalidate them.
*
* START: Virtual Address (U0, P1, or P3)
* SIZE: Size of the region.
*/
static void sh4__flush_purge_region(void *start, int size)
{
reg_size_t aligned_start, v, cnt, end;
aligned_start = register_align(start);
v = aligned_start & ~(L1_CACHE_BYTES-1);
end = (aligned_start + size + L1_CACHE_BYTES-1)
& ~(L1_CACHE_BYTES-1);
cnt = (end - v) / L1_CACHE_BYTES;
while (cnt >= 8) {
__ocbp(v); v += L1_CACHE_BYTES;
__ocbp(v); v += L1_CACHE_BYTES;
__ocbp(v); v += L1_CACHE_BYTES;
__ocbp(v); v += L1_CACHE_BYTES;
__ocbp(v); v += L1_CACHE_BYTES;
__ocbp(v); v += L1_CACHE_BYTES;
__ocbp(v); v += L1_CACHE_BYTES;
__ocbp(v); v += L1_CACHE_BYTES;
cnt -= 8;
}
while (cnt) {
__ocbp(v); v += L1_CACHE_BYTES;
cnt--;
}
}
/*
* No write back please
*/
static void sh4__flush_invalidate_region(void *start, int size)
{
reg_size_t aligned_start, v, cnt, end;
aligned_start = register_align(start);
v = aligned_start & ~(L1_CACHE_BYTES-1);
end = (aligned_start + size + L1_CACHE_BYTES-1)
& ~(L1_CACHE_BYTES-1);
cnt = (end - v) / L1_CACHE_BYTES;
while (cnt >= 8) {
__ocbi(v); v += L1_CACHE_BYTES;
__ocbi(v); v += L1_CACHE_BYTES;
__ocbi(v); v += L1_CACHE_BYTES;
__ocbi(v); v += L1_CACHE_BYTES;
__ocbi(v); v += L1_CACHE_BYTES;
__ocbi(v); v += L1_CACHE_BYTES;
__ocbi(v); v += L1_CACHE_BYTES;
__ocbi(v); v += L1_CACHE_BYTES;
cnt -= 8;
}
while (cnt) {
__ocbi(v); v += L1_CACHE_BYTES;
cnt--;
}
}
void __init sh4__flush_region_init(void)
{
__flush_wback_region = sh4__flush_wback_region;
__flush_invalidate_region = sh4__flush_invalidate_region;
__flush_purge_region = sh4__flush_purge_region;
}
|
