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1#include <linux/mm.h>
2#include <asm/mmu_context.h>
3#include <asm/cache_insns.h>
4#include <asm/cacheflush.h>
5#include <asm/traps.h>
6
7/*
8 * Write back the dirty D-caches, but not invalidate them.
9 *
10 * START: Virtual Address (U0, P1, or P3)
11 * SIZE: Size of the region.
12 */
13static void sh4__flush_wback_region(void *start, int size)
14{
15 reg_size_t aligned_start, v, cnt, end;
16
17 aligned_start = register_align(start);
18 v = aligned_start & ~(L1_CACHE_BYTES-1);
19 end = (aligned_start + size + L1_CACHE_BYTES-1)
20 & ~(L1_CACHE_BYTES-1);
21 cnt = (end - v) / L1_CACHE_BYTES;
22
23 while (cnt >= 8) {
24 __ocbwb(v); v += L1_CACHE_BYTES;
25 __ocbwb(v); v += L1_CACHE_BYTES;
26 __ocbwb(v); v += L1_CACHE_BYTES;
27 __ocbwb(v); v += L1_CACHE_BYTES;
28 __ocbwb(v); v += L1_CACHE_BYTES;
29 __ocbwb(v); v += L1_CACHE_BYTES;
30 __ocbwb(v); v += L1_CACHE_BYTES;
31 __ocbwb(v); v += L1_CACHE_BYTES;
32 cnt -= 8;
33 }
34
35 while (cnt) {
36 __ocbwb(v); v += L1_CACHE_BYTES;
37 cnt--;
38 }
39}
40
41/*
42 * Write back the dirty D-caches and invalidate them.
43 *
44 * START: Virtual Address (U0, P1, or P3)
45 * SIZE: Size of the region.
46 */
47static void sh4__flush_purge_region(void *start, int size)
48{
49 reg_size_t aligned_start, v, cnt, end;
50
51 aligned_start = register_align(start);
52 v = aligned_start & ~(L1_CACHE_BYTES-1);
53 end = (aligned_start + size + L1_CACHE_BYTES-1)
54 & ~(L1_CACHE_BYTES-1);
55 cnt = (end - v) / L1_CACHE_BYTES;
56
57 while (cnt >= 8) {
58 __ocbp(v); v += L1_CACHE_BYTES;
59 __ocbp(v); v += L1_CACHE_BYTES;
60 __ocbp(v); v += L1_CACHE_BYTES;
61 __ocbp(v); v += L1_CACHE_BYTES;
62 __ocbp(v); v += L1_CACHE_BYTES;
63 __ocbp(v); v += L1_CACHE_BYTES;
64 __ocbp(v); v += L1_CACHE_BYTES;
65 __ocbp(v); v += L1_CACHE_BYTES;
66 cnt -= 8;
67 }
68 while (cnt) {
69 __ocbp(v); v += L1_CACHE_BYTES;
70 cnt--;
71 }
72}
73
74/*
75 * No write back please
76 */
77static void sh4__flush_invalidate_region(void *start, int size)
78{
79 reg_size_t aligned_start, v, cnt, end;
80
81 aligned_start = register_align(start);
82 v = aligned_start & ~(L1_CACHE_BYTES-1);
83 end = (aligned_start + size + L1_CACHE_BYTES-1)
84 & ~(L1_CACHE_BYTES-1);
85 cnt = (end - v) / L1_CACHE_BYTES;
86
87 while (cnt >= 8) {
88 __ocbi(v); v += L1_CACHE_BYTES;
89 __ocbi(v); v += L1_CACHE_BYTES;
90 __ocbi(v); v += L1_CACHE_BYTES;
91 __ocbi(v); v += L1_CACHE_BYTES;
92 __ocbi(v); v += L1_CACHE_BYTES;
93 __ocbi(v); v += L1_CACHE_BYTES;
94 __ocbi(v); v += L1_CACHE_BYTES;
95 __ocbi(v); v += L1_CACHE_BYTES;
96 cnt -= 8;
97 }
98
99 while (cnt) {
100 __ocbi(v); v += L1_CACHE_BYTES;
101 cnt--;
102 }
103}
104
105void __init sh4__flush_region_init(void)
106{
107 __flush_wback_region = sh4__flush_wback_region;
108 __flush_invalidate_region = sh4__flush_invalidate_region;
109 __flush_purge_region = sh4__flush_purge_region;
110}
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/mm.h>
3#include <asm/mmu_context.h>
4#include <asm/cache_insns.h>
5#include <asm/cacheflush.h>
6#include <asm/traps.h>
7
8/*
9 * Write back the dirty D-caches, but not invalidate them.
10 *
11 * START: Virtual Address (U0, P1, or P3)
12 * SIZE: Size of the region.
13 */
14static void sh4__flush_wback_region(void *start, int size)
15{
16 reg_size_t aligned_start, v, cnt, end;
17
18 aligned_start = register_align(start);
19 v = aligned_start & ~(L1_CACHE_BYTES-1);
20 end = (aligned_start + size + L1_CACHE_BYTES-1)
21 & ~(L1_CACHE_BYTES-1);
22 cnt = (end - v) / L1_CACHE_BYTES;
23
24 while (cnt >= 8) {
25 __ocbwb(v); v += L1_CACHE_BYTES;
26 __ocbwb(v); v += L1_CACHE_BYTES;
27 __ocbwb(v); v += L1_CACHE_BYTES;
28 __ocbwb(v); v += L1_CACHE_BYTES;
29 __ocbwb(v); v += L1_CACHE_BYTES;
30 __ocbwb(v); v += L1_CACHE_BYTES;
31 __ocbwb(v); v += L1_CACHE_BYTES;
32 __ocbwb(v); v += L1_CACHE_BYTES;
33 cnt -= 8;
34 }
35
36 while (cnt) {
37 __ocbwb(v); v += L1_CACHE_BYTES;
38 cnt--;
39 }
40}
41
42/*
43 * Write back the dirty D-caches and invalidate them.
44 *
45 * START: Virtual Address (U0, P1, or P3)
46 * SIZE: Size of the region.
47 */
48static void sh4__flush_purge_region(void *start, int size)
49{
50 reg_size_t aligned_start, v, cnt, end;
51
52 aligned_start = register_align(start);
53 v = aligned_start & ~(L1_CACHE_BYTES-1);
54 end = (aligned_start + size + L1_CACHE_BYTES-1)
55 & ~(L1_CACHE_BYTES-1);
56 cnt = (end - v) / L1_CACHE_BYTES;
57
58 while (cnt >= 8) {
59 __ocbp(v); v += L1_CACHE_BYTES;
60 __ocbp(v); v += L1_CACHE_BYTES;
61 __ocbp(v); v += L1_CACHE_BYTES;
62 __ocbp(v); v += L1_CACHE_BYTES;
63 __ocbp(v); v += L1_CACHE_BYTES;
64 __ocbp(v); v += L1_CACHE_BYTES;
65 __ocbp(v); v += L1_CACHE_BYTES;
66 __ocbp(v); v += L1_CACHE_BYTES;
67 cnt -= 8;
68 }
69 while (cnt) {
70 __ocbp(v); v += L1_CACHE_BYTES;
71 cnt--;
72 }
73}
74
75/*
76 * No write back please
77 */
78static void sh4__flush_invalidate_region(void *start, int size)
79{
80 reg_size_t aligned_start, v, cnt, end;
81
82 aligned_start = register_align(start);
83 v = aligned_start & ~(L1_CACHE_BYTES-1);
84 end = (aligned_start + size + L1_CACHE_BYTES-1)
85 & ~(L1_CACHE_BYTES-1);
86 cnt = (end - v) / L1_CACHE_BYTES;
87
88 while (cnt >= 8) {
89 __ocbi(v); v += L1_CACHE_BYTES;
90 __ocbi(v); v += L1_CACHE_BYTES;
91 __ocbi(v); v += L1_CACHE_BYTES;
92 __ocbi(v); v += L1_CACHE_BYTES;
93 __ocbi(v); v += L1_CACHE_BYTES;
94 __ocbi(v); v += L1_CACHE_BYTES;
95 __ocbi(v); v += L1_CACHE_BYTES;
96 __ocbi(v); v += L1_CACHE_BYTES;
97 cnt -= 8;
98 }
99
100 while (cnt) {
101 __ocbi(v); v += L1_CACHE_BYTES;
102 cnt--;
103 }
104}
105
106void __init sh4__flush_region_init(void)
107{
108 __flush_wback_region = sh4__flush_wback_region;
109 __flush_invalidate_region = sh4__flush_invalidate_region;
110 __flush_purge_region = sh4__flush_purge_region;
111}