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review.evervolv.com / android_kernel_htc_msm8960 / b69416b51be0757c82f1c5a0a3f0995a4484dab4 / . / arch / sh / mm / cache-sh2a.c
blob: 62c0c5f351205f6155eb7ede183f25951322f667 [file] [log] [blame]
Yoshinori Satocce2d452008-08-04 16:33:47 +0900[diff] [blame]1/*
2 * arch/sh/mm/cache-sh2a.c
3 *
4 * Copyright (C) 2008 Yoshinori Sato
5 *
6 * Released under the terms of the GNU GPL v2.0.
7 */
8
9#include <linux/init.h>
10#include <linux/mm.h>
11
12#include <asm/cache.h>
13#include <asm/addrspace.h>
14#include <asm/processor.h>
15#include <asm/cacheflush.h>
16#include <asm/io.h>
17
18void __flush_wback_region(void *start, int size)
19{
20 unsigned long v;
21 unsigned long begin, end;
22 unsigned long flags;
23
24 begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
25 end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
26 & ~(L1_CACHE_BYTES-1);
27
28 local_irq_save(flags);
29 jump_to_uncached();
30
31 for (v = begin; v < end; v+=L1_CACHE_BYTES) {
32 unsigned long addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x000007f0);
33 int way;
34 for (way = 0; way < 4; way++) {
35 unsigned long data = ctrl_inl(addr | (way << 11));
36 if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
37 data &= ~SH_CACHE_UPDATED;
38 ctrl_outl(data, addr | (way << 11));
39 }
40 }
41 }
42
43 back_to_cached();
44 local_irq_restore(flags);
45}
46
47void __flush_purge_region(void *start, int size)
48{
49 unsigned long v;
50 unsigned long begin, end;
51 unsigned long flags;
52
53 begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
54 end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
55 & ~(L1_CACHE_BYTES-1);
56
57 local_irq_save(flags);
58 jump_to_uncached();
59
60 for (v = begin; v < end; v+=L1_CACHE_BYTES) {
61 ctrl_outl((v & CACHE_PHYSADDR_MASK),
62 CACHE_OC_ADDRESS_ARRAY | (v & 0x000003f0) | 0x00000008);
63 }
64 back_to_cached();
65 local_irq_restore(flags);
66}
67
68void __flush_invalidate_region(void *start, int size)
69{
70 unsigned long v;
71 unsigned long begin, end;
72 unsigned long flags;
73
74 begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
75 end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
76 & ~(L1_CACHE_BYTES-1);
77 local_irq_save(flags);
78 jump_to_uncached();
79
80#ifdef CONFIG_CACHE_WRITEBACK
81 ctrl_outl(ctrl_inl(CCR) | CCR_OCACHE_INVALIDATE, CCR);
82 /* I-cache invalidate */
83 for (v = begin; v < end; v+=L1_CACHE_BYTES) {
84 ctrl_outl((v & CACHE_PHYSADDR_MASK),
85 CACHE_IC_ADDRESS_ARRAY | (v & 0x000003f0) | 0x00000008);
86 }
87#else
88 for (v = begin; v < end; v+=L1_CACHE_BYTES) {
89 ctrl_outl((v & CACHE_PHYSADDR_MASK),
90 CACHE_IC_ADDRESS_ARRAY | (v & 0x000003f0) | 0x00000008);
91 ctrl_outl((v & CACHE_PHYSADDR_MASK),
92 CACHE_OC_ADDRESS_ARRAY | (v & 0x000003f0) | 0x00000008);
93 }
94#endif
95 back_to_cached();
96 local_irq_restore(flags);
97}
98
99/* WBack O-Cache and flush I-Cache */
100void flush_icache_range(unsigned long start, unsigned long end)
101{
102 unsigned long v;
103 unsigned long flags;
104
105 start = start & ~(L1_CACHE_BYTES-1);
106 end = (end + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1);
107
108 local_irq_save(flags);
109 jump_to_uncached();
110
111 for (v = start; v < end; v+=L1_CACHE_BYTES) {
112 unsigned long addr = (v & 0x000007f0);
113 int way;
114 /* O-Cache writeback */
115 for (way = 0; way < 4; way++) {
116 unsigned long data = ctrl_inl(CACHE_OC_ADDRESS_ARRAY | addr | (way << 11));
117 if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
118 data &= ~SH_CACHE_UPDATED;
119 ctrl_outl(data, CACHE_OC_ADDRESS_ARRAY | addr | (way << 11));
120 }
121 }
122 /* I-Cache invalidate */
123 ctrl_outl(addr,
124 CACHE_IC_ADDRESS_ARRAY | addr | 0x00000008);
125 }
126
127 back_to_cached();
128 local_irq_restore(flags);
129}