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d113fcd9 | 1 | /* cache.h: Cache specific code for the Sparc. These include flushing |
1da177e4 LT |
2 | * and direct tag/data line access. |
3 | * | |
d113fcd9 | 4 | * Copyright (C) 1995, 2007 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
5 | */ |
6 | ||
7 | #ifndef _SPARC_CACHE_H | |
8 | #define _SPARC_CACHE_H | |
9 | ||
1da177e4 LT |
10 | #define L1_CACHE_SHIFT 5 |
11 | #define L1_CACHE_BYTES 32 | |
12 | #define L1_CACHE_ALIGN(x) ((((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))) | |
1da177e4 | 13 | |
d113fcd9 DM |
14 | #ifdef CONFIG_SPARC32 |
15 | #define SMP_CACHE_BYTES_SHIFT 5 | |
16 | #else | |
17 | #define SMP_CACHE_BYTES_SHIFT 6 | |
18 | #endif | |
19 | ||
20 | #define SMP_CACHE_BYTES (1 << SMP_CACHE_BYTES_SHIFT) | |
21 | ||
22 | #define __read_mostly __attribute__((__section__(".data.read_mostly"))) | |
23 | ||
24 | #ifdef CONFIG_SPARC32 | |
25 | #include <asm/asi.h> | |
1da177e4 LT |
26 | |
27 | /* Direct access to the instruction cache is provided through and | |
28 | * alternate address space. The IDC bit must be off in the ICCR on | |
29 | * HyperSparcs for these accesses to work. The code below does not do | |
30 | * any checking, the caller must do so. These routines are for | |
31 | * diagnostics only, but could end up being useful. Use with care. | |
32 | * Also, you are asking for trouble if you execute these in one of the | |
33 | * three instructions following a %asr/%psr access or modification. | |
34 | */ | |
35 | ||
36 | /* First, cache-tag access. */ | |
3115624e | 37 | static inline unsigned int get_icache_tag(int setnum, int tagnum) |
1da177e4 LT |
38 | { |
39 | unsigned int vaddr, retval; | |
40 | ||
41 | vaddr = ((setnum&1) << 12) | ((tagnum&0x7f) << 5); | |
42 | __asm__ __volatile__("lda [%1] %2, %0\n\t" : | |
43 | "=r" (retval) : | |
44 | "r" (vaddr), "i" (ASI_M_TXTC_TAG)); | |
45 | return retval; | |
46 | } | |
47 | ||
3115624e | 48 | static inline void put_icache_tag(int setnum, int tagnum, unsigned int entry) |
1da177e4 LT |
49 | { |
50 | unsigned int vaddr; | |
51 | ||
52 | vaddr = ((setnum&1) << 12) | ((tagnum&0x7f) << 5); | |
53 | __asm__ __volatile__("sta %0, [%1] %2\n\t" : : | |
54 | "r" (entry), "r" (vaddr), "i" (ASI_M_TXTC_TAG) : | |
55 | "memory"); | |
56 | } | |
57 | ||
58 | /* Second cache-data access. The data is returned two-32bit quantities | |
59 | * at a time. | |
60 | */ | |
3115624e | 61 | static inline void get_icache_data(int setnum, int tagnum, int subblock, |
1da177e4 LT |
62 | unsigned int *data) |
63 | { | |
64 | unsigned int value1, value2, vaddr; | |
65 | ||
66 | vaddr = ((setnum&0x1) << 12) | ((tagnum&0x7f) << 5) | | |
67 | ((subblock&0x3) << 3); | |
68 | __asm__ __volatile__("ldda [%2] %3, %%g2\n\t" | |
69 | "or %%g0, %%g2, %0\n\t" | |
70 | "or %%g0, %%g3, %1\n\t" : | |
71 | "=r" (value1), "=r" (value2) : | |
72 | "r" (vaddr), "i" (ASI_M_TXTC_DATA) : | |
73 | "g2", "g3"); | |
74 | data[0] = value1; data[1] = value2; | |
75 | } | |
76 | ||
3115624e | 77 | static inline void put_icache_data(int setnum, int tagnum, int subblock, |
1da177e4 LT |
78 | unsigned int *data) |
79 | { | |
80 | unsigned int value1, value2, vaddr; | |
81 | ||
82 | vaddr = ((setnum&0x1) << 12) | ((tagnum&0x7f) << 5) | | |
83 | ((subblock&0x3) << 3); | |
84 | value1 = data[0]; value2 = data[1]; | |
85 | __asm__ __volatile__("or %%g0, %0, %%g2\n\t" | |
86 | "or %%g0, %1, %%g3\n\t" | |
87 | "stda %%g2, [%2] %3\n\t" : : | |
88 | "r" (value1), "r" (value2), | |
89 | "r" (vaddr), "i" (ASI_M_TXTC_DATA) : | |
90 | "g2", "g3", "memory" /* no joke */); | |
91 | } | |
92 | ||
93 | /* Different types of flushes with the ICACHE. Some of the flushes | |
94 | * affect both the ICACHE and the external cache. Others only clear | |
95 | * the ICACHE entries on the cpu itself. V8's (most) allow | |
96 | * granularity of flushes on the packet (element in line), whole line, | |
97 | * and entire cache (ie. all lines) level. The ICACHE only flushes are | |
98 | * ROSS HyperSparc specific and are in ross.h | |
99 | */ | |
100 | ||
101 | /* Flushes which clear out both the on-chip and external caches */ | |
3115624e | 102 | static inline void flush_ei_page(unsigned int addr) |
1da177e4 LT |
103 | { |
104 | __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : : | |
105 | "r" (addr), "i" (ASI_M_FLUSH_PAGE) : | |
106 | "memory"); | |
107 | } | |
108 | ||
3115624e | 109 | static inline void flush_ei_seg(unsigned int addr) |
1da177e4 LT |
110 | { |
111 | __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : : | |
112 | "r" (addr), "i" (ASI_M_FLUSH_SEG) : | |
113 | "memory"); | |
114 | } | |
115 | ||
3115624e | 116 | static inline void flush_ei_region(unsigned int addr) |
1da177e4 LT |
117 | { |
118 | __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : : | |
119 | "r" (addr), "i" (ASI_M_FLUSH_REGION) : | |
120 | "memory"); | |
121 | } | |
122 | ||
3115624e | 123 | static inline void flush_ei_ctx(unsigned int addr) |
1da177e4 LT |
124 | { |
125 | __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : : | |
126 | "r" (addr), "i" (ASI_M_FLUSH_CTX) : | |
127 | "memory"); | |
128 | } | |
129 | ||
3115624e | 130 | static inline void flush_ei_user(unsigned int addr) |
1da177e4 LT |
131 | { |
132 | __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : : | |
133 | "r" (addr), "i" (ASI_M_FLUSH_USER) : | |
134 | "memory"); | |
135 | } | |
d113fcd9 | 136 | #endif /* CONFIG_SPARC32 */ |
1da177e4 LT |
137 | |
138 | #endif /* !(_SPARC_CACHE_H) */ |