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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
|
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Inline assembly cache operations.
*
* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
* Copyright (C) 1997 - 2002 Ralf Baechle (ralf@gnu.org)
* Copyright (C) 2004 Ralf Baechle (ralf@linux-mips.org)
*/
#ifndef _ASM_R4KCACHE_H
#define _ASM_R4KCACHE_H
#include <asm/asm.h>
#include <asm/cacheops.h>
#include <asm/cpu-features.h>
/*
* This macro return a properly sign-extended address suitable as base address
* for indexed cache operations. Two issues here:
*
* - The MIPS32 and MIPS64 specs permit an implementation to directly derive
* the index bits from the virtual address. This breaks with tradition
* set by the R4000. To keep unpleasant surprises from happening we pick
* an address in KSEG0 / CKSEG0.
* - We need a properly sign extended address for 64-bit code. To get away
* without ifdefs we let the compiler do it by a type cast.
*/
#define INDEX_BASE CKSEG0
#define cache_op(op,addr) \
__asm__ __volatile__( \
" .set push \n" \
" .set noreorder \n" \
" .set mips3\n\t \n" \
" cache %0, %1 \n" \
" .set pop \n" \
: \
: "i" (op), "R" (*(unsigned char *)(addr)))
static inline void flush_icache_line_indexed(unsigned long addr)
{
cache_op(Index_Invalidate_I, addr);
}
static inline void flush_dcache_line_indexed(unsigned long addr)
{
cache_op(Index_Writeback_Inv_D, addr);
}
static inline void flush_scache_line_indexed(unsigned long addr)
{
cache_op(Index_Writeback_Inv_SD, addr);
}
static inline void flush_icache_line(unsigned long addr)
{
cache_op(Hit_Invalidate_I, addr);
}
static inline void flush_dcache_line(unsigned long addr)
{
cache_op(Hit_Writeback_Inv_D, addr);
}
static inline void invalidate_dcache_line(unsigned long addr)
{
cache_op(Hit_Invalidate_D, addr);
}
static inline void invalidate_scache_line(unsigned long addr)
{
cache_op(Hit_Invalidate_SD, addr);
}
static inline void flush_scache_line(unsigned long addr)
{
cache_op(Hit_Writeback_Inv_SD, addr);
}
#define protected_cache_op(op,addr) \
__asm__ __volatile__( \
" .set push \n" \
" .set noreorder \n" \
" .set mips3 \n" \
"1: cache %0, (%1) \n" \
"2: .set pop \n" \
" .section __ex_table,\"a\" \n" \
" "STR(PTR)" 1b, 2b \n" \
" .previous" \
: \
: "i" (op), "r" (addr))
/*
* The next two are for badland addresses like signal trampolines.
*/
static inline void protected_flush_icache_line(unsigned long addr)
{
protected_cache_op(Hit_Invalidate_I, addr);
}
/*
* R10000 / R12000 hazard - these processors don't support the Hit_Writeback_D
* cacheop so we use Hit_Writeback_Inv_D which is supported by all R4000-style
* caches. We're talking about one cacheline unnecessarily getting invalidated
* here so the penalty isn't overly hard.
*/
static inline void protected_writeback_dcache_line(unsigned long addr)
{
protected_cache_op(Hit_Writeback_Inv_D, addr);
}
static inline void protected_writeback_scache_line(unsigned long addr)
{
protected_cache_op(Hit_Writeback_Inv_SD, addr);
}
/*
* This one is RM7000-specific
*/
static inline void invalidate_tcache_page(unsigned long addr)
{
cache_op(Page_Invalidate_T, addr);
}
#define cache16_unroll32(base,op) \
__asm__ __volatile__( \
" .set push \n" \
" .set noreorder \n" \
" .set mips3 \n" \
" cache %1, 0x000(%0); cache %1, 0x010(%0) \n" \
" cache %1, 0x020(%0); cache %1, 0x030(%0) \n" \
" cache %1, 0x040(%0); cache %1, 0x050(%0) \n" \
" cache %1, 0x060(%0); cache %1, 0x070(%0) \n" \
" cache %1, 0x080(%0); cache %1, 0x090(%0) \n" \
" cache %1, 0x0a0(%0); cache %1, 0x0b0(%0) \n" \
" cache %1, 0x0c0(%0); cache %1, 0x0d0(%0) \n" \
" cache %1, 0x0e0(%0); cache %1, 0x0f0(%0) \n" \
" cache %1, 0x100(%0); cache %1, 0x110(%0) \n" \
" cache %1, 0x120(%0); cache %1, 0x130(%0) \n" \
" cache %1, 0x140(%0); cache %1, 0x150(%0) \n" \
" cache %1, 0x160(%0); cache %1, 0x170(%0) \n" \
" cache %1, 0x180(%0); cache %1, 0x190(%0) \n" \
" cache %1, 0x1a0(%0); cache %1, 0x1b0(%0) \n" \
" cache %1, 0x1c0(%0); cache %1, 0x1d0(%0) \n" \
" cache %1, 0x1e0(%0); cache %1, 0x1f0(%0) \n" \
" .set pop \n" \
: \
: "r" (base), \
"i" (op));
#define cache32_unroll32(base,op) \
__asm__ __volatile__( \
" .set push \n" \
" .set noreorder \n" \
" .set mips3 \n" \
" cache %1, 0x000(%0); cache %1, 0x020(%0) \n" \
" cache %1, 0x040(%0); cache %1, 0x060(%0) \n" \
" cache %1, 0x080(%0); cache %1, 0x0a0(%0) \n" \
" cache %1, 0x0c0(%0); cache %1, 0x0e0(%0) \n" \
" cache %1, 0x100(%0); cache %1, 0x120(%0) \n" \
" cache %1, 0x140(%0); cache %1, 0x160(%0) \n" \
" cache %1, 0x180(%0); cache %1, 0x1a0(%0) \n" \
" cache %1, 0x1c0(%0); cache %1, 0x1e0(%0) \n" \
" cache %1, 0x200(%0); cache %1, 0x220(%0) \n" \
" cache %1, 0x240(%0); cache %1, 0x260(%0) \n" \
" cache %1, 0x280(%0); cache %1, 0x2a0(%0) \n" \
" cache %1, 0x2c0(%0); cache %1, 0x2e0(%0) \n" \
" cache %1, 0x300(%0); cache %1, 0x320(%0) \n" \
" cache %1, 0x340(%0); cache %1, 0x360(%0) \n" \
" cache %1, 0x380(%0); cache %1, 0x3a0(%0) \n" \
" cache %1, 0x3c0(%0); cache %1, 0x3e0(%0) \n" \
" .set pop \n" \
: \
: "r" (base), \
"i" (op));
#define cache64_unroll32(base,op) \
__asm__ __volatile__( \
" .set push \n" \
" .set noreorder \n" \
" .set mips3 \n" \
" cache %1, 0x000(%0); cache %1, 0x040(%0) \n" \
" cache %1, 0x080(%0); cache %1, 0x0c0(%0) \n" \
" cache %1, 0x100(%0); cache %1, 0x140(%0) \n" \
" cache %1, 0x180(%0); cache %1, 0x1c0(%0) \n" \
" cache %1, 0x200(%0); cache %1, 0x240(%0) \n" \
" cache %1, 0x280(%0); cache %1, 0x2c0(%0) \n" \
" cache %1, 0x300(%0); cache %1, 0x340(%0) \n" \
" cache %1, 0x380(%0); cache %1, 0x3c0(%0) \n" \
" cache %1, 0x400(%0); cache %1, 0x440(%0) \n" \
" cache %1, 0x480(%0); cache %1, 0x4c0(%0) \n" \
" cache %1, 0x500(%0); cache %1, 0x540(%0) \n" \
" cache %1, 0x580(%0); cache %1, 0x5c0(%0) \n" \
" cache %1, 0x600(%0); cache %1, 0x640(%0) \n" \
" cache %1, 0x680(%0); cache %1, 0x6c0(%0) \n" \
" cache %1, 0x700(%0); cache %1, 0x740(%0) \n" \
" cache %1, 0x780(%0); cache %1, 0x7c0(%0) \n" \
" .set pop \n" \
: \
: "r" (base), \
"i" (op));
#define cache128_unroll32(base,op) \
__asm__ __volatile__( \
" .set push \n" \
" .set noreorder \n" \
" .set mips3 \n" \
" cache %1, 0x000(%0); cache %1, 0x080(%0) \n" \
" cache %1, 0x100(%0); cache %1, 0x180(%0) \n" \
" cache %1, 0x200(%0); cache %1, 0x280(%0) \n" \
" cache %1, 0x300(%0); cache %1, 0x380(%0) \n" \
" cache %1, 0x400(%0); cache %1, 0x480(%0) \n" \
" cache %1, 0x500(%0); cache %1, 0x580(%0) \n" \
" cache %1, 0x600(%0); cache %1, 0x680(%0) \n" \
" cache %1, 0x700(%0); cache %1, 0x780(%0) \n" \
" cache %1, 0x800(%0); cache %1, 0x880(%0) \n" \
" cache %1, 0x900(%0); cache %1, 0x980(%0) \n" \
" cache %1, 0xa00(%0); cache %1, 0xa80(%0) \n" \
" cache %1, 0xb00(%0); cache %1, 0xb80(%0) \n" \
" cache %1, 0xc00(%0); cache %1, 0xc80(%0) \n" \
" cache %1, 0xd00(%0); cache %1, 0xd80(%0) \n" \
" cache %1, 0xe00(%0); cache %1, 0xe80(%0) \n" \
" cache %1, 0xf00(%0); cache %1, 0xf80(%0) \n" \
" .set pop \n" \
: \
: "r" (base), \
"i" (op));
/* build blast_xxx, blast_xxx_page, blast_xxx_page_indexed */
#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize) \
static inline void blast_##pfx##cache##lsize(void) \
{ \
unsigned long start = INDEX_BASE; \
unsigned long end = start + current_cpu_data.desc.waysize; \
unsigned long ws_inc = 1UL << current_cpu_data.desc.waybit; \
unsigned long ws_end = current_cpu_data.desc.ways << \
current_cpu_data.desc.waybit; \
unsigned long ws, addr; \
\
for (ws = 0; ws < ws_end; ws += ws_inc) \
for (addr = start; addr < end; addr += lsize * 32) \
cache##lsize##_unroll32(addr|ws,indexop); \
} \
\
static inline void blast_##pfx##cache##lsize##_page(unsigned long page) \
{ \
unsigned long start = page; \
unsigned long end = page + PAGE_SIZE; \
\
do { \
cache##lsize##_unroll32(start,hitop); \
start += lsize * 32; \
} while (start < end); \
} \
\
static inline void blast_##pfx##cache##lsize##_page_indexed(unsigned long page) \
{ \
unsigned long indexmask = current_cpu_data.desc.waysize - 1; \
unsigned long start = INDEX_BASE + (page & indexmask); \
unsigned long end = start + PAGE_SIZE; \
unsigned long ws_inc = 1UL << current_cpu_data.desc.waybit; \
unsigned long ws_end = current_cpu_data.desc.ways << \
current_cpu_data.desc.waybit; \
unsigned long ws, addr; \
\
for (ws = 0; ws < ws_end; ws += ws_inc) \
for (addr = start; addr < end; addr += lsize * 32) \
cache##lsize##_unroll32(addr|ws,indexop); \
}
__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16)
__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16)
__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16)
__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32)
__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32)
__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32)
__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64)
__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64)
__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128)
/* build blast_xxx_range, protected_blast_xxx_range */
#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot) \
static inline void prot##blast_##pfx##cache##_range(unsigned long start, \
unsigned long end) \
{ \
unsigned long lsize = cpu_##desc##_line_size(); \
unsigned long addr = start & ~(lsize - 1); \
unsigned long aend = (end - 1) & ~(lsize - 1); \
while (1) { \
prot##cache_op(hitop, addr); \
if (addr == aend) \
break; \
addr += lsize; \
} \
}
__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_)
__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_)
__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_)
__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, )
__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, )
/* blast_inv_dcache_range */
__BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D, )
#endif /* _ASM_R4KCACHE_H */
|
