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
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
|
/*
* include/asm-mips/mipsregs.h
*
* 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.
*
* Copyright (C) 1994, 1995, 1996, 1997 by Ralf Baechle
* Modified for further R[236]000 support by Paul M. Antoine, 1996.
*
* $Id: mipsregs.h,v 1.4 1997/09/20 19:02:46 root Exp $
*/
#ifndef __ASM_MIPS_MIPSREGS_H
#define __ASM_MIPS_MIPSREGS_H
#include <linux/linkage.h>
/*
* The following macros are especially useful for __asm__
* inline assembler.
*/
#ifndef __STR
#define __STR(x) #x
#endif
#ifndef STR
#define STR(x) __STR(x)
#endif
/*
* Coprocessor 0 register names
*/
#define CP0_INDEX $0
#define CP0_RANDOM $1
#define CP0_ENTRYLO0 $2
#define CP0_ENTRYLO1 $3
#define CP0_CONTEXT $4
#define CP0_PAGEMASK $5
#define CP0_WIRED $6
#define CP0_BADVADDR $8
#define CP0_COUNT $9
#define CP0_ENTRYHI $10
#define CP0_COMPARE $11
#define CP0_STATUS $12
#define CP0_CAUSE $13
#define CP0_EPC $14
#define CP0_PRID $15
#define CP0_CONFIG $16
#define CP0_LLADDR $17
#define CP0_WATCHLO $18
#define CP0_WATCHHI $19
#define CP0_XCONTEXT $20
#define CP0_FRAMEMASK $21
#define CP0_DIAGNOSTIC $22
#define CP0_PERFORMANCE $25
#define CP0_ECC $26
#define CP0_CACHEERR $27
#define CP0_TAGLO $28
#define CP0_TAGHI $29
#define CP0_ERROREPC $30
/*
* R4640/R4650 cp0 register names. These registers are listed
* here only for completeness; without MMU these CPUs are not useable
* by Linux. A future ELKS port might take make Linux run on them
* though ...
*/
#define CP0_IBASE $0
#define CP0_IBOUND $1
#define CP0_DBASE $2
#define CP0_DBOUND $3
#define CP0_CALG $17
#define CP0_IWATCH $18
#define CP0_DWATCH $19
/*
* Coprocessor 1 (FPU) register names
*/
#define CP1_REVISION $0
#define CP1_STATUS $31
/*
* Values for PageMask register
*/
#define PM_4K 0x00000000
#define PM_16K 0x00006000
#define PM_64K 0x0001e000
#define PM_256K 0x0007e000
#define PM_1M 0x001fe000
#define PM_4M 0x007fe000
#define PM_16M 0x01ffe000
/*
* Values used for computation of new tlb entries
*/
#define PL_4K 12
#define PL_16K 14
#define PL_64K 16
#define PL_256K 18
#define PL_1M 20
#define PL_4M 22
#define PL_16M 24
/*
* Macros to access the system control coprocessor
*/
#define read_32bit_cp0_register(source) \
({ int __res; \
__asm__ __volatile__( \
"mfc0\t%0,"STR(source) \
: "=r" (__res)); \
__res;})
/*
* For now use this only with interrupts disabled!
*/
#define read_64bit_cp0_register(source) \
({ int __res; \
__asm__ __volatile__( \
".set\tmips3\n\t" \
"dmfc0\t%0,"STR(source)"\n\t" \
".set\tmips0" \
: "=r" (__res)); \
__res;})
#define write_32bit_cp0_register(register,value) \
__asm__ __volatile__( \
"mtc0\t%0,"STR(register) \
: : "r" (value));
#define write_64bit_cp0_register(register,value) \
__asm__ __volatile__( \
".set\tmips3\n\t" \
"dmtc0\t%0,"STR(register)"\n\t" \
".set\tmips0" \
: : "r" (value))
/*
* R4x00 interrupt enable / cause bits
*/
#define IE_SW0 (1<< 8)
#define IE_SW1 (1<< 9)
#define IE_IRQ0 (1<<10)
#define IE_IRQ1 (1<<11)
#define IE_IRQ2 (1<<12)
#define IE_IRQ3 (1<<13)
#define IE_IRQ4 (1<<14)
#define IE_IRQ5 (1<<15)
/*
* R4x00 interrupt cause bits
*/
#define C_SW0 (1<< 8)
#define C_SW1 (1<< 9)
#define C_IRQ0 (1<<10)
#define C_IRQ1 (1<<11)
#define C_IRQ2 (1<<12)
#define C_IRQ3 (1<<13)
#define C_IRQ4 (1<<14)
#define C_IRQ5 (1<<15)
#ifndef __LANGUAGE_ASSEMBLY__
/*
* Manipulate the status register.
* Mostly used to access the interrupt bits.
*/
#define __BUILD_SET_CP0(name,register) \
extern __inline__ unsigned int \
set_cp0_##name(unsigned int change, unsigned int new) \
{ \
unsigned int res; \
\
res = read_32bit_cp0_register(register); \
res &= ~change; \
res |= (new & change); \
if(change) \
write_32bit_cp0_register(register, res); \
\
return res; \
}
__BUILD_SET_CP0(status,CP0_STATUS)
__BUILD_SET_CP0(cause,CP0_CAUSE)
__BUILD_SET_CP0(config,CP0_CONFIG)
#endif /* defined (__LANGUAGE_ASSEMBLY__) */
/*
* Inline code for use of the ll and sc instructions
*
* FIXME: This instruction is only available on MIPS ISA >=2.
* Since these operations are only being used for atomic operations
* the easiest workaround for the R[23]00 is to disable interrupts.
* This fails for R3000 SMP machines which use that many different
* technologies as replacement that it is difficult to create even
* just a hook for for all machines to hook into. The only good
* thing is that there is currently no R3000 SMP machine on the
* Linux/MIPS target list ...
*/
#define load_linked(addr) \
({ \
unsigned int __res; \
\
__asm__ __volatile__( \
"ll\t%0,(%1)" \
: "=r" (__res) \
: "r" ((unsigned long) (addr))); \
\
__res; \
})
#define store_conditional(addr,value) \
({ \
int __res; \
\
__asm__ __volatile__( \
"sc\t%0,(%2)" \
: "=r" (__res) \
: "0" (value), "r" (addr)); \
\
__res; \
})
/*
* Bitfields in the R4xx0 cp0 status register
*/
#define ST0_IE 0x00000001
#define ST0_EXL 0x00000002
#define ST0_ERL 0x00000004
#define ST0_KSU 0x00000018
# define KSU_USER 0x00000010
# define KSU_SUPERVISOR 0x00000008
# define KSU_KERNEL 0x00000000
#define ST0_UX 0x00000020
#define ST0_SX 0x00000040
#define ST0_KX 0x00000080
/*
* Bitfields in the R[23]000 cp0 status register.
*/
#define ST0_KUC 0x00000001
#define ST0_IEP 0x00000002
#define ST0_KUP 0x00000004
#define ST0_IEO 0x00000008
#define ST0_KUO 0x00000010
/* bits 6 & 7 are reserved on R[23]000 */
/*
* Bits specific to the R4640/R4650
*/
#define ST0_UM <1 << 4)
#define ST0_IL (1 << 23)
#define ST0_DL (1 << 24)
/*
* Status register bits available in all MIPS CPUs.
*/
#define ST0_IM 0x0000ff00
#define STATUSB_IP0 8
#define STATUSF_IP0 (1 << 8)
#define STATUSB_IP1 9
#define STATUSF_IP1 (1 << 9)
#define STATUSB_IP2 10
#define STATUSF_IP2 (1 << 10)
#define STATUSB_IP3 11
#define STATUSF_IP3 (1 << 11)
#define STATUSB_IP4 12
#define STATUSF_IP4 (1 << 12)
#define STATUSB_IP5 13
#define STATUSF_IP5 (1 << 13)
#define STATUSB_IP6 14
#define STATUSF_IP6 (1 << 14)
#define STATUSB_IP7 15
#define STATUSF_IP7 (1 << 15)
#define ST0_DE 0x00010000
#define ST0_CE 0x00020000
#define ST0_CH 0x00040000
#define ST0_SR 0x00100000
#define ST0_BEV 0x00400000
#define ST0_RE 0x02000000
#define ST0_FR 0x04000000
#define ST0_CU 0xf0000000
#define ST0_CU0 0x10000000
#define ST0_CU1 0x20000000
#define ST0_CU2 0x40000000
#define ST0_CU3 0x80000000
#define ST0_XX 0x80000000 /* MIPS IV naming */
/*
* Bitfields and bit numbers in the coprocessor 0 cause register.
*
* Refer to to your MIPS R4xx0 manual, chapter 5 for explanation.
*/
#define CAUSEB_EXCCODE 2
#define CAUSEF_EXCCODE (31 << 2)
#define CAUSEB_IP 8
#define CAUSEF_IP (255 << 8)
#define CAUSEB_IP0 8
#define CAUSEF_IP0 (1 << 8)
#define CAUSEB_IP1 9
#define CAUSEF_IP1 (1 << 9)
#define CAUSEB_IP2 10
#define CAUSEF_IP2 (1 << 10)
#define CAUSEB_IP3 11
#define CAUSEF_IP3 (1 << 11)
#define CAUSEB_IP4 12
#define CAUSEF_IP4 (1 << 12)
#define CAUSEB_IP5 13
#define CAUSEF_IP5 (1 << 13)
#define CAUSEB_IP6 14
#define CAUSEF_IP6 (1 << 14)
#define CAUSEB_IP7 15
#define CAUSEF_IP7 (1 << 15)
#define CAUSEB_IV 23
#define CAUSEF_IV (1 << 23)
#define CAUSEB_CE 28
#define CAUSEF_CE (3 << 28)
#define CAUSEB_BD 31
#define CAUSEF_BD (1 << 31)
/*
* Bits in the coprozessor 0 config register.
*/
#define CONFIG_CM_CACHABLE_NO_WA 0
#define CONFIG_CM_CACHABLE_WA 1
#define CONFIG_CM_UNCACHED 2
#define CONFIG_CM_CACHABLE_NONCOHERENT 3
#define CONFIG_CM_CACHABLE_CE 4
#define CONFIG_CM_CACHABLE_COW 5
#define CONFIG_CM_CACHABLE_CUW 6
#define CONFIG_CM_CACHABLE_ACCELERATED 7
#define CONFIG_CM_CMASK 7
#define CONFIG_DB (1 << 4)
#define CONFIG_IB (1 << 5)
#define CONFIG_SC (1 << 17)
/*
* R10000 performance counter definitions.
*
* FIXME: The R10000 performance counter opens a nice way to implement CPU
* time accounting with a precission of one cycle. I don't have
* R10000 silicon but just a manual, so ...
*/
/*
* Events counted by counter #0
*/
#define CE0_CYCLES 0
#define CE0_INSN_ISSUED 1
#define CE0_LPSC_ISSUED 2
#define CE0_S_ISSUED 3
#define CE0_SC_ISSUED 4
#define CE0_SC_FAILED 5
#define CE0_BRANCH_DECODED 6
#define CE0_QW_WB_SECONDARY 7
#define CE0_CORRECTED_ECC_ERRORS 8
#define CE0_ICACHE_MISSES 9
#define CE0_SCACHE_I_MISSES 10
#define CE0_SCACHE_I_WAY_MISSPREDICTED 11
#define CE0_EXT_INTERVENTIONS_REQ 12
#define CE0_EXT_INVALIDATE_REQ 13
#define CE0_VIRTUAL_COHERENCY_COND 14
#define CE0_INSN_GRADUATED 15
/*
* Events counted by counter #1
*/
#define CE1_CYCLES 0
#define CE1_INSN_GRADUATED 1
#define CE1_LPSC_GRADUATED 2
#define CE1_S_GRADUATED 3
#define CE1_SC_GRADUATED 4
#define CE1_FP_INSN_GRADUATED 5
#define CE1_QW_WB_PRIMARY 6
#define CE1_TLB_REFILL 7
#define CE1_BRANCH_MISSPREDICTED 8
#define CE1_DCACHE_MISS 9
#define CE1_SCACHE_D_MISSES 10
#define CE1_SCACHE_D_WAY_MISSPREDICTED 11
#define CE1_EXT_INTERVENTION_HITS 12
#define CE1_EXT_INVALIDATE_REQ 13
#define CE1_SP_HINT_TO_CEXCL_SC_BLOCKS 14
#define CE1_SP_HINT_TO_SHARED_SC_BLOCKS 15
/*
* These flags define in which priviledge mode the counters count events
*/
#define CEB_USER 8 /* Count events in user mode, EXL = ERL = 0 */
#define CEB_SUPERVISOR 4 /* Count events in supvervisor mode EXL = ERL = 0 */
#define CEB_KERNEL 2 /* Count events in kernel mode EXL = ERL = 0 */
#define CEB_EXL 1 /* Count events with EXL = 1, ERL = 0 */
#ifndef __LANGUAGE_ASSEMBLY__
/*
* Functions to access the performance counter and control registers
*/
extern asmlinkage unsigned int read_perf_cntr(unsigned int counter);
extern asmlinkage void write_perf_cntr(unsigned int counter, unsigned int val);
extern asmlinkage unsigned int read_perf_cntl(unsigned int counter);
extern asmlinkage void write_perf_cntl(unsigned int counter, unsigned int val);
#endif
#endif /* __ASM_MIPS_MIPSREGS_H */
|
