summaryrefslogtreecommitdiffstats
path: root/arch/mips/include/asm/mips-cm.h
blob: d75b75e78ebb4749355f95a1709202b9f2d069af (plain)
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
402
403
404
405
406
407
408
/*
 * Copyright (C) 2013 Imagination Technologies
 * Author: Paul Burton <paul.burton@imgtec.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#ifndef __MIPS_ASM_MIPS_CM_H__
#define __MIPS_ASM_MIPS_CM_H__

#include <linux/errno.h>
#include <linux/io.h>
#include <linux/types.h>

/* The base address of the CM GCR block */
extern void __iomem *mips_cm_base;

/* The base address of the CM L2-only sync region */
extern void __iomem *mips_cm_l2sync_base;

/**
 * __mips_cm_phys_base - retrieve the physical base address of the CM
 *
 * This function returns the physical base address of the Coherence Manager
 * global control block, or 0 if no Coherence Manager is present. It provides
 * a default implementation which reads the CMGCRBase register where available,
 * and may be overriden by platforms which determine this address in a
 * different way by defining a function with the same prototype except for the
 * name mips_cm_phys_base (without underscores).
 */
extern phys_addr_t __mips_cm_phys_base(void);

/*
 * mips_cm_is64 - determine CM register width
 *
 * The CM register width is processor and CM specific. A 64-bit processor
 * usually has a 64-bit CM and a 32-bit one has a 32-bit CM but a 64-bit
 * processor could come with a 32-bit CM. Moreover, accesses on 64-bit CMs
 * can be done either using regular 64-bit load/store instructions, or 32-bit
 * load/store instruction on 32-bit register pairs. We opt for using 64-bit
 * accesses on 64-bit CMs and kernels and 32-bit in any other case.
 *
 * It's set to 0 for 32-bit accesses and 1 for 64-bit accesses.
 */
extern int mips_cm_is64;

/**
 * mips_cm_error_report - Report CM cache errors
 */
#ifdef CONFIG_MIPS_CM
extern void mips_cm_error_report(void);
#else
static inline void mips_cm_error_report(void) {}
#endif

/**
 * mips_cm_probe - probe for a Coherence Manager
 *
 * Attempt to detect the presence of a Coherence Manager. Returns 0 if a CM
 * is successfully detected, else -errno.
 */
#ifdef CONFIG_MIPS_CM
extern int mips_cm_probe(void);
#else
static inline int mips_cm_probe(void)
{
	return -ENODEV;
}
#endif

/**
 * mips_cm_present - determine whether a Coherence Manager is present
 *
 * Returns true if a CM is present in the system, else false.
 */
static inline bool mips_cm_present(void)
{
#ifdef CONFIG_MIPS_CM
	return mips_cm_base != NULL;
#else
	return false;
#endif
}

/**
 * mips_cm_has_l2sync - determine whether an L2-only sync region is present
 *
 * Returns true if the system implements an L2-only sync region, else false.
 */
static inline bool mips_cm_has_l2sync(void)
{
#ifdef CONFIG_MIPS_CM
	return mips_cm_l2sync_base != NULL;
#else
	return false;
#endif
}

/* Offsets to register blocks from the CM base address */
#define MIPS_CM_GCB_OFS		0x0000 /* Global Control Block */
#define MIPS_CM_CLCB_OFS	0x2000 /* Core Local Control Block */
#define MIPS_CM_COCB_OFS	0x4000 /* Core Other Control Block */
#define MIPS_CM_GDB_OFS		0x6000 /* Global Debug Block */

/* Total size of the CM memory mapped registers */
#define MIPS_CM_GCR_SIZE	0x8000

/* Size of the L2-only sync region */
#define MIPS_CM_L2SYNC_SIZE	0x1000

/* Macros to ease the creation of register access functions */
#define BUILD_CM_R_(name, off)					\
static inline unsigned long __iomem *addr_gcr_##name(void)	\
{								\
	return (unsigned long __iomem *)(mips_cm_base + (off));	\
}								\
								\
static inline u32 read32_gcr_##name(void)			\
{								\
	return __raw_readl(addr_gcr_##name());			\
}								\
								\
static inline u64 read64_gcr_##name(void)			\
{								\
	return __raw_readq(addr_gcr_##name());			\
}								\
								\
static inline unsigned long read_gcr_##name(void)		\
{								\
	if (mips_cm_is64)					\
		return read64_gcr_##name();			\
	else							\
		return read32_gcr_##name();			\
}

#define BUILD_CM__W(name, off)					\
static inline void write32_gcr_##name(u32 value)		\
{								\
	__raw_writel(value, addr_gcr_##name());			\
}								\
								\
static inline void write64_gcr_##name(u64 value)		\
{								\
	__raw_writeq(value, addr_gcr_##name());			\
}								\
								\
static inline void write_gcr_##name(unsigned long value)	\
{								\
	if (mips_cm_is64)					\
		write64_gcr_##name(value);			\
	else							\
		write32_gcr_##name(value);			\
}

#define BUILD_CM_RW(name, off)					\
	BUILD_CM_R_(name, off)					\
	BUILD_CM__W(name, off)

#define BUILD_CM_Cx_R_(name, off)				\
	BUILD_CM_R_(cl_##name, MIPS_CM_CLCB_OFS + (off))	\
	BUILD_CM_R_(co_##name, MIPS_CM_COCB_OFS + (off))

#define BUILD_CM_Cx__W(name, off)				\
	BUILD_CM__W(cl_##name, MIPS_CM_CLCB_OFS + (off))	\
	BUILD_CM__W(co_##name, MIPS_CM_COCB_OFS + (off))

#define BUILD_CM_Cx_RW(name, off)				\
	BUILD_CM_Cx_R_(name, off)				\
	BUILD_CM_Cx__W(name, off)

/* GCB register accessor functions */
BUILD_CM_R_(config,		MIPS_CM_GCB_OFS + 0x00)
BUILD_CM_RW(base,		MIPS_CM_GCB_OFS + 0x08)
BUILD_CM_RW(access,		MIPS_CM_GCB_OFS + 0x20)
BUILD_CM_R_(rev,		MIPS_CM_GCB_OFS + 0x30)
BUILD_CM_RW(error_mask,		MIPS_CM_GCB_OFS + 0x40)
BUILD_CM_RW(error_cause,	MIPS_CM_GCB_OFS + 0x48)
BUILD_CM_RW(error_addr,		MIPS_CM_GCB_OFS + 0x50)
BUILD_CM_RW(error_mult,		MIPS_CM_GCB_OFS + 0x58)
BUILD_CM_RW(l2_only_sync_base,	MIPS_CM_GCB_OFS + 0x70)
BUILD_CM_RW(gic_base,		MIPS_CM_GCB_OFS + 0x80)
BUILD_CM_RW(cpc_base,		MIPS_CM_GCB_OFS + 0x88)
BUILD_CM_RW(reg0_base,		MIPS_CM_GCB_OFS + 0x90)
BUILD_CM_RW(reg0_mask,		MIPS_CM_GCB_OFS + 0x98)
BUILD_CM_RW(reg1_base,		MIPS_CM_GCB_OFS + 0xa0)
BUILD_CM_RW(reg1_mask,		MIPS_CM_GCB_OFS + 0xa8)
BUILD_CM_RW(reg2_base,		MIPS_CM_GCB_OFS + 0xb0)
BUILD_CM_RW(reg2_mask,		MIPS_CM_GCB_OFS + 0xb8)
BUILD_CM_RW(reg3_base,		MIPS_CM_GCB_OFS + 0xc0)
BUILD_CM_RW(reg3_mask,		MIPS_CM_GCB_OFS + 0xc8)
BUILD_CM_R_(gic_status,		MIPS_CM_GCB_OFS + 0xd0)
BUILD_CM_R_(cpc_status,		MIPS_CM_GCB_OFS + 0xf0)
BUILD_CM_RW(l2_config,		MIPS_CM_GCB_OFS + 0x130)

/* Core Local & Core Other register accessor functions */
BUILD_CM_Cx_RW(reset_release,	0x00)
BUILD_CM_Cx_RW(coherence,	0x08)
BUILD_CM_Cx_R_(config,		0x10)
BUILD_CM_Cx_RW(other,		0x18)
BUILD_CM_Cx_RW(reset_base,	0x20)
BUILD_CM_Cx_R_(id,		0x28)
BUILD_CM_Cx_RW(reset_ext_base,	0x30)
BUILD_CM_Cx_R_(tcid_0_priority,	0x40)
BUILD_CM_Cx_R_(tcid_1_priority,	0x48)
BUILD_CM_Cx_R_(tcid_2_priority,	0x50)
BUILD_CM_Cx_R_(tcid_3_priority,	0x58)
BUILD_CM_Cx_R_(tcid_4_priority,	0x60)
BUILD_CM_Cx_R_(tcid_5_priority,	0x68)
BUILD_CM_Cx_R_(tcid_6_priority,	0x70)
BUILD_CM_Cx_R_(tcid_7_priority,	0x78)
BUILD_CM_Cx_R_(tcid_8_priority,	0x80)

/* GCR_CONFIG register fields */
#define CM_GCR_CONFIG_NUMIOCU_SHF		8
#define CM_GCR_CONFIG_NUMIOCU_MSK		(_ULCAST_(0xf) << 8)
#define CM_GCR_CONFIG_PCORES_SHF		0
#define CM_GCR_CONFIG_PCORES_MSK		(_ULCAST_(0xff) << 0)

/* GCR_BASE register fields */
#define CM_GCR_BASE_GCRBASE_SHF			15
#define CM_GCR_BASE_GCRBASE_MSK			(_ULCAST_(0x1ffff) << 15)
#define CM_GCR_BASE_CMDEFTGT_SHF		0
#define CM_GCR_BASE_CMDEFTGT_MSK		(_ULCAST_(0x3) << 0)
#define  CM_GCR_BASE_CMDEFTGT_DISABLED		0
#define  CM_GCR_BASE_CMDEFTGT_MEM		1
#define  CM_GCR_BASE_CMDEFTGT_IOCU0		2
#define  CM_GCR_BASE_CMDEFTGT_IOCU1		3

/* GCR_ACCESS register fields */
#define CM_GCR_ACCESS_ACCESSEN_SHF		0
#define CM_GCR_ACCESS_ACCESSEN_MSK		(_ULCAST_(0xff) << 0)

/* GCR_REV register fields */
#define CM_GCR_REV_MAJOR_SHF			8
#define CM_GCR_REV_MAJOR_MSK			(_ULCAST_(0xff) << 8)
#define CM_GCR_REV_MINOR_SHF			0
#define CM_GCR_REV_MINOR_MSK			(_ULCAST_(0xff) << 0)

#define CM_ENCODE_REV(major, minor) \
		(((major) << CM_GCR_REV_MAJOR_SHF) | \
		 ((minor) << CM_GCR_REV_MINOR_SHF))

#define CM_REV_CM2				CM_ENCODE_REV(6, 0)
#define CM_REV_CM3				CM_ENCODE_REV(8, 0)

/* GCR_ERROR_CAUSE register fields */
#define CM_GCR_ERROR_CAUSE_ERRTYPE_SHF		27
#define CM_GCR_ERROR_CAUSE_ERRTYPE_MSK		(_ULCAST_(0x1f) << 27)
#define CM_GCR_ERROR_CAUSE_ERRINFO_SHF		0
#define CM_GCR_ERROR_CAUSE_ERRINGO_MSK		(_ULCAST_(0x7ffffff) << 0)

/* GCR_ERROR_MULT register fields */
#define CM_GCR_ERROR_MULT_ERR2ND_SHF		0
#define CM_GCR_ERROR_MULT_ERR2ND_MSK		(_ULCAST_(0x1f) << 0)

/* GCR_L2_ONLY_SYNC_BASE register fields */
#define CM_GCR_L2_ONLY_SYNC_BASE_SYNCBASE_SHF	12
#define CM_GCR_L2_ONLY_SYNC_BASE_SYNCBASE_MSK	(_ULCAST_(0xfffff) << 12)
#define CM_GCR_L2_ONLY_SYNC_BASE_SYNCEN_SHF	0
#define CM_GCR_L2_ONLY_SYNC_BASE_SYNCEN_MSK	(_ULCAST_(0x1) << 0)

/* GCR_GIC_BASE register fields */
#define CM_GCR_GIC_BASE_GICBASE_SHF		17
#define CM_GCR_GIC_BASE_GICBASE_MSK		(_ULCAST_(0x7fff) << 17)
#define CM_GCR_GIC_BASE_GICEN_SHF		0
#define CM_GCR_GIC_BASE_GICEN_MSK		(_ULCAST_(0x1) << 0)

/* GCR_CPC_BASE register fields */
#define CM_GCR_CPC_BASE_CPCBASE_SHF		17
#define CM_GCR_CPC_BASE_CPCBASE_MSK		(_ULCAST_(0x7fff) << 17)
#define CM_GCR_CPC_BASE_CPCEN_SHF		0
#define CM_GCR_CPC_BASE_CPCEN_MSK		(_ULCAST_(0x1) << 0)

/* GCR_GIC_STATUS register fields */
#define CM_GCR_GIC_STATUS_GICEX_SHF		0
#define CM_GCR_GIC_STATUS_GICEX_MSK		(_ULCAST_(0x1) << 0)

/* GCR_REGn_BASE register fields */
#define CM_GCR_REGn_BASE_BASEADDR_SHF		16
#define CM_GCR_REGn_BASE_BASEADDR_MSK		(_ULCAST_(0xffff) << 16)

/* GCR_REGn_MASK register fields */
#define CM_GCR_REGn_MASK_ADDRMASK_SHF		16
#define CM_GCR_REGn_MASK_ADDRMASK_MSK		(_ULCAST_(0xffff) << 16)
#define CM_GCR_REGn_MASK_CCAOVR_SHF		5
#define CM_GCR_REGn_MASK_CCAOVR_MSK		(_ULCAST_(0x3) << 5)
#define CM_GCR_REGn_MASK_CCAOVREN_SHF		4
#define CM_GCR_REGn_MASK_CCAOVREN_MSK		(_ULCAST_(0x1) << 4)
#define CM_GCR_REGn_MASK_DROPL2_SHF		2
#define CM_GCR_REGn_MASK_DROPL2_MSK		(_ULCAST_(0x1) << 2)
#define CM_GCR_REGn_MASK_CMTGT_SHF		0
#define CM_GCR_REGn_MASK_CMTGT_MSK		(_ULCAST_(0x3) << 0)
#define  CM_GCR_REGn_MASK_CMTGT_DISABLED	(_ULCAST_(0x0) << 0)
#define  CM_GCR_REGn_MASK_CMTGT_MEM		(_ULCAST_(0x1) << 0)
#define  CM_GCR_REGn_MASK_CMTGT_IOCU0		(_ULCAST_(0x2) << 0)
#define  CM_GCR_REGn_MASK_CMTGT_IOCU1		(_ULCAST_(0x3) << 0)

/* GCR_GIC_STATUS register fields */
#define CM_GCR_GIC_STATUS_EX_SHF		0
#define CM_GCR_GIC_STATUS_EX_MSK		(_ULCAST_(0x1) << 0)

/* GCR_CPC_STATUS register fields */
#define CM_GCR_CPC_STATUS_EX_SHF		0
#define CM_GCR_CPC_STATUS_EX_MSK		(_ULCAST_(0x1) << 0)

/* GCR_L2_CONFIG register fields */
#define CM_GCR_L2_CONFIG_BYPASS_SHF		20
#define CM_GCR_L2_CONFIG_BYPASS_MSK		(_ULCAST_(0x1) << 20)
#define CM_GCR_L2_CONFIG_SET_SIZE_SHF		12
#define CM_GCR_L2_CONFIG_SET_SIZE_MSK		(_ULCAST_(0xf) << 12)
#define CM_GCR_L2_CONFIG_LINE_SIZE_SHF		8
#define CM_GCR_L2_CONFIG_LINE_SIZE_MSK		(_ULCAST_(0xf) << 8)
#define CM_GCR_L2_CONFIG_ASSOC_SHF		0
#define CM_GCR_L2_CONFIG_ASSOC_MSK		(_ULCAST_(0xff) << 0)

/* GCR_Cx_COHERENCE register fields */
#define CM_GCR_Cx_COHERENCE_COHDOMAINEN_SHF	0
#define CM_GCR_Cx_COHERENCE_COHDOMAINEN_MSK	(_ULCAST_(0xff) << 0)

/* GCR_Cx_CONFIG register fields */
#define CM_GCR_Cx_CONFIG_IOCUTYPE_SHF		10
#define CM_GCR_Cx_CONFIG_IOCUTYPE_MSK		(_ULCAST_(0x3) << 10)
#define CM_GCR_Cx_CONFIG_PVPE_SHF		0
#define CM_GCR_Cx_CONFIG_PVPE_MSK		(_ULCAST_(0x1ff) << 0)

/* GCR_Cx_OTHER register fields */
#define CM_GCR_Cx_OTHER_CORENUM_SHF		16
#define CM_GCR_Cx_OTHER_CORENUM_MSK		(_ULCAST_(0xffff) << 16)

/* GCR_Cx_RESET_BASE register fields */
#define CM_GCR_Cx_RESET_BASE_BEVEXCBASE_SHF	12
#define CM_GCR_Cx_RESET_BASE_BEVEXCBASE_MSK	(_ULCAST_(0xfffff) << 12)

/* GCR_Cx_RESET_EXT_BASE register fields */
#define CM_GCR_Cx_RESET_EXT_BASE_EVARESET_SHF	31
#define CM_GCR_Cx_RESET_EXT_BASE_EVARESET_MSK	(_ULCAST_(0x1) << 31)
#define CM_GCR_Cx_RESET_EXT_BASE_UEB_SHF	30
#define CM_GCR_Cx_RESET_EXT_BASE_UEB_MSK	(_ULCAST_(0x1) << 30)
#define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCMASK_SHF	20
#define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCMASK_MSK	(_ULCAST_(0xff) << 20)
#define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCPA_SHF	1
#define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCPA_MSK	(_ULCAST_(0x7f) << 1)
#define CM_GCR_Cx_RESET_EXT_BASE_PRESENT_SHF	0
#define CM_GCR_Cx_RESET_EXT_BASE_PRESENT_MSK	(_ULCAST_(0x1) << 0)

/**
 * mips_cm_numcores - return the number of cores present in the system
 *
 * Returns the value of the PCORES field of the GCR_CONFIG register plus 1, or
 * zero if no Coherence Manager is present.
 */
static inline unsigned mips_cm_numcores(void)
{
	if (!mips_cm_present())
		return 0;

	return ((read_gcr_config() & CM_GCR_CONFIG_PCORES_MSK)
		>> CM_GCR_CONFIG_PCORES_SHF) + 1;
}

/**
 * mips_cm_numiocu - return the number of IOCUs present in the system
 *
 * Returns the value of the NUMIOCU field of the GCR_CONFIG register, or zero
 * if no Coherence Manager is present.
 */
static inline unsigned mips_cm_numiocu(void)
{
	if (!mips_cm_present())
		return 0;

	return (read_gcr_config() & CM_GCR_CONFIG_NUMIOCU_MSK)
		>> CM_GCR_CONFIG_NUMIOCU_SHF;
}

/**
 * mips_cm_l2sync - perform an L2-only sync operation
 *
 * If an L2-only sync region is present in the system then this function
 * performs and L2-only sync and returns zero. Otherwise it returns -ENODEV.
 */
static inline int mips_cm_l2sync(void)
{
	if (!mips_cm_has_l2sync())
		return -ENODEV;

	writel(0, mips_cm_l2sync_base);
	return 0;
}

/**
 * mips_cm_revision() - return CM revision
 *
 * Return: The revision of the CM, from GCR_REV, or 0 if no CM is present. The
 * return value should be checked against the CM_REV_* macros.
 */
static inline int mips_cm_revision(void)
{
	if (!mips_cm_present())
		return 0;

	return read_gcr_rev();
}

#endif /* __MIPS_ASM_MIPS_CM_H__ */
OpenPOWER on IntegriCloud