summaryrefslogtreecommitdiffstats
path: root/arch/mips/include/asm/octeon/cvmx.h
blob: 19e139c9f33791f883046d5e3dcf2c2f76504359 (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
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
/***********************license start***************
 * Author: Cavium Networks
 *
 * Contact: support@caviumnetworks.com
 * This file is part of the OCTEON SDK
 *
 * Copyright (c) 2003-2008 Cavium Networks
 *
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, Version 2, as
 * published by the Free Software Foundation.
 *
 * This file is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this file; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 * or visit http://www.gnu.org/licenses/.
 *
 * This file may also be available under a different license from Cavium.
 * Contact Cavium Networks for more information
 ***********************license end**************************************/

#ifndef __CVMX_H__
#define __CVMX_H__

#include <linux/kernel.h>
#include <linux/string.h>

enum cvmx_mips_space {
	CVMX_MIPS_SPACE_XKSEG = 3LL,
	CVMX_MIPS_SPACE_XKPHYS = 2LL,
	CVMX_MIPS_SPACE_XSSEG = 1LL,
	CVMX_MIPS_SPACE_XUSEG = 0LL
};

/* These macros for use when using 32 bit pointers. */
#define CVMX_MIPS32_SPACE_KSEG0 1l
#define CVMX_ADD_SEG32(segment, add) \
	(((int32_t)segment << 31) | (int32_t)(add))

#define CVMX_IO_SEG CVMX_MIPS_SPACE_XKPHYS

/* These macros simplify the process of creating common IO addresses */
#define CVMX_ADD_SEG(segment, add) \
	((((uint64_t)segment) << 62) | (add))
#ifndef CVMX_ADD_IO_SEG
#define CVMX_ADD_IO_SEG(add) CVMX_ADD_SEG(CVMX_IO_SEG, (add))
#endif

#include <asm/octeon/cvmx-asm.h>
#include <asm/octeon/cvmx-packet.h>
#include <asm/octeon/cvmx-sysinfo.h>

#include <asm/octeon/cvmx-ciu-defs.h>
#include <asm/octeon/cvmx-gpio-defs.h>
#include <asm/octeon/cvmx-iob-defs.h>
#include <asm/octeon/cvmx-ipd-defs.h>
#include <asm/octeon/cvmx-l2c-defs.h>
#include <asm/octeon/cvmx-l2d-defs.h>
#include <asm/octeon/cvmx-l2t-defs.h>
#include <asm/octeon/cvmx-led-defs.h>
#include <asm/octeon/cvmx-mio-defs.h>
#include <asm/octeon/cvmx-pow-defs.h>

#include <asm/octeon/cvmx-bootinfo.h>
#include <asm/octeon/cvmx-bootmem.h>
#include <asm/octeon/cvmx-l2c.h>

#ifndef CVMX_ENABLE_DEBUG_PRINTS
#define CVMX_ENABLE_DEBUG_PRINTS 1
#endif

#if CVMX_ENABLE_DEBUG_PRINTS
#define cvmx_dprintf	    printk
#else
#define cvmx_dprintf(...)   {}
#endif

#define CVMX_MAX_CORES		(16)
#define CVMX_CACHE_LINE_SIZE	(128)	/* In bytes */
#define CVMX_CACHE_LINE_MASK	(CVMX_CACHE_LINE_SIZE - 1)	/* In bytes */
#define CVMX_CACHE_LINE_ALIGNED __attribute__ ((aligned(CVMX_CACHE_LINE_SIZE)))
#define CAST64(v) ((long long)(long)(v))
#define CASTPTR(type, v) ((type *)(long)(v))

/*
 * Returns processor ID, different Linux and simple exec versions
 * provided in the cvmx-app-init*.c files.
 */
static inline uint32_t cvmx_get_proc_id(void) __attribute__ ((pure));
static inline uint32_t cvmx_get_proc_id(void)
{
	uint32_t id;
	asm("mfc0 %0, $15,0" : "=r"(id));
	return id;
}

/* turn the variable name into a string */
#define CVMX_TMP_STR(x) CVMX_TMP_STR2(x)
#define CVMX_TMP_STR2(x) #x

/**
 * Builds a bit mask given the required size in bits.
 *
 * @bits:   Number of bits in the mask
 * Returns The mask
 */ static inline uint64_t cvmx_build_mask(uint64_t bits)
{
	return ~((~0x0ull) << bits);
}

/**
 * Builds a memory address for I/O based on the Major and Sub DID.
 *
 * @major_did: 5 bit major did
 * @sub_did:   3 bit sub did
 * Returns I/O base address
 */
static inline uint64_t cvmx_build_io_address(uint64_t major_did,
					     uint64_t sub_did)
{
	return (0x1ull << 48) | (major_did << 43) | (sub_did << 40);
}

/**
 * Perform mask and shift to place the supplied value into
 * the supplied bit rage.
 *
 * Example: cvmx_build_bits(39,24,value)
 * <pre>
 * 6	   5	   4	   3	   3	   2	   1
 * 3	   5	   7	   9	   1	   3	   5	   7	  0
 * +-------+-------+-------+-------+-------+-------+-------+------+
 * 000000000000000000000000___________value000000000000000000000000
 * </pre>
 *
 * @high_bit: Highest bit value can occupy (inclusive) 0-63
 * @low_bit:  Lowest bit value can occupy inclusive 0-high_bit
 * @value:    Value to use
 * Returns Value masked and shifted
 */
static inline uint64_t cvmx_build_bits(uint64_t high_bit,
				       uint64_t low_bit, uint64_t value)
{
	return (value & cvmx_build_mask(high_bit - low_bit + 1)) << low_bit;
}

/**
 * Convert a memory pointer (void*) into a hardware compatible
 * memory address (uint64_t). Octeon hardware widgets don't
 * understand logical addresses.
 *
 * @ptr:    C style memory pointer
 * Returns Hardware physical address
 */
static inline uint64_t cvmx_ptr_to_phys(void *ptr)
{
	if (sizeof(void *) == 8) {
		/*
		 * We're running in 64 bit mode. Normally this means
		 * that we can use 40 bits of address space (the
		 * hardware limit). Unfortunately there is one case
		 * were we need to limit this to 30 bits, sign
		 * extended 32 bit. Although these are 64 bits wide,
		 * only 30 bits can be used.
		 */
		if ((CAST64(ptr) >> 62) == 3)
			return CAST64(ptr) & cvmx_build_mask(30);
		else
			return CAST64(ptr) & cvmx_build_mask(40);
	} else {
		return (long)(ptr) & 0x1fffffff;
	}
}

/**
 * Convert a hardware physical address (uint64_t) into a
 * memory pointer (void *).
 *
 * @physical_address:
 *		 Hardware physical address to memory
 * Returns Pointer to memory
 */
static inline void *cvmx_phys_to_ptr(uint64_t physical_address)
{
	if (sizeof(void *) == 8) {
		/* Just set the top bit, avoiding any TLB uglyness */
		return CASTPTR(void,
			       CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
					    physical_address));
	} else {
		return CASTPTR(void,
			       CVMX_ADD_SEG32(CVMX_MIPS32_SPACE_KSEG0,
					      physical_address));
	}
}

/* The following #if controls the definition of the macro
    CVMX_BUILD_WRITE64. This macro is used to build a store operation to
    a full 64bit address. With a 64bit ABI, this can be done with a simple
    pointer access. 32bit ABIs require more complicated assembly */

/* We have a full 64bit ABI. Writing to a 64bit address can be done with
    a simple volatile pointer */
#define CVMX_BUILD_WRITE64(TYPE, ST)					\
static inline void cvmx_write64_##TYPE(uint64_t addr, TYPE##_t val)	\
{									\
    *CASTPTR(volatile TYPE##_t, addr) = val;				\
}


/* The following #if controls the definition of the macro
    CVMX_BUILD_READ64. This macro is used to build a load operation from
    a full 64bit address. With a 64bit ABI, this can be done with a simple
    pointer access. 32bit ABIs require more complicated assembly */

/* We have a full 64bit ABI. Writing to a 64bit address can be done with
    a simple volatile pointer */
#define CVMX_BUILD_READ64(TYPE, LT)					\
static inline TYPE##_t cvmx_read64_##TYPE(uint64_t addr)		\
{									\
	return *CASTPTR(volatile TYPE##_t, addr);			\
}


/* The following defines 8 functions for writing to a 64bit address. Each
    takes two arguments, the address and the value to write.
    cvmx_write64_int64	    cvmx_write64_uint64
    cvmx_write64_int32	    cvmx_write64_uint32
    cvmx_write64_int16	    cvmx_write64_uint16
    cvmx_write64_int8	    cvmx_write64_uint8 */
CVMX_BUILD_WRITE64(int64, "sd");
CVMX_BUILD_WRITE64(int32, "sw");
CVMX_BUILD_WRITE64(int16, "sh");
CVMX_BUILD_WRITE64(int8, "sb");
CVMX_BUILD_WRITE64(uint64, "sd");
CVMX_BUILD_WRITE64(uint32, "sw");
CVMX_BUILD_WRITE64(uint16, "sh");
CVMX_BUILD_WRITE64(uint8, "sb");
#define cvmx_write64 cvmx_write64_uint64

/* The following defines 8 functions for reading from a 64bit address. Each
    takes the address as the only argument
    cvmx_read64_int64	    cvmx_read64_uint64
    cvmx_read64_int32	    cvmx_read64_uint32
    cvmx_read64_int16	    cvmx_read64_uint16
    cvmx_read64_int8	    cvmx_read64_uint8 */
CVMX_BUILD_READ64(int64, "ld");
CVMX_BUILD_READ64(int32, "lw");
CVMX_BUILD_READ64(int16, "lh");
CVMX_BUILD_READ64(int8, "lb");
CVMX_BUILD_READ64(uint64, "ld");
CVMX_BUILD_READ64(uint32, "lw");
CVMX_BUILD_READ64(uint16, "lhu");
CVMX_BUILD_READ64(uint8, "lbu");
#define cvmx_read64 cvmx_read64_uint64


static inline void cvmx_write_csr(uint64_t csr_addr, uint64_t val)
{
	cvmx_write64(csr_addr, val);

	/*
	 * Perform an immediate read after every write to an RSL
	 * register to force the write to complete. It doesn't matter
	 * what RSL read we do, so we choose CVMX_MIO_BOOT_BIST_STAT
	 * because it is fast and harmless.
	 */
	if (((csr_addr >> 40) & 0x7ffff) == (0x118))
		cvmx_read64(CVMX_MIO_BOOT_BIST_STAT);
}

static inline void cvmx_writeq_csr(void __iomem *csr_addr, uint64_t val)
{
	cvmx_write_csr((__force uint64_t)csr_addr, val);
}

static inline void cvmx_write_io(uint64_t io_addr, uint64_t val)
{
	cvmx_write64(io_addr, val);

}

static inline uint64_t cvmx_read_csr(uint64_t csr_addr)
{
	uint64_t val = cvmx_read64(csr_addr);
	return val;
}

static inline uint64_t cvmx_readq_csr(void __iomem *csr_addr)
{
	return cvmx_read_csr((__force uint64_t) csr_addr);
}

static inline void cvmx_send_single(uint64_t data)
{
	const uint64_t CVMX_IOBDMA_SENDSINGLE = 0xffffffffffffa200ull;
	cvmx_write64(CVMX_IOBDMA_SENDSINGLE, data);
}

static inline void cvmx_read_csr_async(uint64_t scraddr, uint64_t csr_addr)
{
	union {
		uint64_t u64;
		struct {
			uint64_t scraddr:8;
			uint64_t len:8;
			uint64_t addr:48;
		} s;
	} addr;
	addr.u64 = csr_addr;
	addr.s.scraddr = scraddr >> 3;
	addr.s.len = 1;
	cvmx_send_single(addr.u64);
}

/* Return true if Octeon is CN38XX pass 1 */
static inline int cvmx_octeon_is_pass1(void)
{
#if OCTEON_IS_COMMON_BINARY()
	return 0;	/* Pass 1 isn't supported for common binaries */
#else
/* Now that we know we're built for a specific model, only check CN38XX */
#if OCTEON_IS_MODEL(OCTEON_CN38XX)
	return cvmx_get_proc_id() == OCTEON_CN38XX_PASS1;
#else
	return 0;	/* Built for non CN38XX chip, we're not CN38XX pass1 */
#endif
#endif
}

static inline unsigned int cvmx_get_core_num(void)
{
	unsigned int core_num;
	CVMX_RDHWRNV(core_num, 0);
	return core_num;
}

/**
 * Returns the number of bits set in the provided value.
 * Simple wrapper for POP instruction.
 *
 * @val:    32 bit value to count set bits in
 *
 * Returns Number of bits set
 */
static inline uint32_t cvmx_pop(uint32_t val)
{
	uint32_t pop;
	CVMX_POP(pop, val);
	return pop;
}

/**
 * Returns the number of bits set in the provided value.
 * Simple wrapper for DPOP instruction.
 *
 * @val:    64 bit value to count set bits in
 *
 * Returns Number of bits set
 */
static inline int cvmx_dpop(uint64_t val)
{
	int pop;
	CVMX_DPOP(pop, val);
	return pop;
}

/**
 * Provide current cycle counter as a return value
 *
 * Returns current cycle counter
 */

static inline uint64_t cvmx_get_cycle(void)
{
	uint64_t cycle;
	CVMX_RDHWR(cycle, 31);
	return cycle;
}

/**
 * Wait for the specified number of cycle
 *
 */
static inline void cvmx_wait(uint64_t cycles)
{
	uint64_t done = cvmx_get_cycle() + cycles;

	while (cvmx_get_cycle() < done)
		; /* Spin */
}

/**
 * Reads a chip global cycle counter.  This counts CPU cycles since
 * chip reset.	The counter is 64 bit.
 * This register does not exist on CN38XX pass 1 silicion
 *
 * Returns Global chip cycle count since chip reset.
 */
static inline uint64_t cvmx_get_cycle_global(void)
{
	if (cvmx_octeon_is_pass1())
		return 0;
	else
		return cvmx_read64(CVMX_IPD_CLK_COUNT);
}

/**
 * This macro spins on a field waiting for it to reach a value. It
 * is common in code to need to wait for a specific field in a CSR
 * to match a specific value. Conceptually this macro expands to:
 *
 * 1) read csr at "address" with a csr typedef of "type"
 * 2) Check if ("type".s."field" "op" "value")
 * 3) If #2 isn't true loop to #1 unless too much time has passed.
 */
#define CVMX_WAIT_FOR_FIELD64(address, type, field, op, value, timeout_usec)\
    (									\
{									\
	int result;							\
	do {								\
		uint64_t done = cvmx_get_cycle() + (uint64_t)timeout_usec * \
			cvmx_sysinfo_get()->cpu_clock_hz / 1000000;	\
		type c;							\
		while (1) {						\
			c.u64 = cvmx_read_csr(address);			\
			if ((c.s.field) op(value)) {			\
				result = 0;				\
				break;					\
			} else if (cvmx_get_cycle() > done) {		\
				result = -1;				\
				break;					\
			} else						\
				cvmx_wait(100);				\
		}							\
	} while (0);							\
	result;								\
})

/***************************************************************************/

/* Return the number of cores available in the chip */
static inline uint32_t cvmx_octeon_num_cores(void)
{
	uint32_t ciu_fuse = (uint32_t) cvmx_read_csr(CVMX_CIU_FUSE) & 0xffff;
	return cvmx_pop(ciu_fuse);
}

#endif /*  __CVMX_H__  */
OpenPOWER on IntegriCloud