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diff --git a/arch/mips/cavium-octeon/executive/cvmx-l2c.c b/arch/mips/cavium-octeon/executive/cvmx-l2c.c
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1/***********************license start***************
2 * Author: Cavium Networks
3 *
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
6 *
7 * Copyright (c) 2003-2008 Cavium Networks
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26 ***********************license end**************************************/
27
28/*
29 * Implementation of the Level 2 Cache (L2C) control, measurement, and
30 * debugging facilities.
31 */
32
33#include <asm/octeon/cvmx.h>
34#include <asm/octeon/cvmx-l2c.h>
35#include <asm/octeon/cvmx-spinlock.h>
36
37/*
38 * This spinlock is used internally to ensure that only one core is
39 * performing certain L2 operations at a time.
40 *
41 * NOTE: This only protects calls from within a single application -
42 * if multiple applications or operating systems are running, then it
43 * is up to the user program to coordinate between them.
44 */
45static cvmx_spinlock_t cvmx_l2c_spinlock;
46
47static inline int l2_size_half(void)
48{
49 uint64_t val = cvmx_read_csr(CVMX_L2D_FUS3);
50 return !!(val & (1ull << 34));
51}
52
53int cvmx_l2c_get_core_way_partition(uint32_t core)
54{
55 uint32_t field;
56
57 /* Validate the core number */
58 if (core >= cvmx_octeon_num_cores())
59 return -1;
60
61 /*
62 * Use the lower two bits of the coreNumber to determine the
63 * bit offset of the UMSK[] field in the L2C_SPAR register.
64 */
65 field = (core & 0x3) * 8;
66
67 /*
68 * Return the UMSK[] field from the appropriate L2C_SPAR
69 * register based on the coreNumber.
70 */
71
72 switch (core & 0xC) {
73 case 0x0:
74 return (cvmx_read_csr(CVMX_L2C_SPAR0) & (0xFF << field)) >>
75 field;
76 case 0x4:
77 return (cvmx_read_csr(CVMX_L2C_SPAR1) & (0xFF << field)) >>
78 field;
79 case 0x8:
80 return (cvmx_read_csr(CVMX_L2C_SPAR2) & (0xFF << field)) >>
81 field;
82 case 0xC:
83 return (cvmx_read_csr(CVMX_L2C_SPAR3) & (0xFF << field)) >>
84 field;
85 }
86 return 0;
87}
88
89int cvmx_l2c_set_core_way_partition(uint32_t core, uint32_t mask)
90{
91 uint32_t field;
92 uint32_t valid_mask;
93
94 valid_mask = (0x1 << cvmx_l2c_get_num_assoc()) - 1;
95
96 mask &= valid_mask;
97
98 /* A UMSK setting which blocks all L2C Ways is an error. */
99 if (mask == valid_mask)
100 return -1;
101
102 /* Validate the core number */
103 if (core >= cvmx_octeon_num_cores())
104 return -1;
105
106 /* Check to make sure current mask & new mask don't block all ways */
107 if (((mask | cvmx_l2c_get_core_way_partition(core)) & valid_mask) ==
108 valid_mask)
109 return -1;
110
111 /* Use the lower two bits of core to determine the bit offset of the
112 * UMSK[] field in the L2C_SPAR register.
113 */
114 field = (core & 0x3) * 8;
115
116 /* Assign the new mask setting to the UMSK[] field in the appropriate
117 * L2C_SPAR register based on the core_num.
118 *
119 */
120 switch (core & 0xC) {
121 case 0x0:
122 cvmx_write_csr(CVMX_L2C_SPAR0,
123 (cvmx_read_csr(CVMX_L2C_SPAR0) &
124 ~(0xFF << field)) | mask << field);
125 break;
126 case 0x4:
127 cvmx_write_csr(CVMX_L2C_SPAR1,
128 (cvmx_read_csr(CVMX_L2C_SPAR1) &
129 ~(0xFF << field)) | mask << field);
130 break;
131 case 0x8:
132 cvmx_write_csr(CVMX_L2C_SPAR2,
133 (cvmx_read_csr(CVMX_L2C_SPAR2) &
134 ~(0xFF << field)) | mask << field);
135 break;
136 case 0xC:
137 cvmx_write_csr(CVMX_L2C_SPAR3,
138 (cvmx_read_csr(CVMX_L2C_SPAR3) &
139 ~(0xFF << field)) | mask << field);
140 break;
141 }
142 return 0;
143}
144
145int cvmx_l2c_set_hw_way_partition(uint32_t mask)
146{
147 uint32_t valid_mask;
148
149 valid_mask = 0xff;
150
151 if (OCTEON_IS_MODEL(OCTEON_CN58XX) || OCTEON_IS_MODEL(OCTEON_CN38XX)) {
152 if (l2_size_half())
153 valid_mask = 0xf;
154 } else if (l2_size_half())
155 valid_mask = 0x3;
156
157 mask &= valid_mask;
158
159 /* A UMSK setting which blocks all L2C Ways is an error. */
160 if (mask == valid_mask)
161 return -1;
162 /* Check to make sure current mask & new mask don't block all ways */
163 if (((mask | cvmx_l2c_get_hw_way_partition()) & valid_mask) ==
164 valid_mask)
165 return -1;
166
167 cvmx_write_csr(CVMX_L2C_SPAR4,
168 (cvmx_read_csr(CVMX_L2C_SPAR4) & ~0xFF) | mask);
169 return 0;
170}
171
172int cvmx_l2c_get_hw_way_partition(void)
173{
174 return cvmx_read_csr(CVMX_L2C_SPAR4) & (0xFF);
175}
176
177void cvmx_l2c_config_perf(uint32_t counter, enum cvmx_l2c_event event,
178 uint32_t clear_on_read)
179{
180 union cvmx_l2c_pfctl pfctl;
181
182 pfctl.u64 = cvmx_read_csr(CVMX_L2C_PFCTL);
183
184 switch (counter) {
185 case 0:
186 pfctl.s.cnt0sel = event;
187 pfctl.s.cnt0ena = 1;
188 if (!cvmx_octeon_is_pass1())
189 pfctl.s.cnt0rdclr = clear_on_read;
190 break;
191 case 1:
192 pfctl.s.cnt1sel = event;
193 pfctl.s.cnt1ena = 1;
194 if (!cvmx_octeon_is_pass1())
195 pfctl.s.cnt1rdclr = clear_on_read;
196 break;
197 case 2:
198 pfctl.s.cnt2sel = event;
199 pfctl.s.cnt2ena = 1;
200 if (!cvmx_octeon_is_pass1())
201 pfctl.s.cnt2rdclr = clear_on_read;
202 break;
203 case 3:
204 default:
205 pfctl.s.cnt3sel = event;
206 pfctl.s.cnt3ena = 1;
207 if (!cvmx_octeon_is_pass1())
208 pfctl.s.cnt3rdclr = clear_on_read;
209 break;
210 }
211
212 cvmx_write_csr(CVMX_L2C_PFCTL, pfctl.u64);
213}
214
215uint64_t cvmx_l2c_read_perf(uint32_t counter)
216{
217 switch (counter) {
218 case 0:
219 return cvmx_read_csr(CVMX_L2C_PFC0);
220 case 1:
221 return cvmx_read_csr(CVMX_L2C_PFC1);
222 case 2:
223 return cvmx_read_csr(CVMX_L2C_PFC2);
224 case 3:
225 default:
226 return cvmx_read_csr(CVMX_L2C_PFC3);
227 }
228}
229
230/**
231 * @INTERNAL
232 * Helper function use to fault in cache lines for L2 cache locking
233 *
234 * @addr: Address of base of memory region to read into L2 cache
235 * @len: Length (in bytes) of region to fault in
236 */
237static void fault_in(uint64_t addr, int len)
238{
239 volatile char *ptr;
240 volatile char dummy;
241 /*
242 * Adjust addr and length so we get all cache lines even for
243 * small ranges spanning two cache lines
244 */
245 len += addr & CVMX_CACHE_LINE_MASK;
246 addr &= ~CVMX_CACHE_LINE_MASK;
247 ptr = (volatile char *)cvmx_phys_to_ptr(addr);
248 /*
249 * Invalidate L1 cache to make sure all loads result in data
250 * being in L2.
251 */
252 CVMX_DCACHE_INVALIDATE;
253 while (len > 0) {
254 dummy += *ptr;
255 len -= CVMX_CACHE_LINE_SIZE;
256 ptr += CVMX_CACHE_LINE_SIZE;
257 }
258}
259
260int cvmx_l2c_lock_line(uint64_t addr)
261{
262 int retval = 0;
263 union cvmx_l2c_dbg l2cdbg;
264 union cvmx_l2c_lckbase lckbase;
265 union cvmx_l2c_lckoff lckoff;
266 union cvmx_l2t_err l2t_err;
267 l2cdbg.u64 = 0;
268 lckbase.u64 = 0;
269 lckoff.u64 = 0;
270
271 cvmx_spinlock_lock(&cvmx_l2c_spinlock);
272
273 /* Clear l2t error bits if set */
274 l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR);
275 l2t_err.s.lckerr = 1;
276 l2t_err.s.lckerr2 = 1;
277 cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64);
278
279 addr &= ~CVMX_CACHE_LINE_MASK;
280
281 /* Set this core as debug core */
282 l2cdbg.s.ppnum = cvmx_get_core_num();
283 CVMX_SYNC;
284 cvmx_write_csr(CVMX_L2C_DBG, l2cdbg.u64);
285 cvmx_read_csr(CVMX_L2C_DBG);
286
287 lckoff.s.lck_offset = 0; /* Only lock 1 line at a time */
288 cvmx_write_csr(CVMX_L2C_LCKOFF, lckoff.u64);
289 cvmx_read_csr(CVMX_L2C_LCKOFF);
290
291 if (((union cvmx_l2c_cfg) (cvmx_read_csr(CVMX_L2C_CFG))).s.idxalias) {
292 int alias_shift =
293 CVMX_L2C_IDX_ADDR_SHIFT + 2 * CVMX_L2_SET_BITS - 1;
294 uint64_t addr_tmp =
295 addr ^ (addr & ((1 << alias_shift) - 1)) >>
296 CVMX_L2_SET_BITS;
297 lckbase.s.lck_base = addr_tmp >> 7;
298 } else {
299 lckbase.s.lck_base = addr >> 7;
300 }
301
302 lckbase.s.lck_ena = 1;
303 cvmx_write_csr(CVMX_L2C_LCKBASE, lckbase.u64);
304 cvmx_read_csr(CVMX_L2C_LCKBASE); /* Make sure it gets there */
305
306 fault_in(addr, CVMX_CACHE_LINE_SIZE);
307
308 lckbase.s.lck_ena = 0;
309 cvmx_write_csr(CVMX_L2C_LCKBASE, lckbase.u64);
310 cvmx_read_csr(CVMX_L2C_LCKBASE); /* Make sure it gets there */
311
312 /* Stop being debug core */
313 cvmx_write_csr(CVMX_L2C_DBG, 0);
314 cvmx_read_csr(CVMX_L2C_DBG);
315
316 l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR);
317 if (l2t_err.s.lckerr || l2t_err.s.lckerr2)
318 retval = 1; /* We were unable to lock the line */
319
320 cvmx_spinlock_unlock(&cvmx_l2c_spinlock);
321
322 return retval;
323}
324
325int cvmx_l2c_lock_mem_region(uint64_t start, uint64_t len)
326{
327 int retval = 0;
328
329 /* Round start/end to cache line boundaries */
330 len += start & CVMX_CACHE_LINE_MASK;
331 start &= ~CVMX_CACHE_LINE_MASK;
332 len = (len + CVMX_CACHE_LINE_MASK) & ~CVMX_CACHE_LINE_MASK;
333
334 while (len) {
335 retval += cvmx_l2c_lock_line(start);
336 start += CVMX_CACHE_LINE_SIZE;
337 len -= CVMX_CACHE_LINE_SIZE;
338 }
339
340 return retval;
341}
342
343void cvmx_l2c_flush(void)
344{
345 uint64_t assoc, set;
346 uint64_t n_assoc, n_set;
347 union cvmx_l2c_dbg l2cdbg;
348
349 cvmx_spinlock_lock(&cvmx_l2c_spinlock);
350
351 l2cdbg.u64 = 0;
352 if (!OCTEON_IS_MODEL(OCTEON_CN30XX))
353 l2cdbg.s.ppnum = cvmx_get_core_num();
354 l2cdbg.s.finv = 1;
355 n_set = CVMX_L2_SETS;
356 n_assoc = l2_size_half() ? (CVMX_L2_ASSOC / 2) : CVMX_L2_ASSOC;
357 for (set = 0; set < n_set; set++) {
358 for (assoc = 0; assoc < n_assoc; assoc++) {
359 l2cdbg.s.set = assoc;
360 /* Enter debug mode, and make sure all other
361 ** writes complete before we enter debug
362 ** mode */
363 CVMX_SYNCW;
364 cvmx_write_csr(CVMX_L2C_DBG, l2cdbg.u64);
365 cvmx_read_csr(CVMX_L2C_DBG);
366
367 CVMX_PREPARE_FOR_STORE(CVMX_ADD_SEG
368 (CVMX_MIPS_SPACE_XKPHYS,
369 set * CVMX_CACHE_LINE_SIZE), 0);
370 CVMX_SYNCW; /* Push STF out to L2 */
371 /* Exit debug mode */
372 CVMX_SYNC;
373 cvmx_write_csr(CVMX_L2C_DBG, 0);
374 cvmx_read_csr(CVMX_L2C_DBG);
375 }
376 }
377
378 cvmx_spinlock_unlock(&cvmx_l2c_spinlock);
379}
380
381int cvmx_l2c_unlock_line(uint64_t address)
382{
383 int assoc;
384 union cvmx_l2c_tag tag;
385 union cvmx_l2c_dbg l2cdbg;
386 uint32_t tag_addr;
387
388 uint32_t index = cvmx_l2c_address_to_index(address);
389
390 cvmx_spinlock_lock(&cvmx_l2c_spinlock);
391 /* Compute portion of address that is stored in tag */
392 tag_addr =
393 ((address >> CVMX_L2C_TAG_ADDR_ALIAS_SHIFT) &
394 ((1 << CVMX_L2C_TAG_ADDR_ALIAS_SHIFT) - 1));
395 for (assoc = 0; assoc < CVMX_L2_ASSOC; assoc++) {
396 tag = cvmx_get_l2c_tag(assoc, index);
397
398 if (tag.s.V && (tag.s.addr == tag_addr)) {
399 l2cdbg.u64 = 0;
400 l2cdbg.s.ppnum = cvmx_get_core_num();
401 l2cdbg.s.set = assoc;
402 l2cdbg.s.finv = 1;
403
404 CVMX_SYNC;
405 /* Enter debug mode */
406 cvmx_write_csr(CVMX_L2C_DBG, l2cdbg.u64);
407 cvmx_read_csr(CVMX_L2C_DBG);
408
409 CVMX_PREPARE_FOR_STORE(CVMX_ADD_SEG
410 (CVMX_MIPS_SPACE_XKPHYS,
411 address), 0);
412 CVMX_SYNC;
413 /* Exit debug mode */
414 cvmx_write_csr(CVMX_L2C_DBG, 0);
415 cvmx_read_csr(CVMX_L2C_DBG);
416 cvmx_spinlock_unlock(&cvmx_l2c_spinlock);
417 return tag.s.L;
418 }
419 }
420 cvmx_spinlock_unlock(&cvmx_l2c_spinlock);
421 return 0;
422}
423
424int cvmx_l2c_unlock_mem_region(uint64_t start, uint64_t len)
425{
426 int num_unlocked = 0;
427 /* Round start/end to cache line boundaries */
428 len += start & CVMX_CACHE_LINE_MASK;
429 start &= ~CVMX_CACHE_LINE_MASK;
430 len = (len + CVMX_CACHE_LINE_MASK) & ~CVMX_CACHE_LINE_MASK;
431 while (len > 0) {
432 num_unlocked += cvmx_l2c_unlock_line(start);
433 start += CVMX_CACHE_LINE_SIZE;
434 len -= CVMX_CACHE_LINE_SIZE;
435 }
436
437 return num_unlocked;
438}
439
440/*
441 * Internal l2c tag types. These are converted to a generic structure
442 * that can be used on all chips.
443 */
444union __cvmx_l2c_tag {
445 uint64_t u64;
446 struct cvmx_l2c_tag_cn50xx {
447 uint64_t reserved:40;
448 uint64_t V:1; /* Line valid */
449 uint64_t D:1; /* Line dirty */
450 uint64_t L:1; /* Line locked */
451 uint64_t U:1; /* Use, LRU eviction */
452 uint64_t addr:20; /* Phys mem addr (33..14) */
453 } cn50xx;
454 struct cvmx_l2c_tag_cn30xx {
455 uint64_t reserved:41;
456 uint64_t V:1; /* Line valid */
457 uint64_t D:1; /* Line dirty */
458 uint64_t L:1; /* Line locked */
459 uint64_t U:1; /* Use, LRU eviction */
460 uint64_t addr:19; /* Phys mem addr (33..15) */
461 } cn30xx;
462 struct cvmx_l2c_tag_cn31xx {
463 uint64_t reserved:42;
464 uint64_t V:1; /* Line valid */
465 uint64_t D:1; /* Line dirty */
466 uint64_t L:1; /* Line locked */
467 uint64_t U:1; /* Use, LRU eviction */
468 uint64_t addr:18; /* Phys mem addr (33..16) */
469 } cn31xx;
470 struct cvmx_l2c_tag_cn38xx {
471 uint64_t reserved:43;
472 uint64_t V:1; /* Line valid */
473 uint64_t D:1; /* Line dirty */
474 uint64_t L:1; /* Line locked */
475 uint64_t U:1; /* Use, LRU eviction */
476 uint64_t addr:17; /* Phys mem addr (33..17) */
477 } cn38xx;
478 struct cvmx_l2c_tag_cn58xx {
479 uint64_t reserved:44;
480 uint64_t V:1; /* Line valid */
481 uint64_t D:1; /* Line dirty */
482 uint64_t L:1; /* Line locked */
483 uint64_t U:1; /* Use, LRU eviction */
484 uint64_t addr:16; /* Phys mem addr (33..18) */
485 } cn58xx;
486 struct cvmx_l2c_tag_cn58xx cn56xx; /* 2048 sets */
487 struct cvmx_l2c_tag_cn31xx cn52xx; /* 512 sets */
488};
489
490/**
491 * @INTERNAL
492 * Function to read a L2C tag. This code make the current core
493 * the 'debug core' for the L2. This code must only be executed by
494 * 1 core at a time.
495 *
496 * @assoc: Association (way) of the tag to dump
497 * @index: Index of the cacheline
498 *
499 * Returns The Octeon model specific tag structure. This is
500 * translated by a wrapper function to a generic form that is
501 * easier for applications to use.
502 */
503static union __cvmx_l2c_tag __read_l2_tag(uint64_t assoc, uint64_t index)
504{
505
506 uint64_t debug_tag_addr = (((1ULL << 63) | (index << 7)) + 96);
507 uint64_t core = cvmx_get_core_num();
508 union __cvmx_l2c_tag tag_val;
509 uint64_t dbg_addr = CVMX_L2C_DBG;
510 unsigned long flags;
511
512 union cvmx_l2c_dbg debug_val;
513 debug_val.u64 = 0;
514 /*
515 * For low core count parts, the core number is always small enough
516 * to stay in the correct field and not set any reserved bits.
517 */
518 debug_val.s.ppnum = core;
519 debug_val.s.l2t = 1;
520 debug_val.s.set = assoc;
521 /*
522 * Make sure core is quiet (no prefetches, etc.) before
523 * entering debug mode.
524 */
525 CVMX_SYNC;
526 /* Flush L1 to make sure debug load misses L1 */
527 CVMX_DCACHE_INVALIDATE;
528
529 local_irq_save(flags);
530
531 /*
532 * The following must be done in assembly as when in debug
533 * mode all data loads from L2 return special debug data, not
534 * normal memory contents. Also, interrupts must be
535 * disabled, since if an interrupt occurs while in debug mode
536 * the ISR will get debug data from all its memory reads
537 * instead of the contents of memory
538 */
539
540 asm volatile (".set push \n"
541 " .set mips64 \n"
542 " .set noreorder \n"
543 /* Enter debug mode, wait for store */
544 " sd %[dbg_val], 0(%[dbg_addr]) \n"
545 " ld $0, 0(%[dbg_addr]) \n"
546 /* Read L2C tag data */
547 " ld %[tag_val], 0(%[tag_addr]) \n"
548 /* Exit debug mode, wait for store */
549 " sd $0, 0(%[dbg_addr]) \n"
550 " ld $0, 0(%[dbg_addr]) \n"
551 /* Invalidate dcache to discard debug data */
552 " cache 9, 0($0) \n"
553 " .set pop" :
554 [tag_val] "=r"(tag_val.u64) : [dbg_addr] "r"(dbg_addr),
555 [dbg_val] "r"(debug_val.u64),
556 [tag_addr] "r"(debug_tag_addr) : "memory");
557
558 local_irq_restore(flags);
559 return tag_val;
560
561}
562
563union cvmx_l2c_tag cvmx_l2c_get_tag(uint32_t association, uint32_t index)
564{
565 union __cvmx_l2c_tag tmp_tag;
566 union cvmx_l2c_tag tag;
567 tag.u64 = 0;
568
569 if ((int)association >= cvmx_l2c_get_num_assoc()) {
570 cvmx_dprintf
571 ("ERROR: cvmx_get_l2c_tag association out of range\n");
572 return tag;
573 }
574 if ((int)index >= cvmx_l2c_get_num_sets()) {
575 cvmx_dprintf("ERROR: cvmx_get_l2c_tag "
576 "index out of range (arg: %d, max: %d\n",
577 index, cvmx_l2c_get_num_sets());
578 return tag;
579 }
580 /* __read_l2_tag is intended for internal use only */
581 tmp_tag = __read_l2_tag(association, index);
582
583 /*
584 * Convert all tag structure types to generic version, as it
585 * can represent all models.
586 */
587 if (OCTEON_IS_MODEL(OCTEON_CN58XX) || OCTEON_IS_MODEL(OCTEON_CN56XX)) {
588 tag.s.V = tmp_tag.cn58xx.V;
589 tag.s.D = tmp_tag.cn58xx.D;
590 tag.s.L = tmp_tag.cn58xx.L;
591 tag.s.U = tmp_tag.cn58xx.U;
592 tag.s.addr = tmp_tag.cn58xx.addr;
593 } else if (OCTEON_IS_MODEL(OCTEON_CN38XX)) {
594 tag.s.V = tmp_tag.cn38xx.V;
595 tag.s.D = tmp_tag.cn38xx.D;
596 tag.s.L = tmp_tag.cn38xx.L;
597 tag.s.U = tmp_tag.cn38xx.U;
598 tag.s.addr = tmp_tag.cn38xx.addr;
599 } else if (OCTEON_IS_MODEL(OCTEON_CN31XX)
600 || OCTEON_IS_MODEL(OCTEON_CN52XX)) {
601 tag.s.V = tmp_tag.cn31xx.V;
602 tag.s.D = tmp_tag.cn31xx.D;
603 tag.s.L = tmp_tag.cn31xx.L;
604 tag.s.U = tmp_tag.cn31xx.U;
605 tag.s.addr = tmp_tag.cn31xx.addr;
606 } else if (OCTEON_IS_MODEL(OCTEON_CN30XX)) {
607 tag.s.V = tmp_tag.cn30xx.V;
608 tag.s.D = tmp_tag.cn30xx.D;
609 tag.s.L = tmp_tag.cn30xx.L;
610 tag.s.U = tmp_tag.cn30xx.U;
611 tag.s.addr = tmp_tag.cn30xx.addr;
612 } else if (OCTEON_IS_MODEL(OCTEON_CN50XX)) {
613 tag.s.V = tmp_tag.cn50xx.V;
614 tag.s.D = tmp_tag.cn50xx.D;
615 tag.s.L = tmp_tag.cn50xx.L;
616 tag.s.U = tmp_tag.cn50xx.U;
617 tag.s.addr = tmp_tag.cn50xx.addr;
618 } else {
619 cvmx_dprintf("Unsupported OCTEON Model in %s\n", __func__);
620 }
621
622 return tag;
623}
624
625uint32_t cvmx_l2c_address_to_index(uint64_t addr)
626{
627 uint64_t idx = addr >> CVMX_L2C_IDX_ADDR_SHIFT;
628 union cvmx_l2c_cfg l2c_cfg;
629 l2c_cfg.u64 = cvmx_read_csr(CVMX_L2C_CFG);
630
631 if (l2c_cfg.s.idxalias) {
632 idx ^=
633 ((addr & CVMX_L2C_ALIAS_MASK) >>
634 CVMX_L2C_TAG_ADDR_ALIAS_SHIFT);
635 }
636 idx &= CVMX_L2C_IDX_MASK;
637 return idx;
638}
639
640int cvmx_l2c_get_cache_size_bytes(void)
641{
642 return cvmx_l2c_get_num_sets() * cvmx_l2c_get_num_assoc() *
643 CVMX_CACHE_LINE_SIZE;
644}
645
646/**
647 * Return log base 2 of the number of sets in the L2 cache
648 * Returns
649 */
650int cvmx_l2c_get_set_bits(void)
651{
652 int l2_set_bits;
653 if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN58XX))
654 l2_set_bits = 11; /* 2048 sets */
655 else if (OCTEON_IS_MODEL(OCTEON_CN38XX))
656 l2_set_bits = 10; /* 1024 sets */
657 else if (OCTEON_IS_MODEL(OCTEON_CN31XX)
658 || OCTEON_IS_MODEL(OCTEON_CN52XX))
659 l2_set_bits = 9; /* 512 sets */
660 else if (OCTEON_IS_MODEL(OCTEON_CN30XX))
661 l2_set_bits = 8; /* 256 sets */
662 else if (OCTEON_IS_MODEL(OCTEON_CN50XX))
663 l2_set_bits = 7; /* 128 sets */
664 else {
665 cvmx_dprintf("Unsupported OCTEON Model in %s\n", __func__);
666 l2_set_bits = 11; /* 2048 sets */
667 }
668 return l2_set_bits;
669
670}
671
672/* Return the number of sets in the L2 Cache */
673int cvmx_l2c_get_num_sets(void)
674{
675 return 1 << cvmx_l2c_get_set_bits();
676}
677
678/* Return the number of associations in the L2 Cache */
679int cvmx_l2c_get_num_assoc(void)
680{
681 int l2_assoc;
682 if (OCTEON_IS_MODEL(OCTEON_CN56XX) ||
683 OCTEON_IS_MODEL(OCTEON_CN52XX) ||
684 OCTEON_IS_MODEL(OCTEON_CN58XX) ||
685 OCTEON_IS_MODEL(OCTEON_CN50XX) || OCTEON_IS_MODEL(OCTEON_CN38XX))
686 l2_assoc = 8;
687 else if (OCTEON_IS_MODEL(OCTEON_CN31XX) ||
688 OCTEON_IS_MODEL(OCTEON_CN30XX))
689 l2_assoc = 4;
690 else {
691 cvmx_dprintf("Unsupported OCTEON Model in %s\n", __func__);
692 l2_assoc = 8;
693 }
694
695 /* Check to see if part of the cache is disabled */
696 if (cvmx_fuse_read(265))
697 l2_assoc = l2_assoc >> 2;
698 else if (cvmx_fuse_read(264))
699 l2_assoc = l2_assoc >> 1;
700
701 return l2_assoc;
702}
703
704/**
705 * Flush a line from the L2 cache
706 * This should only be called from one core at a time, as this routine
707 * sets the core to the 'debug' core in order to flush the line.
708 *
709 * @assoc: Association (or way) to flush
710 * @index: Index to flush
711 */
712void cvmx_l2c_flush_line(uint32_t assoc, uint32_t index)
713{
714 union cvmx_l2c_dbg l2cdbg;
715
716 l2cdbg.u64 = 0;
717 l2cdbg.s.ppnum = cvmx_get_core_num();
718 l2cdbg.s.finv = 1;
719
720 l2cdbg.s.set = assoc;
721 /*
722 * Enter debug mode, and make sure all other writes complete
723 * before we enter debug mode.
724 */
725 asm volatile ("sync" : : : "memory");
726 cvmx_write_csr(CVMX_L2C_DBG, l2cdbg.u64);
727 cvmx_read_csr(CVMX_L2C_DBG);
728
729 CVMX_PREPARE_FOR_STORE(((1ULL << 63) + (index) * 128), 0);
730 /* Exit debug mode */
731 asm volatile ("sync" : : : "memory");
732 cvmx_write_csr(CVMX_L2C_DBG, 0);
733 cvmx_read_csr(CVMX_L2C_DBG);
734}
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-19 19:03:14 -0500