xref: /openbmc/linux/arch/arm/mm/cache-l2x0.c (revision 8e007b36)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * arch/arm/mm/cache-l2x0.c - L210/L220/L310 cache controller support
4  *
5  * Copyright (C) 2007 ARM Limited
6  */
7 #include <linux/cpu.h>
8 #include <linux/err.h>
9 #include <linux/init.h>
10 #include <linux/smp.h>
11 #include <linux/spinlock.h>
12 #include <linux/log2.h>
13 #include <linux/io.h>
14 #include <linux/of.h>
15 #include <linux/of_address.h>
16 
17 #include <asm/cacheflush.h>
18 #include <asm/cp15.h>
19 #include <asm/cputype.h>
20 #include <asm/hardware/cache-l2x0.h>
21 #include <asm/hardware/cache-aurora-l2.h>
22 #include "cache-tauros3.h"
23 
24 struct l2c_init_data {
25 	const char *type;
26 	unsigned way_size_0;
27 	unsigned num_lock;
28 	void (*of_parse)(const struct device_node *, u32 *, u32 *);
29 	void (*enable)(void __iomem *, unsigned);
30 	void (*fixup)(void __iomem *, u32, struct outer_cache_fns *);
31 	void (*save)(void __iomem *);
32 	void (*configure)(void __iomem *);
33 	void (*unlock)(void __iomem *, unsigned);
34 	struct outer_cache_fns outer_cache;
35 };
36 
37 #define CACHE_LINE_SIZE		32
38 
39 static void __iomem *l2x0_base;
40 static const struct l2c_init_data *l2x0_data;
41 static DEFINE_RAW_SPINLOCK(l2x0_lock);
42 static u32 l2x0_way_mask;	/* Bitmask of active ways */
43 static u32 l2x0_size;
44 static unsigned long sync_reg_offset = L2X0_CACHE_SYNC;
45 
46 struct l2x0_regs l2x0_saved_regs;
47 
48 static bool l2x0_bresp_disable;
49 static bool l2x0_flz_disable;
50 
51 /*
52  * Common code for all cache controllers.
53  */
l2c_wait_mask(void __iomem * reg,unsigned long mask)54 static inline void l2c_wait_mask(void __iomem *reg, unsigned long mask)
55 {
56 	/* wait for cache operation by line or way to complete */
57 	while (readl_relaxed(reg) & mask)
58 		cpu_relax();
59 }
60 
61 /*
62  * By default, we write directly to secure registers.  Platforms must
63  * override this if they are running non-secure.
64  */
l2c_write_sec(unsigned long val,void __iomem * base,unsigned reg)65 static void l2c_write_sec(unsigned long val, void __iomem *base, unsigned reg)
66 {
67 	if (val == readl_relaxed(base + reg))
68 		return;
69 	if (outer_cache.write_sec)
70 		outer_cache.write_sec(val, reg);
71 	else
72 		writel_relaxed(val, base + reg);
73 }
74 
75 /*
76  * This should only be called when we have a requirement that the
77  * register be written due to a work-around, as platforms running
78  * in non-secure mode may not be able to access this register.
79  */
l2c_set_debug(void __iomem * base,unsigned long val)80 static inline void l2c_set_debug(void __iomem *base, unsigned long val)
81 {
82 	l2c_write_sec(val, base, L2X0_DEBUG_CTRL);
83 }
84 
__l2c_op_way(void __iomem * reg)85 static void __l2c_op_way(void __iomem *reg)
86 {
87 	writel_relaxed(l2x0_way_mask, reg);
88 	l2c_wait_mask(reg, l2x0_way_mask);
89 }
90 
l2c_unlock(void __iomem * base,unsigned num)91 static inline void l2c_unlock(void __iomem *base, unsigned num)
92 {
93 	unsigned i;
94 
95 	for (i = 0; i < num; i++) {
96 		writel_relaxed(0, base + L2X0_LOCKDOWN_WAY_D_BASE +
97 			       i * L2X0_LOCKDOWN_STRIDE);
98 		writel_relaxed(0, base + L2X0_LOCKDOWN_WAY_I_BASE +
99 			       i * L2X0_LOCKDOWN_STRIDE);
100 	}
101 }
102 
l2c_configure(void __iomem * base)103 static void l2c_configure(void __iomem *base)
104 {
105 	l2c_write_sec(l2x0_saved_regs.aux_ctrl, base, L2X0_AUX_CTRL);
106 }
107 
108 /*
109  * Enable the L2 cache controller.  This function must only be
110  * called when the cache controller is known to be disabled.
111  */
l2c_enable(void __iomem * base,unsigned num_lock)112 static void l2c_enable(void __iomem *base, unsigned num_lock)
113 {
114 	unsigned long flags;
115 
116 	if (outer_cache.configure)
117 		outer_cache.configure(&l2x0_saved_regs);
118 	else
119 		l2x0_data->configure(base);
120 
121 	l2x0_data->unlock(base, num_lock);
122 
123 	local_irq_save(flags);
124 	__l2c_op_way(base + L2X0_INV_WAY);
125 	writel_relaxed(0, base + sync_reg_offset);
126 	l2c_wait_mask(base + sync_reg_offset, 1);
127 	local_irq_restore(flags);
128 
129 	l2c_write_sec(L2X0_CTRL_EN, base, L2X0_CTRL);
130 }
131 
l2c_disable(void)132 static void l2c_disable(void)
133 {
134 	void __iomem *base = l2x0_base;
135 
136 	l2x0_pmu_suspend();
137 
138 	outer_cache.flush_all();
139 	l2c_write_sec(0, base, L2X0_CTRL);
140 	dsb(st);
141 }
142 
l2c_save(void __iomem * base)143 static void l2c_save(void __iomem *base)
144 {
145 	l2x0_saved_regs.aux_ctrl = readl_relaxed(l2x0_base + L2X0_AUX_CTRL);
146 }
147 
l2c_resume(void)148 static void l2c_resume(void)
149 {
150 	void __iomem *base = l2x0_base;
151 
152 	/* Do not touch the controller if already enabled. */
153 	if (!(readl_relaxed(base + L2X0_CTRL) & L2X0_CTRL_EN))
154 		l2c_enable(base, l2x0_data->num_lock);
155 
156 	l2x0_pmu_resume();
157 }
158 
159 /*
160  * L2C-210 specific code.
161  *
162  * The L2C-2x0 PA, set/way and sync operations are atomic, but we must
163  * ensure that no background operation is running.  The way operations
164  * are all background tasks.
165  *
166  * While a background operation is in progress, any new operation is
167  * ignored (unspecified whether this causes an error.)  Thankfully, not
168  * used on SMP.
169  *
170  * Never has a different sync register other than L2X0_CACHE_SYNC, but
171  * we use sync_reg_offset here so we can share some of this with L2C-310.
172  */
__l2c210_cache_sync(void __iomem * base)173 static void __l2c210_cache_sync(void __iomem *base)
174 {
175 	writel_relaxed(0, base + sync_reg_offset);
176 }
177 
__l2c210_op_pa_range(void __iomem * reg,unsigned long start,unsigned long end)178 static void __l2c210_op_pa_range(void __iomem *reg, unsigned long start,
179 	unsigned long end)
180 {
181 	while (start < end) {
182 		writel_relaxed(start, reg);
183 		start += CACHE_LINE_SIZE;
184 	}
185 }
186 
l2c210_inv_range(unsigned long start,unsigned long end)187 static void l2c210_inv_range(unsigned long start, unsigned long end)
188 {
189 	void __iomem *base = l2x0_base;
190 
191 	if (start & (CACHE_LINE_SIZE - 1)) {
192 		start &= ~(CACHE_LINE_SIZE - 1);
193 		writel_relaxed(start, base + L2X0_CLEAN_INV_LINE_PA);
194 		start += CACHE_LINE_SIZE;
195 	}
196 
197 	if (end & (CACHE_LINE_SIZE - 1)) {
198 		end &= ~(CACHE_LINE_SIZE - 1);
199 		writel_relaxed(end, base + L2X0_CLEAN_INV_LINE_PA);
200 	}
201 
202 	__l2c210_op_pa_range(base + L2X0_INV_LINE_PA, start, end);
203 	__l2c210_cache_sync(base);
204 }
205 
l2c210_clean_range(unsigned long start,unsigned long end)206 static void l2c210_clean_range(unsigned long start, unsigned long end)
207 {
208 	void __iomem *base = l2x0_base;
209 
210 	start &= ~(CACHE_LINE_SIZE - 1);
211 	__l2c210_op_pa_range(base + L2X0_CLEAN_LINE_PA, start, end);
212 	__l2c210_cache_sync(base);
213 }
214 
l2c210_flush_range(unsigned long start,unsigned long end)215 static void l2c210_flush_range(unsigned long start, unsigned long end)
216 {
217 	void __iomem *base = l2x0_base;
218 
219 	start &= ~(CACHE_LINE_SIZE - 1);
220 	__l2c210_op_pa_range(base + L2X0_CLEAN_INV_LINE_PA, start, end);
221 	__l2c210_cache_sync(base);
222 }
223 
l2c210_flush_all(void)224 static void l2c210_flush_all(void)
225 {
226 	void __iomem *base = l2x0_base;
227 
228 	BUG_ON(!irqs_disabled());
229 
230 	__l2c_op_way(base + L2X0_CLEAN_INV_WAY);
231 	__l2c210_cache_sync(base);
232 }
233 
l2c210_sync(void)234 static void l2c210_sync(void)
235 {
236 	__l2c210_cache_sync(l2x0_base);
237 }
238 
239 static const struct l2c_init_data l2c210_data __initconst = {
240 	.type = "L2C-210",
241 	.way_size_0 = SZ_8K,
242 	.num_lock = 1,
243 	.enable = l2c_enable,
244 	.save = l2c_save,
245 	.configure = l2c_configure,
246 	.unlock = l2c_unlock,
247 	.outer_cache = {
248 		.inv_range = l2c210_inv_range,
249 		.clean_range = l2c210_clean_range,
250 		.flush_range = l2c210_flush_range,
251 		.flush_all = l2c210_flush_all,
252 		.disable = l2c_disable,
253 		.sync = l2c210_sync,
254 		.resume = l2c_resume,
255 	},
256 };
257 
258 /*
259  * L2C-220 specific code.
260  *
261  * All operations are background operations: they have to be waited for.
262  * Conflicting requests generate a slave error (which will cause an
263  * imprecise abort.)  Never uses sync_reg_offset, so we hard-code the
264  * sync register here.
265  *
266  * However, we can re-use the l2c210_resume call.
267  */
__l2c220_cache_sync(void __iomem * base)268 static inline void __l2c220_cache_sync(void __iomem *base)
269 {
270 	writel_relaxed(0, base + L2X0_CACHE_SYNC);
271 	l2c_wait_mask(base + L2X0_CACHE_SYNC, 1);
272 }
273 
l2c220_op_way(void __iomem * base,unsigned reg)274 static void l2c220_op_way(void __iomem *base, unsigned reg)
275 {
276 	unsigned long flags;
277 
278 	raw_spin_lock_irqsave(&l2x0_lock, flags);
279 	__l2c_op_way(base + reg);
280 	__l2c220_cache_sync(base);
281 	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
282 }
283 
l2c220_op_pa_range(void __iomem * reg,unsigned long start,unsigned long end,unsigned long flags)284 static unsigned long l2c220_op_pa_range(void __iomem *reg, unsigned long start,
285 	unsigned long end, unsigned long flags)
286 {
287 	raw_spinlock_t *lock = &l2x0_lock;
288 
289 	while (start < end) {
290 		unsigned long blk_end = start + min(end - start, 4096UL);
291 
292 		while (start < blk_end) {
293 			l2c_wait_mask(reg, 1);
294 			writel_relaxed(start, reg);
295 			start += CACHE_LINE_SIZE;
296 		}
297 
298 		if (blk_end < end) {
299 			raw_spin_unlock_irqrestore(lock, flags);
300 			raw_spin_lock_irqsave(lock, flags);
301 		}
302 	}
303 
304 	return flags;
305 }
306 
l2c220_inv_range(unsigned long start,unsigned long end)307 static void l2c220_inv_range(unsigned long start, unsigned long end)
308 {
309 	void __iomem *base = l2x0_base;
310 	unsigned long flags;
311 
312 	raw_spin_lock_irqsave(&l2x0_lock, flags);
313 	if ((start | end) & (CACHE_LINE_SIZE - 1)) {
314 		if (start & (CACHE_LINE_SIZE - 1)) {
315 			start &= ~(CACHE_LINE_SIZE - 1);
316 			writel_relaxed(start, base + L2X0_CLEAN_INV_LINE_PA);
317 			start += CACHE_LINE_SIZE;
318 		}
319 
320 		if (end & (CACHE_LINE_SIZE - 1)) {
321 			end &= ~(CACHE_LINE_SIZE - 1);
322 			l2c_wait_mask(base + L2X0_CLEAN_INV_LINE_PA, 1);
323 			writel_relaxed(end, base + L2X0_CLEAN_INV_LINE_PA);
324 		}
325 	}
326 
327 	flags = l2c220_op_pa_range(base + L2X0_INV_LINE_PA,
328 				   start, end, flags);
329 	l2c_wait_mask(base + L2X0_INV_LINE_PA, 1);
330 	__l2c220_cache_sync(base);
331 	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
332 }
333 
l2c220_clean_range(unsigned long start,unsigned long end)334 static void l2c220_clean_range(unsigned long start, unsigned long end)
335 {
336 	void __iomem *base = l2x0_base;
337 	unsigned long flags;
338 
339 	start &= ~(CACHE_LINE_SIZE - 1);
340 	if ((end - start) >= l2x0_size) {
341 		l2c220_op_way(base, L2X0_CLEAN_WAY);
342 		return;
343 	}
344 
345 	raw_spin_lock_irqsave(&l2x0_lock, flags);
346 	flags = l2c220_op_pa_range(base + L2X0_CLEAN_LINE_PA,
347 				   start, end, flags);
348 	l2c_wait_mask(base + L2X0_CLEAN_INV_LINE_PA, 1);
349 	__l2c220_cache_sync(base);
350 	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
351 }
352 
l2c220_flush_range(unsigned long start,unsigned long end)353 static void l2c220_flush_range(unsigned long start, unsigned long end)
354 {
355 	void __iomem *base = l2x0_base;
356 	unsigned long flags;
357 
358 	start &= ~(CACHE_LINE_SIZE - 1);
359 	if ((end - start) >= l2x0_size) {
360 		l2c220_op_way(base, L2X0_CLEAN_INV_WAY);
361 		return;
362 	}
363 
364 	raw_spin_lock_irqsave(&l2x0_lock, flags);
365 	flags = l2c220_op_pa_range(base + L2X0_CLEAN_INV_LINE_PA,
366 				   start, end, flags);
367 	l2c_wait_mask(base + L2X0_CLEAN_INV_LINE_PA, 1);
368 	__l2c220_cache_sync(base);
369 	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
370 }
371 
l2c220_flush_all(void)372 static void l2c220_flush_all(void)
373 {
374 	l2c220_op_way(l2x0_base, L2X0_CLEAN_INV_WAY);
375 }
376 
l2c220_sync(void)377 static void l2c220_sync(void)
378 {
379 	unsigned long flags;
380 
381 	raw_spin_lock_irqsave(&l2x0_lock, flags);
382 	__l2c220_cache_sync(l2x0_base);
383 	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
384 }
385 
l2c220_enable(void __iomem * base,unsigned num_lock)386 static void l2c220_enable(void __iomem *base, unsigned num_lock)
387 {
388 	/*
389 	 * Always enable non-secure access to the lockdown registers -
390 	 * we write to them as part of the L2C enable sequence so they
391 	 * need to be accessible.
392 	 */
393 	l2x0_saved_regs.aux_ctrl |= L220_AUX_CTRL_NS_LOCKDOWN;
394 
395 	l2c_enable(base, num_lock);
396 }
397 
l2c220_unlock(void __iomem * base,unsigned num_lock)398 static void l2c220_unlock(void __iomem *base, unsigned num_lock)
399 {
400 	if (readl_relaxed(base + L2X0_AUX_CTRL) & L220_AUX_CTRL_NS_LOCKDOWN)
401 		l2c_unlock(base, num_lock);
402 }
403 
404 static const struct l2c_init_data l2c220_data = {
405 	.type = "L2C-220",
406 	.way_size_0 = SZ_8K,
407 	.num_lock = 1,
408 	.enable = l2c220_enable,
409 	.save = l2c_save,
410 	.configure = l2c_configure,
411 	.unlock = l2c220_unlock,
412 	.outer_cache = {
413 		.inv_range = l2c220_inv_range,
414 		.clean_range = l2c220_clean_range,
415 		.flush_range = l2c220_flush_range,
416 		.flush_all = l2c220_flush_all,
417 		.disable = l2c_disable,
418 		.sync = l2c220_sync,
419 		.resume = l2c_resume,
420 	},
421 };
422 
423 /*
424  * L2C-310 specific code.
425  *
426  * Very similar to L2C-210, the PA, set/way and sync operations are atomic,
427  * and the way operations are all background tasks.  However, issuing an
428  * operation while a background operation is in progress results in a
429  * SLVERR response.  We can reuse:
430  *
431  *  __l2c210_cache_sync (using sync_reg_offset)
432  *  l2c210_sync
433  *  l2c210_inv_range (if 588369 is not applicable)
434  *  l2c210_clean_range
435  *  l2c210_flush_range (if 588369 is not applicable)
436  *  l2c210_flush_all (if 727915 is not applicable)
437  *
438  * Errata:
439  * 588369: PL310 R0P0->R1P0, fixed R2P0.
440  *	Affects: all clean+invalidate operations
441  *	clean and invalidate skips the invalidate step, so we need to issue
442  *	separate operations.  We also require the above debug workaround
443  *	enclosing this code fragment on affected parts.  On unaffected parts,
444  *	we must not use this workaround without the debug register writes
445  *	to avoid exposing a problem similar to 727915.
446  *
447  * 727915: PL310 R2P0->R3P0, fixed R3P1.
448  *	Affects: clean+invalidate by way
449  *	clean and invalidate by way runs in the background, and a store can
450  *	hit the line between the clean operation and invalidate operation,
451  *	resulting in the store being lost.
452  *
453  * 752271: PL310 R3P0->R3P1-50REL0, fixed R3P2.
454  *	Affects: 8x64-bit (double fill) line fetches
455  *	double fill line fetches can fail to cause dirty data to be evicted
456  *	from the cache before the new data overwrites the second line.
457  *
458  * 753970: PL310 R3P0, fixed R3P1.
459  *	Affects: sync
460  *	prevents merging writes after the sync operation, until another L2C
461  *	operation is performed (or a number of other conditions.)
462  *
463  * 769419: PL310 R0P0->R3P1, fixed R3P2.
464  *	Affects: store buffer
465  *	store buffer is not automatically drained.
466  */
l2c310_inv_range_erratum(unsigned long start,unsigned long end)467 static void l2c310_inv_range_erratum(unsigned long start, unsigned long end)
468 {
469 	void __iomem *base = l2x0_base;
470 
471 	if ((start | end) & (CACHE_LINE_SIZE - 1)) {
472 		unsigned long flags;
473 
474 		/* Erratum 588369 for both clean+invalidate operations */
475 		raw_spin_lock_irqsave(&l2x0_lock, flags);
476 		l2c_set_debug(base, 0x03);
477 
478 		if (start & (CACHE_LINE_SIZE - 1)) {
479 			start &= ~(CACHE_LINE_SIZE - 1);
480 			writel_relaxed(start, base + L2X0_CLEAN_LINE_PA);
481 			writel_relaxed(start, base + L2X0_INV_LINE_PA);
482 			start += CACHE_LINE_SIZE;
483 		}
484 
485 		if (end & (CACHE_LINE_SIZE - 1)) {
486 			end &= ~(CACHE_LINE_SIZE - 1);
487 			writel_relaxed(end, base + L2X0_CLEAN_LINE_PA);
488 			writel_relaxed(end, base + L2X0_INV_LINE_PA);
489 		}
490 
491 		l2c_set_debug(base, 0x00);
492 		raw_spin_unlock_irqrestore(&l2x0_lock, flags);
493 	}
494 
495 	__l2c210_op_pa_range(base + L2X0_INV_LINE_PA, start, end);
496 	__l2c210_cache_sync(base);
497 }
498 
l2c310_flush_range_erratum(unsigned long start,unsigned long end)499 static void l2c310_flush_range_erratum(unsigned long start, unsigned long end)
500 {
501 	raw_spinlock_t *lock = &l2x0_lock;
502 	unsigned long flags;
503 	void __iomem *base = l2x0_base;
504 
505 	raw_spin_lock_irqsave(lock, flags);
506 	while (start < end) {
507 		unsigned long blk_end = start + min(end - start, 4096UL);
508 
509 		l2c_set_debug(base, 0x03);
510 		while (start < blk_end) {
511 			writel_relaxed(start, base + L2X0_CLEAN_LINE_PA);
512 			writel_relaxed(start, base + L2X0_INV_LINE_PA);
513 			start += CACHE_LINE_SIZE;
514 		}
515 		l2c_set_debug(base, 0x00);
516 
517 		if (blk_end < end) {
518 			raw_spin_unlock_irqrestore(lock, flags);
519 			raw_spin_lock_irqsave(lock, flags);
520 		}
521 	}
522 	raw_spin_unlock_irqrestore(lock, flags);
523 	__l2c210_cache_sync(base);
524 }
525 
l2c310_flush_all_erratum(void)526 static void l2c310_flush_all_erratum(void)
527 {
528 	void __iomem *base = l2x0_base;
529 	unsigned long flags;
530 
531 	raw_spin_lock_irqsave(&l2x0_lock, flags);
532 	l2c_set_debug(base, 0x03);
533 	__l2c_op_way(base + L2X0_CLEAN_INV_WAY);
534 	l2c_set_debug(base, 0x00);
535 	__l2c210_cache_sync(base);
536 	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
537 }
538 
l2c310_save(void __iomem * base)539 static void __init l2c310_save(void __iomem *base)
540 {
541 	unsigned revision;
542 
543 	l2c_save(base);
544 
545 	l2x0_saved_regs.tag_latency = readl_relaxed(base +
546 		L310_TAG_LATENCY_CTRL);
547 	l2x0_saved_regs.data_latency = readl_relaxed(base +
548 		L310_DATA_LATENCY_CTRL);
549 	l2x0_saved_regs.filter_end = readl_relaxed(base +
550 		L310_ADDR_FILTER_END);
551 	l2x0_saved_regs.filter_start = readl_relaxed(base +
552 		L310_ADDR_FILTER_START);
553 
554 	revision = readl_relaxed(base + L2X0_CACHE_ID) &
555 			L2X0_CACHE_ID_RTL_MASK;
556 
557 	/* From r2p0, there is Prefetch offset/control register */
558 	if (revision >= L310_CACHE_ID_RTL_R2P0)
559 		l2x0_saved_regs.prefetch_ctrl = readl_relaxed(base +
560 							L310_PREFETCH_CTRL);
561 
562 	/* From r3p0, there is Power control register */
563 	if (revision >= L310_CACHE_ID_RTL_R3P0)
564 		l2x0_saved_regs.pwr_ctrl = readl_relaxed(base +
565 							L310_POWER_CTRL);
566 }
567 
l2c310_configure(void __iomem * base)568 static void l2c310_configure(void __iomem *base)
569 {
570 	unsigned revision;
571 
572 	l2c_configure(base);
573 
574 	/* restore pl310 setup */
575 	l2c_write_sec(l2x0_saved_regs.tag_latency, base,
576 		      L310_TAG_LATENCY_CTRL);
577 	l2c_write_sec(l2x0_saved_regs.data_latency, base,
578 		      L310_DATA_LATENCY_CTRL);
579 	l2c_write_sec(l2x0_saved_regs.filter_end, base,
580 		      L310_ADDR_FILTER_END);
581 	l2c_write_sec(l2x0_saved_regs.filter_start, base,
582 		      L310_ADDR_FILTER_START);
583 
584 	revision = readl_relaxed(base + L2X0_CACHE_ID) &
585 				 L2X0_CACHE_ID_RTL_MASK;
586 
587 	if (revision >= L310_CACHE_ID_RTL_R2P0)
588 		l2c_write_sec(l2x0_saved_regs.prefetch_ctrl, base,
589 			      L310_PREFETCH_CTRL);
590 	if (revision >= L310_CACHE_ID_RTL_R3P0)
591 		l2c_write_sec(l2x0_saved_regs.pwr_ctrl, base,
592 			      L310_POWER_CTRL);
593 }
594 
l2c310_starting_cpu(unsigned int cpu)595 static int l2c310_starting_cpu(unsigned int cpu)
596 {
597 	set_auxcr(get_auxcr() | BIT(3) | BIT(2) | BIT(1));
598 	return 0;
599 }
600 
l2c310_dying_cpu(unsigned int cpu)601 static int l2c310_dying_cpu(unsigned int cpu)
602 {
603 	set_auxcr(get_auxcr() & ~(BIT(3) | BIT(2) | BIT(1)));
604 	return 0;
605 }
606 
l2c310_enable(void __iomem * base,unsigned num_lock)607 static void __init l2c310_enable(void __iomem *base, unsigned num_lock)
608 {
609 	unsigned rev = readl_relaxed(base + L2X0_CACHE_ID) & L2X0_CACHE_ID_RTL_MASK;
610 	bool cortex_a9 = read_cpuid_part() == ARM_CPU_PART_CORTEX_A9;
611 	u32 aux = l2x0_saved_regs.aux_ctrl;
612 
613 	if (rev >= L310_CACHE_ID_RTL_R2P0) {
614 		if (cortex_a9 && !l2x0_bresp_disable) {
615 			aux |= L310_AUX_CTRL_EARLY_BRESP;
616 			pr_info("L2C-310 enabling early BRESP for Cortex-A9\n");
617 		} else if (aux & L310_AUX_CTRL_EARLY_BRESP) {
618 			pr_warn("L2C-310 early BRESP only supported with Cortex-A9\n");
619 			aux &= ~L310_AUX_CTRL_EARLY_BRESP;
620 		}
621 	}
622 
623 	if (cortex_a9 && !l2x0_flz_disable) {
624 		u32 aux_cur = readl_relaxed(base + L2X0_AUX_CTRL);
625 		u32 acr = get_auxcr();
626 
627 		pr_debug("Cortex-A9 ACR=0x%08x\n", acr);
628 
629 		if (acr & BIT(3) && !(aux_cur & L310_AUX_CTRL_FULL_LINE_ZERO))
630 			pr_err("L2C-310: full line of zeros enabled in Cortex-A9 but not L2C-310 - invalid\n");
631 
632 		if (aux & L310_AUX_CTRL_FULL_LINE_ZERO && !(acr & BIT(3)))
633 			pr_err("L2C-310: enabling full line of zeros but not enabled in Cortex-A9\n");
634 
635 		if (!(aux & L310_AUX_CTRL_FULL_LINE_ZERO) && !outer_cache.write_sec) {
636 			aux |= L310_AUX_CTRL_FULL_LINE_ZERO;
637 			pr_info("L2C-310 full line of zeros enabled for Cortex-A9\n");
638 		}
639 	} else if (aux & (L310_AUX_CTRL_FULL_LINE_ZERO | L310_AUX_CTRL_EARLY_BRESP)) {
640 		pr_err("L2C-310: disabling Cortex-A9 specific feature bits\n");
641 		aux &= ~(L310_AUX_CTRL_FULL_LINE_ZERO | L310_AUX_CTRL_EARLY_BRESP);
642 	}
643 
644 	/*
645 	 * Always enable non-secure access to the lockdown registers -
646 	 * we write to them as part of the L2C enable sequence so they
647 	 * need to be accessible.
648 	 */
649 	l2x0_saved_regs.aux_ctrl = aux | L310_AUX_CTRL_NS_LOCKDOWN;
650 
651 	l2c_enable(base, num_lock);
652 
653 	/* Read back resulting AUX_CTRL value as it could have been altered. */
654 	aux = readl_relaxed(base + L2X0_AUX_CTRL);
655 
656 	if (aux & (L310_AUX_CTRL_DATA_PREFETCH | L310_AUX_CTRL_INSTR_PREFETCH)) {
657 		u32 prefetch = readl_relaxed(base + L310_PREFETCH_CTRL);
658 
659 		pr_info("L2C-310 %s%s prefetch enabled, offset %u lines\n",
660 			aux & L310_AUX_CTRL_INSTR_PREFETCH ? "I" : "",
661 			aux & L310_AUX_CTRL_DATA_PREFETCH ? "D" : "",
662 			1 + (prefetch & L310_PREFETCH_CTRL_OFFSET_MASK));
663 	}
664 
665 	/* r3p0 or later has power control register */
666 	if (rev >= L310_CACHE_ID_RTL_R3P0) {
667 		u32 power_ctrl;
668 
669 		power_ctrl = readl_relaxed(base + L310_POWER_CTRL);
670 		pr_info("L2C-310 dynamic clock gating %sabled, standby mode %sabled\n",
671 			power_ctrl & L310_DYNAMIC_CLK_GATING_EN ? "en" : "dis",
672 			power_ctrl & L310_STNDBY_MODE_EN ? "en" : "dis");
673 	}
674 
675 	if (aux & L310_AUX_CTRL_FULL_LINE_ZERO)
676 		cpuhp_setup_state(CPUHP_AP_ARM_L2X0_STARTING,
677 				  "arm/l2x0:starting", l2c310_starting_cpu,
678 				  l2c310_dying_cpu);
679 }
680 
l2c310_fixup(void __iomem * base,u32 cache_id,struct outer_cache_fns * fns)681 static void __init l2c310_fixup(void __iomem *base, u32 cache_id,
682 	struct outer_cache_fns *fns)
683 {
684 	unsigned revision = cache_id & L2X0_CACHE_ID_RTL_MASK;
685 	const char *errata[8];
686 	unsigned n = 0;
687 
688 	if (IS_ENABLED(CONFIG_PL310_ERRATA_588369) &&
689 	    revision < L310_CACHE_ID_RTL_R2P0 &&
690 	    /* For bcm compatibility */
691 	    fns->inv_range == l2c210_inv_range) {
692 		fns->inv_range = l2c310_inv_range_erratum;
693 		fns->flush_range = l2c310_flush_range_erratum;
694 		errata[n++] = "588369";
695 	}
696 
697 	if (IS_ENABLED(CONFIG_PL310_ERRATA_727915) &&
698 	    revision >= L310_CACHE_ID_RTL_R2P0 &&
699 	    revision < L310_CACHE_ID_RTL_R3P1) {
700 		fns->flush_all = l2c310_flush_all_erratum;
701 		errata[n++] = "727915";
702 	}
703 
704 	if (revision >= L310_CACHE_ID_RTL_R3P0 &&
705 	    revision < L310_CACHE_ID_RTL_R3P2) {
706 		u32 val = l2x0_saved_regs.prefetch_ctrl;
707 		if (val & L310_PREFETCH_CTRL_DBL_LINEFILL) {
708 			val &= ~L310_PREFETCH_CTRL_DBL_LINEFILL;
709 			l2x0_saved_regs.prefetch_ctrl = val;
710 			errata[n++] = "752271";
711 		}
712 	}
713 
714 	if (IS_ENABLED(CONFIG_PL310_ERRATA_753970) &&
715 	    revision == L310_CACHE_ID_RTL_R3P0) {
716 		sync_reg_offset = L2X0_DUMMY_REG;
717 		errata[n++] = "753970";
718 	}
719 
720 	if (IS_ENABLED(CONFIG_PL310_ERRATA_769419))
721 		errata[n++] = "769419";
722 
723 	if (n) {
724 		unsigned i;
725 
726 		pr_info("L2C-310 errat%s", n > 1 ? "a" : "um");
727 		for (i = 0; i < n; i++)
728 			pr_cont(" %s", errata[i]);
729 		pr_cont(" enabled\n");
730 	}
731 }
732 
l2c310_disable(void)733 static void l2c310_disable(void)
734 {
735 	/*
736 	 * If full-line-of-zeros is enabled, we must first disable it in the
737 	 * Cortex-A9 auxiliary control register before disabling the L2 cache.
738 	 */
739 	if (l2x0_saved_regs.aux_ctrl & L310_AUX_CTRL_FULL_LINE_ZERO)
740 		set_auxcr(get_auxcr() & ~(BIT(3) | BIT(2) | BIT(1)));
741 
742 	l2c_disable();
743 }
744 
l2c310_resume(void)745 static void l2c310_resume(void)
746 {
747 	l2c_resume();
748 
749 	/* Re-enable full-line-of-zeros for Cortex-A9 */
750 	if (l2x0_saved_regs.aux_ctrl & L310_AUX_CTRL_FULL_LINE_ZERO)
751 		set_auxcr(get_auxcr() | BIT(3) | BIT(2) | BIT(1));
752 }
753 
l2c310_unlock(void __iomem * base,unsigned num_lock)754 static void l2c310_unlock(void __iomem *base, unsigned num_lock)
755 {
756 	if (readl_relaxed(base + L2X0_AUX_CTRL) & L310_AUX_CTRL_NS_LOCKDOWN)
757 		l2c_unlock(base, num_lock);
758 }
759 
760 static const struct l2c_init_data l2c310_init_fns __initconst = {
761 	.type = "L2C-310",
762 	.way_size_0 = SZ_8K,
763 	.num_lock = 8,
764 	.enable = l2c310_enable,
765 	.fixup = l2c310_fixup,
766 	.save = l2c310_save,
767 	.configure = l2c310_configure,
768 	.unlock = l2c310_unlock,
769 	.outer_cache = {
770 		.inv_range = l2c210_inv_range,
771 		.clean_range = l2c210_clean_range,
772 		.flush_range = l2c210_flush_range,
773 		.flush_all = l2c210_flush_all,
774 		.disable = l2c310_disable,
775 		.sync = l2c210_sync,
776 		.resume = l2c310_resume,
777 	},
778 };
779 
__l2c_init(const struct l2c_init_data * data,u32 aux_val,u32 aux_mask,u32 cache_id,bool nosync)780 static int __init __l2c_init(const struct l2c_init_data *data,
781 			     u32 aux_val, u32 aux_mask, u32 cache_id, bool nosync)
782 {
783 	struct outer_cache_fns fns;
784 	unsigned way_size_bits, ways;
785 	u32 aux, old_aux;
786 
787 	/*
788 	 * Save the pointer globally so that callbacks which do not receive
789 	 * context from callers can access the structure.
790 	 */
791 	l2x0_data = kmemdup(data, sizeof(*data), GFP_KERNEL);
792 	if (!l2x0_data)
793 		return -ENOMEM;
794 
795 	/*
796 	 * Sanity check the aux values.  aux_mask is the bits we preserve
797 	 * from reading the hardware register, and aux_val is the bits we
798 	 * set.
799 	 */
800 	if (aux_val & aux_mask)
801 		pr_alert("L2C: platform provided aux values permit register corruption.\n");
802 
803 	old_aux = aux = readl_relaxed(l2x0_base + L2X0_AUX_CTRL);
804 	aux &= aux_mask;
805 	aux |= aux_val;
806 
807 	if (old_aux != aux)
808 		pr_warn("L2C: DT/platform modifies aux control register: 0x%08x -> 0x%08x\n",
809 		        old_aux, aux);
810 
811 	/* Determine the number of ways */
812 	switch (cache_id & L2X0_CACHE_ID_PART_MASK) {
813 	case L2X0_CACHE_ID_PART_L310:
814 		if ((aux_val | ~aux_mask) & (L2C_AUX_CTRL_WAY_SIZE_MASK | L310_AUX_CTRL_ASSOCIATIVITY_16))
815 			pr_warn("L2C: DT/platform tries to modify or specify cache size\n");
816 		if (aux & (1 << 16))
817 			ways = 16;
818 		else
819 			ways = 8;
820 		break;
821 
822 	case L2X0_CACHE_ID_PART_L210:
823 	case L2X0_CACHE_ID_PART_L220:
824 		ways = (aux >> 13) & 0xf;
825 		break;
826 
827 	case AURORA_CACHE_ID:
828 		ways = (aux >> 13) & 0xf;
829 		ways = 2 << ((ways + 1) >> 2);
830 		break;
831 
832 	default:
833 		/* Assume unknown chips have 8 ways */
834 		ways = 8;
835 		break;
836 	}
837 
838 	l2x0_way_mask = (1 << ways) - 1;
839 
840 	/*
841 	 * way_size_0 is the size that a way_size value of zero would be
842 	 * given the calculation: way_size = way_size_0 << way_size_bits.
843 	 * So, if way_size_bits=0 is reserved, but way_size_bits=1 is 16k,
844 	 * then way_size_0 would be 8k.
845 	 *
846 	 * L2 cache size = number of ways * way size.
847 	 */
848 	way_size_bits = (aux & L2C_AUX_CTRL_WAY_SIZE_MASK) >>
849 			L2C_AUX_CTRL_WAY_SIZE_SHIFT;
850 	l2x0_size = ways * (data->way_size_0 << way_size_bits);
851 
852 	fns = data->outer_cache;
853 	fns.write_sec = outer_cache.write_sec;
854 	fns.configure = outer_cache.configure;
855 	if (data->fixup)
856 		data->fixup(l2x0_base, cache_id, &fns);
857 	if (nosync) {
858 		pr_info("L2C: disabling outer sync\n");
859 		fns.sync = NULL;
860 	}
861 
862 	/*
863 	 * Check if l2x0 controller is already enabled.  If we are booting
864 	 * in non-secure mode accessing the below registers will fault.
865 	 */
866 	if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) {
867 		l2x0_saved_regs.aux_ctrl = aux;
868 
869 		data->enable(l2x0_base, data->num_lock);
870 	}
871 
872 	outer_cache = fns;
873 
874 	/*
875 	 * It is strange to save the register state before initialisation,
876 	 * but hey, this is what the DT implementations decided to do.
877 	 */
878 	if (data->save)
879 		data->save(l2x0_base);
880 
881 	/* Re-read it in case some bits are reserved. */
882 	aux = readl_relaxed(l2x0_base + L2X0_AUX_CTRL);
883 
884 	pr_info("%s cache controller enabled, %d ways, %d kB\n",
885 		data->type, ways, l2x0_size >> 10);
886 	pr_info("%s: CACHE_ID 0x%08x, AUX_CTRL 0x%08x\n",
887 		data->type, cache_id, aux);
888 
889 	l2x0_pmu_register(l2x0_base, cache_id);
890 
891 	return 0;
892 }
893 
l2x0_init(void __iomem * base,u32 aux_val,u32 aux_mask)894 void __init l2x0_init(void __iomem *base, u32 aux_val, u32 aux_mask)
895 {
896 	const struct l2c_init_data *data;
897 	u32 cache_id;
898 
899 	l2x0_base = base;
900 
901 	cache_id = readl_relaxed(base + L2X0_CACHE_ID);
902 
903 	switch (cache_id & L2X0_CACHE_ID_PART_MASK) {
904 	default:
905 	case L2X0_CACHE_ID_PART_L210:
906 		data = &l2c210_data;
907 		break;
908 
909 	case L2X0_CACHE_ID_PART_L220:
910 		data = &l2c220_data;
911 		break;
912 
913 	case L2X0_CACHE_ID_PART_L310:
914 		data = &l2c310_init_fns;
915 		break;
916 	}
917 
918 	/* Read back current (default) hardware configuration */
919 	if (data->save)
920 		data->save(l2x0_base);
921 
922 	__l2c_init(data, aux_val, aux_mask, cache_id, false);
923 }
924 
925 #ifdef CONFIG_OF
926 static int l2_wt_override;
927 
928 /* Aurora don't have the cache ID register available, so we have to
929  * pass it though the device tree */
930 static u32 cache_id_part_number_from_dt;
931 
932 /**
933  * l2x0_cache_size_of_parse() - read cache size parameters from DT
934  * @np: the device tree node for the l2 cache
935  * @aux_val: pointer to machine-supplied auxilary register value, to
936  * be augmented by the call (bits to be set to 1)
937  * @aux_mask: pointer to machine-supplied auxilary register mask, to
938  * be augmented by the call (bits to be set to 0)
939  * @associativity: variable to return the calculated associativity in
940  * @max_way_size: the maximum size in bytes for the cache ways
941  */
l2x0_cache_size_of_parse(const struct device_node * np,u32 * aux_val,u32 * aux_mask,u32 * associativity,u32 max_way_size)942 static int __init l2x0_cache_size_of_parse(const struct device_node *np,
943 					    u32 *aux_val, u32 *aux_mask,
944 					    u32 *associativity,
945 					    u32 max_way_size)
946 {
947 	u32 mask = 0, val = 0;
948 	u32 cache_size = 0, sets = 0;
949 	u32 way_size_bits = 1;
950 	u32 way_size = 0;
951 	u32 block_size = 0;
952 	u32 line_size = 0;
953 
954 	of_property_read_u32(np, "cache-size", &cache_size);
955 	of_property_read_u32(np, "cache-sets", &sets);
956 	of_property_read_u32(np, "cache-block-size", &block_size);
957 	of_property_read_u32(np, "cache-line-size", &line_size);
958 
959 	if (!cache_size || !sets)
960 		return -ENODEV;
961 
962 	/* All these l2 caches have the same line = block size actually */
963 	if (!line_size) {
964 		if (block_size) {
965 			/* If linesize is not given, it is equal to blocksize */
966 			line_size = block_size;
967 		} else {
968 			/* Fall back to known size */
969 			pr_warn("L2C OF: no cache block/line size given: "
970 				"falling back to default size %d bytes\n",
971 				CACHE_LINE_SIZE);
972 			line_size = CACHE_LINE_SIZE;
973 		}
974 	}
975 
976 	if (line_size != CACHE_LINE_SIZE)
977 		pr_warn("L2C OF: DT supplied line size %d bytes does "
978 			"not match hardware line size of %d bytes\n",
979 			line_size,
980 			CACHE_LINE_SIZE);
981 
982 	/*
983 	 * Since:
984 	 * set size = cache size / sets
985 	 * ways = cache size / (sets * line size)
986 	 * way size = cache size / (cache size / (sets * line size))
987 	 * way size = sets * line size
988 	 * associativity = ways = cache size / way size
989 	 */
990 	way_size = sets * line_size;
991 	*associativity = cache_size / way_size;
992 
993 	if (way_size > max_way_size) {
994 		pr_err("L2C OF: set size %dKB is too large\n", way_size);
995 		return -EINVAL;
996 	}
997 
998 	pr_info("L2C OF: override cache size: %d bytes (%dKB)\n",
999 		cache_size, cache_size >> 10);
1000 	pr_info("L2C OF: override line size: %d bytes\n", line_size);
1001 	pr_info("L2C OF: override way size: %d bytes (%dKB)\n",
1002 		way_size, way_size >> 10);
1003 	pr_info("L2C OF: override associativity: %d\n", *associativity);
1004 
1005 	/*
1006 	 * Calculates the bits 17:19 to set for way size:
1007 	 * 512KB -> 6, 256KB -> 5, ... 16KB -> 1
1008 	 */
1009 	way_size_bits = ilog2(way_size >> 10) - 3;
1010 	if (way_size_bits < 1 || way_size_bits > 6) {
1011 		pr_err("L2C OF: cache way size illegal: %dKB is not mapped\n",
1012 		       way_size);
1013 		return -EINVAL;
1014 	}
1015 
1016 	mask |= L2C_AUX_CTRL_WAY_SIZE_MASK;
1017 	val |= (way_size_bits << L2C_AUX_CTRL_WAY_SIZE_SHIFT);
1018 
1019 	*aux_val &= ~mask;
1020 	*aux_val |= val;
1021 	*aux_mask &= ~mask;
1022 
1023 	return 0;
1024 }
1025 
l2x0_of_parse(const struct device_node * np,u32 * aux_val,u32 * aux_mask)1026 static void __init l2x0_of_parse(const struct device_node *np,
1027 				 u32 *aux_val, u32 *aux_mask)
1028 {
1029 	u32 data[2] = { 0, 0 };
1030 	u32 tag = 0;
1031 	u32 dirty = 0;
1032 	u32 val = 0, mask = 0;
1033 	u32 assoc;
1034 	int ret;
1035 
1036 	of_property_read_u32(np, "arm,tag-latency", &tag);
1037 	if (tag) {
1038 		mask |= L2X0_AUX_CTRL_TAG_LATENCY_MASK;
1039 		val |= (tag - 1) << L2X0_AUX_CTRL_TAG_LATENCY_SHIFT;
1040 	}
1041 
1042 	of_property_read_u32_array(np, "arm,data-latency",
1043 				   data, ARRAY_SIZE(data));
1044 	if (data[0] && data[1]) {
1045 		mask |= L2X0_AUX_CTRL_DATA_RD_LATENCY_MASK |
1046 			L2X0_AUX_CTRL_DATA_WR_LATENCY_MASK;
1047 		val |= ((data[0] - 1) << L2X0_AUX_CTRL_DATA_RD_LATENCY_SHIFT) |
1048 		       ((data[1] - 1) << L2X0_AUX_CTRL_DATA_WR_LATENCY_SHIFT);
1049 	}
1050 
1051 	of_property_read_u32(np, "arm,dirty-latency", &dirty);
1052 	if (dirty) {
1053 		mask |= L2X0_AUX_CTRL_DIRTY_LATENCY_MASK;
1054 		val |= (dirty - 1) << L2X0_AUX_CTRL_DIRTY_LATENCY_SHIFT;
1055 	}
1056 
1057 	if (of_property_read_bool(np, "arm,parity-enable")) {
1058 		mask &= ~L2C_AUX_CTRL_PARITY_ENABLE;
1059 		val |= L2C_AUX_CTRL_PARITY_ENABLE;
1060 	} else if (of_property_read_bool(np, "arm,parity-disable")) {
1061 		mask &= ~L2C_AUX_CTRL_PARITY_ENABLE;
1062 	}
1063 
1064 	if (of_property_read_bool(np, "arm,shared-override")) {
1065 		mask &= ~L2C_AUX_CTRL_SHARED_OVERRIDE;
1066 		val |= L2C_AUX_CTRL_SHARED_OVERRIDE;
1067 	}
1068 
1069 	ret = l2x0_cache_size_of_parse(np, aux_val, aux_mask, &assoc, SZ_256K);
1070 	if (ret)
1071 		return;
1072 
1073 	if (assoc > 8) {
1074 		pr_err("l2x0 of: cache setting yield too high associativity\n");
1075 		pr_err("l2x0 of: %d calculated, max 8\n", assoc);
1076 	} else {
1077 		mask |= L2X0_AUX_CTRL_ASSOC_MASK;
1078 		val |= (assoc << L2X0_AUX_CTRL_ASSOC_SHIFT);
1079 	}
1080 
1081 	*aux_val &= ~mask;
1082 	*aux_val |= val;
1083 	*aux_mask &= ~mask;
1084 }
1085 
1086 static const struct l2c_init_data of_l2c210_data __initconst = {
1087 	.type = "L2C-210",
1088 	.way_size_0 = SZ_8K,
1089 	.num_lock = 1,
1090 	.of_parse = l2x0_of_parse,
1091 	.enable = l2c_enable,
1092 	.save = l2c_save,
1093 	.configure = l2c_configure,
1094 	.unlock = l2c_unlock,
1095 	.outer_cache = {
1096 		.inv_range   = l2c210_inv_range,
1097 		.clean_range = l2c210_clean_range,
1098 		.flush_range = l2c210_flush_range,
1099 		.flush_all   = l2c210_flush_all,
1100 		.disable     = l2c_disable,
1101 		.sync        = l2c210_sync,
1102 		.resume      = l2c_resume,
1103 	},
1104 };
1105 
1106 static const struct l2c_init_data of_l2c220_data __initconst = {
1107 	.type = "L2C-220",
1108 	.way_size_0 = SZ_8K,
1109 	.num_lock = 1,
1110 	.of_parse = l2x0_of_parse,
1111 	.enable = l2c220_enable,
1112 	.save = l2c_save,
1113 	.configure = l2c_configure,
1114 	.unlock = l2c220_unlock,
1115 	.outer_cache = {
1116 		.inv_range   = l2c220_inv_range,
1117 		.clean_range = l2c220_clean_range,
1118 		.flush_range = l2c220_flush_range,
1119 		.flush_all   = l2c220_flush_all,
1120 		.disable     = l2c_disable,
1121 		.sync        = l2c220_sync,
1122 		.resume      = l2c_resume,
1123 	},
1124 };
1125 
l2c310_of_parse(const struct device_node * np,u32 * aux_val,u32 * aux_mask)1126 static void __init l2c310_of_parse(const struct device_node *np,
1127 	u32 *aux_val, u32 *aux_mask)
1128 {
1129 	u32 data[3] = { 0, 0, 0 };
1130 	u32 tag[3] = { 0, 0, 0 };
1131 	u32 filter[2] = { 0, 0 };
1132 	u32 assoc;
1133 	u32 prefetch;
1134 	u32 power;
1135 	u32 val;
1136 	int ret;
1137 
1138 	of_property_read_u32_array(np, "arm,tag-latency", tag, ARRAY_SIZE(tag));
1139 	if (tag[0] && tag[1] && tag[2])
1140 		l2x0_saved_regs.tag_latency =
1141 			L310_LATENCY_CTRL_RD(tag[0] - 1) |
1142 			L310_LATENCY_CTRL_WR(tag[1] - 1) |
1143 			L310_LATENCY_CTRL_SETUP(tag[2] - 1);
1144 
1145 	of_property_read_u32_array(np, "arm,data-latency",
1146 				   data, ARRAY_SIZE(data));
1147 	if (data[0] && data[1] && data[2])
1148 		l2x0_saved_regs.data_latency =
1149 			L310_LATENCY_CTRL_RD(data[0] - 1) |
1150 			L310_LATENCY_CTRL_WR(data[1] - 1) |
1151 			L310_LATENCY_CTRL_SETUP(data[2] - 1);
1152 
1153 	of_property_read_u32_array(np, "arm,filter-ranges",
1154 				   filter, ARRAY_SIZE(filter));
1155 	if (filter[1]) {
1156 		l2x0_saved_regs.filter_end =
1157 					ALIGN(filter[0] + filter[1], SZ_1M);
1158 		l2x0_saved_regs.filter_start = (filter[0] & ~(SZ_1M - 1))
1159 					| L310_ADDR_FILTER_EN;
1160 	}
1161 
1162 	ret = l2x0_cache_size_of_parse(np, aux_val, aux_mask, &assoc, SZ_512K);
1163 	if (!ret) {
1164 		switch (assoc) {
1165 		case 16:
1166 			*aux_val &= ~L2X0_AUX_CTRL_ASSOC_MASK;
1167 			*aux_val |= L310_AUX_CTRL_ASSOCIATIVITY_16;
1168 			*aux_mask &= ~L2X0_AUX_CTRL_ASSOC_MASK;
1169 			break;
1170 		case 8:
1171 			*aux_val &= ~L2X0_AUX_CTRL_ASSOC_MASK;
1172 			*aux_mask &= ~L2X0_AUX_CTRL_ASSOC_MASK;
1173 			break;
1174 		default:
1175 			pr_err("L2C-310 OF cache associativity %d invalid, only 8 or 16 permitted\n",
1176 			       assoc);
1177 			break;
1178 		}
1179 	}
1180 
1181 	if (of_property_read_bool(np, "arm,shared-override")) {
1182 		*aux_val |= L2C_AUX_CTRL_SHARED_OVERRIDE;
1183 		*aux_mask &= ~L2C_AUX_CTRL_SHARED_OVERRIDE;
1184 	}
1185 
1186 	if (of_property_read_bool(np, "arm,parity-enable")) {
1187 		*aux_val |= L2C_AUX_CTRL_PARITY_ENABLE;
1188 		*aux_mask &= ~L2C_AUX_CTRL_PARITY_ENABLE;
1189 	} else if (of_property_read_bool(np, "arm,parity-disable")) {
1190 		*aux_val &= ~L2C_AUX_CTRL_PARITY_ENABLE;
1191 		*aux_mask &= ~L2C_AUX_CTRL_PARITY_ENABLE;
1192 	}
1193 
1194 	if (of_property_read_bool(np, "arm,early-bresp-disable"))
1195 		l2x0_bresp_disable = true;
1196 
1197 	if (of_property_read_bool(np, "arm,full-line-zero-disable"))
1198 		l2x0_flz_disable = true;
1199 
1200 	prefetch = l2x0_saved_regs.prefetch_ctrl;
1201 
1202 	ret = of_property_read_u32(np, "arm,double-linefill", &val);
1203 	if (ret == 0) {
1204 		if (val)
1205 			prefetch |= L310_PREFETCH_CTRL_DBL_LINEFILL;
1206 		else
1207 			prefetch &= ~L310_PREFETCH_CTRL_DBL_LINEFILL;
1208 	} else if (ret != -EINVAL) {
1209 		pr_err("L2C-310 OF arm,double-linefill property value is missing\n");
1210 	}
1211 
1212 	ret = of_property_read_u32(np, "arm,double-linefill-incr", &val);
1213 	if (ret == 0) {
1214 		if (val)
1215 			prefetch |= L310_PREFETCH_CTRL_DBL_LINEFILL_INCR;
1216 		else
1217 			prefetch &= ~L310_PREFETCH_CTRL_DBL_LINEFILL_INCR;
1218 	} else if (ret != -EINVAL) {
1219 		pr_err("L2C-310 OF arm,double-linefill-incr property value is missing\n");
1220 	}
1221 
1222 	ret = of_property_read_u32(np, "arm,double-linefill-wrap", &val);
1223 	if (ret == 0) {
1224 		if (!val)
1225 			prefetch |= L310_PREFETCH_CTRL_DBL_LINEFILL_WRAP;
1226 		else
1227 			prefetch &= ~L310_PREFETCH_CTRL_DBL_LINEFILL_WRAP;
1228 	} else if (ret != -EINVAL) {
1229 		pr_err("L2C-310 OF arm,double-linefill-wrap property value is missing\n");
1230 	}
1231 
1232 	ret = of_property_read_u32(np, "arm,prefetch-drop", &val);
1233 	if (ret == 0) {
1234 		if (val)
1235 			prefetch |= L310_PREFETCH_CTRL_PREFETCH_DROP;
1236 		else
1237 			prefetch &= ~L310_PREFETCH_CTRL_PREFETCH_DROP;
1238 	} else if (ret != -EINVAL) {
1239 		pr_err("L2C-310 OF arm,prefetch-drop property value is missing\n");
1240 	}
1241 
1242 	ret = of_property_read_u32(np, "arm,prefetch-offset", &val);
1243 	if (ret == 0) {
1244 		prefetch &= ~L310_PREFETCH_CTRL_OFFSET_MASK;
1245 		prefetch |= val & L310_PREFETCH_CTRL_OFFSET_MASK;
1246 	} else if (ret != -EINVAL) {
1247 		pr_err("L2C-310 OF arm,prefetch-offset property value is missing\n");
1248 	}
1249 
1250 	ret = of_property_read_u32(np, "prefetch-data", &val);
1251 	if (ret == 0) {
1252 		if (val) {
1253 			prefetch |= L310_PREFETCH_CTRL_DATA_PREFETCH;
1254 			*aux_val |= L310_PREFETCH_CTRL_DATA_PREFETCH;
1255 		} else {
1256 			prefetch &= ~L310_PREFETCH_CTRL_DATA_PREFETCH;
1257 			*aux_val &= ~L310_PREFETCH_CTRL_DATA_PREFETCH;
1258 		}
1259 		*aux_mask &= ~L310_PREFETCH_CTRL_DATA_PREFETCH;
1260 	} else if (ret != -EINVAL) {
1261 		pr_err("L2C-310 OF prefetch-data property value is missing\n");
1262 	}
1263 
1264 	ret = of_property_read_u32(np, "prefetch-instr", &val);
1265 	if (ret == 0) {
1266 		if (val) {
1267 			prefetch |= L310_PREFETCH_CTRL_INSTR_PREFETCH;
1268 			*aux_val |= L310_PREFETCH_CTRL_INSTR_PREFETCH;
1269 		} else {
1270 			prefetch &= ~L310_PREFETCH_CTRL_INSTR_PREFETCH;
1271 			*aux_val &= ~L310_PREFETCH_CTRL_INSTR_PREFETCH;
1272 		}
1273 		*aux_mask &= ~L310_PREFETCH_CTRL_INSTR_PREFETCH;
1274 	} else if (ret != -EINVAL) {
1275 		pr_err("L2C-310 OF prefetch-instr property value is missing\n");
1276 	}
1277 
1278 	l2x0_saved_regs.prefetch_ctrl = prefetch;
1279 
1280 	power = l2x0_saved_regs.pwr_ctrl |
1281 		L310_DYNAMIC_CLK_GATING_EN | L310_STNDBY_MODE_EN;
1282 
1283 	ret = of_property_read_u32(np, "arm,dynamic-clock-gating", &val);
1284 	if (!ret) {
1285 		if (!val)
1286 			power &= ~L310_DYNAMIC_CLK_GATING_EN;
1287 	} else if (ret != -EINVAL) {
1288 		pr_err("L2C-310 OF dynamic-clock-gating property value is missing or invalid\n");
1289 	}
1290 	ret = of_property_read_u32(np, "arm,standby-mode", &val);
1291 	if (!ret) {
1292 		if (!val)
1293 			power &= ~L310_STNDBY_MODE_EN;
1294 	} else if (ret != -EINVAL) {
1295 		pr_err("L2C-310 OF standby-mode property value is missing or invalid\n");
1296 	}
1297 
1298 	l2x0_saved_regs.pwr_ctrl = power;
1299 }
1300 
1301 static const struct l2c_init_data of_l2c310_data __initconst = {
1302 	.type = "L2C-310",
1303 	.way_size_0 = SZ_8K,
1304 	.num_lock = 8,
1305 	.of_parse = l2c310_of_parse,
1306 	.enable = l2c310_enable,
1307 	.fixup = l2c310_fixup,
1308 	.save  = l2c310_save,
1309 	.configure = l2c310_configure,
1310 	.unlock = l2c310_unlock,
1311 	.outer_cache = {
1312 		.inv_range   = l2c210_inv_range,
1313 		.clean_range = l2c210_clean_range,
1314 		.flush_range = l2c210_flush_range,
1315 		.flush_all   = l2c210_flush_all,
1316 		.disable     = l2c310_disable,
1317 		.sync        = l2c210_sync,
1318 		.resume      = l2c310_resume,
1319 	},
1320 };
1321 
1322 /*
1323  * This is a variant of the of_l2c310_data with .sync set to
1324  * NULL. Outer sync operations are not needed when the system is I/O
1325  * coherent, and potentially harmful in certain situations (PCIe/PL310
1326  * deadlock on Armada 375/38x due to hardware I/O coherency). The
1327  * other operations are kept because they are infrequent (therefore do
1328  * not cause the deadlock in practice) and needed for secondary CPU
1329  * boot and other power management activities.
1330  */
1331 static const struct l2c_init_data of_l2c310_coherent_data __initconst = {
1332 	.type = "L2C-310 Coherent",
1333 	.way_size_0 = SZ_8K,
1334 	.num_lock = 8,
1335 	.of_parse = l2c310_of_parse,
1336 	.enable = l2c310_enable,
1337 	.fixup = l2c310_fixup,
1338 	.save  = l2c310_save,
1339 	.configure = l2c310_configure,
1340 	.unlock = l2c310_unlock,
1341 	.outer_cache = {
1342 		.inv_range   = l2c210_inv_range,
1343 		.clean_range = l2c210_clean_range,
1344 		.flush_range = l2c210_flush_range,
1345 		.flush_all   = l2c210_flush_all,
1346 		.disable     = l2c310_disable,
1347 		.resume      = l2c310_resume,
1348 	},
1349 };
1350 
1351 /*
1352  * Note that the end addresses passed to Linux primitives are
1353  * noninclusive, while the hardware cache range operations use
1354  * inclusive start and end addresses.
1355  */
aurora_range_end(unsigned long start,unsigned long end)1356 static unsigned long aurora_range_end(unsigned long start, unsigned long end)
1357 {
1358 	/*
1359 	 * Limit the number of cache lines processed at once,
1360 	 * since cache range operations stall the CPU pipeline
1361 	 * until completion.
1362 	 */
1363 	if (end > start + AURORA_MAX_RANGE_SIZE)
1364 		end = start + AURORA_MAX_RANGE_SIZE;
1365 
1366 	/*
1367 	 * Cache range operations can't straddle a page boundary.
1368 	 */
1369 	if (end > PAGE_ALIGN(start+1))
1370 		end = PAGE_ALIGN(start+1);
1371 
1372 	return end;
1373 }
1374 
aurora_pa_range(unsigned long start,unsigned long end,unsigned long offset)1375 static void aurora_pa_range(unsigned long start, unsigned long end,
1376 			    unsigned long offset)
1377 {
1378 	void __iomem *base = l2x0_base;
1379 	unsigned long range_end;
1380 	unsigned long flags;
1381 
1382 	/*
1383 	 * round start and end adresses up to cache line size
1384 	 */
1385 	start &= ~(CACHE_LINE_SIZE - 1);
1386 	end = ALIGN(end, CACHE_LINE_SIZE);
1387 
1388 	/*
1389 	 * perform operation on all full cache lines between 'start' and 'end'
1390 	 */
1391 	while (start < end) {
1392 		range_end = aurora_range_end(start, end);
1393 
1394 		raw_spin_lock_irqsave(&l2x0_lock, flags);
1395 		writel_relaxed(start, base + AURORA_RANGE_BASE_ADDR_REG);
1396 		writel_relaxed(range_end - CACHE_LINE_SIZE, base + offset);
1397 		raw_spin_unlock_irqrestore(&l2x0_lock, flags);
1398 
1399 		writel_relaxed(0, base + AURORA_SYNC_REG);
1400 		start = range_end;
1401 	}
1402 }
aurora_inv_range(unsigned long start,unsigned long end)1403 static void aurora_inv_range(unsigned long start, unsigned long end)
1404 {
1405 	aurora_pa_range(start, end, AURORA_INVAL_RANGE_REG);
1406 }
1407 
aurora_clean_range(unsigned long start,unsigned long end)1408 static void aurora_clean_range(unsigned long start, unsigned long end)
1409 {
1410 	/*
1411 	 * If L2 is forced to WT, the L2 will always be clean and we
1412 	 * don't need to do anything here.
1413 	 */
1414 	if (!l2_wt_override)
1415 		aurora_pa_range(start, end, AURORA_CLEAN_RANGE_REG);
1416 }
1417 
aurora_flush_range(unsigned long start,unsigned long end)1418 static void aurora_flush_range(unsigned long start, unsigned long end)
1419 {
1420 	if (l2_wt_override)
1421 		aurora_pa_range(start, end, AURORA_INVAL_RANGE_REG);
1422 	else
1423 		aurora_pa_range(start, end, AURORA_FLUSH_RANGE_REG);
1424 }
1425 
aurora_flush_all(void)1426 static void aurora_flush_all(void)
1427 {
1428 	void __iomem *base = l2x0_base;
1429 	unsigned long flags;
1430 
1431 	/* clean all ways */
1432 	raw_spin_lock_irqsave(&l2x0_lock, flags);
1433 	__l2c_op_way(base + L2X0_CLEAN_INV_WAY);
1434 	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
1435 
1436 	writel_relaxed(0, base + AURORA_SYNC_REG);
1437 }
1438 
aurora_cache_sync(void)1439 static void aurora_cache_sync(void)
1440 {
1441 	writel_relaxed(0, l2x0_base + AURORA_SYNC_REG);
1442 }
1443 
aurora_disable(void)1444 static void aurora_disable(void)
1445 {
1446 	void __iomem *base = l2x0_base;
1447 	unsigned long flags;
1448 
1449 	raw_spin_lock_irqsave(&l2x0_lock, flags);
1450 	__l2c_op_way(base + L2X0_CLEAN_INV_WAY);
1451 	writel_relaxed(0, base + AURORA_SYNC_REG);
1452 	l2c_write_sec(0, base, L2X0_CTRL);
1453 	dsb(st);
1454 	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
1455 }
1456 
aurora_save(void __iomem * base)1457 static void aurora_save(void __iomem *base)
1458 {
1459 	l2x0_saved_regs.ctrl = readl_relaxed(base + L2X0_CTRL);
1460 	l2x0_saved_regs.aux_ctrl = readl_relaxed(base + L2X0_AUX_CTRL);
1461 }
1462 
1463 /*
1464  * For Aurora cache in no outer mode, enable via the CP15 coprocessor
1465  * broadcasting of cache commands to L2.
1466  */
aurora_enable_no_outer(void __iomem * base,unsigned num_lock)1467 static void __init aurora_enable_no_outer(void __iomem *base,
1468 	unsigned num_lock)
1469 {
1470 	u32 u;
1471 
1472 	asm volatile("mrc p15, 1, %0, c15, c2, 0" : "=r" (u));
1473 	u |= AURORA_CTRL_FW;		/* Set the FW bit */
1474 	asm volatile("mcr p15, 1, %0, c15, c2, 0" : : "r" (u));
1475 
1476 	isb();
1477 
1478 	l2c_enable(base, num_lock);
1479 }
1480 
aurora_fixup(void __iomem * base,u32 cache_id,struct outer_cache_fns * fns)1481 static void __init aurora_fixup(void __iomem *base, u32 cache_id,
1482 	struct outer_cache_fns *fns)
1483 {
1484 	sync_reg_offset = AURORA_SYNC_REG;
1485 }
1486 
aurora_of_parse(const struct device_node * np,u32 * aux_val,u32 * aux_mask)1487 static void __init aurora_of_parse(const struct device_node *np,
1488 				u32 *aux_val, u32 *aux_mask)
1489 {
1490 	u32 val = AURORA_ACR_REPLACEMENT_TYPE_SEMIPLRU;
1491 	u32 mask =  AURORA_ACR_REPLACEMENT_MASK;
1492 
1493 	of_property_read_u32(np, "cache-id-part",
1494 			&cache_id_part_number_from_dt);
1495 
1496 	/* Determine and save the write policy */
1497 	l2_wt_override = of_property_read_bool(np, "wt-override");
1498 
1499 	if (l2_wt_override) {
1500 		val |= AURORA_ACR_FORCE_WRITE_THRO_POLICY;
1501 		mask |= AURORA_ACR_FORCE_WRITE_POLICY_MASK;
1502 	}
1503 
1504 	if (of_property_read_bool(np, "marvell,ecc-enable")) {
1505 		mask |= AURORA_ACR_ECC_EN;
1506 		val |= AURORA_ACR_ECC_EN;
1507 	}
1508 
1509 	if (of_property_read_bool(np, "arm,parity-enable")) {
1510 		mask |= AURORA_ACR_PARITY_EN;
1511 		val |= AURORA_ACR_PARITY_EN;
1512 	} else if (of_property_read_bool(np, "arm,parity-disable")) {
1513 		mask |= AURORA_ACR_PARITY_EN;
1514 	}
1515 
1516 	*aux_val &= ~mask;
1517 	*aux_val |= val;
1518 	*aux_mask &= ~mask;
1519 }
1520 
1521 static const struct l2c_init_data of_aurora_with_outer_data __initconst = {
1522 	.type = "Aurora",
1523 	.way_size_0 = SZ_4K,
1524 	.num_lock = 4,
1525 	.of_parse = aurora_of_parse,
1526 	.enable = l2c_enable,
1527 	.fixup = aurora_fixup,
1528 	.save  = aurora_save,
1529 	.configure = l2c_configure,
1530 	.unlock = l2c_unlock,
1531 	.outer_cache = {
1532 		.inv_range   = aurora_inv_range,
1533 		.clean_range = aurora_clean_range,
1534 		.flush_range = aurora_flush_range,
1535 		.flush_all   = aurora_flush_all,
1536 		.disable     = aurora_disable,
1537 		.sync	     = aurora_cache_sync,
1538 		.resume      = l2c_resume,
1539 	},
1540 };
1541 
1542 static const struct l2c_init_data of_aurora_no_outer_data __initconst = {
1543 	.type = "Aurora",
1544 	.way_size_0 = SZ_4K,
1545 	.num_lock = 4,
1546 	.of_parse = aurora_of_parse,
1547 	.enable = aurora_enable_no_outer,
1548 	.fixup = aurora_fixup,
1549 	.save  = aurora_save,
1550 	.configure = l2c_configure,
1551 	.unlock = l2c_unlock,
1552 	.outer_cache = {
1553 		.resume      = l2c_resume,
1554 	},
1555 };
1556 
1557 /*
1558  * For certain Broadcom SoCs, depending on the address range, different offsets
1559  * need to be added to the address before passing it to L2 for
1560  * invalidation/clean/flush
1561  *
1562  * Section Address Range              Offset        EMI
1563  *   1     0x00000000 - 0x3FFFFFFF    0x80000000    VC
1564  *   2     0x40000000 - 0xBFFFFFFF    0x40000000    SYS
1565  *   3     0xC0000000 - 0xFFFFFFFF    0x80000000    VC
1566  *
1567  * When the start and end addresses have crossed two different sections, we
1568  * need to break the L2 operation into two, each within its own section.
1569  * For example, if we need to invalidate addresses starts at 0xBFFF0000 and
1570  * ends at 0xC0001000, we need do invalidate 1) 0xBFFF0000 - 0xBFFFFFFF and 2)
1571  * 0xC0000000 - 0xC0001000
1572  *
1573  * Note 1:
1574  * By breaking a single L2 operation into two, we may potentially suffer some
1575  * performance hit, but keep in mind the cross section case is very rare
1576  *
1577  * Note 2:
1578  * We do not need to handle the case when the start address is in
1579  * Section 1 and the end address is in Section 3, since it is not a valid use
1580  * case
1581  *
1582  * Note 3:
1583  * Section 1 in practical terms can no longer be used on rev A2. Because of
1584  * that the code does not need to handle section 1 at all.
1585  *
1586  */
1587 #define BCM_SYS_EMI_START_ADDR        0x40000000UL
1588 #define BCM_VC_EMI_SEC3_START_ADDR    0xC0000000UL
1589 
1590 #define BCM_SYS_EMI_OFFSET            0x40000000UL
1591 #define BCM_VC_EMI_OFFSET             0x80000000UL
1592 
bcm_addr_is_sys_emi(unsigned long addr)1593 static inline int bcm_addr_is_sys_emi(unsigned long addr)
1594 {
1595 	return (addr >= BCM_SYS_EMI_START_ADDR) &&
1596 		(addr < BCM_VC_EMI_SEC3_START_ADDR);
1597 }
1598 
bcm_l2_phys_addr(unsigned long addr)1599 static inline unsigned long bcm_l2_phys_addr(unsigned long addr)
1600 {
1601 	if (bcm_addr_is_sys_emi(addr))
1602 		return addr + BCM_SYS_EMI_OFFSET;
1603 	else
1604 		return addr + BCM_VC_EMI_OFFSET;
1605 }
1606 
bcm_inv_range(unsigned long start,unsigned long end)1607 static void bcm_inv_range(unsigned long start, unsigned long end)
1608 {
1609 	unsigned long new_start, new_end;
1610 
1611 	BUG_ON(start < BCM_SYS_EMI_START_ADDR);
1612 
1613 	if (unlikely(end <= start))
1614 		return;
1615 
1616 	new_start = bcm_l2_phys_addr(start);
1617 	new_end = bcm_l2_phys_addr(end);
1618 
1619 	/* normal case, no cross section between start and end */
1620 	if (likely(bcm_addr_is_sys_emi(end) || !bcm_addr_is_sys_emi(start))) {
1621 		l2c210_inv_range(new_start, new_end);
1622 		return;
1623 	}
1624 
1625 	/* They cross sections, so it can only be a cross from section
1626 	 * 2 to section 3
1627 	 */
1628 	l2c210_inv_range(new_start,
1629 		bcm_l2_phys_addr(BCM_VC_EMI_SEC3_START_ADDR-1));
1630 	l2c210_inv_range(bcm_l2_phys_addr(BCM_VC_EMI_SEC3_START_ADDR),
1631 		new_end);
1632 }
1633 
bcm_clean_range(unsigned long start,unsigned long end)1634 static void bcm_clean_range(unsigned long start, unsigned long end)
1635 {
1636 	unsigned long new_start, new_end;
1637 
1638 	BUG_ON(start < BCM_SYS_EMI_START_ADDR);
1639 
1640 	if (unlikely(end <= start))
1641 		return;
1642 
1643 	new_start = bcm_l2_phys_addr(start);
1644 	new_end = bcm_l2_phys_addr(end);
1645 
1646 	/* normal case, no cross section between start and end */
1647 	if (likely(bcm_addr_is_sys_emi(end) || !bcm_addr_is_sys_emi(start))) {
1648 		l2c210_clean_range(new_start, new_end);
1649 		return;
1650 	}
1651 
1652 	/* They cross sections, so it can only be a cross from section
1653 	 * 2 to section 3
1654 	 */
1655 	l2c210_clean_range(new_start,
1656 		bcm_l2_phys_addr(BCM_VC_EMI_SEC3_START_ADDR-1));
1657 	l2c210_clean_range(bcm_l2_phys_addr(BCM_VC_EMI_SEC3_START_ADDR),
1658 		new_end);
1659 }
1660 
bcm_flush_range(unsigned long start,unsigned long end)1661 static void bcm_flush_range(unsigned long start, unsigned long end)
1662 {
1663 	unsigned long new_start, new_end;
1664 
1665 	BUG_ON(start < BCM_SYS_EMI_START_ADDR);
1666 
1667 	if (unlikely(end <= start))
1668 		return;
1669 
1670 	if ((end - start) >= l2x0_size) {
1671 		outer_cache.flush_all();
1672 		return;
1673 	}
1674 
1675 	new_start = bcm_l2_phys_addr(start);
1676 	new_end = bcm_l2_phys_addr(end);
1677 
1678 	/* normal case, no cross section between start and end */
1679 	if (likely(bcm_addr_is_sys_emi(end) || !bcm_addr_is_sys_emi(start))) {
1680 		l2c210_flush_range(new_start, new_end);
1681 		return;
1682 	}
1683 
1684 	/* They cross sections, so it can only be a cross from section
1685 	 * 2 to section 3
1686 	 */
1687 	l2c210_flush_range(new_start,
1688 		bcm_l2_phys_addr(BCM_VC_EMI_SEC3_START_ADDR-1));
1689 	l2c210_flush_range(bcm_l2_phys_addr(BCM_VC_EMI_SEC3_START_ADDR),
1690 		new_end);
1691 }
1692 
1693 /* Broadcom L2C-310 start from ARMs R3P2 or later, and require no fixups */
1694 static const struct l2c_init_data of_bcm_l2x0_data __initconst = {
1695 	.type = "BCM-L2C-310",
1696 	.way_size_0 = SZ_8K,
1697 	.num_lock = 8,
1698 	.of_parse = l2c310_of_parse,
1699 	.enable = l2c310_enable,
1700 	.save  = l2c310_save,
1701 	.configure = l2c310_configure,
1702 	.unlock = l2c310_unlock,
1703 	.outer_cache = {
1704 		.inv_range   = bcm_inv_range,
1705 		.clean_range = bcm_clean_range,
1706 		.flush_range = bcm_flush_range,
1707 		.flush_all   = l2c210_flush_all,
1708 		.disable     = l2c310_disable,
1709 		.sync        = l2c210_sync,
1710 		.resume      = l2c310_resume,
1711 	},
1712 };
1713 
tauros3_save(void __iomem * base)1714 static void __init tauros3_save(void __iomem *base)
1715 {
1716 	l2c_save(base);
1717 
1718 	l2x0_saved_regs.aux2_ctrl =
1719 		readl_relaxed(base + TAUROS3_AUX2_CTRL);
1720 	l2x0_saved_regs.prefetch_ctrl =
1721 		readl_relaxed(base + L310_PREFETCH_CTRL);
1722 }
1723 
tauros3_configure(void __iomem * base)1724 static void tauros3_configure(void __iomem *base)
1725 {
1726 	l2c_configure(base);
1727 	writel_relaxed(l2x0_saved_regs.aux2_ctrl,
1728 		       base + TAUROS3_AUX2_CTRL);
1729 	writel_relaxed(l2x0_saved_regs.prefetch_ctrl,
1730 		       base + L310_PREFETCH_CTRL);
1731 }
1732 
1733 static const struct l2c_init_data of_tauros3_data __initconst = {
1734 	.type = "Tauros3",
1735 	.way_size_0 = SZ_8K,
1736 	.num_lock = 8,
1737 	.enable = l2c_enable,
1738 	.save  = tauros3_save,
1739 	.configure = tauros3_configure,
1740 	.unlock = l2c_unlock,
1741 	/* Tauros3 broadcasts L1 cache operations to L2 */
1742 	.outer_cache = {
1743 		.resume      = l2c_resume,
1744 	},
1745 };
1746 
1747 #define L2C_ID(name, fns) { .compatible = name, .data = (void *)&fns }
1748 static const struct of_device_id l2x0_ids[] __initconst = {
1749 	L2C_ID("arm,l210-cache", of_l2c210_data),
1750 	L2C_ID("arm,l220-cache", of_l2c220_data),
1751 	L2C_ID("arm,pl310-cache", of_l2c310_data),
1752 	L2C_ID("brcm,bcm11351-a2-pl310-cache", of_bcm_l2x0_data),
1753 	L2C_ID("marvell,aurora-outer-cache", of_aurora_with_outer_data),
1754 	L2C_ID("marvell,aurora-system-cache", of_aurora_no_outer_data),
1755 	L2C_ID("marvell,tauros3-cache", of_tauros3_data),
1756 	/* Deprecated IDs */
1757 	L2C_ID("bcm,bcm11351-a2-pl310-cache", of_bcm_l2x0_data),
1758 	{}
1759 };
1760 
l2x0_of_init(u32 aux_val,u32 aux_mask)1761 int __init l2x0_of_init(u32 aux_val, u32 aux_mask)
1762 {
1763 	const struct l2c_init_data *data;
1764 	struct device_node *np;
1765 	struct resource res;
1766 	u32 cache_id, old_aux;
1767 	u32 cache_level = 2;
1768 	bool nosync = false;
1769 
1770 	np = of_find_matching_node(NULL, l2x0_ids);
1771 	if (!np)
1772 		return -ENODEV;
1773 
1774 	if (of_address_to_resource(np, 0, &res))
1775 		return -ENODEV;
1776 
1777 	l2x0_base = ioremap(res.start, resource_size(&res));
1778 	if (!l2x0_base)
1779 		return -ENOMEM;
1780 
1781 	l2x0_saved_regs.phy_base = res.start;
1782 
1783 	data = of_match_node(l2x0_ids, np)->data;
1784 
1785 	if (of_device_is_compatible(np, "arm,pl310-cache") &&
1786 	    of_property_read_bool(np, "arm,io-coherent"))
1787 		data = &of_l2c310_coherent_data;
1788 
1789 	old_aux = readl_relaxed(l2x0_base + L2X0_AUX_CTRL);
1790 	if (old_aux != ((old_aux & aux_mask) | aux_val)) {
1791 		pr_warn("L2C: platform modifies aux control register: 0x%08x -> 0x%08x\n",
1792 		        old_aux, (old_aux & aux_mask) | aux_val);
1793 	} else if (aux_mask != ~0U && aux_val != 0) {
1794 		pr_alert("L2C: platform provided aux values match the hardware, so have no effect.  Please remove them.\n");
1795 	}
1796 
1797 	/* All L2 caches are unified, so this property should be specified */
1798 	if (!of_property_read_bool(np, "cache-unified"))
1799 		pr_err("L2C: device tree omits to specify unified cache\n");
1800 
1801 	if (of_property_read_u32(np, "cache-level", &cache_level))
1802 		pr_err("L2C: device tree omits to specify cache-level\n");
1803 
1804 	if (cache_level != 2)
1805 		pr_err("L2C: device tree specifies invalid cache level\n");
1806 
1807 	nosync = of_property_read_bool(np, "arm,outer-sync-disable");
1808 
1809 	/* Read back current (default) hardware configuration */
1810 	if (data->save)
1811 		data->save(l2x0_base);
1812 
1813 	/* L2 configuration can only be changed if the cache is disabled */
1814 	if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN))
1815 		if (data->of_parse)
1816 			data->of_parse(np, &aux_val, &aux_mask);
1817 
1818 	if (cache_id_part_number_from_dt)
1819 		cache_id = cache_id_part_number_from_dt;
1820 	else
1821 		cache_id = readl_relaxed(l2x0_base + L2X0_CACHE_ID);
1822 
1823 	return __l2c_init(data, aux_val, aux_mask, cache_id, nosync);
1824 }
1825 #endif
1826