Commit | Line | Data |
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382266ad CM |
1 | /* |
2 | * arch/arm/mm/cache-l2x0.c - L210/L220 cache controller support | |
3 | * | |
4 | * Copyright (C) 2007 ARM Limited | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
8c369264 | 19 | #include <linux/err.h> |
382266ad | 20 | #include <linux/init.h> |
07620976 | 21 | #include <linux/spinlock.h> |
fced80c7 | 22 | #include <linux/io.h> |
8c369264 RH |
23 | #include <linux/of.h> |
24 | #include <linux/of_address.h> | |
382266ad CM |
25 | |
26 | #include <asm/cacheflush.h> | |
382266ad | 27 | #include <asm/hardware/cache-l2x0.h> |
b8db6b88 | 28 | #include "cache-aurora-l2.h" |
382266ad CM |
29 | |
30 | #define CACHE_LINE_SIZE 32 | |
31 | ||
32 | static void __iomem *l2x0_base; | |
bd31b859 | 33 | static DEFINE_RAW_SPINLOCK(l2x0_lock); |
3e175ca4 RK |
34 | static u32 l2x0_way_mask; /* Bitmask of active ways */ |
35 | static u32 l2x0_size; | |
f154fe9b | 36 | static unsigned long sync_reg_offset = L2X0_CACHE_SYNC; |
382266ad | 37 | |
b8db6b88 GC |
38 | /* Aurora don't have the cache ID register available, so we have to |
39 | * pass it though the device tree */ | |
40 | static u32 cache_id_part_number_from_dt; | |
41 | ||
91c2ebb9 BS |
42 | struct l2x0_regs l2x0_saved_regs; |
43 | ||
44 | struct l2x0_of_data { | |
3e175ca4 | 45 | void (*setup)(const struct device_node *, u32 *, u32 *); |
91c2ebb9 | 46 | void (*save)(void); |
6248d060 | 47 | struct outer_cache_fns outer_cache; |
91c2ebb9 BS |
48 | }; |
49 | ||
6248d060 GC |
50 | static bool of_init = false; |
51 | ||
9a6655e4 | 52 | static inline void cache_wait_way(void __iomem *reg, unsigned long mask) |
382266ad | 53 | { |
9a6655e4 | 54 | /* wait for cache operation by line or way to complete */ |
6775a558 | 55 | while (readl_relaxed(reg) & mask) |
1caf3092 | 56 | cpu_relax(); |
382266ad CM |
57 | } |
58 | ||
9a6655e4 CM |
59 | #ifdef CONFIG_CACHE_PL310 |
60 | static inline void cache_wait(void __iomem *reg, unsigned long mask) | |
61 | { | |
62 | /* cache operations by line are atomic on PL310 */ | |
63 | } | |
64 | #else | |
65 | #define cache_wait cache_wait_way | |
66 | #endif | |
67 | ||
382266ad CM |
68 | static inline void cache_sync(void) |
69 | { | |
3d107434 | 70 | void __iomem *base = l2x0_base; |
885028e4 | 71 | |
f154fe9b | 72 | writel_relaxed(0, base + sync_reg_offset); |
3d107434 | 73 | cache_wait(base + L2X0_CACHE_SYNC, 1); |
382266ad CM |
74 | } |
75 | ||
424d6b14 SS |
76 | static inline void l2x0_clean_line(unsigned long addr) |
77 | { | |
78 | void __iomem *base = l2x0_base; | |
79 | cache_wait(base + L2X0_CLEAN_LINE_PA, 1); | |
6775a558 | 80 | writel_relaxed(addr, base + L2X0_CLEAN_LINE_PA); |
424d6b14 SS |
81 | } |
82 | ||
83 | static inline void l2x0_inv_line(unsigned long addr) | |
84 | { | |
85 | void __iomem *base = l2x0_base; | |
86 | cache_wait(base + L2X0_INV_LINE_PA, 1); | |
6775a558 | 87 | writel_relaxed(addr, base + L2X0_INV_LINE_PA); |
424d6b14 SS |
88 | } |
89 | ||
2839e06c | 90 | #if defined(CONFIG_PL310_ERRATA_588369) || defined(CONFIG_PL310_ERRATA_727915) |
ab4d5368 WD |
91 | static inline void debug_writel(unsigned long val) |
92 | { | |
93 | if (outer_cache.set_debug) | |
94 | outer_cache.set_debug(val); | |
95 | } | |
9e65582a | 96 | |
ab4d5368 | 97 | static void pl310_set_debug(unsigned long val) |
2839e06c SS |
98 | { |
99 | writel_relaxed(val, l2x0_base + L2X0_DEBUG_CTRL); | |
9e65582a | 100 | } |
2839e06c SS |
101 | #else |
102 | /* Optimised out for non-errata case */ | |
103 | static inline void debug_writel(unsigned long val) | |
104 | { | |
105 | } | |
106 | ||
ab4d5368 | 107 | #define pl310_set_debug NULL |
2839e06c | 108 | #endif |
9e65582a | 109 | |
2839e06c | 110 | #ifdef CONFIG_PL310_ERRATA_588369 |
9e65582a SS |
111 | static inline void l2x0_flush_line(unsigned long addr) |
112 | { | |
113 | void __iomem *base = l2x0_base; | |
114 | ||
115 | /* Clean by PA followed by Invalidate by PA */ | |
116 | cache_wait(base + L2X0_CLEAN_LINE_PA, 1); | |
6775a558 | 117 | writel_relaxed(addr, base + L2X0_CLEAN_LINE_PA); |
9e65582a | 118 | cache_wait(base + L2X0_INV_LINE_PA, 1); |
6775a558 | 119 | writel_relaxed(addr, base + L2X0_INV_LINE_PA); |
9e65582a SS |
120 | } |
121 | #else | |
122 | ||
424d6b14 SS |
123 | static inline void l2x0_flush_line(unsigned long addr) |
124 | { | |
125 | void __iomem *base = l2x0_base; | |
126 | cache_wait(base + L2X0_CLEAN_INV_LINE_PA, 1); | |
6775a558 | 127 | writel_relaxed(addr, base + L2X0_CLEAN_INV_LINE_PA); |
424d6b14 | 128 | } |
9e65582a | 129 | #endif |
424d6b14 | 130 | |
23107c54 CM |
131 | static void l2x0_cache_sync(void) |
132 | { | |
133 | unsigned long flags; | |
134 | ||
bd31b859 | 135 | raw_spin_lock_irqsave(&l2x0_lock, flags); |
23107c54 | 136 | cache_sync(); |
bd31b859 | 137 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
23107c54 CM |
138 | } |
139 | ||
38a8914f | 140 | static void __l2x0_flush_all(void) |
2fd86589 | 141 | { |
2839e06c | 142 | debug_writel(0x03); |
2fd86589 TG |
143 | writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_CLEAN_INV_WAY); |
144 | cache_wait_way(l2x0_base + L2X0_CLEAN_INV_WAY, l2x0_way_mask); | |
145 | cache_sync(); | |
2839e06c | 146 | debug_writel(0x00); |
38a8914f WD |
147 | } |
148 | ||
149 | static void l2x0_flush_all(void) | |
150 | { | |
151 | unsigned long flags; | |
152 | ||
153 | /* clean all ways */ | |
bd31b859 | 154 | raw_spin_lock_irqsave(&l2x0_lock, flags); |
38a8914f | 155 | __l2x0_flush_all(); |
bd31b859 | 156 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
2fd86589 TG |
157 | } |
158 | ||
444457c1 SS |
159 | static void l2x0_clean_all(void) |
160 | { | |
161 | unsigned long flags; | |
162 | ||
163 | /* clean all ways */ | |
bd31b859 | 164 | raw_spin_lock_irqsave(&l2x0_lock, flags); |
444457c1 SS |
165 | writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_CLEAN_WAY); |
166 | cache_wait_way(l2x0_base + L2X0_CLEAN_WAY, l2x0_way_mask); | |
167 | cache_sync(); | |
bd31b859 | 168 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
444457c1 SS |
169 | } |
170 | ||
2fd86589 | 171 | static void l2x0_inv_all(void) |
382266ad | 172 | { |
0eb948dd RK |
173 | unsigned long flags; |
174 | ||
382266ad | 175 | /* invalidate all ways */ |
bd31b859 | 176 | raw_spin_lock_irqsave(&l2x0_lock, flags); |
2fd86589 | 177 | /* Invalidating when L2 is enabled is a nono */ |
b8db6b88 | 178 | BUG_ON(readl(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN); |
6775a558 | 179 | writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_INV_WAY); |
9a6655e4 | 180 | cache_wait_way(l2x0_base + L2X0_INV_WAY, l2x0_way_mask); |
382266ad | 181 | cache_sync(); |
bd31b859 | 182 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
382266ad CM |
183 | } |
184 | ||
185 | static void l2x0_inv_range(unsigned long start, unsigned long end) | |
186 | { | |
3d107434 | 187 | void __iomem *base = l2x0_base; |
0eb948dd | 188 | unsigned long flags; |
382266ad | 189 | |
bd31b859 | 190 | raw_spin_lock_irqsave(&l2x0_lock, flags); |
4f6627ac RS |
191 | if (start & (CACHE_LINE_SIZE - 1)) { |
192 | start &= ~(CACHE_LINE_SIZE - 1); | |
9e65582a | 193 | debug_writel(0x03); |
424d6b14 | 194 | l2x0_flush_line(start); |
9e65582a | 195 | debug_writel(0x00); |
4f6627ac RS |
196 | start += CACHE_LINE_SIZE; |
197 | } | |
198 | ||
199 | if (end & (CACHE_LINE_SIZE - 1)) { | |
200 | end &= ~(CACHE_LINE_SIZE - 1); | |
9e65582a | 201 | debug_writel(0x03); |
424d6b14 | 202 | l2x0_flush_line(end); |
9e65582a | 203 | debug_writel(0x00); |
4f6627ac RS |
204 | } |
205 | ||
0eb948dd RK |
206 | while (start < end) { |
207 | unsigned long blk_end = start + min(end - start, 4096UL); | |
208 | ||
209 | while (start < blk_end) { | |
424d6b14 | 210 | l2x0_inv_line(start); |
0eb948dd RK |
211 | start += CACHE_LINE_SIZE; |
212 | } | |
213 | ||
214 | if (blk_end < end) { | |
bd31b859 TG |
215 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
216 | raw_spin_lock_irqsave(&l2x0_lock, flags); | |
0eb948dd RK |
217 | } |
218 | } | |
3d107434 | 219 | cache_wait(base + L2X0_INV_LINE_PA, 1); |
382266ad | 220 | cache_sync(); |
bd31b859 | 221 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
382266ad CM |
222 | } |
223 | ||
224 | static void l2x0_clean_range(unsigned long start, unsigned long end) | |
225 | { | |
3d107434 | 226 | void __iomem *base = l2x0_base; |
0eb948dd | 227 | unsigned long flags; |
382266ad | 228 | |
444457c1 SS |
229 | if ((end - start) >= l2x0_size) { |
230 | l2x0_clean_all(); | |
231 | return; | |
232 | } | |
233 | ||
bd31b859 | 234 | raw_spin_lock_irqsave(&l2x0_lock, flags); |
382266ad | 235 | start &= ~(CACHE_LINE_SIZE - 1); |
0eb948dd RK |
236 | while (start < end) { |
237 | unsigned long blk_end = start + min(end - start, 4096UL); | |
238 | ||
239 | while (start < blk_end) { | |
424d6b14 | 240 | l2x0_clean_line(start); |
0eb948dd RK |
241 | start += CACHE_LINE_SIZE; |
242 | } | |
243 | ||
244 | if (blk_end < end) { | |
bd31b859 TG |
245 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
246 | raw_spin_lock_irqsave(&l2x0_lock, flags); | |
0eb948dd RK |
247 | } |
248 | } | |
3d107434 | 249 | cache_wait(base + L2X0_CLEAN_LINE_PA, 1); |
382266ad | 250 | cache_sync(); |
bd31b859 | 251 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
382266ad CM |
252 | } |
253 | ||
254 | static void l2x0_flush_range(unsigned long start, unsigned long end) | |
255 | { | |
3d107434 | 256 | void __iomem *base = l2x0_base; |
0eb948dd | 257 | unsigned long flags; |
382266ad | 258 | |
444457c1 SS |
259 | if ((end - start) >= l2x0_size) { |
260 | l2x0_flush_all(); | |
261 | return; | |
262 | } | |
263 | ||
bd31b859 | 264 | raw_spin_lock_irqsave(&l2x0_lock, flags); |
382266ad | 265 | start &= ~(CACHE_LINE_SIZE - 1); |
0eb948dd RK |
266 | while (start < end) { |
267 | unsigned long blk_end = start + min(end - start, 4096UL); | |
268 | ||
9e65582a | 269 | debug_writel(0x03); |
0eb948dd | 270 | while (start < blk_end) { |
424d6b14 | 271 | l2x0_flush_line(start); |
0eb948dd RK |
272 | start += CACHE_LINE_SIZE; |
273 | } | |
9e65582a | 274 | debug_writel(0x00); |
0eb948dd RK |
275 | |
276 | if (blk_end < end) { | |
bd31b859 TG |
277 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
278 | raw_spin_lock_irqsave(&l2x0_lock, flags); | |
0eb948dd RK |
279 | } |
280 | } | |
3d107434 | 281 | cache_wait(base + L2X0_CLEAN_INV_LINE_PA, 1); |
382266ad | 282 | cache_sync(); |
bd31b859 | 283 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
382266ad CM |
284 | } |
285 | ||
2fd86589 TG |
286 | static void l2x0_disable(void) |
287 | { | |
288 | unsigned long flags; | |
289 | ||
bd31b859 | 290 | raw_spin_lock_irqsave(&l2x0_lock, flags); |
38a8914f WD |
291 | __l2x0_flush_all(); |
292 | writel_relaxed(0, l2x0_base + L2X0_CTRL); | |
293 | dsb(); | |
bd31b859 | 294 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
2fd86589 TG |
295 | } |
296 | ||
3e175ca4 | 297 | static void l2x0_unlock(u32 cache_id) |
bac7e6ec LW |
298 | { |
299 | int lockregs; | |
300 | int i; | |
301 | ||
6e7aceeb | 302 | switch (cache_id & L2X0_CACHE_ID_PART_MASK) { |
b8db6b88 | 303 | case L2X0_CACHE_ID_PART_L310: |
bac7e6ec | 304 | lockregs = 8; |
b8db6b88 GC |
305 | break; |
306 | case AURORA_CACHE_ID: | |
307 | lockregs = 4; | |
308 | break; | |
309 | default: | |
bac7e6ec LW |
310 | /* L210 and unknown types */ |
311 | lockregs = 1; | |
b8db6b88 GC |
312 | break; |
313 | } | |
bac7e6ec LW |
314 | |
315 | for (i = 0; i < lockregs; i++) { | |
316 | writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE + | |
317 | i * L2X0_LOCKDOWN_STRIDE); | |
318 | writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE + | |
319 | i * L2X0_LOCKDOWN_STRIDE); | |
320 | } | |
321 | } | |
322 | ||
3e175ca4 | 323 | void __init l2x0_init(void __iomem *base, u32 aux_val, u32 aux_mask) |
382266ad | 324 | { |
3e175ca4 RK |
325 | u32 aux; |
326 | u32 cache_id; | |
327 | u32 way_size = 0; | |
64039be8 | 328 | int ways; |
b8db6b88 | 329 | int way_size_shift = L2X0_WAY_SIZE_SHIFT; |
64039be8 | 330 | const char *type; |
382266ad CM |
331 | |
332 | l2x0_base = base; | |
b8db6b88 GC |
333 | if (cache_id_part_number_from_dt) |
334 | cache_id = cache_id_part_number_from_dt; | |
335 | else | |
6e7aceeb | 336 | cache_id = readl_relaxed(l2x0_base + L2X0_CACHE_ID); |
6775a558 | 337 | aux = readl_relaxed(l2x0_base + L2X0_AUX_CTRL); |
64039be8 | 338 | |
4082cfa7 SH |
339 | aux &= aux_mask; |
340 | aux |= aux_val; | |
341 | ||
64039be8 | 342 | /* Determine the number of ways */ |
6e7aceeb | 343 | switch (cache_id & L2X0_CACHE_ID_PART_MASK) { |
64039be8 JM |
344 | case L2X0_CACHE_ID_PART_L310: |
345 | if (aux & (1 << 16)) | |
346 | ways = 16; | |
347 | else | |
348 | ways = 8; | |
349 | type = "L310"; | |
f154fe9b WD |
350 | #ifdef CONFIG_PL310_ERRATA_753970 |
351 | /* Unmapped register. */ | |
352 | sync_reg_offset = L2X0_DUMMY_REG; | |
353 | #endif | |
74ddcdb8 RH |
354 | if ((cache_id & L2X0_CACHE_ID_RTL_MASK) <= L2X0_CACHE_ID_RTL_R3P0) |
355 | outer_cache.set_debug = pl310_set_debug; | |
64039be8 JM |
356 | break; |
357 | case L2X0_CACHE_ID_PART_L210: | |
358 | ways = (aux >> 13) & 0xf; | |
359 | type = "L210"; | |
360 | break; | |
b8db6b88 GC |
361 | |
362 | case AURORA_CACHE_ID: | |
363 | sync_reg_offset = AURORA_SYNC_REG; | |
364 | ways = (aux >> 13) & 0xf; | |
365 | ways = 2 << ((ways + 1) >> 2); | |
366 | way_size_shift = AURORA_WAY_SIZE_SHIFT; | |
367 | type = "Aurora"; | |
368 | break; | |
64039be8 JM |
369 | default: |
370 | /* Assume unknown chips have 8 ways */ | |
371 | ways = 8; | |
372 | type = "L2x0 series"; | |
373 | break; | |
374 | } | |
375 | ||
376 | l2x0_way_mask = (1 << ways) - 1; | |
377 | ||
5ba70372 SS |
378 | /* |
379 | * L2 cache Size = Way size * Number of ways | |
380 | */ | |
381 | way_size = (aux & L2X0_AUX_CTRL_WAY_SIZE_MASK) >> 17; | |
b8db6b88 GC |
382 | way_size = 1 << (way_size + way_size_shift); |
383 | ||
5ba70372 SS |
384 | l2x0_size = ways * way_size * SZ_1K; |
385 | ||
48371cd3 SK |
386 | /* |
387 | * Check if l2x0 controller is already enabled. | |
388 | * If you are booting from non-secure mode | |
389 | * accessing the below registers will fault. | |
390 | */ | |
b8db6b88 | 391 | if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) { |
bac7e6ec LW |
392 | /* Make sure that I&D is not locked down when starting */ |
393 | l2x0_unlock(cache_id); | |
382266ad | 394 | |
48371cd3 | 395 | /* l2x0 controller is disabled */ |
6775a558 | 396 | writel_relaxed(aux, l2x0_base + L2X0_AUX_CTRL); |
382266ad | 397 | |
48371cd3 SK |
398 | l2x0_inv_all(); |
399 | ||
400 | /* enable L2X0 */ | |
b8db6b88 | 401 | writel_relaxed(L2X0_CTRL_EN, l2x0_base + L2X0_CTRL); |
48371cd3 | 402 | } |
382266ad | 403 | |
9d4876f0 YM |
404 | /* Re-read it in case some bits are reserved. */ |
405 | aux = readl_relaxed(l2x0_base + L2X0_AUX_CTRL); | |
406 | ||
407 | /* Save the value for resuming. */ | |
408 | l2x0_saved_regs.aux_ctrl = aux; | |
409 | ||
6248d060 GC |
410 | if (!of_init) { |
411 | outer_cache.inv_range = l2x0_inv_range; | |
412 | outer_cache.clean_range = l2x0_clean_range; | |
413 | outer_cache.flush_range = l2x0_flush_range; | |
414 | outer_cache.sync = l2x0_cache_sync; | |
415 | outer_cache.flush_all = l2x0_flush_all; | |
416 | outer_cache.inv_all = l2x0_inv_all; | |
417 | outer_cache.disable = l2x0_disable; | |
418 | } | |
382266ad | 419 | |
64039be8 | 420 | printk(KERN_INFO "%s cache controller enabled\n", type); |
5ba70372 SS |
421 | printk(KERN_INFO "l2x0: %d ways, CACHE_ID 0x%08x, AUX_CTRL 0x%08x, Cache size: %d B\n", |
422 | ways, cache_id, aux, l2x0_size); | |
382266ad | 423 | } |
8c369264 RH |
424 | |
425 | #ifdef CONFIG_OF | |
b8db6b88 GC |
426 | static int l2_wt_override; |
427 | ||
428 | /* | |
429 | * Note that the end addresses passed to Linux primitives are | |
430 | * noninclusive, while the hardware cache range operations use | |
431 | * inclusive start and end addresses. | |
432 | */ | |
433 | static unsigned long calc_range_end(unsigned long start, unsigned long end) | |
434 | { | |
435 | /* | |
436 | * Limit the number of cache lines processed at once, | |
437 | * since cache range operations stall the CPU pipeline | |
438 | * until completion. | |
439 | */ | |
440 | if (end > start + MAX_RANGE_SIZE) | |
441 | end = start + MAX_RANGE_SIZE; | |
442 | ||
443 | /* | |
444 | * Cache range operations can't straddle a page boundary. | |
445 | */ | |
446 | if (end > PAGE_ALIGN(start+1)) | |
447 | end = PAGE_ALIGN(start+1); | |
448 | ||
449 | return end; | |
450 | } | |
451 | ||
452 | /* | |
453 | * Make sure 'start' and 'end' reference the same page, as L2 is PIPT | |
454 | * and range operations only do a TLB lookup on the start address. | |
455 | */ | |
456 | static void aurora_pa_range(unsigned long start, unsigned long end, | |
457 | unsigned long offset) | |
458 | { | |
459 | unsigned long flags; | |
460 | ||
461 | raw_spin_lock_irqsave(&l2x0_lock, flags); | |
8a3a180d GC |
462 | writel_relaxed(start, l2x0_base + AURORA_RANGE_BASE_ADDR_REG); |
463 | writel_relaxed(end, l2x0_base + offset); | |
b8db6b88 GC |
464 | raw_spin_unlock_irqrestore(&l2x0_lock, flags); |
465 | ||
466 | cache_sync(); | |
467 | } | |
468 | ||
469 | static void aurora_inv_range(unsigned long start, unsigned long end) | |
470 | { | |
471 | /* | |
472 | * round start and end adresses up to cache line size | |
473 | */ | |
474 | start &= ~(CACHE_LINE_SIZE - 1); | |
475 | end = ALIGN(end, CACHE_LINE_SIZE); | |
476 | ||
477 | /* | |
478 | * Invalidate all full cache lines between 'start' and 'end'. | |
479 | */ | |
480 | while (start < end) { | |
481 | unsigned long range_end = calc_range_end(start, end); | |
482 | aurora_pa_range(start, range_end - CACHE_LINE_SIZE, | |
483 | AURORA_INVAL_RANGE_REG); | |
484 | start = range_end; | |
485 | } | |
486 | } | |
487 | ||
488 | static void aurora_clean_range(unsigned long start, unsigned long end) | |
489 | { | |
490 | /* | |
491 | * If L2 is forced to WT, the L2 will always be clean and we | |
492 | * don't need to do anything here. | |
493 | */ | |
494 | if (!l2_wt_override) { | |
495 | start &= ~(CACHE_LINE_SIZE - 1); | |
496 | end = ALIGN(end, CACHE_LINE_SIZE); | |
497 | while (start != end) { | |
498 | unsigned long range_end = calc_range_end(start, end); | |
499 | aurora_pa_range(start, range_end - CACHE_LINE_SIZE, | |
500 | AURORA_CLEAN_RANGE_REG); | |
501 | start = range_end; | |
502 | } | |
503 | } | |
504 | } | |
505 | ||
506 | static void aurora_flush_range(unsigned long start, unsigned long end) | |
507 | { | |
8b827c60 GC |
508 | start &= ~(CACHE_LINE_SIZE - 1); |
509 | end = ALIGN(end, CACHE_LINE_SIZE); | |
510 | while (start != end) { | |
511 | unsigned long range_end = calc_range_end(start, end); | |
512 | /* | |
513 | * If L2 is forced to WT, the L2 will always be clean and we | |
514 | * just need to invalidate. | |
515 | */ | |
516 | if (l2_wt_override) | |
b8db6b88 | 517 | aurora_pa_range(start, range_end - CACHE_LINE_SIZE, |
8b827c60 GC |
518 | AURORA_INVAL_RANGE_REG); |
519 | else | |
520 | aurora_pa_range(start, range_end - CACHE_LINE_SIZE, | |
521 | AURORA_FLUSH_RANGE_REG); | |
522 | start = range_end; | |
b8db6b88 GC |
523 | } |
524 | } | |
525 | ||
8c369264 | 526 | static void __init l2x0_of_setup(const struct device_node *np, |
3e175ca4 | 527 | u32 *aux_val, u32 *aux_mask) |
8c369264 RH |
528 | { |
529 | u32 data[2] = { 0, 0 }; | |
530 | u32 tag = 0; | |
531 | u32 dirty = 0; | |
532 | u32 val = 0, mask = 0; | |
533 | ||
534 | of_property_read_u32(np, "arm,tag-latency", &tag); | |
535 | if (tag) { | |
536 | mask |= L2X0_AUX_CTRL_TAG_LATENCY_MASK; | |
537 | val |= (tag - 1) << L2X0_AUX_CTRL_TAG_LATENCY_SHIFT; | |
538 | } | |
539 | ||
540 | of_property_read_u32_array(np, "arm,data-latency", | |
541 | data, ARRAY_SIZE(data)); | |
542 | if (data[0] && data[1]) { | |
543 | mask |= L2X0_AUX_CTRL_DATA_RD_LATENCY_MASK | | |
544 | L2X0_AUX_CTRL_DATA_WR_LATENCY_MASK; | |
545 | val |= ((data[0] - 1) << L2X0_AUX_CTRL_DATA_RD_LATENCY_SHIFT) | | |
546 | ((data[1] - 1) << L2X0_AUX_CTRL_DATA_WR_LATENCY_SHIFT); | |
547 | } | |
548 | ||
549 | of_property_read_u32(np, "arm,dirty-latency", &dirty); | |
550 | if (dirty) { | |
551 | mask |= L2X0_AUX_CTRL_DIRTY_LATENCY_MASK; | |
552 | val |= (dirty - 1) << L2X0_AUX_CTRL_DIRTY_LATENCY_SHIFT; | |
553 | } | |
554 | ||
555 | *aux_val &= ~mask; | |
556 | *aux_val |= val; | |
557 | *aux_mask &= ~mask; | |
558 | } | |
559 | ||
560 | static void __init pl310_of_setup(const struct device_node *np, | |
3e175ca4 | 561 | u32 *aux_val, u32 *aux_mask) |
8c369264 RH |
562 | { |
563 | u32 data[3] = { 0, 0, 0 }; | |
564 | u32 tag[3] = { 0, 0, 0 }; | |
565 | u32 filter[2] = { 0, 0 }; | |
566 | ||
567 | of_property_read_u32_array(np, "arm,tag-latency", tag, ARRAY_SIZE(tag)); | |
568 | if (tag[0] && tag[1] && tag[2]) | |
569 | writel_relaxed( | |
570 | ((tag[0] - 1) << L2X0_LATENCY_CTRL_RD_SHIFT) | | |
571 | ((tag[1] - 1) << L2X0_LATENCY_CTRL_WR_SHIFT) | | |
572 | ((tag[2] - 1) << L2X0_LATENCY_CTRL_SETUP_SHIFT), | |
573 | l2x0_base + L2X0_TAG_LATENCY_CTRL); | |
574 | ||
575 | of_property_read_u32_array(np, "arm,data-latency", | |
576 | data, ARRAY_SIZE(data)); | |
577 | if (data[0] && data[1] && data[2]) | |
578 | writel_relaxed( | |
579 | ((data[0] - 1) << L2X0_LATENCY_CTRL_RD_SHIFT) | | |
580 | ((data[1] - 1) << L2X0_LATENCY_CTRL_WR_SHIFT) | | |
581 | ((data[2] - 1) << L2X0_LATENCY_CTRL_SETUP_SHIFT), | |
582 | l2x0_base + L2X0_DATA_LATENCY_CTRL); | |
583 | ||
584 | of_property_read_u32_array(np, "arm,filter-ranges", | |
585 | filter, ARRAY_SIZE(filter)); | |
74d41f39 | 586 | if (filter[1]) { |
8c369264 RH |
587 | writel_relaxed(ALIGN(filter[0] + filter[1], SZ_1M), |
588 | l2x0_base + L2X0_ADDR_FILTER_END); | |
589 | writel_relaxed((filter[0] & ~(SZ_1M - 1)) | L2X0_ADDR_FILTER_EN, | |
590 | l2x0_base + L2X0_ADDR_FILTER_START); | |
591 | } | |
592 | } | |
593 | ||
91c2ebb9 BS |
594 | static void __init pl310_save(void) |
595 | { | |
596 | u32 l2x0_revision = readl_relaxed(l2x0_base + L2X0_CACHE_ID) & | |
597 | L2X0_CACHE_ID_RTL_MASK; | |
598 | ||
599 | l2x0_saved_regs.tag_latency = readl_relaxed(l2x0_base + | |
600 | L2X0_TAG_LATENCY_CTRL); | |
601 | l2x0_saved_regs.data_latency = readl_relaxed(l2x0_base + | |
602 | L2X0_DATA_LATENCY_CTRL); | |
603 | l2x0_saved_regs.filter_end = readl_relaxed(l2x0_base + | |
604 | L2X0_ADDR_FILTER_END); | |
605 | l2x0_saved_regs.filter_start = readl_relaxed(l2x0_base + | |
606 | L2X0_ADDR_FILTER_START); | |
607 | ||
608 | if (l2x0_revision >= L2X0_CACHE_ID_RTL_R2P0) { | |
609 | /* | |
610 | * From r2p0, there is Prefetch offset/control register | |
611 | */ | |
612 | l2x0_saved_regs.prefetch_ctrl = readl_relaxed(l2x0_base + | |
613 | L2X0_PREFETCH_CTRL); | |
614 | /* | |
615 | * From r3p0, there is Power control register | |
616 | */ | |
617 | if (l2x0_revision >= L2X0_CACHE_ID_RTL_R3P0) | |
618 | l2x0_saved_regs.pwr_ctrl = readl_relaxed(l2x0_base + | |
619 | L2X0_POWER_CTRL); | |
620 | } | |
621 | } | |
622 | ||
b8db6b88 GC |
623 | static void aurora_save(void) |
624 | { | |
625 | l2x0_saved_regs.ctrl = readl_relaxed(l2x0_base + L2X0_CTRL); | |
626 | l2x0_saved_regs.aux_ctrl = readl_relaxed(l2x0_base + L2X0_AUX_CTRL); | |
627 | } | |
628 | ||
91c2ebb9 BS |
629 | static void l2x0_resume(void) |
630 | { | |
b8db6b88 | 631 | if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) { |
91c2ebb9 BS |
632 | /* restore aux ctrl and enable l2 */ |
633 | l2x0_unlock(readl_relaxed(l2x0_base + L2X0_CACHE_ID)); | |
634 | ||
635 | writel_relaxed(l2x0_saved_regs.aux_ctrl, l2x0_base + | |
636 | L2X0_AUX_CTRL); | |
637 | ||
638 | l2x0_inv_all(); | |
639 | ||
b8db6b88 | 640 | writel_relaxed(L2X0_CTRL_EN, l2x0_base + L2X0_CTRL); |
91c2ebb9 BS |
641 | } |
642 | } | |
643 | ||
644 | static void pl310_resume(void) | |
645 | { | |
646 | u32 l2x0_revision; | |
647 | ||
b8db6b88 | 648 | if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) { |
91c2ebb9 BS |
649 | /* restore pl310 setup */ |
650 | writel_relaxed(l2x0_saved_regs.tag_latency, | |
651 | l2x0_base + L2X0_TAG_LATENCY_CTRL); | |
652 | writel_relaxed(l2x0_saved_regs.data_latency, | |
653 | l2x0_base + L2X0_DATA_LATENCY_CTRL); | |
654 | writel_relaxed(l2x0_saved_regs.filter_end, | |
655 | l2x0_base + L2X0_ADDR_FILTER_END); | |
656 | writel_relaxed(l2x0_saved_regs.filter_start, | |
657 | l2x0_base + L2X0_ADDR_FILTER_START); | |
658 | ||
659 | l2x0_revision = readl_relaxed(l2x0_base + L2X0_CACHE_ID) & | |
660 | L2X0_CACHE_ID_RTL_MASK; | |
661 | ||
662 | if (l2x0_revision >= L2X0_CACHE_ID_RTL_R2P0) { | |
663 | writel_relaxed(l2x0_saved_regs.prefetch_ctrl, | |
664 | l2x0_base + L2X0_PREFETCH_CTRL); | |
665 | if (l2x0_revision >= L2X0_CACHE_ID_RTL_R3P0) | |
666 | writel_relaxed(l2x0_saved_regs.pwr_ctrl, | |
667 | l2x0_base + L2X0_POWER_CTRL); | |
668 | } | |
669 | } | |
670 | ||
671 | l2x0_resume(); | |
672 | } | |
673 | ||
b8db6b88 GC |
674 | static void aurora_resume(void) |
675 | { | |
676 | if (!(readl(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) { | |
8a3a180d GC |
677 | writel_relaxed(l2x0_saved_regs.aux_ctrl, |
678 | l2x0_base + L2X0_AUX_CTRL); | |
679 | writel_relaxed(l2x0_saved_regs.ctrl, l2x0_base + L2X0_CTRL); | |
b8db6b88 GC |
680 | } |
681 | } | |
682 | ||
683 | static void __init aurora_broadcast_l2_commands(void) | |
684 | { | |
685 | __u32 u; | |
686 | /* Enable Broadcasting of cache commands to L2*/ | |
687 | __asm__ __volatile__("mrc p15, 1, %0, c15, c2, 0" : "=r"(u)); | |
688 | u |= AURORA_CTRL_FW; /* Set the FW bit */ | |
689 | __asm__ __volatile__("mcr p15, 1, %0, c15, c2, 0\n" : : "r"(u)); | |
690 | isb(); | |
691 | } | |
692 | ||
693 | static void __init aurora_of_setup(const struct device_node *np, | |
694 | u32 *aux_val, u32 *aux_mask) | |
695 | { | |
696 | u32 val = AURORA_ACR_REPLACEMENT_TYPE_SEMIPLRU; | |
697 | u32 mask = AURORA_ACR_REPLACEMENT_MASK; | |
698 | ||
699 | of_property_read_u32(np, "cache-id-part", | |
700 | &cache_id_part_number_from_dt); | |
701 | ||
702 | /* Determine and save the write policy */ | |
703 | l2_wt_override = of_property_read_bool(np, "wt-override"); | |
704 | ||
705 | if (l2_wt_override) { | |
706 | val |= AURORA_ACR_FORCE_WRITE_THRO_POLICY; | |
707 | mask |= AURORA_ACR_FORCE_WRITE_POLICY_MASK; | |
708 | } | |
709 | ||
710 | *aux_val &= ~mask; | |
711 | *aux_val |= val; | |
712 | *aux_mask &= ~mask; | |
713 | } | |
714 | ||
91c2ebb9 | 715 | static const struct l2x0_of_data pl310_data = { |
6248d060 GC |
716 | .setup = pl310_of_setup, |
717 | .save = pl310_save, | |
718 | .outer_cache = { | |
719 | .resume = pl310_resume, | |
720 | .inv_range = l2x0_inv_range, | |
721 | .clean_range = l2x0_clean_range, | |
722 | .flush_range = l2x0_flush_range, | |
723 | .sync = l2x0_cache_sync, | |
724 | .flush_all = l2x0_flush_all, | |
725 | .inv_all = l2x0_inv_all, | |
726 | .disable = l2x0_disable, | |
6248d060 | 727 | }, |
91c2ebb9 BS |
728 | }; |
729 | ||
730 | static const struct l2x0_of_data l2x0_data = { | |
6248d060 GC |
731 | .setup = l2x0_of_setup, |
732 | .save = NULL, | |
733 | .outer_cache = { | |
734 | .resume = l2x0_resume, | |
735 | .inv_range = l2x0_inv_range, | |
736 | .clean_range = l2x0_clean_range, | |
737 | .flush_range = l2x0_flush_range, | |
738 | .sync = l2x0_cache_sync, | |
739 | .flush_all = l2x0_flush_all, | |
740 | .inv_all = l2x0_inv_all, | |
741 | .disable = l2x0_disable, | |
742 | }, | |
91c2ebb9 BS |
743 | }; |
744 | ||
b8db6b88 GC |
745 | static const struct l2x0_of_data aurora_with_outer_data = { |
746 | .setup = aurora_of_setup, | |
747 | .save = aurora_save, | |
748 | .outer_cache = { | |
749 | .resume = aurora_resume, | |
750 | .inv_range = aurora_inv_range, | |
751 | .clean_range = aurora_clean_range, | |
752 | .flush_range = aurora_flush_range, | |
753 | .sync = l2x0_cache_sync, | |
754 | .flush_all = l2x0_flush_all, | |
755 | .inv_all = l2x0_inv_all, | |
756 | .disable = l2x0_disable, | |
757 | }, | |
758 | }; | |
759 | ||
760 | static const struct l2x0_of_data aurora_no_outer_data = { | |
761 | .setup = aurora_of_setup, | |
762 | .save = aurora_save, | |
763 | .outer_cache = { | |
764 | .resume = aurora_resume, | |
765 | }, | |
766 | }; | |
767 | ||
8c369264 | 768 | static const struct of_device_id l2x0_ids[] __initconst = { |
91c2ebb9 BS |
769 | { .compatible = "arm,pl310-cache", .data = (void *)&pl310_data }, |
770 | { .compatible = "arm,l220-cache", .data = (void *)&l2x0_data }, | |
771 | { .compatible = "arm,l210-cache", .data = (void *)&l2x0_data }, | |
b8db6b88 GC |
772 | { .compatible = "marvell,aurora-system-cache", |
773 | .data = (void *)&aurora_no_outer_data}, | |
774 | { .compatible = "marvell,aurora-outer-cache", | |
775 | .data = (void *)&aurora_with_outer_data}, | |
8c369264 RH |
776 | {} |
777 | }; | |
778 | ||
3e175ca4 | 779 | int __init l2x0_of_init(u32 aux_val, u32 aux_mask) |
8c369264 RH |
780 | { |
781 | struct device_node *np; | |
e5b5d020 | 782 | const struct l2x0_of_data *data; |
91c2ebb9 | 783 | struct resource res; |
8c369264 RH |
784 | |
785 | np = of_find_matching_node(NULL, l2x0_ids); | |
786 | if (!np) | |
787 | return -ENODEV; | |
91c2ebb9 BS |
788 | |
789 | if (of_address_to_resource(np, 0, &res)) | |
790 | return -ENODEV; | |
791 | ||
792 | l2x0_base = ioremap(res.start, resource_size(&res)); | |
8c369264 RH |
793 | if (!l2x0_base) |
794 | return -ENOMEM; | |
795 | ||
91c2ebb9 BS |
796 | l2x0_saved_regs.phy_base = res.start; |
797 | ||
798 | data = of_match_node(l2x0_ids, np)->data; | |
799 | ||
8c369264 | 800 | /* L2 configuration can only be changed if the cache is disabled */ |
b8db6b88 | 801 | if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) { |
91c2ebb9 BS |
802 | if (data->setup) |
803 | data->setup(np, &aux_val, &aux_mask); | |
b8db6b88 GC |
804 | |
805 | /* For aurora cache in no outer mode select the | |
806 | * correct mode using the coprocessor*/ | |
807 | if (data == &aurora_no_outer_data) | |
808 | aurora_broadcast_l2_commands(); | |
8c369264 | 809 | } |
91c2ebb9 BS |
810 | |
811 | if (data->save) | |
812 | data->save(); | |
813 | ||
6248d060 | 814 | of_init = true; |
6248d060 | 815 | memcpy(&outer_cache, &data->outer_cache, sizeof(outer_cache)); |
6e7aceeb | 816 | l2x0_init(l2x0_base, aux_val, aux_mask); |
6248d060 | 817 | |
8c369264 RH |
818 | return 0; |
819 | } | |
820 | #endif |