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Sam Ravnborga00736e2008-06-19 20:26:19 +02001/* spitfire.h: SpitFire/BlackBird/Cheetah inline MMU operations.
2 *
3 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
4 */
5
6#ifndef _SPARC64_SPITFIRE_H
7#define _SPARC64_SPITFIRE_H
8
Sam Ravnborgd34dd822008-12-07 00:04:30 -08009#ifdef CONFIG_SPARC64
10
Sam Ravnborga00736e2008-06-19 20:26:19 +020011#include <asm/asi.h>
12
13/* The following register addresses are accessible via ASI_DMMU
14 * and ASI_IMMU, that is there is a distinct and unique copy of
15 * each these registers for each TLB.
16 */
17#define TSB_TAG_TARGET 0x0000000000000000 /* All chips */
18#define TLB_SFSR 0x0000000000000018 /* All chips */
19#define TSB_REG 0x0000000000000028 /* All chips */
20#define TLB_TAG_ACCESS 0x0000000000000030 /* All chips */
21#define VIRT_WATCHPOINT 0x0000000000000038 /* All chips */
22#define PHYS_WATCHPOINT 0x0000000000000040 /* All chips */
23#define TSB_EXTENSION_P 0x0000000000000048 /* Ultra-III and later */
24#define TSB_EXTENSION_S 0x0000000000000050 /* Ultra-III and later, D-TLB only */
25#define TSB_EXTENSION_N 0x0000000000000058 /* Ultra-III and later */
26#define TLB_TAG_ACCESS_EXT 0x0000000000000060 /* Ultra-III+ and later */
27
28/* These registers only exist as one entity, and are accessed
29 * via ASI_DMMU only.
30 */
31#define PRIMARY_CONTEXT 0x0000000000000008
32#define SECONDARY_CONTEXT 0x0000000000000010
33#define DMMU_SFAR 0x0000000000000020
34#define VIRT_WATCHPOINT 0x0000000000000038
35#define PHYS_WATCHPOINT 0x0000000000000040
36
37#define SPITFIRE_HIGHEST_LOCKED_TLBENT (64 - 1)
38#define CHEETAH_HIGHEST_LOCKED_TLBENT (16 - 1)
39
40#define L1DCACHE_SIZE 0x4000
41
42#define SUN4V_CHIP_INVALID 0x00
43#define SUN4V_CHIP_NIAGARA1 0x01
44#define SUN4V_CHIP_NIAGARA2 0x02
David S. Miller15e36082011-07-27 20:42:51 -070045#define SUN4V_CHIP_NIAGARA3 0x03
David S. Miller08cefa92011-09-11 10:42:20 -070046#define SUN4V_CHIP_NIAGARA4 0x04
47#define SUN4V_CHIP_NIAGARA5 0x05
Allen Pais76950e62013-03-05 23:47:59 +000048#define SUN4V_CHIP_SPARC64X 0x8a
Sam Ravnborga00736e2008-06-19 20:26:19 +020049#define SUN4V_CHIP_UNKNOWN 0xff
50
51#ifndef __ASSEMBLY__
52
53enum ultra_tlb_layout {
54 spitfire = 0,
55 cheetah = 1,
56 cheetah_plus = 2,
57 hypervisor = 3,
58};
59
60extern enum ultra_tlb_layout tlb_type;
61
62extern int sun4v_chip_type;
63
64extern int cheetah_pcache_forced_on;
65extern void cheetah_enable_pcache(void);
66
67#define sparc64_highest_locked_tlbent() \
68 (tlb_type == spitfire ? \
69 SPITFIRE_HIGHEST_LOCKED_TLBENT : \
70 CHEETAH_HIGHEST_LOCKED_TLBENT)
71
72extern int num_kernel_image_mappings;
73
74/* The data cache is write through, so this just invalidates the
75 * specified line.
76 */
77static inline void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
78{
79 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
80 "membar #Sync"
81 : /* No outputs */
82 : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
83}
84
85/* The instruction cache lines are flushed with this, but note that
86 * this does not flush the pipeline. It is possible for a line to
87 * get flushed but stale instructions to still be in the pipeline,
88 * a flush instruction (to any address) is sufficient to handle
89 * this issue after the line is invalidated.
90 */
91static inline void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
92{
93 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
94 "membar #Sync"
95 : /* No outputs */
96 : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
97}
98
99static inline unsigned long spitfire_get_dtlb_data(int entry)
100{
101 unsigned long data;
102
103 __asm__ __volatile__("ldxa [%1] %2, %0"
104 : "=r" (data)
105 : "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
106
107 /* Clear TTE diag bits. */
108 data &= ~0x0003fe0000000000UL;
109
110 return data;
111}
112
113static inline unsigned long spitfire_get_dtlb_tag(int entry)
114{
115 unsigned long tag;
116
117 __asm__ __volatile__("ldxa [%1] %2, %0"
118 : "=r" (tag)
119 : "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
120 return tag;
121}
122
123static inline void spitfire_put_dtlb_data(int entry, unsigned long data)
124{
125 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
126 "membar #Sync"
127 : /* No outputs */
128 : "r" (data), "r" (entry << 3),
129 "i" (ASI_DTLB_DATA_ACCESS));
130}
131
132static inline unsigned long spitfire_get_itlb_data(int entry)
133{
134 unsigned long data;
135
136 __asm__ __volatile__("ldxa [%1] %2, %0"
137 : "=r" (data)
138 : "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
139
140 /* Clear TTE diag bits. */
141 data &= ~0x0003fe0000000000UL;
142
143 return data;
144}
145
146static inline unsigned long spitfire_get_itlb_tag(int entry)
147{
148 unsigned long tag;
149
150 __asm__ __volatile__("ldxa [%1] %2, %0"
151 : "=r" (tag)
152 : "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
153 return tag;
154}
155
156static inline void spitfire_put_itlb_data(int entry, unsigned long data)
157{
158 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
159 "membar #Sync"
160 : /* No outputs */
161 : "r" (data), "r" (entry << 3),
162 "i" (ASI_ITLB_DATA_ACCESS));
163}
164
165static inline void spitfire_flush_dtlb_nucleus_page(unsigned long page)
166{
167 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
168 "membar #Sync"
169 : /* No outputs */
170 : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
171}
172
173static inline void spitfire_flush_itlb_nucleus_page(unsigned long page)
174{
175 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
176 "membar #Sync"
177 : /* No outputs */
178 : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
179}
180
181/* Cheetah has "all non-locked" tlb flushes. */
182static inline void cheetah_flush_dtlb_all(void)
183{
184 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
185 "membar #Sync"
186 : /* No outputs */
187 : "r" (0x80), "i" (ASI_DMMU_DEMAP));
188}
189
190static inline void cheetah_flush_itlb_all(void)
191{
192 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
193 "membar #Sync"
194 : /* No outputs */
195 : "r" (0x80), "i" (ASI_IMMU_DEMAP));
196}
197
198/* Cheetah has a 4-tlb layout so direct access is a bit different.
199 * The first two TLBs are fully assosciative, hold 16 entries, and are
200 * used only for locked and >8K sized translations. One exists for
201 * data accesses and one for instruction accesses.
202 *
203 * The third TLB is for data accesses to 8K non-locked translations, is
204 * 2 way assosciative, and holds 512 entries. The fourth TLB is for
205 * instruction accesses to 8K non-locked translations, is 2 way
206 * assosciative, and holds 128 entries.
207 *
208 * Cheetah has some bug where bogus data can be returned from
209 * ASI_{D,I}TLB_DATA_ACCESS loads, doing the load twice fixes
210 * the problem for me. -DaveM
211 */
212static inline unsigned long cheetah_get_ldtlb_data(int entry)
213{
214 unsigned long data;
215
216 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
217 "ldxa [%1] %2, %0"
218 : "=r" (data)
219 : "r" ((0 << 16) | (entry << 3)),
220 "i" (ASI_DTLB_DATA_ACCESS));
221
222 return data;
223}
224
225static inline unsigned long cheetah_get_litlb_data(int entry)
226{
227 unsigned long data;
228
229 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
230 "ldxa [%1] %2, %0"
231 : "=r" (data)
232 : "r" ((0 << 16) | (entry << 3)),
233 "i" (ASI_ITLB_DATA_ACCESS));
234
235 return data;
236}
237
238static inline unsigned long cheetah_get_ldtlb_tag(int entry)
239{
240 unsigned long tag;
241
242 __asm__ __volatile__("ldxa [%1] %2, %0"
243 : "=r" (tag)
244 : "r" ((0 << 16) | (entry << 3)),
245 "i" (ASI_DTLB_TAG_READ));
246
247 return tag;
248}
249
250static inline unsigned long cheetah_get_litlb_tag(int entry)
251{
252 unsigned long tag;
253
254 __asm__ __volatile__("ldxa [%1] %2, %0"
255 : "=r" (tag)
256 : "r" ((0 << 16) | (entry << 3)),
257 "i" (ASI_ITLB_TAG_READ));
258
259 return tag;
260}
261
262static inline void cheetah_put_ldtlb_data(int entry, unsigned long data)
263{
264 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
265 "membar #Sync"
266 : /* No outputs */
267 : "r" (data),
268 "r" ((0 << 16) | (entry << 3)),
269 "i" (ASI_DTLB_DATA_ACCESS));
270}
271
272static inline void cheetah_put_litlb_data(int entry, unsigned long data)
273{
274 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
275 "membar #Sync"
276 : /* No outputs */
277 : "r" (data),
278 "r" ((0 << 16) | (entry << 3)),
279 "i" (ASI_ITLB_DATA_ACCESS));
280}
281
282static inline unsigned long cheetah_get_dtlb_data(int entry, int tlb)
283{
284 unsigned long data;
285
286 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
287 "ldxa [%1] %2, %0"
288 : "=r" (data)
289 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
290
291 return data;
292}
293
294static inline unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
295{
296 unsigned long tag;
297
298 __asm__ __volatile__("ldxa [%1] %2, %0"
299 : "=r" (tag)
300 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
301 return tag;
302}
303
304static inline void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
305{
306 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
307 "membar #Sync"
308 : /* No outputs */
309 : "r" (data),
310 "r" ((tlb << 16) | (entry << 3)),
311 "i" (ASI_DTLB_DATA_ACCESS));
312}
313
314static inline unsigned long cheetah_get_itlb_data(int entry)
315{
316 unsigned long data;
317
318 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
319 "ldxa [%1] %2, %0"
320 : "=r" (data)
321 : "r" ((2 << 16) | (entry << 3)),
322 "i" (ASI_ITLB_DATA_ACCESS));
323
324 return data;
325}
326
327static inline unsigned long cheetah_get_itlb_tag(int entry)
328{
329 unsigned long tag;
330
331 __asm__ __volatile__("ldxa [%1] %2, %0"
332 : "=r" (tag)
333 : "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
334 return tag;
335}
336
337static inline void cheetah_put_itlb_data(int entry, unsigned long data)
338{
339 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
340 "membar #Sync"
341 : /* No outputs */
342 : "r" (data), "r" ((2 << 16) | (entry << 3)),
343 "i" (ASI_ITLB_DATA_ACCESS));
344}
345
346#endif /* !(__ASSEMBLY__) */
Sam Ravnborgd34dd822008-12-07 00:04:30 -0800347#endif /* CONFIG_SPARC64 */
Sam Ravnborga00736e2008-06-19 20:26:19 +0200348#endif /* !(_SPARC64_SPITFIRE_H) */