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1/* 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
9#include <asm/asi.h>
10
11/* The following register addresses are accessible via ASI_DMMU
12 * and ASI_IMMU, that is there is a distinct and unique copy of
13 * each these registers for each TLB.
14 */
15#define TSB_TAG_TARGET 0x0000000000000000 /* All chips */
16#define TLB_SFSR 0x0000000000000018 /* All chips */
17#define TSB_REG 0x0000000000000028 /* All chips */
18#define TLB_TAG_ACCESS 0x0000000000000030 /* All chips */
19#define VIRT_WATCHPOINT 0x0000000000000038 /* All chips */
20#define PHYS_WATCHPOINT 0x0000000000000040 /* All chips */
21#define TSB_EXTENSION_P 0x0000000000000048 /* Ultra-III and later */
22#define TSB_EXTENSION_S 0x0000000000000050 /* Ultra-III and later, D-TLB only */
23#define TSB_EXTENSION_N 0x0000000000000058 /* Ultra-III and later */
24#define TLB_TAG_ACCESS_EXT 0x0000000000000060 /* Ultra-III+ and later */
25
26/* These registers only exist as one entity, and are accessed
27 * via ASI_DMMU only.
28 */
29#define PRIMARY_CONTEXT 0x0000000000000008
30#define SECONDARY_CONTEXT 0x0000000000000010
31#define DMMU_SFAR 0x0000000000000020
32#define VIRT_WATCHPOINT 0x0000000000000038
33#define PHYS_WATCHPOINT 0x0000000000000040
34
35#define SPITFIRE_HIGHEST_LOCKED_TLBENT (64 - 1)
36#define CHEETAH_HIGHEST_LOCKED_TLBENT (16 - 1)
37
38#define L1DCACHE_SIZE 0x4000
39
40#define SUN4V_CHIP_INVALID 0x00
41#define SUN4V_CHIP_NIAGARA1 0x01
42#define SUN4V_CHIP_NIAGARA2 0x02
43#define SUN4V_CHIP_UNKNOWN 0xff
44
45#ifndef __ASSEMBLY__
46
47enum ultra_tlb_layout {
48 spitfire = 0,
49 cheetah = 1,
50 cheetah_plus = 2,
51 hypervisor = 3,
52};
53
54extern enum ultra_tlb_layout tlb_type;
55
56extern int sun4v_chip_type;
57
58extern int cheetah_pcache_forced_on;
59extern void cheetah_enable_pcache(void);
60
61#define sparc64_highest_locked_tlbent() \
62 (tlb_type == spitfire ? \
63 SPITFIRE_HIGHEST_LOCKED_TLBENT : \
64 CHEETAH_HIGHEST_LOCKED_TLBENT)
65
66extern int num_kernel_image_mappings;
67
68/* The data cache is write through, so this just invalidates the
69 * specified line.
70 */
71static inline void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
72{
73 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
74 "membar #Sync"
75 : /* No outputs */
76 : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
77}
78
79/* The instruction cache lines are flushed with this, but note that
80 * this does not flush the pipeline. It is possible for a line to
81 * get flushed but stale instructions to still be in the pipeline,
82 * a flush instruction (to any address) is sufficient to handle
83 * this issue after the line is invalidated.
84 */
85static inline void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
86{
87 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
88 "membar #Sync"
89 : /* No outputs */
90 : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
91}
92
93static inline unsigned long spitfire_get_dtlb_data(int entry)
94{
95 unsigned long data;
96
97 __asm__ __volatile__("ldxa [%1] %2, %0"
98 : "=r" (data)
99 : "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
100
101 /* Clear TTE diag bits. */
102 data &= ~0x0003fe0000000000UL;
103
104 return data;
105}
106
107static inline unsigned long spitfire_get_dtlb_tag(int entry)
108{
109 unsigned long tag;
110
111 __asm__ __volatile__("ldxa [%1] %2, %0"
112 : "=r" (tag)
113 : "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
114 return tag;
115}
116
117static inline void spitfire_put_dtlb_data(int entry, unsigned long data)
118{
119 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
120 "membar #Sync"
121 : /* No outputs */
122 : "r" (data), "r" (entry << 3),
123 "i" (ASI_DTLB_DATA_ACCESS));
124}
125
126static inline unsigned long spitfire_get_itlb_data(int entry)
127{
128 unsigned long data;
129
130 __asm__ __volatile__("ldxa [%1] %2, %0"
131 : "=r" (data)
132 : "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
133
134 /* Clear TTE diag bits. */
135 data &= ~0x0003fe0000000000UL;
136
137 return data;
138}
139
140static inline unsigned long spitfire_get_itlb_tag(int entry)
141{
142 unsigned long tag;
143
144 __asm__ __volatile__("ldxa [%1] %2, %0"
145 : "=r" (tag)
146 : "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
147 return tag;
148}
149
150static inline void spitfire_put_itlb_data(int entry, unsigned long data)
151{
152 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
153 "membar #Sync"
154 : /* No outputs */
155 : "r" (data), "r" (entry << 3),
156 "i" (ASI_ITLB_DATA_ACCESS));
157}
158
159static inline void spitfire_flush_dtlb_nucleus_page(unsigned long page)
160{
161 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
162 "membar #Sync"
163 : /* No outputs */
164 : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
165}
166
167static inline void spitfire_flush_itlb_nucleus_page(unsigned long page)
168{
169 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
170 "membar #Sync"
171 : /* No outputs */
172 : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
173}
174
175/* Cheetah has "all non-locked" tlb flushes. */
176static inline void cheetah_flush_dtlb_all(void)
177{
178 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
179 "membar #Sync"
180 : /* No outputs */
181 : "r" (0x80), "i" (ASI_DMMU_DEMAP));
182}
183
184static inline void cheetah_flush_itlb_all(void)
185{
186 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
187 "membar #Sync"
188 : /* No outputs */
189 : "r" (0x80), "i" (ASI_IMMU_DEMAP));
190}
191
192/* Cheetah has a 4-tlb layout so direct access is a bit different.
193 * The first two TLBs are fully assosciative, hold 16 entries, and are
194 * used only for locked and >8K sized translations. One exists for
195 * data accesses and one for instruction accesses.
196 *
197 * The third TLB is for data accesses to 8K non-locked translations, is
198 * 2 way assosciative, and holds 512 entries. The fourth TLB is for
199 * instruction accesses to 8K non-locked translations, is 2 way
200 * assosciative, and holds 128 entries.
201 *
202 * Cheetah has some bug where bogus data can be returned from
203 * ASI_{D,I}TLB_DATA_ACCESS loads, doing the load twice fixes
204 * the problem for me. -DaveM
205 */
206static inline unsigned long cheetah_get_ldtlb_data(int entry)
207{
208 unsigned long data;
209
210 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
211 "ldxa [%1] %2, %0"
212 : "=r" (data)
213 : "r" ((0 << 16) | (entry << 3)),
214 "i" (ASI_DTLB_DATA_ACCESS));
215
216 return data;
217}
218
219static inline unsigned long cheetah_get_litlb_data(int entry)
220{
221 unsigned long data;
222
223 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
224 "ldxa [%1] %2, %0"
225 : "=r" (data)
226 : "r" ((0 << 16) | (entry << 3)),
227 "i" (ASI_ITLB_DATA_ACCESS));
228
229 return data;
230}
231
232static inline unsigned long cheetah_get_ldtlb_tag(int entry)
233{
234 unsigned long tag;
235
236 __asm__ __volatile__("ldxa [%1] %2, %0"
237 : "=r" (tag)
238 : "r" ((0 << 16) | (entry << 3)),
239 "i" (ASI_DTLB_TAG_READ));
240
241 return tag;
242}
243
244static inline unsigned long cheetah_get_litlb_tag(int entry)
245{
246 unsigned long tag;
247
248 __asm__ __volatile__("ldxa [%1] %2, %0"
249 : "=r" (tag)
250 : "r" ((0 << 16) | (entry << 3)),
251 "i" (ASI_ITLB_TAG_READ));
252
253 return tag;
254}
255
256static inline void cheetah_put_ldtlb_data(int entry, unsigned long data)
257{
258 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
259 "membar #Sync"
260 : /* No outputs */
261 : "r" (data),
262 "r" ((0 << 16) | (entry << 3)),
263 "i" (ASI_DTLB_DATA_ACCESS));
264}
265
266static inline void cheetah_put_litlb_data(int entry, unsigned long data)
267{
268 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
269 "membar #Sync"
270 : /* No outputs */
271 : "r" (data),
272 "r" ((0 << 16) | (entry << 3)),
273 "i" (ASI_ITLB_DATA_ACCESS));
274}
275
276static inline unsigned long cheetah_get_dtlb_data(int entry, int tlb)
277{
278 unsigned long data;
279
280 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
281 "ldxa [%1] %2, %0"
282 : "=r" (data)
283 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
284
285 return data;
286}
287
288static inline unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
289{
290 unsigned long tag;
291
292 __asm__ __volatile__("ldxa [%1] %2, %0"
293 : "=r" (tag)
294 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
295 return tag;
296}
297
298static inline void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
299{
300 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
301 "membar #Sync"
302 : /* No outputs */
303 : "r" (data),
304 "r" ((tlb << 16) | (entry << 3)),
305 "i" (ASI_DTLB_DATA_ACCESS));
306}
307
308static inline unsigned long cheetah_get_itlb_data(int entry)
309{
310 unsigned long data;
311
312 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
313 "ldxa [%1] %2, %0"
314 : "=r" (data)
315 : "r" ((2 << 16) | (entry << 3)),
316 "i" (ASI_ITLB_DATA_ACCESS));
317
318 return data;
319}
320
321static inline unsigned long cheetah_get_itlb_tag(int entry)
322{
323 unsigned long tag;
324
325 __asm__ __volatile__("ldxa [%1] %2, %0"
326 : "=r" (tag)
327 : "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
328 return tag;
329}
330
331static inline void cheetah_put_itlb_data(int entry, unsigned long data)
332{
333 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
334 "membar #Sync"
335 : /* No outputs */
336 : "r" (data), "r" ((2 << 16) | (entry << 3)),
337 "i" (ASI_ITLB_DATA_ACCESS));
338}
339
340#endif /* !(__ASSEMBLY__) */
341
342#endif /* !(_SPARC64_SPITFIRE_H) */