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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#ifdef CONFIG_SPARC64
10
11#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
45#define SUN4V_CHIP_NIAGARA3 0x03
46#define SUN4V_CHIP_NIAGARA4 0x04
47#define SUN4V_CHIP_NIAGARA5 0x05
48#define SUN4V_CHIP_UNKNOWN 0xff
49
50#ifndef __ASSEMBLY__
51
52enum ultra_tlb_layout {
53 spitfire = 0,
54 cheetah = 1,
55 cheetah_plus = 2,
56 hypervisor = 3,
57};
58
59extern enum ultra_tlb_layout tlb_type;
60
61extern int sun4v_chip_type;
62
63extern int cheetah_pcache_forced_on;
64extern void cheetah_enable_pcache(void);
65
66#define sparc64_highest_locked_tlbent() \
67 (tlb_type == spitfire ? \
68 SPITFIRE_HIGHEST_LOCKED_TLBENT : \
69 CHEETAH_HIGHEST_LOCKED_TLBENT)
70
71extern int num_kernel_image_mappings;
72
73/* The data cache is write through, so this just invalidates the
74 * specified line.
75 */
76static inline void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
77{
78 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
79 "membar #Sync"
80 : /* No outputs */
81 : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
82}
83
84/* The instruction cache lines are flushed with this, but note that
85 * this does not flush the pipeline. It is possible for a line to
86 * get flushed but stale instructions to still be in the pipeline,
87 * a flush instruction (to any address) is sufficient to handle
88 * this issue after the line is invalidated.
89 */
90static inline void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
91{
92 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
93 "membar #Sync"
94 : /* No outputs */
95 : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
96}
97
98static inline unsigned long spitfire_get_dtlb_data(int entry)
99{
100 unsigned long data;
101
102 __asm__ __volatile__("ldxa [%1] %2, %0"
103 : "=r" (data)
104 : "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
105
106 /* Clear TTE diag bits. */
107 data &= ~0x0003fe0000000000UL;
108
109 return data;
110}
111
112static inline unsigned long spitfire_get_dtlb_tag(int entry)
113{
114 unsigned long tag;
115
116 __asm__ __volatile__("ldxa [%1] %2, %0"
117 : "=r" (tag)
118 : "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
119 return tag;
120}
121
122static inline void spitfire_put_dtlb_data(int entry, unsigned long data)
123{
124 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
125 "membar #Sync"
126 : /* No outputs */
127 : "r" (data), "r" (entry << 3),
128 "i" (ASI_DTLB_DATA_ACCESS));
129}
130
131static inline unsigned long spitfire_get_itlb_data(int entry)
132{
133 unsigned long data;
134
135 __asm__ __volatile__("ldxa [%1] %2, %0"
136 : "=r" (data)
137 : "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
138
139 /* Clear TTE diag bits. */
140 data &= ~0x0003fe0000000000UL;
141
142 return data;
143}
144
145static inline unsigned long spitfire_get_itlb_tag(int entry)
146{
147 unsigned long tag;
148
149 __asm__ __volatile__("ldxa [%1] %2, %0"
150 : "=r" (tag)
151 : "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
152 return tag;
153}
154
155static inline void spitfire_put_itlb_data(int entry, unsigned long data)
156{
157 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
158 "membar #Sync"
159 : /* No outputs */
160 : "r" (data), "r" (entry << 3),
161 "i" (ASI_ITLB_DATA_ACCESS));
162}
163
164static inline void spitfire_flush_dtlb_nucleus_page(unsigned long page)
165{
166 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
167 "membar #Sync"
168 : /* No outputs */
169 : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
170}
171
172static inline void spitfire_flush_itlb_nucleus_page(unsigned long page)
173{
174 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
175 "membar #Sync"
176 : /* No outputs */
177 : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
178}
179
180/* Cheetah has "all non-locked" tlb flushes. */
181static inline void cheetah_flush_dtlb_all(void)
182{
183 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
184 "membar #Sync"
185 : /* No outputs */
186 : "r" (0x80), "i" (ASI_DMMU_DEMAP));
187}
188
189static inline void cheetah_flush_itlb_all(void)
190{
191 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
192 "membar #Sync"
193 : /* No outputs */
194 : "r" (0x80), "i" (ASI_IMMU_DEMAP));
195}
196
197/* Cheetah has a 4-tlb layout so direct access is a bit different.
198 * The first two TLBs are fully assosciative, hold 16 entries, and are
199 * used only for locked and >8K sized translations. One exists for
200 * data accesses and one for instruction accesses.
201 *
202 * The third TLB is for data accesses to 8K non-locked translations, is
203 * 2 way assosciative, and holds 512 entries. The fourth TLB is for
204 * instruction accesses to 8K non-locked translations, is 2 way
205 * assosciative, and holds 128 entries.
206 *
207 * Cheetah has some bug where bogus data can be returned from
208 * ASI_{D,I}TLB_DATA_ACCESS loads, doing the load twice fixes
209 * the problem for me. -DaveM
210 */
211static inline unsigned long cheetah_get_ldtlb_data(int entry)
212{
213 unsigned long data;
214
215 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
216 "ldxa [%1] %2, %0"
217 : "=r" (data)
218 : "r" ((0 << 16) | (entry << 3)),
219 "i" (ASI_DTLB_DATA_ACCESS));
220
221 return data;
222}
223
224static inline unsigned long cheetah_get_litlb_data(int entry)
225{
226 unsigned long data;
227
228 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
229 "ldxa [%1] %2, %0"
230 : "=r" (data)
231 : "r" ((0 << 16) | (entry << 3)),
232 "i" (ASI_ITLB_DATA_ACCESS));
233
234 return data;
235}
236
237static inline unsigned long cheetah_get_ldtlb_tag(int entry)
238{
239 unsigned long tag;
240
241 __asm__ __volatile__("ldxa [%1] %2, %0"
242 : "=r" (tag)
243 : "r" ((0 << 16) | (entry << 3)),
244 "i" (ASI_DTLB_TAG_READ));
245
246 return tag;
247}
248
249static inline unsigned long cheetah_get_litlb_tag(int entry)
250{
251 unsigned long tag;
252
253 __asm__ __volatile__("ldxa [%1] %2, %0"
254 : "=r" (tag)
255 : "r" ((0 << 16) | (entry << 3)),
256 "i" (ASI_ITLB_TAG_READ));
257
258 return tag;
259}
260
261static inline void cheetah_put_ldtlb_data(int entry, unsigned long data)
262{
263 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
264 "membar #Sync"
265 : /* No outputs */
266 : "r" (data),
267 "r" ((0 << 16) | (entry << 3)),
268 "i" (ASI_DTLB_DATA_ACCESS));
269}
270
271static inline void cheetah_put_litlb_data(int entry, unsigned long data)
272{
273 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
274 "membar #Sync"
275 : /* No outputs */
276 : "r" (data),
277 "r" ((0 << 16) | (entry << 3)),
278 "i" (ASI_ITLB_DATA_ACCESS));
279}
280
281static inline unsigned long cheetah_get_dtlb_data(int entry, int tlb)
282{
283 unsigned long data;
284
285 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
286 "ldxa [%1] %2, %0"
287 : "=r" (data)
288 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
289
290 return data;
291}
292
293static inline unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
294{
295 unsigned long tag;
296
297 __asm__ __volatile__("ldxa [%1] %2, %0"
298 : "=r" (tag)
299 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
300 return tag;
301}
302
303static inline void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
304{
305 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
306 "membar #Sync"
307 : /* No outputs */
308 : "r" (data),
309 "r" ((tlb << 16) | (entry << 3)),
310 "i" (ASI_DTLB_DATA_ACCESS));
311}
312
313static inline unsigned long cheetah_get_itlb_data(int entry)
314{
315 unsigned long data;
316
317 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
318 "ldxa [%1] %2, %0"
319 : "=r" (data)
320 : "r" ((2 << 16) | (entry << 3)),
321 "i" (ASI_ITLB_DATA_ACCESS));
322
323 return data;
324}
325
326static inline unsigned long cheetah_get_itlb_tag(int entry)
327{
328 unsigned long tag;
329
330 __asm__ __volatile__("ldxa [%1] %2, %0"
331 : "=r" (tag)
332 : "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
333 return tag;
334}
335
336static inline void cheetah_put_itlb_data(int entry, unsigned long data)
337{
338 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
339 "membar #Sync"
340 : /* No outputs */
341 : "r" (data), "r" ((2 << 16) | (entry << 3)),
342 "i" (ASI_ITLB_DATA_ACCESS));
343}
344
345#endif /* !(__ASSEMBLY__) */
346#endif /* CONFIG_SPARC64 */
347#endif /* !(_SPARC64_SPITFIRE_H) */