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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
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9#ifdef CONFIG_SPARC64
10
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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
15e3608d 45#define SUN4V_CHIP_NIAGARA3 0x03
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46#define SUN4V_CHIP_NIAGARA4 0x04
47#define SUN4V_CHIP_NIAGARA5 0x05
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48#define SUN4V_CHIP_SPARC_M6 0x06
49#define SUN4V_CHIP_SPARC_M7 0x07
7d484acb 50#define SUN4V_CHIP_SPARC_M8 0x08
76950e6e 51#define SUN4V_CHIP_SPARC64X 0x8a
c5b8b5be 52#define SUN4V_CHIP_SPARC_SN 0x8b
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53#define SUN4V_CHIP_UNKNOWN 0xff
54
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55/*
56 * The following CPU_ID_xxx constants are used
57 * to identify the CPU type in the setup phase
58 * (see head_64.S)
59 */
60#define CPU_ID_NIAGARA1 ('1')
61#define CPU_ID_NIAGARA2 ('2')
62#define CPU_ID_NIAGARA3 ('3')
63#define CPU_ID_NIAGARA4 ('4')
64#define CPU_ID_NIAGARA5 ('5')
65#define CPU_ID_M6 ('6')
66#define CPU_ID_M7 ('7')
7d484acb 67#define CPU_ID_M8 ('8')
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68#define CPU_ID_SONOMA1 ('N')
69
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70#ifndef __ASSEMBLY__
71
72enum ultra_tlb_layout {
73 spitfire = 0,
74 cheetah = 1,
75 cheetah_plus = 2,
76 hypervisor = 3,
77};
78
79extern enum ultra_tlb_layout tlb_type;
80
81extern int sun4v_chip_type;
82
83extern int cheetah_pcache_forced_on;
f05a6865 84void cheetah_enable_pcache(void);
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85
86#define sparc64_highest_locked_tlbent() \
87 (tlb_type == spitfire ? \
88 SPITFIRE_HIGHEST_LOCKED_TLBENT : \
89 CHEETAH_HIGHEST_LOCKED_TLBENT)
90
91extern int num_kernel_image_mappings;
92
93/* The data cache is write through, so this just invalidates the
94 * specified line.
95 */
96static inline void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
97{
98 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
99 "membar #Sync"
100 : /* No outputs */
101 : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
102}
103
104/* The instruction cache lines are flushed with this, but note that
105 * this does not flush the pipeline. It is possible for a line to
106 * get flushed but stale instructions to still be in the pipeline,
107 * a flush instruction (to any address) is sufficient to handle
108 * this issue after the line is invalidated.
109 */
110static inline void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
111{
112 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
113 "membar #Sync"
114 : /* No outputs */
115 : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
116}
117
118static inline unsigned long spitfire_get_dtlb_data(int entry)
119{
120 unsigned long data;
121
122 __asm__ __volatile__("ldxa [%1] %2, %0"
123 : "=r" (data)
124 : "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
125
126 /* Clear TTE diag bits. */
127 data &= ~0x0003fe0000000000UL;
128
129 return data;
130}
131
132static inline unsigned long spitfire_get_dtlb_tag(int entry)
133{
134 unsigned long tag;
135
136 __asm__ __volatile__("ldxa [%1] %2, %0"
137 : "=r" (tag)
138 : "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
139 return tag;
140}
141
142static inline void spitfire_put_dtlb_data(int entry, unsigned long data)
143{
144 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
145 "membar #Sync"
146 : /* No outputs */
147 : "r" (data), "r" (entry << 3),
148 "i" (ASI_DTLB_DATA_ACCESS));
149}
150
151static inline unsigned long spitfire_get_itlb_data(int entry)
152{
153 unsigned long data;
154
155 __asm__ __volatile__("ldxa [%1] %2, %0"
156 : "=r" (data)
157 : "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
158
159 /* Clear TTE diag bits. */
160 data &= ~0x0003fe0000000000UL;
161
162 return data;
163}
164
165static inline unsigned long spitfire_get_itlb_tag(int entry)
166{
167 unsigned long tag;
168
169 __asm__ __volatile__("ldxa [%1] %2, %0"
170 : "=r" (tag)
171 : "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
172 return tag;
173}
174
175static inline void spitfire_put_itlb_data(int entry, unsigned long data)
176{
177 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
178 "membar #Sync"
179 : /* No outputs */
180 : "r" (data), "r" (entry << 3),
181 "i" (ASI_ITLB_DATA_ACCESS));
182}
183
184static inline void spitfire_flush_dtlb_nucleus_page(unsigned long page)
185{
186 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
187 "membar #Sync"
188 : /* No outputs */
189 : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
190}
191
192static inline void spitfire_flush_itlb_nucleus_page(unsigned long page)
193{
194 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
195 "membar #Sync"
196 : /* No outputs */
197 : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
198}
199
200/* Cheetah has "all non-locked" tlb flushes. */
201static inline void cheetah_flush_dtlb_all(void)
202{
203 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
204 "membar #Sync"
205 : /* No outputs */
206 : "r" (0x80), "i" (ASI_DMMU_DEMAP));
207}
208
209static inline void cheetah_flush_itlb_all(void)
210{
211 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
212 "membar #Sync"
213 : /* No outputs */
214 : "r" (0x80), "i" (ASI_IMMU_DEMAP));
215}
216
217/* Cheetah has a 4-tlb layout so direct access is a bit different.
218 * The first two TLBs are fully assosciative, hold 16 entries, and are
219 * used only for locked and >8K sized translations. One exists for
220 * data accesses and one for instruction accesses.
221 *
222 * The third TLB is for data accesses to 8K non-locked translations, is
223 * 2 way assosciative, and holds 512 entries. The fourth TLB is for
224 * instruction accesses to 8K non-locked translations, is 2 way
225 * assosciative, and holds 128 entries.
226 *
227 * Cheetah has some bug where bogus data can be returned from
228 * ASI_{D,I}TLB_DATA_ACCESS loads, doing the load twice fixes
229 * the problem for me. -DaveM
230 */
231static inline unsigned long cheetah_get_ldtlb_data(int entry)
232{
233 unsigned long data;
234
235 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
236 "ldxa [%1] %2, %0"
237 : "=r" (data)
238 : "r" ((0 << 16) | (entry << 3)),
239 "i" (ASI_DTLB_DATA_ACCESS));
240
241 return data;
242}
243
244static inline unsigned long cheetah_get_litlb_data(int entry)
245{
246 unsigned long data;
247
248 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
249 "ldxa [%1] %2, %0"
250 : "=r" (data)
251 : "r" ((0 << 16) | (entry << 3)),
252 "i" (ASI_ITLB_DATA_ACCESS));
253
254 return data;
255}
256
257static inline unsigned long cheetah_get_ldtlb_tag(int entry)
258{
259 unsigned long tag;
260
261 __asm__ __volatile__("ldxa [%1] %2, %0"
262 : "=r" (tag)
263 : "r" ((0 << 16) | (entry << 3)),
264 "i" (ASI_DTLB_TAG_READ));
265
266 return tag;
267}
268
269static inline unsigned long cheetah_get_litlb_tag(int entry)
270{
271 unsigned long tag;
272
273 __asm__ __volatile__("ldxa [%1] %2, %0"
274 : "=r" (tag)
275 : "r" ((0 << 16) | (entry << 3)),
276 "i" (ASI_ITLB_TAG_READ));
277
278 return tag;
279}
280
281static inline void cheetah_put_ldtlb_data(int entry, unsigned long data)
282{
283 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
284 "membar #Sync"
285 : /* No outputs */
286 : "r" (data),
287 "r" ((0 << 16) | (entry << 3)),
288 "i" (ASI_DTLB_DATA_ACCESS));
289}
290
291static inline void cheetah_put_litlb_data(int entry, unsigned long data)
292{
293 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
294 "membar #Sync"
295 : /* No outputs */
296 : "r" (data),
297 "r" ((0 << 16) | (entry << 3)),
298 "i" (ASI_ITLB_DATA_ACCESS));
299}
300
301static inline unsigned long cheetah_get_dtlb_data(int entry, int tlb)
302{
303 unsigned long data;
304
305 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
306 "ldxa [%1] %2, %0"
307 : "=r" (data)
308 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
309
310 return data;
311}
312
313static inline unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
314{
315 unsigned long tag;
316
317 __asm__ __volatile__("ldxa [%1] %2, %0"
318 : "=r" (tag)
319 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
320 return tag;
321}
322
323static inline void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
324{
325 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
326 "membar #Sync"
327 : /* No outputs */
328 : "r" (data),
329 "r" ((tlb << 16) | (entry << 3)),
330 "i" (ASI_DTLB_DATA_ACCESS));
331}
332
333static inline unsigned long cheetah_get_itlb_data(int entry)
334{
335 unsigned long data;
336
337 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
338 "ldxa [%1] %2, %0"
339 : "=r" (data)
340 : "r" ((2 << 16) | (entry << 3)),
341 "i" (ASI_ITLB_DATA_ACCESS));
342
343 return data;
344}
345
346static inline unsigned long cheetah_get_itlb_tag(int entry)
347{
348 unsigned long tag;
349
350 __asm__ __volatile__("ldxa [%1] %2, %0"
351 : "=r" (tag)
352 : "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
353 return tag;
354}
355
356static inline void cheetah_put_itlb_data(int entry, unsigned long data)
357{
358 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
359 "membar #Sync"
360 : /* No outputs */
361 : "r" (data), "r" ((2 << 16) | (entry << 3)),
362 "i" (ASI_ITLB_DATA_ACCESS));
363}
364
365#endif /* !(__ASSEMBLY__) */
d34dd829 366#endif /* CONFIG_SPARC64 */
a00736e9 367#endif /* !(_SPARC64_SPITFIRE_H) */