1 /* spitfire.h: SpitFire/BlackBird/Cheetah inline MMU operations.
3 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
6 #ifndef _SPARC64_SPITFIRE_H
7 #define _SPARC64_SPITFIRE_H
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.
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 */
26 /* These registers only exist as one entity, and are accessed
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
35 #define SPITFIRE_HIGHEST_LOCKED_TLBENT (64 - 1)
36 #define CHEETAH_HIGHEST_LOCKED_TLBENT (16 - 1)
38 #define L1DCACHE_SIZE 0x4000
40 #define SUN4V_CHIP_INVALID 0x00
41 #define SUN4V_CHIP_NIAGARA1 0x01
42 #define SUN4V_CHIP_NIAGARA2 0x02
43 #define SUN4V_CHIP_UNKNOWN 0xff
47 enum ultra_tlb_layout {
54 extern enum ultra_tlb_layout tlb_type;
56 extern int sun4v_chip_type;
58 extern int cheetah_pcache_forced_on;
59 extern void cheetah_enable_pcache(void);
61 #define sparc64_highest_locked_tlbent() \
62 (tlb_type == spitfire ? \
63 SPITFIRE_HIGHEST_LOCKED_TLBENT : \
64 CHEETAH_HIGHEST_LOCKED_TLBENT)
66 extern int num_kernel_image_mappings;
68 /* The data cache is write through, so this just invalidates the
71 static inline void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
73 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
76 : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
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.
85 static inline void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
87 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
90 : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
93 static inline unsigned long spitfire_get_dtlb_data(int entry)
97 __asm__ __volatile__("ldxa [%1] %2, %0"
99 : "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
101 /* Clear TTE diag bits. */
102 data &= ~0x0003fe0000000000UL;
107 static inline unsigned long spitfire_get_dtlb_tag(int entry)
111 __asm__ __volatile__("ldxa [%1] %2, %0"
113 : "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
117 static inline void spitfire_put_dtlb_data(int entry, unsigned long data)
119 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
122 : "r" (data), "r" (entry << 3),
123 "i" (ASI_DTLB_DATA_ACCESS));
126 static inline unsigned long spitfire_get_itlb_data(int entry)
130 __asm__ __volatile__("ldxa [%1] %2, %0"
132 : "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
134 /* Clear TTE diag bits. */
135 data &= ~0x0003fe0000000000UL;
140 static inline unsigned long spitfire_get_itlb_tag(int entry)
144 __asm__ __volatile__("ldxa [%1] %2, %0"
146 : "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
150 static inline void spitfire_put_itlb_data(int entry, unsigned long data)
152 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
155 : "r" (data), "r" (entry << 3),
156 "i" (ASI_ITLB_DATA_ACCESS));
159 static inline void spitfire_flush_dtlb_nucleus_page(unsigned long page)
161 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
164 : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
167 static inline void spitfire_flush_itlb_nucleus_page(unsigned long page)
169 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
172 : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
175 /* Cheetah has "all non-locked" tlb flushes. */
176 static inline void cheetah_flush_dtlb_all(void)
178 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
181 : "r" (0x80), "i" (ASI_DMMU_DEMAP));
184 static inline void cheetah_flush_itlb_all(void)
186 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
189 : "r" (0x80), "i" (ASI_IMMU_DEMAP));
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.
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.
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
206 static inline unsigned long cheetah_get_ldtlb_data(int entry)
210 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
213 : "r" ((0 << 16) | (entry << 3)),
214 "i" (ASI_DTLB_DATA_ACCESS));
219 static inline unsigned long cheetah_get_litlb_data(int entry)
223 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
226 : "r" ((0 << 16) | (entry << 3)),
227 "i" (ASI_ITLB_DATA_ACCESS));
232 static inline unsigned long cheetah_get_ldtlb_tag(int entry)
236 __asm__ __volatile__("ldxa [%1] %2, %0"
238 : "r" ((0 << 16) | (entry << 3)),
239 "i" (ASI_DTLB_TAG_READ));
244 static inline unsigned long cheetah_get_litlb_tag(int entry)
248 __asm__ __volatile__("ldxa [%1] %2, %0"
250 : "r" ((0 << 16) | (entry << 3)),
251 "i" (ASI_ITLB_TAG_READ));
256 static inline void cheetah_put_ldtlb_data(int entry, unsigned long data)
258 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
262 "r" ((0 << 16) | (entry << 3)),
263 "i" (ASI_DTLB_DATA_ACCESS));
266 static inline void cheetah_put_litlb_data(int entry, unsigned long data)
268 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
272 "r" ((0 << 16) | (entry << 3)),
273 "i" (ASI_ITLB_DATA_ACCESS));
276 static inline unsigned long cheetah_get_dtlb_data(int entry, int tlb)
280 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
283 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
288 static inline unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
292 __asm__ __volatile__("ldxa [%1] %2, %0"
294 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
298 static inline void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
300 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
304 "r" ((tlb << 16) | (entry << 3)),
305 "i" (ASI_DTLB_DATA_ACCESS));
308 static inline unsigned long cheetah_get_itlb_data(int entry)
312 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
315 : "r" ((2 << 16) | (entry << 3)),
316 "i" (ASI_ITLB_DATA_ACCESS));
321 static inline unsigned long cheetah_get_itlb_tag(int entry)
325 __asm__ __volatile__("ldxa [%1] %2, %0"
327 : "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
331 static inline void cheetah_put_itlb_data(int entry, unsigned long data)
333 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
336 : "r" (data), "r" ((2 << 16) | (entry << 3)),
337 "i" (ASI_ITLB_DATA_ACCESS));
340 #endif /* !(__ASSEMBLY__) */
342 #endif /* !(_SPARC64_SPITFIRE_H) */