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 /* The data cache is write through, so this just invalidates the
69 static inline void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
71 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
74 : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
77 /* The instruction cache lines are flushed with this, but note that
78 * this does not flush the pipeline. It is possible for a line to
79 * get flushed but stale instructions to still be in the pipeline,
80 * a flush instruction (to any address) is sufficient to handle
81 * this issue after the line is invalidated.
83 static inline void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
85 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
88 : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
91 static inline unsigned long spitfire_get_dtlb_data(int entry)
95 __asm__ __volatile__("ldxa [%1] %2, %0"
97 : "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
99 /* Clear TTE diag bits. */
100 data &= ~0x0003fe0000000000UL;
105 static inline unsigned long spitfire_get_dtlb_tag(int entry)
109 __asm__ __volatile__("ldxa [%1] %2, %0"
111 : "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
115 static inline void spitfire_put_dtlb_data(int entry, unsigned long data)
117 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
120 : "r" (data), "r" (entry << 3),
121 "i" (ASI_DTLB_DATA_ACCESS));
124 static inline unsigned long spitfire_get_itlb_data(int entry)
128 __asm__ __volatile__("ldxa [%1] %2, %0"
130 : "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
132 /* Clear TTE diag bits. */
133 data &= ~0x0003fe0000000000UL;
138 static inline unsigned long spitfire_get_itlb_tag(int entry)
142 __asm__ __volatile__("ldxa [%1] %2, %0"
144 : "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
148 static inline void spitfire_put_itlb_data(int entry, unsigned long data)
150 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
153 : "r" (data), "r" (entry << 3),
154 "i" (ASI_ITLB_DATA_ACCESS));
157 static inline void spitfire_flush_dtlb_nucleus_page(unsigned long page)
159 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
162 : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
165 static inline void spitfire_flush_itlb_nucleus_page(unsigned long page)
167 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
170 : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
173 /* Cheetah has "all non-locked" tlb flushes. */
174 static inline void cheetah_flush_dtlb_all(void)
176 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
179 : "r" (0x80), "i" (ASI_DMMU_DEMAP));
182 static inline void cheetah_flush_itlb_all(void)
184 __asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
187 : "r" (0x80), "i" (ASI_IMMU_DEMAP));
190 /* Cheetah has a 4-tlb layout so direct access is a bit different.
191 * The first two TLBs are fully assosciative, hold 16 entries, and are
192 * used only for locked and >8K sized translations. One exists for
193 * data accesses and one for instruction accesses.
195 * The third TLB is for data accesses to 8K non-locked translations, is
196 * 2 way assosciative, and holds 512 entries. The fourth TLB is for
197 * instruction accesses to 8K non-locked translations, is 2 way
198 * assosciative, and holds 128 entries.
200 * Cheetah has some bug where bogus data can be returned from
201 * ASI_{D,I}TLB_DATA_ACCESS loads, doing the load twice fixes
202 * the problem for me. -DaveM
204 static inline unsigned long cheetah_get_ldtlb_data(int entry)
208 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
211 : "r" ((0 << 16) | (entry << 3)),
212 "i" (ASI_DTLB_DATA_ACCESS));
217 static inline unsigned long cheetah_get_litlb_data(int entry)
221 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
224 : "r" ((0 << 16) | (entry << 3)),
225 "i" (ASI_ITLB_DATA_ACCESS));
230 static inline unsigned long cheetah_get_ldtlb_tag(int entry)
234 __asm__ __volatile__("ldxa [%1] %2, %0"
236 : "r" ((0 << 16) | (entry << 3)),
237 "i" (ASI_DTLB_TAG_READ));
242 static inline unsigned long cheetah_get_litlb_tag(int entry)
246 __asm__ __volatile__("ldxa [%1] %2, %0"
248 : "r" ((0 << 16) | (entry << 3)),
249 "i" (ASI_ITLB_TAG_READ));
254 static inline void cheetah_put_ldtlb_data(int entry, unsigned long data)
256 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
260 "r" ((0 << 16) | (entry << 3)),
261 "i" (ASI_DTLB_DATA_ACCESS));
264 static inline void cheetah_put_litlb_data(int entry, unsigned long data)
266 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
270 "r" ((0 << 16) | (entry << 3)),
271 "i" (ASI_ITLB_DATA_ACCESS));
274 static inline unsigned long cheetah_get_dtlb_data(int entry, int tlb)
278 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
281 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
286 static inline unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
290 __asm__ __volatile__("ldxa [%1] %2, %0"
292 : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
296 static inline void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
298 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
302 "r" ((tlb << 16) | (entry << 3)),
303 "i" (ASI_DTLB_DATA_ACCESS));
306 static inline unsigned long cheetah_get_itlb_data(int entry)
310 __asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
313 : "r" ((2 << 16) | (entry << 3)),
314 "i" (ASI_ITLB_DATA_ACCESS));
319 static inline unsigned long cheetah_get_itlb_tag(int entry)
323 __asm__ __volatile__("ldxa [%1] %2, %0"
325 : "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
329 static inline void cheetah_put_itlb_data(int entry, unsigned long data)
331 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
334 : "r" (data), "r" ((2 << 16) | (entry << 3)),
335 "i" (ASI_ITLB_DATA_ACCESS));
338 #endif /* !(__ASSEMBLY__) */
340 #endif /* !(_SPARC64_SPITFIRE_H) */