arch/sparc/include/asm/spitfire.h

   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_SPARC64X     0x8a
  49 #define SUN4V_CHIP_UNKNOWN      0xff
  50
  51 #ifndef __ASSEMBLY__
  52
  53 enum ultra_tlb_layout {
  54         spitfire = 0,
  55         cheetah = 1,
  56         cheetah_plus = 2,
  57         hypervisor = 3,
  58 };
  59
  60 extern enum ultra_tlb_layout tlb_type;
  61
  62 extern int sun4v_chip_type;
  63
  64 extern int cheetah_pcache_forced_on;
  65 void cheetah_enable_pcache(void);
  66
  67 #define sparc64_highest_locked_tlbent() \
  68         (tlb_type == spitfire ? \
  69          SPITFIRE_HIGHEST_LOCKED_TLBENT : \
  70          CHEETAH_HIGHEST_LOCKED_TLBENT)
  71
  72 extern int num_kernel_image_mappings;
  73
  74 /* The data cache is write through, so this just invalidates the
  75  * specified line.
  76  */
  77 static inline void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
  78 {
  79         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
  80                              "membar    #Sync"
  81                              : /* No outputs */
  82                              : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
  83 }
  84
  85 /* The instruction cache lines are flushed with this, but note that
  86  * this does not flush the pipeline.  It is possible for a line to
  87  * get flushed but stale instructions to still be in the pipeline,
  88  * a flush instruction (to any address) is sufficient to handle
  89  * this issue after the line is invalidated.
  90  */
  91 static inline void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
  92 {
  93         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
  94                              "membar    #Sync"
  95                              : /* No outputs */
  96                              : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
  97 }
  98
  99 static inline unsigned long spitfire_get_dtlb_data(int entry)
 100 {
 101         unsigned long data;
 102
 103         __asm__ __volatile__("ldxa      [%1] %2, %0"
 104                              : "=r" (data)
 105                              : "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
 106
 107         /* Clear TTE diag bits. */
 108         data &= ~0x0003fe0000000000UL;
 109
 110         return data;
 111 }
 112
 113 static inline unsigned long spitfire_get_dtlb_tag(int entry)
 114 {
 115         unsigned long tag;
 116
 117         __asm__ __volatile__("ldxa      [%1] %2, %0"
 118                              : "=r" (tag)
 119                              : "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
 120         return tag;
 121 }
 122
 123 static inline void spitfire_put_dtlb_data(int entry, unsigned long data)
 124 {
 125         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 126                              "membar    #Sync"
 127                              : /* No outputs */
 128                              : "r" (data), "r" (entry << 3),
 129                                "i" (ASI_DTLB_DATA_ACCESS));
 130 }
 131
 132 static inline unsigned long spitfire_get_itlb_data(int entry)
 133 {
 134         unsigned long data;
 135
 136         __asm__ __volatile__("ldxa      [%1] %2, %0"
 137                              : "=r" (data)
 138                              : "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
 139
 140         /* Clear TTE diag bits. */
 141         data &= ~0x0003fe0000000000UL;
 142
 143         return data;
 144 }
 145
 146 static inline unsigned long spitfire_get_itlb_tag(int entry)
 147 {
 148         unsigned long tag;
 149
 150         __asm__ __volatile__("ldxa      [%1] %2, %0"
 151                              : "=r" (tag)
 152                              : "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
 153         return tag;
 154 }
 155
 156 static inline void spitfire_put_itlb_data(int entry, unsigned long data)
 157 {
 158         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 159                              "membar    #Sync"
 160                              : /* No outputs */
 161                              : "r" (data), "r" (entry << 3),
 162                                "i" (ASI_ITLB_DATA_ACCESS));
 163 }
 164
 165 static inline void spitfire_flush_dtlb_nucleus_page(unsigned long page)
 166 {
 167         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 168                              "membar    #Sync"
 169                              : /* No outputs */
 170                              : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
 171 }
 172
 173 static inline void spitfire_flush_itlb_nucleus_page(unsigned long page)
 174 {
 175         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 176                              "membar    #Sync"
 177                              : /* No outputs */
 178                              : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
 179 }
 180
 181 /* Cheetah has "all non-locked" tlb flushes. */
 182 static inline void cheetah_flush_dtlb_all(void)
 183 {
 184         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 185                              "membar    #Sync"
 186                              : /* No outputs */
 187                              : "r" (0x80), "i" (ASI_DMMU_DEMAP));
 188 }
 189
 190 static inline void cheetah_flush_itlb_all(void)
 191 {
 192         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 193                              "membar    #Sync"
 194                              : /* No outputs */
 195                              : "r" (0x80), "i" (ASI_IMMU_DEMAP));
 196 }
 197
 198 /* Cheetah has a 4-tlb layout so direct access is a bit different.
 199  * The first two TLBs are fully assosciative, hold 16 entries, and are
 200  * used only for locked and >8K sized translations.  One exists for
 201  * data accesses and one for instruction accesses.
 202  *
 203  * The third TLB is for data accesses to 8K non-locked translations, is
 204  * 2 way assosciative, and holds 512 entries.  The fourth TLB is for
 205  * instruction accesses to 8K non-locked translations, is 2 way
 206  * assosciative, and holds 128 entries.
 207  *
 208  * Cheetah has some bug where bogus data can be returned from
 209  * ASI_{D,I}TLB_DATA_ACCESS loads, doing the load twice fixes
 210  * the problem for me. -DaveM
 211  */
 212 static inline unsigned long cheetah_get_ldtlb_data(int entry)
 213 {
 214         unsigned long data;
 215
 216         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 217                              "ldxa      [%1] %2, %0"
 218                              : "=r" (data)
 219                              : "r" ((0 << 16) | (entry << 3)),
 220                              "i" (ASI_DTLB_DATA_ACCESS));
 221
 222         return data;
 223 }
 224
 225 static inline unsigned long cheetah_get_litlb_data(int entry)
 226 {
 227         unsigned long data;
 228
 229         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 230                              "ldxa      [%1] %2, %0"
 231                              : "=r" (data)
 232                              : "r" ((0 << 16) | (entry << 3)),
 233                              "i" (ASI_ITLB_DATA_ACCESS));
 234
 235         return data;
 236 }
 237
 238 static inline unsigned long cheetah_get_ldtlb_tag(int entry)
 239 {
 240         unsigned long tag;
 241
 242         __asm__ __volatile__("ldxa      [%1] %2, %0"
 243                              : "=r" (tag)
 244                              : "r" ((0 << 16) | (entry << 3)),
 245                              "i" (ASI_DTLB_TAG_READ));
 246
 247         return tag;
 248 }
 249
 250 static inline unsigned long cheetah_get_litlb_tag(int entry)
 251 {
 252         unsigned long tag;
 253
 254         __asm__ __volatile__("ldxa      [%1] %2, %0"
 255                              : "=r" (tag)
 256                              : "r" ((0 << 16) | (entry << 3)),
 257                              "i" (ASI_ITLB_TAG_READ));
 258
 259         return tag;
 260 }
 261
 262 static inline void cheetah_put_ldtlb_data(int entry, unsigned long data)
 263 {
 264         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 265                              "membar    #Sync"
 266                              : /* No outputs */
 267                              : "r" (data),
 268                                "r" ((0 << 16) | (entry << 3)),
 269                                "i" (ASI_DTLB_DATA_ACCESS));
 270 }
 271
 272 static inline void cheetah_put_litlb_data(int entry, unsigned long data)
 273 {
 274         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 275                              "membar    #Sync"
 276                              : /* No outputs */
 277                              : "r" (data),
 278                                "r" ((0 << 16) | (entry << 3)),
 279                                "i" (ASI_ITLB_DATA_ACCESS));
 280 }
 281
 282 static inline unsigned long cheetah_get_dtlb_data(int entry, int tlb)
 283 {
 284         unsigned long data;
 285
 286         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 287                              "ldxa      [%1] %2, %0"
 288                              : "=r" (data)
 289                              : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
 290
 291         return data;
 292 }
 293
 294 static inline unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
 295 {
 296         unsigned long tag;
 297
 298         __asm__ __volatile__("ldxa      [%1] %2, %0"
 299                              : "=r" (tag)
 300                              : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
 301         return tag;
 302 }
 303
 304 static inline void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
 305 {
 306         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 307                              "membar    #Sync"
 308                              : /* No outputs */
 309                              : "r" (data),
 310                                "r" ((tlb << 16) | (entry << 3)),
 311                                "i" (ASI_DTLB_DATA_ACCESS));
 312 }
 313
 314 static inline unsigned long cheetah_get_itlb_data(int entry)
 315 {
 316         unsigned long data;
 317
 318         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 319                              "ldxa      [%1] %2, %0"
 320                              : "=r" (data)
 321                              : "r" ((2 << 16) | (entry << 3)),
 322                                "i" (ASI_ITLB_DATA_ACCESS));
 323
 324         return data;
 325 }
 326
 327 static inline unsigned long cheetah_get_itlb_tag(int entry)
 328 {
 329         unsigned long tag;
 330
 331         __asm__ __volatile__("ldxa      [%1] %2, %0"
 332                              : "=r" (tag)
 333                              : "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
 334         return tag;
 335 }
 336
 337 static inline void cheetah_put_itlb_data(int entry, unsigned long data)
 338 {
 339         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 340                              "membar    #Sync"
 341                              : /* No outputs */
 342                              : "r" (data), "r" ((2 << 16) | (entry << 3)),
 343                                "i" (ASI_ITLB_DATA_ACCESS));
 344 }
 345
 346 #endif /* !(__ASSEMBLY__) */
 347 #endif /* CONFIG_SPARC64 */
 348 #endif /* !(_SPARC64_SPITFIRE_H) */