include/asm-sparc64/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 #include <asm/asi.h>
  10
  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.
  14  */
  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              */
  25
  26 /* These registers only exist as one entity, and are accessed
  27  * via ASI_DMMU only.
  28  */
  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
  34
  35 #define SPITFIRE_HIGHEST_LOCKED_TLBENT  (64 - 1)
  36 #define CHEETAH_HIGHEST_LOCKED_TLBENT   (16 - 1)
  37
  38 #define L1DCACHE_SIZE           0x4000
  39
  40 #define SUN4V_CHIP_INVALID      0x00
  41 #define SUN4V_CHIP_NIAGARA1     0x01
  42 #define SUN4V_CHIP_NIAGARA2     0x02
  43 #define SUN4V_CHIP_UNKNOWN      0xff
  44
  45 #ifndef __ASSEMBLY__
  46
  47 enum ultra_tlb_layout {
  48         spitfire = 0,
  49         cheetah = 1,
  50         cheetah_plus = 2,
  51         hypervisor = 3,
  52 };
  53
  54 extern enum ultra_tlb_layout tlb_type;
  55
  56 extern int sun4v_chip_type;
  57
  58 extern int cheetah_pcache_forced_on;
  59 extern void cheetah_enable_pcache(void);
  60
  61 #define sparc64_highest_locked_tlbent() \
  62         (tlb_type == spitfire ? \
  63          SPITFIRE_HIGHEST_LOCKED_TLBENT : \
  64          CHEETAH_HIGHEST_LOCKED_TLBENT)
  65
  66 extern int num_kernel_image_mappings;
  67
  68 /* The data cache is write through, so this just invalidates the
  69  * specified line.
  70  */
  71 static inline void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
  72 {
  73         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
  74                              "membar    #Sync"
  75                              : /* No outputs */
  76                              : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
  77 }
  78
  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.
  84  */
  85 static inline void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
  86 {
  87         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
  88                              "membar    #Sync"
  89                              : /* No outputs */
  90                              : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
  91 }
  92
  93 static inline unsigned long spitfire_get_dtlb_data(int entry)
  94 {
  95         unsigned long data;
  96
  97         __asm__ __volatile__("ldxa      [%1] %2, %0"
  98                              : "=r" (data)
  99                              : "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
 100
 101         /* Clear TTE diag bits. */
 102         data &= ~0x0003fe0000000000UL;
 103
 104         return data;
 105 }
 106
 107 static inline unsigned long spitfire_get_dtlb_tag(int entry)
 108 {
 109         unsigned long tag;
 110
 111         __asm__ __volatile__("ldxa      [%1] %2, %0"
 112                              : "=r" (tag)
 113                              : "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
 114         return tag;
 115 }
 116
 117 static inline void spitfire_put_dtlb_data(int entry, unsigned long data)
 118 {
 119         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 120                              "membar    #Sync"
 121                              : /* No outputs */
 122                              : "r" (data), "r" (entry << 3),
 123                                "i" (ASI_DTLB_DATA_ACCESS));
 124 }
 125
 126 static inline unsigned long spitfire_get_itlb_data(int entry)
 127 {
 128         unsigned long data;
 129
 130         __asm__ __volatile__("ldxa      [%1] %2, %0"
 131                              : "=r" (data)
 132                              : "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
 133
 134         /* Clear TTE diag bits. */
 135         data &= ~0x0003fe0000000000UL;
 136
 137         return data;
 138 }
 139
 140 static inline unsigned long spitfire_get_itlb_tag(int entry)
 141 {
 142         unsigned long tag;
 143
 144         __asm__ __volatile__("ldxa      [%1] %2, %0"
 145                              : "=r" (tag)
 146                              : "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
 147         return tag;
 148 }
 149
 150 static inline void spitfire_put_itlb_data(int entry, unsigned long data)
 151 {
 152         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 153                              "membar    #Sync"
 154                              : /* No outputs */
 155                              : "r" (data), "r" (entry << 3),
 156                                "i" (ASI_ITLB_DATA_ACCESS));
 157 }
 158
 159 static inline void spitfire_flush_dtlb_nucleus_page(unsigned long page)
 160 {
 161         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 162                              "membar    #Sync"
 163                              : /* No outputs */
 164                              : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
 165 }
 166
 167 static inline void spitfire_flush_itlb_nucleus_page(unsigned long page)
 168 {
 169         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 170                              "membar    #Sync"
 171                              : /* No outputs */
 172                              : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
 173 }
 174
 175 /* Cheetah has "all non-locked" tlb flushes. */
 176 static inline void cheetah_flush_dtlb_all(void)
 177 {
 178         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 179                              "membar    #Sync"
 180                              : /* No outputs */
 181                              : "r" (0x80), "i" (ASI_DMMU_DEMAP));
 182 }
 183
 184 static inline void cheetah_flush_itlb_all(void)
 185 {
 186         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 187                              "membar    #Sync"
 188                              : /* No outputs */
 189                              : "r" (0x80), "i" (ASI_IMMU_DEMAP));
 190 }
 191
 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.
 196  *
 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.
 201  *
 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
 205  */
 206 static inline unsigned long cheetah_get_ldtlb_data(int entry)
 207 {
 208         unsigned long data;
 209
 210         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 211                              "ldxa      [%1] %2, %0"
 212                              : "=r" (data)
 213                              : "r" ((0 << 16) | (entry << 3)),
 214                              "i" (ASI_DTLB_DATA_ACCESS));
 215
 216         return data;
 217 }
 218
 219 static inline unsigned long cheetah_get_litlb_data(int entry)
 220 {
 221         unsigned long data;
 222
 223         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 224                              "ldxa      [%1] %2, %0"
 225                              : "=r" (data)
 226                              : "r" ((0 << 16) | (entry << 3)),
 227                              "i" (ASI_ITLB_DATA_ACCESS));
 228
 229         return data;
 230 }
 231
 232 static inline unsigned long cheetah_get_ldtlb_tag(int entry)
 233 {
 234         unsigned long tag;
 235
 236         __asm__ __volatile__("ldxa      [%1] %2, %0"
 237                              : "=r" (tag)
 238                              : "r" ((0 << 16) | (entry << 3)),
 239                              "i" (ASI_DTLB_TAG_READ));
 240
 241         return tag;
 242 }
 243
 244 static inline unsigned long cheetah_get_litlb_tag(int entry)
 245 {
 246         unsigned long tag;
 247
 248         __asm__ __volatile__("ldxa      [%1] %2, %0"
 249                              : "=r" (tag)
 250                              : "r" ((0 << 16) | (entry << 3)),
 251                              "i" (ASI_ITLB_TAG_READ));
 252
 253         return tag;
 254 }
 255
 256 static inline void cheetah_put_ldtlb_data(int entry, unsigned long data)
 257 {
 258         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 259                              "membar    #Sync"
 260                              : /* No outputs */
 261                              : "r" (data),
 262                                "r" ((0 << 16) | (entry << 3)),
 263                                "i" (ASI_DTLB_DATA_ACCESS));
 264 }
 265
 266 static inline void cheetah_put_litlb_data(int entry, unsigned long data)
 267 {
 268         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 269                              "membar    #Sync"
 270                              : /* No outputs */
 271                              : "r" (data),
 272                                "r" ((0 << 16) | (entry << 3)),
 273                                "i" (ASI_ITLB_DATA_ACCESS));
 274 }
 275
 276 static inline unsigned long cheetah_get_dtlb_data(int entry, int tlb)
 277 {
 278         unsigned long data;
 279
 280         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 281                              "ldxa      [%1] %2, %0"
 282                              : "=r" (data)
 283                              : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
 284
 285         return data;
 286 }
 287
 288 static inline unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
 289 {
 290         unsigned long tag;
 291
 292         __asm__ __volatile__("ldxa      [%1] %2, %0"
 293                              : "=r" (tag)
 294                              : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
 295         return tag;
 296 }
 297
 298 static inline void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
 299 {
 300         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 301                              "membar    #Sync"
 302                              : /* No outputs */
 303                              : "r" (data),
 304                                "r" ((tlb << 16) | (entry << 3)),
 305                                "i" (ASI_DTLB_DATA_ACCESS));
 306 }
 307
 308 static inline unsigned long cheetah_get_itlb_data(int entry)
 309 {
 310         unsigned long data;
 311
 312         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 313                              "ldxa      [%1] %2, %0"
 314                              : "=r" (data)
 315                              : "r" ((2 << 16) | (entry << 3)),
 316                                "i" (ASI_ITLB_DATA_ACCESS));
 317
 318         return data;
 319 }
 320
 321 static inline unsigned long cheetah_get_itlb_tag(int entry)
 322 {
 323         unsigned long tag;
 324
 325         __asm__ __volatile__("ldxa      [%1] %2, %0"
 326                              : "=r" (tag)
 327                              : "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
 328         return tag;
 329 }
 330
 331 static inline void cheetah_put_itlb_data(int entry, unsigned long data)
 332 {
 333         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 334                              "membar    #Sync"
 335                              : /* No outputs */
 336                              : "r" (data), "r" ((2 << 16) | (entry << 3)),
 337                                "i" (ASI_ITLB_DATA_ACCESS));
 338 }
 339
 340 #endif /* !(__ASSEMBLY__) */
 341
 342 #endif /* !(_SPARC64_SPITFIRE_H) */