kernel/2.6.29.6-aldebaran-rt/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_UNKNOWN      0xff
  46
  47 #ifndef __ASSEMBLY__
  48
  49 enum ultra_tlb_layout {
  50         spitfire = 0,
  51         cheetah = 1,
  52         cheetah_plus = 2,
  53         hypervisor = 3,
  54 };
  55
  56 extern enum ultra_tlb_layout tlb_type;
  57
  58 extern int sun4v_chip_type;
  59
  60 extern int cheetah_pcache_forced_on;
  61 extern void cheetah_enable_pcache(void);
  62
  63 #define sparc64_highest_locked_tlbent() \
  64         (tlb_type == spitfire ? \
  65          SPITFIRE_HIGHEST_LOCKED_TLBENT : \
  66          CHEETAH_HIGHEST_LOCKED_TLBENT)
  67
  68 extern int num_kernel_image_mappings;
  69
  70 /* The data cache is write through, so this just invalidates the
  71  * specified line.
  72  */
  73 static inline void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
  74 {
  75         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
  76                              "membar    #Sync"
  77                              : /* No outputs */
  78                              : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
  79 }
  80
  81 /* The instruction cache lines are flushed with this, but note that
  82  * this does not flush the pipeline.  It is possible for a line to
  83  * get flushed but stale instructions to still be in the pipeline,
  84  * a flush instruction (to any address) is sufficient to handle
  85  * this issue after the line is invalidated.
  86  */
  87 static inline void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
  88 {
  89         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
  90                              "membar    #Sync"
  91                              : /* No outputs */
  92                              : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
  93 }
  94
  95 static inline unsigned long spitfire_get_dtlb_data(int entry)
  96 {
  97         unsigned long data;
  98
  99         __asm__ __volatile__("ldxa      [%1] %2, %0"
 100                              : "=r" (data)
 101                              : "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
 102
 103         /* Clear TTE diag bits. */
 104         data &= ~0x0003fe0000000000UL;
 105
 106         return data;
 107 }
 108
 109 static inline unsigned long spitfire_get_dtlb_tag(int entry)
 110 {
 111         unsigned long tag;
 112
 113         __asm__ __volatile__("ldxa      [%1] %2, %0"
 114                              : "=r" (tag)
 115                              : "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
 116         return tag;
 117 }
 118
 119 static inline void spitfire_put_dtlb_data(int entry, unsigned long data)
 120 {
 121         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 122                              "membar    #Sync"
 123                              : /* No outputs */
 124                              : "r" (data), "r" (entry << 3),
 125                                "i" (ASI_DTLB_DATA_ACCESS));
 126 }
 127
 128 static inline unsigned long spitfire_get_itlb_data(int entry)
 129 {
 130         unsigned long data;
 131
 132         __asm__ __volatile__("ldxa      [%1] %2, %0"
 133                              : "=r" (data)
 134                              : "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
 135
 136         /* Clear TTE diag bits. */
 137         data &= ~0x0003fe0000000000UL;
 138
 139         return data;
 140 }
 141
 142 static inline unsigned long spitfire_get_itlb_tag(int entry)
 143 {
 144         unsigned long tag;
 145
 146         __asm__ __volatile__("ldxa      [%1] %2, %0"
 147                              : "=r" (tag)
 148                              : "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
 149         return tag;
 150 }
 151
 152 static inline void spitfire_put_itlb_data(int entry, unsigned long data)
 153 {
 154         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 155                              "membar    #Sync"
 156                              : /* No outputs */
 157                              : "r" (data), "r" (entry << 3),
 158                                "i" (ASI_ITLB_DATA_ACCESS));
 159 }
 160
 161 static inline void spitfire_flush_dtlb_nucleus_page(unsigned long page)
 162 {
 163         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 164                              "membar    #Sync"
 165                              : /* No outputs */
 166                              : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
 167 }
 168
 169 static inline void spitfire_flush_itlb_nucleus_page(unsigned long page)
 170 {
 171         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 172                              "membar    #Sync"
 173                              : /* No outputs */
 174                              : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
 175 }
 176
 177 /* Cheetah has "all non-locked" tlb flushes. */
 178 static inline void cheetah_flush_dtlb_all(void)
 179 {
 180         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 181                              "membar    #Sync"
 182                              : /* No outputs */
 183                              : "r" (0x80), "i" (ASI_DMMU_DEMAP));
 184 }
 185
 186 static inline void cheetah_flush_itlb_all(void)
 187 {
 188         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 189                              "membar    #Sync"
 190                              : /* No outputs */
 191                              : "r" (0x80), "i" (ASI_IMMU_DEMAP));
 192 }
 193
 194 /* Cheetah has a 4-tlb layout so direct access is a bit different.
 195  * The first two TLBs are fully assosciative, hold 16 entries, and are
 196  * used only for locked and >8K sized translations.  One exists for
 197  * data accesses and one for instruction accesses.
 198  *
 199  * The third TLB is for data accesses to 8K non-locked translations, is
 200  * 2 way assosciative, and holds 512 entries.  The fourth TLB is for
 201  * instruction accesses to 8K non-locked translations, is 2 way
 202  * assosciative, and holds 128 entries.
 203  *
 204  * Cheetah has some bug where bogus data can be returned from
 205  * ASI_{D,I}TLB_DATA_ACCESS loads, doing the load twice fixes
 206  * the problem for me. -DaveM
 207  */
 208 static inline unsigned long cheetah_get_ldtlb_data(int entry)
 209 {
 210         unsigned long data;
 211
 212         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 213                              "ldxa      [%1] %2, %0"
 214                              : "=r" (data)
 215                              : "r" ((0 << 16) | (entry << 3)),
 216                              "i" (ASI_DTLB_DATA_ACCESS));
 217
 218         return data;
 219 }
 220
 221 static inline unsigned long cheetah_get_litlb_data(int entry)
 222 {
 223         unsigned long data;
 224
 225         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 226                              "ldxa      [%1] %2, %0"
 227                              : "=r" (data)
 228                              : "r" ((0 << 16) | (entry << 3)),
 229                              "i" (ASI_ITLB_DATA_ACCESS));
 230
 231         return data;
 232 }
 233
 234 static inline unsigned long cheetah_get_ldtlb_tag(int entry)
 235 {
 236         unsigned long tag;
 237
 238         __asm__ __volatile__("ldxa      [%1] %2, %0"
 239                              : "=r" (tag)
 240                              : "r" ((0 << 16) | (entry << 3)),
 241                              "i" (ASI_DTLB_TAG_READ));
 242
 243         return tag;
 244 }
 245
 246 static inline unsigned long cheetah_get_litlb_tag(int entry)
 247 {
 248         unsigned long tag;
 249
 250         __asm__ __volatile__("ldxa      [%1] %2, %0"
 251                              : "=r" (tag)
 252                              : "r" ((0 << 16) | (entry << 3)),
 253                              "i" (ASI_ITLB_TAG_READ));
 254
 255         return tag;
 256 }
 257
 258 static inline void cheetah_put_ldtlb_data(int entry, unsigned long data)
 259 {
 260         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 261                              "membar    #Sync"
 262                              : /* No outputs */
 263                              : "r" (data),
 264                                "r" ((0 << 16) | (entry << 3)),
 265                                "i" (ASI_DTLB_DATA_ACCESS));
 266 }
 267
 268 static inline void cheetah_put_litlb_data(int entry, unsigned long data)
 269 {
 270         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 271                              "membar    #Sync"
 272                              : /* No outputs */
 273                              : "r" (data),
 274                                "r" ((0 << 16) | (entry << 3)),
 275                                "i" (ASI_ITLB_DATA_ACCESS));
 276 }
 277
 278 static inline unsigned long cheetah_get_dtlb_data(int entry, int tlb)
 279 {
 280         unsigned long data;
 281
 282         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 283                              "ldxa      [%1] %2, %0"
 284                              : "=r" (data)
 285                              : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
 286
 287         return data;
 288 }
 289
 290 static inline unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
 291 {
 292         unsigned long tag;
 293
 294         __asm__ __volatile__("ldxa      [%1] %2, %0"
 295                              : "=r" (tag)
 296                              : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
 297         return tag;
 298 }
 299
 300 static inline void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
 301 {
 302         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 303                              "membar    #Sync"
 304                              : /* No outputs */
 305                              : "r" (data),
 306                                "r" ((tlb << 16) | (entry << 3)),
 307                                "i" (ASI_DTLB_DATA_ACCESS));
 308 }
 309
 310 static inline unsigned long cheetah_get_itlb_data(int entry)
 311 {
 312         unsigned long data;
 313
 314         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 315                              "ldxa      [%1] %2, %0"
 316                              : "=r" (data)
 317                              : "r" ((2 << 16) | (entry << 3)),
 318                                "i" (ASI_ITLB_DATA_ACCESS));
 319
 320         return data;
 321 }
 322
 323 static inline unsigned long cheetah_get_itlb_tag(int entry)
 324 {
 325         unsigned long tag;
 326
 327         __asm__ __volatile__("ldxa      [%1] %2, %0"
 328                              : "=r" (tag)
 329                              : "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
 330         return tag;
 331 }
 332
 333 static inline void cheetah_put_itlb_data(int entry, unsigned long data)
 334 {
 335         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 336                              "membar    #Sync"
 337                              : /* No outputs */
 338                              : "r" (data), "r" ((2 << 16) | (entry << 3)),
 339                                "i" (ASI_ITLB_DATA_ACCESS));
 340 }
 341
 342 #endif /* !(__ASSEMBLY__) */
 343 #endif /* CONFIG_SPARC64 */
 344 #endif /* !(_SPARC64_SPITFIRE_H) */