arch/sparc/include/asm/spitfire.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* spitfire.h: SpitFire/BlackBird/Cheetah inline MMU operations.
   3  *
   4  * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
   5  */
   6
   7 #ifndef _SPARC64_SPITFIRE_H
   8 #define _SPARC64_SPITFIRE_H
   9
  10 #ifdef CONFIG_SPARC64
  11
  12 #include <asm/asi.h>
  13
  14 /* The following register addresses are accessible via ASI_DMMU
  15  * and ASI_IMMU, that is there is a distinct and unique copy of
  16  * each these registers for each TLB.
  17  */
  18 #define TSB_TAG_TARGET          0x0000000000000000 /* All chips                         */
  19 #define TLB_SFSR                0x0000000000000018 /* All chips                         */
  20 #define TSB_REG                 0x0000000000000028 /* All chips                         */
  21 #define TLB_TAG_ACCESS          0x0000000000000030 /* All chips                         */
  22 #define VIRT_WATCHPOINT         0x0000000000000038 /* All chips                         */
  23 #define PHYS_WATCHPOINT         0x0000000000000040 /* All chips                         */
  24 #define TSB_EXTENSION_P         0x0000000000000048 /* Ultra-III and later               */
  25 #define TSB_EXTENSION_S         0x0000000000000050 /* Ultra-III and later, D-TLB only   */
  26 #define TSB_EXTENSION_N         0x0000000000000058 /* Ultra-III and later               */
  27 #define TLB_TAG_ACCESS_EXT      0x0000000000000060 /* Ultra-III+ and later              */
  28
  29 /* These registers only exist as one entity, and are accessed
  30  * via ASI_DMMU only.
  31  */
  32 #define PRIMARY_CONTEXT         0x0000000000000008
  33 #define SECONDARY_CONTEXT       0x0000000000000010
  34 #define DMMU_SFAR               0x0000000000000020
  35 #define VIRT_WATCHPOINT         0x0000000000000038
  36 #define PHYS_WATCHPOINT         0x0000000000000040
  37
  38 #define SPITFIRE_HIGHEST_LOCKED_TLBENT  (64 - 1)
  39 #define CHEETAH_HIGHEST_LOCKED_TLBENT   (16 - 1)
  40
  41 #define L1DCACHE_SIZE           0x4000
  42
  43 #define SUN4V_CHIP_INVALID      0x00
  44 #define SUN4V_CHIP_NIAGARA1     0x01
  45 #define SUN4V_CHIP_NIAGARA2     0x02
  46 #define SUN4V_CHIP_NIAGARA3     0x03
  47 #define SUN4V_CHIP_NIAGARA4     0x04
  48 #define SUN4V_CHIP_NIAGARA5     0x05
  49 #define SUN4V_CHIP_SPARC_M6     0x06
  50 #define SUN4V_CHIP_SPARC_M7     0x07
  51 #define SUN4V_CHIP_SPARC_M8     0x08
  52 #define SUN4V_CHIP_SPARC64X     0x8a
  53 #define SUN4V_CHIP_SPARC_SN     0x8b
  54 #define SUN4V_CHIP_UNKNOWN      0xff
  55
  56 /*
  57  * The following CPU_ID_xxx constants are used
  58  * to identify the CPU type in the setup phase
  59  * (see head_64.S)
  60  */
  61 #define CPU_ID_NIAGARA1         ('1')
  62 #define CPU_ID_NIAGARA2         ('2')
  63 #define CPU_ID_NIAGARA3         ('3')
  64 #define CPU_ID_NIAGARA4         ('4')
  65 #define CPU_ID_NIAGARA5         ('5')
  66 #define CPU_ID_M6               ('6')
  67 #define CPU_ID_M7               ('7')
  68 #define CPU_ID_M8               ('8')
  69 #define CPU_ID_SONOMA1          ('N')
  70
  71 #ifndef __ASSEMBLY__
  72
  73 enum ultra_tlb_layout {
  74         spitfire = 0,
  75         cheetah = 1,
  76         cheetah_plus = 2,
  77         hypervisor = 3,
  78 };
  79
  80 extern enum ultra_tlb_layout tlb_type;
  81
  82 extern int sun4v_chip_type;
  83
  84 extern int cheetah_pcache_forced_on;
  85 void cheetah_enable_pcache(void);
  86
  87 #define sparc64_highest_locked_tlbent() \
  88         (tlb_type == spitfire ? \
  89          SPITFIRE_HIGHEST_LOCKED_TLBENT : \
  90          CHEETAH_HIGHEST_LOCKED_TLBENT)
  91
  92 extern int num_kernel_image_mappings;
  93
  94 /* The data cache is write through, so this just invalidates the
  95  * specified line.
  96  */
  97 static inline void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
  98 {
  99         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 100                              "membar    #Sync"
 101                              : /* No outputs */
 102                              : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
 103 }
 104
 105 /* The instruction cache lines are flushed with this, but note that
 106  * this does not flush the pipeline.  It is possible for a line to
 107  * get flushed but stale instructions to still be in the pipeline,
 108  * a flush instruction (to any address) is sufficient to handle
 109  * this issue after the line is invalidated.
 110  */
 111 static inline void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
 112 {
 113         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 114                              "membar    #Sync"
 115                              : /* No outputs */
 116                              : "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
 117 }
 118
 119 static inline unsigned long spitfire_get_dtlb_data(int entry)
 120 {
 121         unsigned long data;
 122
 123         __asm__ __volatile__("ldxa      [%1] %2, %0"
 124                              : "=r" (data)
 125                              : "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
 126
 127         /* Clear TTE diag bits. */
 128         data &= ~0x0003fe0000000000UL;
 129
 130         return data;
 131 }
 132
 133 static inline unsigned long spitfire_get_dtlb_tag(int entry)
 134 {
 135         unsigned long tag;
 136
 137         __asm__ __volatile__("ldxa      [%1] %2, %0"
 138                              : "=r" (tag)
 139                              : "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
 140         return tag;
 141 }
 142
 143 static inline void spitfire_put_dtlb_data(int entry, unsigned long data)
 144 {
 145         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 146                              "membar    #Sync"
 147                              : /* No outputs */
 148                              : "r" (data), "r" (entry << 3),
 149                                "i" (ASI_DTLB_DATA_ACCESS));
 150 }
 151
 152 static inline unsigned long spitfire_get_itlb_data(int entry)
 153 {
 154         unsigned long data;
 155
 156         __asm__ __volatile__("ldxa      [%1] %2, %0"
 157                              : "=r" (data)
 158                              : "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
 159
 160         /* Clear TTE diag bits. */
 161         data &= ~0x0003fe0000000000UL;
 162
 163         return data;
 164 }
 165
 166 static inline unsigned long spitfire_get_itlb_tag(int entry)
 167 {
 168         unsigned long tag;
 169
 170         __asm__ __volatile__("ldxa      [%1] %2, %0"
 171                              : "=r" (tag)
 172                              : "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
 173         return tag;
 174 }
 175
 176 static inline void spitfire_put_itlb_data(int entry, unsigned long data)
 177 {
 178         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 179                              "membar    #Sync"
 180                              : /* No outputs */
 181                              : "r" (data), "r" (entry << 3),
 182                                "i" (ASI_ITLB_DATA_ACCESS));
 183 }
 184
 185 static inline void spitfire_flush_dtlb_nucleus_page(unsigned long page)
 186 {
 187         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 188                              "membar    #Sync"
 189                              : /* No outputs */
 190                              : "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
 191 }
 192
 193 static inline void spitfire_flush_itlb_nucleus_page(unsigned long page)
 194 {
 195         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 196                              "membar    #Sync"
 197                              : /* No outputs */
 198                              : "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
 199 }
 200
 201 /* Cheetah has "all non-locked" tlb flushes. */
 202 static inline void cheetah_flush_dtlb_all(void)
 203 {
 204         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 205                              "membar    #Sync"
 206                              : /* No outputs */
 207                              : "r" (0x80), "i" (ASI_DMMU_DEMAP));
 208 }
 209
 210 static inline void cheetah_flush_itlb_all(void)
 211 {
 212         __asm__ __volatile__("stxa      %%g0, [%0] %1\n\t"
 213                              "membar    #Sync"
 214                              : /* No outputs */
 215                              : "r" (0x80), "i" (ASI_IMMU_DEMAP));
 216 }
 217
 218 /* Cheetah has a 4-tlb layout so direct access is a bit different.
 219  * The first two TLBs are fully assosciative, hold 16 entries, and are
 220  * used only for locked and >8K sized translations.  One exists for
 221  * data accesses and one for instruction accesses.
 222  *
 223  * The third TLB is for data accesses to 8K non-locked translations, is
 224  * 2 way assosciative, and holds 512 entries.  The fourth TLB is for
 225  * instruction accesses to 8K non-locked translations, is 2 way
 226  * assosciative, and holds 128 entries.
 227  *
 228  * Cheetah has some bug where bogus data can be returned from
 229  * ASI_{D,I}TLB_DATA_ACCESS loads, doing the load twice fixes
 230  * the problem for me. -DaveM
 231  */
 232 static inline unsigned long cheetah_get_ldtlb_data(int entry)
 233 {
 234         unsigned long data;
 235
 236         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 237                              "ldxa      [%1] %2, %0"
 238                              : "=r" (data)
 239                              : "r" ((0 << 16) | (entry << 3)),
 240                              "i" (ASI_DTLB_DATA_ACCESS));
 241
 242         return data;
 243 }
 244
 245 static inline unsigned long cheetah_get_litlb_data(int entry)
 246 {
 247         unsigned long data;
 248
 249         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 250                              "ldxa      [%1] %2, %0"
 251                              : "=r" (data)
 252                              : "r" ((0 << 16) | (entry << 3)),
 253                              "i" (ASI_ITLB_DATA_ACCESS));
 254
 255         return data;
 256 }
 257
 258 static inline unsigned long cheetah_get_ldtlb_tag(int entry)
 259 {
 260         unsigned long tag;
 261
 262         __asm__ __volatile__("ldxa      [%1] %2, %0"
 263                              : "=r" (tag)
 264                              : "r" ((0 << 16) | (entry << 3)),
 265                              "i" (ASI_DTLB_TAG_READ));
 266
 267         return tag;
 268 }
 269
 270 static inline unsigned long cheetah_get_litlb_tag(int entry)
 271 {
 272         unsigned long tag;
 273
 274         __asm__ __volatile__("ldxa      [%1] %2, %0"
 275                              : "=r" (tag)
 276                              : "r" ((0 << 16) | (entry << 3)),
 277                              "i" (ASI_ITLB_TAG_READ));
 278
 279         return tag;
 280 }
 281
 282 static inline void cheetah_put_ldtlb_data(int entry, unsigned long data)
 283 {
 284         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 285                              "membar    #Sync"
 286                              : /* No outputs */
 287                              : "r" (data),
 288                                "r" ((0 << 16) | (entry << 3)),
 289                                "i" (ASI_DTLB_DATA_ACCESS));
 290 }
 291
 292 static inline void cheetah_put_litlb_data(int entry, unsigned long data)
 293 {
 294         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 295                              "membar    #Sync"
 296                              : /* No outputs */
 297                              : "r" (data),
 298                                "r" ((0 << 16) | (entry << 3)),
 299                                "i" (ASI_ITLB_DATA_ACCESS));
 300 }
 301
 302 static inline unsigned long cheetah_get_dtlb_data(int entry, int tlb)
 303 {
 304         unsigned long data;
 305
 306         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 307                              "ldxa      [%1] %2, %0"
 308                              : "=r" (data)
 309                              : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
 310
 311         return data;
 312 }
 313
 314 static inline unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
 315 {
 316         unsigned long tag;
 317
 318         __asm__ __volatile__("ldxa      [%1] %2, %0"
 319                              : "=r" (tag)
 320                              : "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
 321         return tag;
 322 }
 323
 324 static inline void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
 325 {
 326         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 327                              "membar    #Sync"
 328                              : /* No outputs */
 329                              : "r" (data),
 330                                "r" ((tlb << 16) | (entry << 3)),
 331                                "i" (ASI_DTLB_DATA_ACCESS));
 332 }
 333
 334 static inline unsigned long cheetah_get_itlb_data(int entry)
 335 {
 336         unsigned long data;
 337
 338         __asm__ __volatile__("ldxa      [%1] %2, %%g0\n\t"
 339                              "ldxa      [%1] %2, %0"
 340                              : "=r" (data)
 341                              : "r" ((2 << 16) | (entry << 3)),
 342                                "i" (ASI_ITLB_DATA_ACCESS));
 343
 344         return data;
 345 }
 346
 347 static inline unsigned long cheetah_get_itlb_tag(int entry)
 348 {
 349         unsigned long tag;
 350
 351         __asm__ __volatile__("ldxa      [%1] %2, %0"
 352                              : "=r" (tag)
 353                              : "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
 354         return tag;
 355 }
 356
 357 static inline void cheetah_put_itlb_data(int entry, unsigned long data)
 358 {
 359         __asm__ __volatile__("stxa      %0, [%1] %2\n\t"
 360                              "membar    #Sync"
 361                              : /* No outputs */
 362                              : "r" (data), "r" ((2 << 16) | (entry << 3)),
 363                                "i" (ASI_ITLB_DATA_ACCESS));
 364 }
 365
 366 #endif /* !(__ASSEMBLY__) */
 367 #endif /* CONFIG_SPARC64 */
 368 #endif /* !(_SPARC64_SPITFIRE_H) */