Ignore:
File:
1 edited

Legend:

Unmodified
Added
Removed

  • kernel/arch/sparc64/include/mm/tlb.h

    r98000fb r8c2214e  
    3636#define KERN_sparc64_TLB_H_
    3737
    38 #if defined (US)
    39 #define ITLB_ENTRY_COUNT                64
    40 #define DTLB_ENTRY_COUNT                64
    41 #define DTLB_MAX_LOCKED_ENTRIES         DTLB_ENTRY_COUNT
     38
     39#if defined (SUN4U)
     40#include <arch/mm/sun4u/tlb.h>
     41#elif defined (SUN4V)
     42#include <arch/mm/sun4v/tlb.h>
    4243#endif
    43 
    44 /** TLB_DSMALL is the only of the three DMMUs that can hold locked entries. */
    45 #if defined (US3)
    46 #define DTLB_MAX_LOCKED_ENTRIES         16
    47 #endif
    48 
    49 #define MEM_CONTEXT_KERNEL              0
    50 #define MEM_CONTEXT_TEMP                1
    51 
    52 /** Page sizes. */
    53 #define PAGESIZE_8K     0
    54 #define PAGESIZE_64K    1
    55 #define PAGESIZE_512K   2
    56 #define PAGESIZE_4M     3
    57 
    58 /** Bit width of the TLB-locked portion of kernel address space. */
    59 #define KERNEL_PAGE_WIDTH       22      /* 4M */
    60 
    61 /* TLB Demap Operation types. */
    62 #define TLB_DEMAP_PAGE          0
    63 #define TLB_DEMAP_CONTEXT       1
    64 #if defined (US3)
    65 #define TLB_DEMAP_ALL           2
    66 #endif
    67 
    68 #define TLB_DEMAP_TYPE_SHIFT    6
    69 
    70 /* TLB Demap Operation Context register encodings. */
    71 #define TLB_DEMAP_PRIMARY       0
    72 #define TLB_DEMAP_SECONDARY     1
    73 #define TLB_DEMAP_NUCLEUS       2
    74 
    75 /* There are more TLBs in one MMU in US3, their codes are defined here. */
    76 #if defined (US3)
    77 /* D-MMU: one small (16-entry) TLB and two big (512-entry) TLBs */
    78 #define TLB_DSMALL      0
    79 #define TLB_DBIG_0      2
    80 #define TLB_DBIG_1      3
    81        
    82 /* I-MMU: one small (16-entry) TLB and one big TLB */
    83 #define TLB_ISMALL      0
    84 #define TLB_IBIG        2
    85 #endif
    86 
    87 #define TLB_DEMAP_CONTEXT_SHIFT 4
    88 
    89 /* TLB Tag Access shifts */
    90 #define TLB_TAG_ACCESS_CONTEXT_SHIFT    0
    91 #define TLB_TAG_ACCESS_CONTEXT_MASK     ((1 << 13) - 1)
    92 #define TLB_TAG_ACCESS_VPN_SHIFT        13
    93 
    94 #ifndef __ASM__
    95 
    96 #include <arch/mm/tte.h>
    97 #include <arch/mm/mmu.h>
    98 #include <arch/mm/page.h>
    99 #include <arch/asm.h>
    100 #include <arch/barrier.h>
    101 #include <arch/types.h>
    102 #include <arch/register.h>
    103 #include <arch/cpu.h>
    104 
    105 union tlb_context_reg {
    106         uint64_t v;
    107         struct {
    108                 unsigned long : 51;
    109                 unsigned context : 13;          /**< Context/ASID. */
    110         } __attribute__ ((packed));
    111 };
    112 typedef union tlb_context_reg tlb_context_reg_t;
    113 
    114 /** I-/D-TLB Data In/Access Register type. */
    115 typedef tte_data_t tlb_data_t;
    116 
    117 /** I-/D-TLB Data Access Address in Alternate Space. */
    118 
    119 #if defined (US)
    120 
    121 union tlb_data_access_addr {
    122         uint64_t value;
    123         struct {
    124                 uint64_t : 55;
    125                 unsigned tlb_entry : 6;
    126                 unsigned : 3;
    127         } __attribute__ ((packed));
    128 };
    129 typedef union tlb_data_access_addr dtlb_data_access_addr_t;
    130 typedef union tlb_data_access_addr dtlb_tag_read_addr_t;
    131 typedef union tlb_data_access_addr itlb_data_access_addr_t;
    132 typedef union tlb_data_access_addr itlb_tag_read_addr_t;
    133 
    134 #elif defined (US3)
    135 
    136 /*
    137  * In US3, I-MMU and D-MMU have different formats of the data
    138  * access register virtual address. In the corresponding
    139  * structures the member variable for the entry number is
    140  * called "local_tlb_entry" - it contrasts with the "tlb_entry"
    141  * for the US data access register VA structure. The rationale
    142  * behind this is to prevent careless mistakes in the code
    143  * caused by setting only the entry number and not the TLB
    144  * number in the US3 code (when taking the code from US).
    145  */
    146 
    147 union dtlb_data_access_addr {
    148         uint64_t value;
    149         struct {
    150                 uint64_t : 45;
    151                 unsigned : 1;
    152                 unsigned tlb_number : 2;
    153                 unsigned : 4;
    154                 unsigned local_tlb_entry : 9;
    155                 unsigned : 3;
    156         } __attribute__ ((packed));
    157 };
    158 typedef union dtlb_data_access_addr dtlb_data_access_addr_t;
    159 typedef union dtlb_data_access_addr dtlb_tag_read_addr_t;
    160 
    161 union itlb_data_access_addr {
    162         uint64_t value;
    163         struct {
    164                 uint64_t : 45;
    165                 unsigned : 1;
    166                 unsigned tlb_number : 2;
    167                 unsigned : 6;
    168                 unsigned local_tlb_entry : 7;
    169                 unsigned : 3;
    170         } __attribute__ ((packed));
    171 };
    172 typedef union itlb_data_access_addr itlb_data_access_addr_t;
    173 typedef union itlb_data_access_addr itlb_tag_read_addr_t;
    174 
    175 #endif
    176 
    177 /** I-/D-TLB Tag Read Register. */
    178 union tlb_tag_read_reg {
    179         uint64_t value;
    180         struct {
    181                 uint64_t vpn : 51;      /**< Virtual Address bits 63:13. */
    182                 unsigned context : 13;  /**< Context identifier. */
    183         } __attribute__ ((packed));
    184 };
    185 typedef union tlb_tag_read_reg tlb_tag_read_reg_t;
    186 typedef union tlb_tag_read_reg tlb_tag_access_reg_t;
    187 
    188 
    189 /** TLB Demap Operation Address. */
    190 union tlb_demap_addr {
    191         uint64_t value;
    192         struct {
    193                 uint64_t vpn: 51;       /**< Virtual Address bits 63:13. */
    194 #if defined (US)
    195                 unsigned : 6;           /**< Ignored. */
    196                 unsigned type : 1;      /**< The type of demap operation. */
    197 #elif defined (US3)
    198                 unsigned : 5;           /**< Ignored. */
    199                 unsigned type: 2;       /**< The type of demap operation. */
    200 #endif
    201                 unsigned context : 2;   /**< Context register selection. */
    202                 unsigned : 4;           /**< Zero. */
    203         } __attribute__ ((packed));
    204 };
    205 typedef union tlb_demap_addr tlb_demap_addr_t;
    206 
    207 /** TLB Synchronous Fault Status Register. */
    208 union tlb_sfsr_reg {
    209         uint64_t value;
    210         struct {
    211 #if defined (US)
    212                 unsigned long : 40;     /**< Implementation dependent. */
    213                 unsigned asi : 8;       /**< ASI. */
    214                 unsigned : 2;
    215                 unsigned ft : 7;        /**< Fault type. */
    216 #elif defined (US3)
    217                 unsigned long : 39;     /**< Implementation dependent. */
    218                 unsigned nf : 1;        /**< Non-faulting load. */
    219                 unsigned asi : 8;       /**< ASI. */
    220                 unsigned tm : 1;        /**< I-TLB miss. */
    221                 unsigned : 3;           /**< Reserved. */
    222                 unsigned ft : 5;        /**< Fault type. */
    223 #endif
    224                 unsigned e : 1;         /**< Side-effect bit. */
    225                 unsigned ct : 2;        /**< Context Register selection. */
    226                 unsigned pr : 1;        /**< Privilege bit. */
    227                 unsigned w : 1;         /**< Write bit. */
    228                 unsigned ow : 1;        /**< Overwrite bit. */
    229                 unsigned fv : 1;        /**< Fault Valid bit. */
    230         } __attribute__ ((packed));
    231 };
    232 typedef union tlb_sfsr_reg tlb_sfsr_reg_t;
    233 
    234 #if defined (US3)
    235 
    236 /*
    237  * Functions for determining the number of entries in TLBs. They either return
    238  * a constant value or a value based on the CPU autodetection.
    239  */
    240 
    241 /**
    242  * Determine the number of entries in the DMMU's small TLB.
    243  */
    244 static inline uint16_t tlb_dsmall_size(void)
    245 {
    246         return 16;
    247 }
    248 
    249 /**
    250  * Determine the number of entries in each DMMU's big TLB.
    251  */
    252 static inline uint16_t tlb_dbig_size(void)
    253 {
    254         return 512;
    255 }
    256 
    257 /**
    258  * Determine the number of entries in the IMMU's small TLB.
    259  */
    260 static inline uint16_t tlb_ismall_size(void)
    261 {
    262         return 16;
    263 }
    264 
    265 /**
    266  * Determine the number of entries in the IMMU's big TLB.
    267  */
    268 static inline uint16_t tlb_ibig_size(void)
    269 {
    270         if (((ver_reg_t) ver_read()).impl == IMPL_ULTRASPARCIV_PLUS)
    271                 return 512;
    272         else
    273                 return 128;
    274 }
    275 
    276 #endif
    277 
    278 /** Read MMU Primary Context Register.
    279  *
    280  * @return              Current value of Primary Context Register.
    281  */
    282 static inline uint64_t mmu_primary_context_read(void)
    283 {
    284         return asi_u64_read(ASI_DMMU, VA_PRIMARY_CONTEXT_REG);
    285 }
    286 
    287 /** Write MMU Primary Context Register.
    288  *
    289  * @param v             New value of Primary Context Register.
    290  */
    291 static inline void mmu_primary_context_write(uint64_t v)
    292 {
    293         asi_u64_write(ASI_DMMU, VA_PRIMARY_CONTEXT_REG, v);
    294         flush_pipeline();
    295 }
    296 
    297 /** Read MMU Secondary Context Register.
    298  *
    299  * @return              Current value of Secondary Context Register.
    300  */
    301 static inline uint64_t mmu_secondary_context_read(void)
    302 {
    303         return asi_u64_read(ASI_DMMU, VA_SECONDARY_CONTEXT_REG);
    304 }
    305 
    306 /** Write MMU Primary Context Register.
    307  *
    308  * @param v             New value of Primary Context Register.
    309  */
    310 static inline void mmu_secondary_context_write(uint64_t v)
    311 {
    312         asi_u64_write(ASI_DMMU, VA_SECONDARY_CONTEXT_REG, v);
    313         flush_pipeline();
    314 }
    315 
    316 #if defined (US)
    317 
    318 /** Read IMMU TLB Data Access Register.
    319  *
    320  * @param entry         TLB Entry index.
    321  *
    322  * @return              Current value of specified IMMU TLB Data Access
    323  *                      Register.
    324  */
    325 static inline uint64_t itlb_data_access_read(size_t entry)
    326 {
    327         itlb_data_access_addr_t reg;
    328        
    329         reg.value = 0;
    330         reg.tlb_entry = entry;
    331         return asi_u64_read(ASI_ITLB_DATA_ACCESS_REG, reg.value);
    332 }
    333 
    334 /** Write IMMU TLB Data Access Register.
    335  *
    336  * @param entry         TLB Entry index.
    337  * @param value         Value to be written.
    338  */
    339 static inline void itlb_data_access_write(size_t entry, uint64_t value)
    340 {
    341         itlb_data_access_addr_t reg;
    342        
    343         reg.value = 0;
    344         reg.tlb_entry = entry;
    345         asi_u64_write(ASI_ITLB_DATA_ACCESS_REG, reg.value, value);
    346         flush_pipeline();
    347 }
    348 
    349 /** Read DMMU TLB Data Access Register.
    350  *
    351  * @param entry         TLB Entry index.
    352  *
    353  * @return              Current value of specified DMMU TLB Data Access
    354  *                      Register.
    355  */
    356 static inline uint64_t dtlb_data_access_read(size_t entry)
    357 {
    358         dtlb_data_access_addr_t reg;
    359        
    360         reg.value = 0;
    361         reg.tlb_entry = entry;
    362         return asi_u64_read(ASI_DTLB_DATA_ACCESS_REG, reg.value);
    363 }
    364 
    365 /** Write DMMU TLB Data Access Register.
    366  *
    367  * @param entry         TLB Entry index.
    368  * @param value         Value to be written.
    369  */
    370 static inline void dtlb_data_access_write(size_t entry, uint64_t value)
    371 {
    372         dtlb_data_access_addr_t reg;
    373        
    374         reg.value = 0;
    375         reg.tlb_entry = entry;
    376         asi_u64_write(ASI_DTLB_DATA_ACCESS_REG, reg.value, value);
    377         membar();
    378 }
    379 
    380 /** Read IMMU TLB Tag Read Register.
    381  *
    382  * @param entry         TLB Entry index.
    383  *
    384  * @return              Current value of specified IMMU TLB Tag Read Register.
    385  */
    386 static inline uint64_t itlb_tag_read_read(size_t entry)
    387 {
    388         itlb_tag_read_addr_t tag;
    389 
    390         tag.value = 0;
    391         tag.tlb_entry = entry;
    392         return asi_u64_read(ASI_ITLB_TAG_READ_REG, tag.value);
    393 }
    394 
    395 /** Read DMMU TLB Tag Read Register.
    396  *
    397  * @param entry         TLB Entry index.
    398  *
    399  * @return              Current value of specified DMMU TLB Tag Read Register.
    400  */
    401 static inline uint64_t dtlb_tag_read_read(size_t entry)
    402 {
    403         dtlb_tag_read_addr_t tag;
    404 
    405         tag.value = 0;
    406         tag.tlb_entry = entry;
    407         return asi_u64_read(ASI_DTLB_TAG_READ_REG, tag.value);
    408 }
    409 
    410 #elif defined (US3)
    411 
    412 
    413 /** Read IMMU TLB Data Access Register.
    414  *
    415  * @param tlb           TLB number (one of TLB_ISMALL or TLB_IBIG)
    416  * @param entry         TLB Entry index.
    417  *
    418  * @return              Current value of specified IMMU TLB Data Access
    419  *                      Register.
    420  */
    421 static inline uint64_t itlb_data_access_read(int tlb, size_t entry)
    422 {
    423         itlb_data_access_addr_t reg;
    424        
    425         reg.value = 0;
    426         reg.tlb_number = tlb;
    427         reg.local_tlb_entry = entry;
    428         return asi_u64_read(ASI_ITLB_DATA_ACCESS_REG, reg.value);
    429 }
    430 
    431 /** Write IMMU TLB Data Access Register.
    432  * @param tlb           TLB number (one of TLB_ISMALL or TLB_IBIG)
    433  * @param entry         TLB Entry index.
    434  * @param value         Value to be written.
    435  */
    436 static inline void itlb_data_access_write(int tlb, size_t entry,
    437         uint64_t value)
    438 {
    439         itlb_data_access_addr_t reg;
    440        
    441         reg.value = 0;
    442         reg.tlb_number = tlb;
    443         reg.local_tlb_entry = entry;
    444         asi_u64_write(ASI_ITLB_DATA_ACCESS_REG, reg.value, value);
    445         flush_pipeline();
    446 }
    447 
    448 /** Read DMMU TLB Data Access Register.
    449  *
    450  * @param tlb           TLB number (one of TLB_DSMALL, TLB_DBIG, TLB_DBIG)
    451  * @param entry         TLB Entry index.
    452  *
    453  * @return              Current value of specified DMMU TLB Data Access
    454  *                      Register.
    455  */
    456 static inline uint64_t dtlb_data_access_read(int tlb, size_t entry)
    457 {
    458         dtlb_data_access_addr_t reg;
    459        
    460         reg.value = 0;
    461         reg.tlb_number = tlb;
    462         reg.local_tlb_entry = entry;
    463         return asi_u64_read(ASI_DTLB_DATA_ACCESS_REG, reg.value);
    464 }
    465 
    466 /** Write DMMU TLB Data Access Register.
    467  *
    468  * @param tlb           TLB number (one of TLB_DSMALL, TLB_DBIG_0, TLB_DBIG_1) 
    469  * @param entry         TLB Entry index.
    470  * @param value         Value to be written.
    471  */
    472 static inline void dtlb_data_access_write(int tlb, size_t entry,
    473         uint64_t value)
    474 {
    475         dtlb_data_access_addr_t reg;
    476        
    477         reg.value = 0;
    478         reg.tlb_number = tlb;
    479         reg.local_tlb_entry = entry;
    480         asi_u64_write(ASI_DTLB_DATA_ACCESS_REG, reg.value, value);
    481         membar();
    482 }
    483 
    484 /** Read IMMU TLB Tag Read Register.
    485  *
    486  * @param tlb           TLB number (one of TLB_ISMALL or TLB_IBIG)
    487  * @param entry         TLB Entry index.
    488  *
    489  * @return              Current value of specified IMMU TLB Tag Read Register.
    490  */
    491 static inline uint64_t itlb_tag_read_read(int tlb, size_t entry)
    492 {
    493         itlb_tag_read_addr_t tag;
    494 
    495         tag.value = 0;
    496         tag.tlb_number = tlb;
    497         tag.local_tlb_entry = entry;
    498         return asi_u64_read(ASI_ITLB_TAG_READ_REG, tag.value);
    499 }
    500 
    501 /** Read DMMU TLB Tag Read Register.
    502  *
    503  * @param tlb           TLB number (one of TLB_DSMALL, TLB_DBIG_0, TLB_DBIG_1)
    504  * @param entry         TLB Entry index.
    505  *
    506  * @return              Current value of specified DMMU TLB Tag Read Register.
    507  */
    508 static inline uint64_t dtlb_tag_read_read(int tlb, size_t entry)
    509 {
    510         dtlb_tag_read_addr_t tag;
    511 
    512         tag.value = 0;
    513         tag.tlb_number = tlb;
    514         tag.local_tlb_entry = entry;
    515         return asi_u64_read(ASI_DTLB_TAG_READ_REG, tag.value);
    516 }
    517 
    518 #endif
    519 
    520 
    521 /** Write IMMU TLB Tag Access Register.
    522  *
    523  * @param v             Value to be written.
    524  */
    525 static inline void itlb_tag_access_write(uint64_t v)
    526 {
    527         asi_u64_write(ASI_IMMU, VA_IMMU_TAG_ACCESS, v);
    528         flush_pipeline();
    529 }
    530 
    531 /** Read IMMU TLB Tag Access Register.
    532  *
    533  * @return              Current value of IMMU TLB Tag Access Register.
    534  */
    535 static inline uint64_t itlb_tag_access_read(void)
    536 {
    537         return asi_u64_read(ASI_IMMU, VA_IMMU_TAG_ACCESS);
    538 }
    539 
    540 /** Write DMMU TLB Tag Access Register.
    541  *
    542  * @param v             Value to be written.
    543  */
    544 static inline void dtlb_tag_access_write(uint64_t v)
    545 {
    546         asi_u64_write(ASI_DMMU, VA_DMMU_TAG_ACCESS, v);
    547         membar();
    548 }
    549 
    550 /** Read DMMU TLB Tag Access Register.
    551  *
    552  * @return              Current value of DMMU TLB Tag Access Register.
    553  */
    554 static inline uint64_t dtlb_tag_access_read(void)
    555 {
    556         return asi_u64_read(ASI_DMMU, VA_DMMU_TAG_ACCESS);
    557 }
    558 
    559 
    560 /** Write IMMU TLB Data in Register.
    561  *
    562  * @param v             Value to be written.
    563  */
    564 static inline void itlb_data_in_write(uint64_t v)
    565 {
    566         asi_u64_write(ASI_ITLB_DATA_IN_REG, 0, v);
    567         flush_pipeline();
    568 }
    569 
    570 /** Write DMMU TLB Data in Register.
    571  *
    572  * @param v             Value to be written.
    573  */
    574 static inline void dtlb_data_in_write(uint64_t v)
    575 {
    576         asi_u64_write(ASI_DTLB_DATA_IN_REG, 0, v);
    577         membar();
    578 }
    579 
    580 /** Read ITLB Synchronous Fault Status Register.
    581  *
    582  * @return              Current content of I-SFSR register.
    583  */
    584 static inline uint64_t itlb_sfsr_read(void)
    585 {
    586         return asi_u64_read(ASI_IMMU, VA_IMMU_SFSR);
    587 }
    588 
    589 /** Write ITLB Synchronous Fault Status Register.
    590  *
    591  * @param v             New value of I-SFSR register.
    592  */
    593 static inline void itlb_sfsr_write(uint64_t v)
    594 {
    595         asi_u64_write(ASI_IMMU, VA_IMMU_SFSR, v);
    596         flush_pipeline();
    597 }
    598 
    599 /** Read DTLB Synchronous Fault Status Register.
    600  *
    601  * @return              Current content of D-SFSR register.
    602  */
    603 static inline uint64_t dtlb_sfsr_read(void)
    604 {
    605         return asi_u64_read(ASI_DMMU, VA_DMMU_SFSR);
    606 }
    607 
    608 /** Write DTLB Synchronous Fault Status Register.
    609  *
    610  * @param v             New value of D-SFSR register.
    611  */
    612 static inline void dtlb_sfsr_write(uint64_t v)
    613 {
    614         asi_u64_write(ASI_DMMU, VA_DMMU_SFSR, v);
    615         membar();
    616 }
    617 
    618 /** Read DTLB Synchronous Fault Address Register.
    619  *
    620  * @return              Current content of D-SFAR register.
    621  */
    622 static inline uint64_t dtlb_sfar_read(void)
    623 {
    624         return asi_u64_read(ASI_DMMU, VA_DMMU_SFAR);
    625 }
    626 
    627 /** Perform IMMU TLB Demap Operation.
    628  *
    629  * @param type          Selects between context and page demap (and entire MMU
    630  *                      demap on US3).
    631  * @param context_encoding Specifies which Context register has Context ID for
    632  *                      demap.
    633  * @param page          Address which is on the page to be demapped.
    634  */
    635 static inline void itlb_demap(int type, int context_encoding, uintptr_t page)
    636 {
    637         tlb_demap_addr_t da;
    638         page_address_t pg;
    639        
    640         da.value = 0;
    641         pg.address = page;
    642        
    643         da.type = type;
    644         da.context = context_encoding;
    645         da.vpn = pg.vpn;
    646        
    647         /* da.value is the address within the ASI */
    648         asi_u64_write(ASI_IMMU_DEMAP, da.value, 0);
    649 
    650         flush_pipeline();
    651 }
    652 
    653 /** Perform DMMU TLB Demap Operation.
    654  *
    655  * @param type          Selects between context and page demap (and entire MMU
    656  *                      demap on US3).
    657  * @param context_encoding Specifies which Context register has Context ID for
    658  *                      demap.
    659  * @param page          Address which is on the page to be demapped.
    660  */
    661 static inline void dtlb_demap(int type, int context_encoding, uintptr_t page)
    662 {
    663         tlb_demap_addr_t da;
    664         page_address_t pg;
    665        
    666         da.value = 0;
    667         pg.address = page;
    668        
    669         da.type = type;
    670         da.context = context_encoding;
    671         da.vpn = pg.vpn;
    672        
    673         /* da.value is the address within the ASI */
    674         asi_u64_write(ASI_DMMU_DEMAP, da.value, 0);
    675 
    676         membar();
    677 }
    678 
    679 extern void fast_instruction_access_mmu_miss(unative_t, istate_t *);
    680 extern void fast_data_access_mmu_miss(tlb_tag_access_reg_t, istate_t *);
    681 extern void fast_data_access_protection(tlb_tag_access_reg_t , istate_t *);
    682 
    683 extern void dtlb_insert_mapping(uintptr_t, uintptr_t, int, bool, bool);
    684 
    685 extern void dump_sfsr_and_sfar(void);
    686 
    687 #endif /* !def __ASM__ */
    68844
    68945#endif
Note: See TracChangeset for help on using the changeset viewer.