WebSVN – HelenOS – Diff – /trunk/kernel/arch/sparc64/include/mm/tlb.h

  */
 #ifndef KERN_sparc64_TLB_H_
 #define KERN_sparc64_TLB_H_
+#if defined (US)
 #define ITLB_ENTRY_COUNT        64
 #define DTLB_ENTRY_COUNT        64
+#define DTLB_MAX_LOCKED_ENTRIES     DTLB_ENTRY_COUNT
+#endif
+/** TLB_DSMALL is the only of the three DMMUs that can hold locked entries. */
+#if defined (US3)
+#define DTLB_MAX_LOCKED_ENTRIES     16
+#endif
 #define MEM_CONTEXT_KERNEL      0
 #define MEM_CONTEXT_TEMP        1
 /** Page sizes. */
 #define KERNEL_PAGE_WIDTH       22  /* 4M */
 /* TLB Demap Operation types. */
 #define TLB_DEMAP_PAGE      0
 #define TLB_DEMAP_CONTEXT   1
+#if defined (US3)
+#define TLB_DEMAP_ALL       2
+#endif
 #define TLB_DEMAP_TYPE_SHIFT    6
 /* TLB Demap Operation Context register encodings. */
 #define TLB_DEMAP_PRIMARY   0
 #define TLB_DEMAP_SECONDARY 1
 #define TLB_DEMAP_NUCLEUS   2
+/* There are more TLBs in one MMU in US3, their codes are defined here. */
+#if defined (US3)
+/* D-MMU: one small (16-entry) TLB and two big (512-entry) TLBs */
+#define TLB_DSMALL  0
+#define TLB_DBIG_0  2
+#define TLB_DBIG_1  3
+/* I-MMU: one small (16-entry) TLB and one big TLB */
+#define TLB_ISMALL  0
+#define TLB_IBIG    2
+#endif
 #define TLB_DEMAP_CONTEXT_SHIFT 4
 /* TLB Tag Access shifts */
 #define TLB_TAG_ACCESS_CONTEXT_SHIFT    0
 #define TLB_TAG_ACCESS_CONTEXT_MASK ((1 << 13) - 1)
 #include <arch/mm/mmu.h>
 #include <arch/mm/page.h>
 #include <arch/asm.h>
 #include <arch/barrier.h>
 #include <arch/types.h>
+#include <arch/register.h>
+#include <arch/cpu.h>
 union tlb_context_reg {
     uint64_t v;
     struct {
         unsigned long : 51;
 /** I-/D-TLB Data In/Access Register type. */
 typedef tte_data_t tlb_data_t;
 /** I-/D-TLB Data Access Address in Alternate Space. */
+#if defined (US)
 union tlb_data_access_addr {
     uint64_t value;
     struct {
         uint64_t : 55;
         unsigned tlb_entry : 6;
         unsigned : 3;
     } __attribute__ ((packed));
 };
-typedef union tlb_data_access_addr tlb_data_access_addr_t;
+typedef union tlb_data_access_addr dtlb_data_access_addr_t;
+typedef union tlb_data_access_addr dtlb_tag_read_addr_t;
+typedef union tlb_data_access_addr itlb_data_access_addr_t;
-typedef union tlb_data_access_addr tlb_tag_read_addr_t;
+typedef union tlb_data_access_addr itlb_tag_read_addr_t;
+#elif defined (US3)
+/*
+ * In US3, I-MMU and D-MMU have different formats of the data
+ * access register virtual address. In the corresponding
+ * structures the member variable for the entry number is
+ * called "local_tlb_entry" - it contrasts with the "tlb_entry"
+ * for the US data access register VA structure. The rationale
+ * behind this is to prevent careless mistakes in the code
+ * caused by setting only the entry number and not the TLB
+ * number in the US3 code (when taking the code from US).
+ */
+union dtlb_data_access_addr {
+    uint64_t value;
+    struct {
+        uint64_t : 45;
+        unsigned : 1;
+        unsigned tlb_number : 2;
+        unsigned : 4;
+        unsigned local_tlb_entry : 9;
+        unsigned : 3;
+    } __attribute__ ((packed));
+};
+typedef union dtlb_data_access_addr dtlb_data_access_addr_t;
+typedef union dtlb_data_access_addr dtlb_tag_read_addr_t;
+union itlb_data_access_addr {
+    uint64_t value;
+    struct {
+        uint64_t : 45;
+        unsigned : 1;
+        unsigned tlb_number : 2;
+        unsigned : 6;
+        unsigned local_tlb_entry : 7;
+        unsigned : 3;
+    } __attribute__ ((packed));
+};
+typedef union itlb_data_access_addr itlb_data_access_addr_t;
+typedef union itlb_data_access_addr itlb_tag_read_addr_t;
+#endif
 /** I-/D-TLB Tag Read Register. */
 union tlb_tag_read_reg {
     uint64_t value;
     struct {
 /** TLB Demap Operation Address. */
 union tlb_demap_addr {
     uint64_t value;
     struct {
         uint64_t vpn: 51;   /**< Virtual Address bits 63:13. */
+#if defined (US)
         unsigned : 6;       /**< Ignored. */
         unsigned type : 1;  /**< The type of demap operation. */
+#elif defined (US3)
+        unsigned : 5;       /**< Ignored. */
+        unsigned type: 2;   /**< The type of demap operation. */
+#endif
         unsigned context : 2;   /**< Context register selection. */
         unsigned : 4;       /**< Zero. */
     } __attribute__ ((packed));
 };
 typedef union tlb_demap_addr tlb_demap_addr_t;
 /** TLB Synchronous Fault Status Register. */
 union tlb_sfsr_reg {
     uint64_t value;
     struct {
+#if defined (US)
         unsigned long : 40; /**< Implementation dependent. */
         unsigned asi : 8;   /**< ASI. */
         unsigned : 2;
         unsigned ft : 7;    /**< Fault type. */
+#elif defined (US3)
+        unsigned long : 39; /**< Implementation dependent. */
+        unsigned nf : 1;    /**< Non-faulting load. */
+        unsigned asi : 8;   /**< ASI. */
+        unsigned tm : 1;    /**< I-TLB miss. */
+        unsigned : 3;       /**< Reserved. */
+        unsigned ft : 5;    /**< Fault type. */
+#endif
         unsigned e : 1;     /**< Side-effect bit. */
         unsigned ct : 2;    /**< Context Register selection. */
         unsigned pr : 1;    /**< Privilege bit. */
         unsigned w : 1;     /**< Write bit. */
         unsigned ow : 1;    /**< Overwrite bit. */
         unsigned fv : 1;    /**< Fault Valid bit. */
     } __attribute__ ((packed));
 };
 typedef union tlb_sfsr_reg tlb_sfsr_reg_t;
+#if defined (US3)
+/*
+ * Functions for determining the number of entries in TLBs. They either return
+ * a constant value or a value based on the CPU autodetection.
+ */
+/**
+ * Determine the number of entries in the DMMU's small TLB.
+ */
+static inline uint16_t tlb_dsmall_size(void)
+{
+    return 16;
+}
+/**
+ * Determine the number of entries in each DMMU's big TLB.
+ */
+static inline uint16_t tlb_dbig_size(void)
+{
+    return 512;
+}
+/**
+ * Determine the number of entries in the IMMU's small TLB.
+ */
+static inline uint16_t tlb_ismall_size(void)
+{
+    return 16;
+}
+/**
+ * Determine the number of entries in the IMMU's big TLB.
+ */
+static inline uint16_t tlb_ibig_size(void)
+{
+    if (((ver_reg_t) ver_read()).impl == IMPL_ULTRASPARCIV_PLUS)
+        return 512;
+    else
+        return 128;
+}
+#endif
 /** Read MMU Primary Context Register.
+ *
- * @return Current value of Primary Context Register.
+ * @return      Current value of Primary Context Register.
  */
 static inline uint64_t mmu_primary_context_read(void)
+{
     return asi_u64_read(ASI_DMMU, VA_PRIMARY_CONTEXT_REG);
+}
 /** Write MMU Primary Context Register.
+ *
- * @param v New value of Primary Context Register.
+ * @param v     New value of Primary Context Register.
  */
 static inline void mmu_primary_context_write(uint64_t v)
+{
     asi_u64_write(ASI_DMMU, VA_PRIMARY_CONTEXT_REG, v);
     flush_pipeline();
+}
 /** Read MMU Secondary Context Register.
+ *
- * @return Current value of Secondary Context Register.
+ * @return      Current value of Secondary Context Register.
  */
 static inline uint64_t mmu_secondary_context_read(void)
+{
     return asi_u64_read(ASI_DMMU, VA_SECONDARY_CONTEXT_REG);
+}
 /** Write MMU Primary Context Register.
+ *
- * @param v New value of Primary Context Register.
+ * @param v     New value of Primary Context Register.
  */
 static inline void mmu_secondary_context_write(uint64_t v)
+{
     asi_u64_write(ASI_DMMU, VA_SECONDARY_CONTEXT_REG, v);
     flush_pipeline();
+}
+#if defined (US)
 /** Read IMMU TLB Data Access Register.
+ *
- * @param entry TLB Entry index.
+ * @param entry     TLB Entry index.
+ *
- * @return Current value of specified IMMU TLB Data Access Register.
+ * @return      Current value of specified IMMU TLB Data Access
+ *          Register.
  */
 static inline uint64_t itlb_data_access_read(index_t entry)
+{
-    tlb_data_access_addr_t reg;
+    itlb_data_access_addr_t reg;
     reg.value = 0;
     reg.tlb_entry = entry;
     return asi_u64_read(ASI_ITLB_DATA_ACCESS_REG, reg.value);
+}
 /** Write IMMU TLB Data Access Register.
+ *
- * @param entry TLB Entry index.
+ * @param entry     TLB Entry index.
- * @param value Value to be written.
+ * @param value     Value to be written.
  */
 static inline void itlb_data_access_write(index_t entry, uint64_t value)
+{
-    tlb_data_access_addr_t reg;
+    itlb_data_access_addr_t reg;
     reg.value = 0;
     reg.tlb_entry = entry;
     asi_u64_write(ASI_ITLB_DATA_ACCESS_REG, reg.value, value);
     flush_pipeline();
+}
 /** Read DMMU TLB Data Access Register.
+ *
- * @param entry TLB Entry index.
+ * @param entry     TLB Entry index.
+ *
- * @return Current value of specified DMMU TLB Data Access Register.
+ * @return      Current value of specified DMMU TLB Data Access
+ *          Register.
  */
 static inline uint64_t dtlb_data_access_read(index_t entry)
+{
-    tlb_data_access_addr_t reg;
+    dtlb_data_access_addr_t reg;
     reg.value = 0;
     reg.tlb_entry = entry;
     return asi_u64_read(ASI_DTLB_DATA_ACCESS_REG, reg.value);
+}
 /** Write DMMU TLB Data Access Register.
+ *
- * @param entry TLB Entry index.
+ * @param entry     TLB Entry index.
- * @param value Value to be written.
+ * @param value     Value to be written.
  */
 static inline void dtlb_data_access_write(index_t entry, uint64_t value)
+{
-    tlb_data_access_addr_t reg;
+    dtlb_data_access_addr_t reg;
     reg.value = 0;
     reg.tlb_entry = entry;
     asi_u64_write(ASI_DTLB_DATA_ACCESS_REG, reg.value, value);
     membar();
+}
 /** Read IMMU TLB Tag Read Register.
+ *
- * @param entry TLB Entry index.
+ * @param entry     TLB Entry index.
+ *
- * @return Current value of specified IMMU TLB Tag Read Register.
+ * @return      Current value of specified IMMU TLB Tag Read Register.
  */
 static inline uint64_t itlb_tag_read_read(index_t entry)
+{
-    tlb_tag_read_addr_t tag;
+    itlb_tag_read_addr_t tag;
     tag.value = 0;
     tag.tlb_entry = entry;
     return asi_u64_read(ASI_ITLB_TAG_READ_REG, tag.value);
+}
 /** Read DMMU TLB Tag Read Register.
+ *
- * @param entry TLB Entry index.
+ * @param entry     TLB Entry index.
+ *
- * @return Current value of specified DMMU TLB Tag Read Register.
+ * @return      Current value of specified DMMU TLB Tag Read Register.
  */
 static inline uint64_t dtlb_tag_read_read(index_t entry)
+{
-    tlb_tag_read_addr_t tag;
+    dtlb_tag_read_addr_t tag;
     tag.value = 0;
     tag.tlb_entry = entry;
     return asi_u64_read(ASI_DTLB_TAG_READ_REG, tag.value);
+}
+#elif defined (US3)
+/** Read IMMU TLB Data Access Register.
+ *
+ * @param tlb       TLB number (one of TLB_ISMALL or TLB_IBIG)
+ * @param entry     TLB Entry index.
+ *
+ * @return      Current value of specified IMMU TLB Data Access
+ *          Register.
+ */
+static inline uint64_t itlb_data_access_read(int tlb, index_t entry)
+{
+    itlb_data_access_addr_t reg;
+    reg.value = 0;
+    reg.tlb_number = tlb;
+    reg.local_tlb_entry = entry;
+    return asi_u64_read(ASI_ITLB_DATA_ACCESS_REG, reg.value);
+}
+/** Write IMMU TLB Data Access Register.
+ * @param tlb       TLB number (one of TLB_ISMALL or TLB_IBIG)
+ * @param entry     TLB Entry index.
+ * @param value     Value to be written.
+ */
+static inline void itlb_data_access_write(int tlb, index_t entry,
+    uint64_t value)
+{
+    itlb_data_access_addr_t reg;
+    reg.value = 0;
+    reg.tlb_number = tlb;
+    reg.local_tlb_entry = entry;
+    asi_u64_write(ASI_ITLB_DATA_ACCESS_REG, reg.value, value);
+    flush_pipeline();
+}
+/** Read DMMU TLB Data Access Register.
+ *
+ * @param tlb       TLB number (one of TLB_DSMALL, TLB_DBIG, TLB_DBIG)
+ * @param entry     TLB Entry index.
+ *
+ * @return      Current value of specified DMMU TLB Data Access
+ *          Register.
+ */
+static inline uint64_t dtlb_data_access_read(int tlb, index_t entry)
+{
+    dtlb_data_access_addr_t reg;
+    reg.value = 0;
+    reg.tlb_number = tlb;
+    reg.local_tlb_entry = entry;
+    return asi_u64_read(ASI_DTLB_DATA_ACCESS_REG, reg.value);
+}
+/** Write DMMU TLB Data Access Register.
+ *
+ * @param tlb       TLB number (one of TLB_DSMALL, TLB_DBIG_0, TLB_DBIG_1)
+ * @param entry     TLB Entry index.
+ * @param value     Value to be written.
+ */
+static inline void dtlb_data_access_write(int tlb, index_t entry,
+    uint64_t value)
+{
+    dtlb_data_access_addr_t reg;
+    reg.value = 0;
+    reg.tlb_number = tlb;
+    reg.local_tlb_entry = entry;
+    asi_u64_write(ASI_DTLB_DATA_ACCESS_REG, reg.value, value);
+    membar();
+}
+/** Read IMMU TLB Tag Read Register.
+ *
+ * @param tlb       TLB number (one of TLB_ISMALL or TLB_IBIG)
+ * @param entry     TLB Entry index.
+ *
+ * @return      Current value of specified IMMU TLB Tag Read Register.
+ */
+static inline uint64_t itlb_tag_read_read(int tlb, index_t entry)
+{
+    itlb_tag_read_addr_t tag;
+    tag.value = 0;
+    tag.tlb_number = tlb;
+    tag.local_tlb_entry = entry;
+    return asi_u64_read(ASI_ITLB_TAG_READ_REG, tag.value);
+}
+/** Read DMMU TLB Tag Read Register.
+ *
+ * @param tlb       TLB number (one of TLB_DSMALL, TLB_DBIG_0, TLB_DBIG_1)
+ * @param entry     TLB Entry index.
+ *
+ * @return      Current value of specified DMMU TLB Tag Read Register.
+ */
+static inline uint64_t dtlb_tag_read_read(int tlb, index_t entry)
+{
+    dtlb_tag_read_addr_t tag;
+    tag.value = 0;
+    tag.tlb_number = tlb;
+    tag.local_tlb_entry = entry;
+    return asi_u64_read(ASI_DTLB_TAG_READ_REG, tag.value);
+}
+#endif
 /** Write IMMU TLB Tag Access Register.
+ *
- * @param v Value to be written.
+ * @param v     Value to be written.
  */
 static inline void itlb_tag_access_write(uint64_t v)
+{
     asi_u64_write(ASI_IMMU, VA_IMMU_TAG_ACCESS, v);
     flush_pipeline();
+}
 /** Read IMMU TLB Tag Access Register.
+ *
- * @return Current value of IMMU TLB Tag Access Register.
+ * @return      Current value of IMMU TLB Tag Access Register.
  */
 static inline uint64_t itlb_tag_access_read(void)
+{
     return asi_u64_read(ASI_IMMU, VA_IMMU_TAG_ACCESS);
+}
 /** Write DMMU TLB Tag Access Register.
+ *
- * @param v Value to be written.
+ * @param v     Value to be written.
  */
 static inline void dtlb_tag_access_write(uint64_t v)
+{
     asi_u64_write(ASI_DMMU, VA_DMMU_TAG_ACCESS, v);
     membar();
+}
 /** Read DMMU TLB Tag Access Register.
+ *
- * @return Current value of DMMU TLB Tag Access Register.
+ * @return      Current value of DMMU TLB Tag Access Register.
  */
 static inline uint64_t dtlb_tag_access_read(void)
+{
     return asi_u64_read(ASI_DMMU, VA_DMMU_TAG_ACCESS);
+}
 /** Write IMMU TLB Data in Register.
+ *
- * @param v Value to be written.
+ * @param v     Value to be written.
  */
 static inline void itlb_data_in_write(uint64_t v)
+{
     asi_u64_write(ASI_ITLB_DATA_IN_REG, 0, v);
     flush_pipeline();
+}
 /** Write DMMU TLB Data in Register.
+ *
- * @param v Value to be written.
+ * @param v     Value to be written.
  */
 static inline void dtlb_data_in_write(uint64_t v)
+{
     asi_u64_write(ASI_DTLB_DATA_IN_REG, 0, v);
     membar();
+}
 /** Read ITLB Synchronous Fault Status Register.
+ *
- * @return Current content of I-SFSR register.
+ * @return      Current content of I-SFSR register.
  */
 static inline uint64_t itlb_sfsr_read(void)
+{
     return asi_u64_read(ASI_IMMU, VA_IMMU_SFSR);
+}
 /** Write ITLB Synchronous Fault Status Register.
+ *
- * @param v New value of I-SFSR register.
+ * @param v     New value of I-SFSR register.
  */
 static inline void itlb_sfsr_write(uint64_t v)
+{
     asi_u64_write(ASI_IMMU, VA_IMMU_SFSR, v);
     flush_pipeline();
+}
 /** Read DTLB Synchronous Fault Status Register.
+ *
- * @return Current content of D-SFSR register.
+ * @return      Current content of D-SFSR register.
  */
 static inline uint64_t dtlb_sfsr_read(void)
+{
     return asi_u64_read(ASI_DMMU, VA_DMMU_SFSR);
+}
 /** Write DTLB Synchronous Fault Status Register.
+ *
- * @param v New value of D-SFSR register.
+ * @param v     New value of D-SFSR register.
  */
 static inline void dtlb_sfsr_write(uint64_t v)
+{
     asi_u64_write(ASI_DMMU, VA_DMMU_SFSR, v);
     membar();
+}
 /** Read DTLB Synchronous Fault Address Register.
+ *
- * @return Current content of D-SFAR register.
+ * @return      Current content of D-SFAR register.
  */
 static inline uint64_t dtlb_sfar_read(void)
+{
     return asi_u64_read(ASI_DMMU, VA_DMMU_SFAR);
+}
 /** Perform IMMU TLB Demap Operation.
+ *
- * @param type Selects between context and page demap.
+ * @param type      Selects between context and page demap (and entire MMU
+ *          demap on US3).
  * @param context_encoding Specifies which Context register has Context ID for
- *  demap.
+ *          demap.
- * @param page Address which is on the page to be demapped.
+ * @param page      Address which is on the page to be demapped.
  */
 static inline void itlb_demap(int type, int context_encoding, uintptr_t page)
+{
     tlb_demap_addr_t da;
     page_address_t pg;
     da.type = type;
     da.context = context_encoding;
     da.vpn = pg.vpn;
-    asi_u64_write(ASI_IMMU_DEMAP, da.value, 0); /* da.value is the
-                             * address within the
+    /* da.value is the address within the ASI */
-                             * ASI */
+    asi_u64_write(ASI_IMMU_DEMAP, da.value, 0);
     flush_pipeline();
+}
 /** Perform DMMU TLB Demap Operation.
+ *
- * @param type Selects between context and page demap.
+ * @param type      Selects between context and page demap (and entire MMU
+ *          demap on US3).
  * @param context_encoding Specifies which Context register has Context ID for
- *   demap.
+ *          demap.
- * @param page Address which is on the page to be demapped.
+ * @param page      Address which is on the page to be demapped.
  */
 static inline void dtlb_demap(int type, int context_encoding, uintptr_t page)
+{
     tlb_demap_addr_t da;
     page_address_t pg;
     da.type = type;
     da.context = context_encoding;
     da.vpn = pg.vpn;
-    asi_u64_write(ASI_DMMU_DEMAP, da.value, 0); /* da.value is the
-                             * address within the
+    /* da.value is the address within the ASI */
-                             * ASI */
+    asi_u64_write(ASI_DMMU_DEMAP, da.value, 0);
     membar();
+}
-extern void fast_instruction_access_mmu_miss(unative_t unused, istate_t *istate);
+extern void fast_instruction_access_mmu_miss(unative_t, istate_t *);
-extern void fast_data_access_mmu_miss(tlb_tag_access_reg_t tag, istate_t *istate);
+extern void fast_data_access_mmu_miss(tlb_tag_access_reg_t, istate_t *);
-extern void fast_data_access_protection(tlb_tag_access_reg_t tag , istate_t *istate);
+extern void fast_data_access_protection(tlb_tag_access_reg_t , istate_t *);
-extern void dtlb_insert_mapping(uintptr_t page, uintptr_t frame, int pagesize, bool locked, bool cacheable);
+extern void dtlb_insert_mapping(uintptr_t, uintptr_t, int, bool, bool);
 extern void dump_sfsr_and_sfar(void);
 #endif /* !def __ASM__ */

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(root)/trunk/kernel/arch/sparc64/include/mm/tlb.h – Rev 3145 → 3672