arch/sparc/include/asm/swift.h

   1 /* swift.h: Specific definitions for the _broken_ Swift SRMMU
   2  *          MMU module.
   3  *
   4  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6
   7 #ifndef _SPARC_SWIFT_H
   8 #define _SPARC_SWIFT_H
   9
  10 /* Swift is so brain damaged, here is the mmu control register. */
  11 #define SWIFT_ST       0x00800000   /* SW tablewalk enable */
  12 #define SWIFT_WP       0x00400000   /* Watchpoint enable   */
  13
  14 /* Branch folding (buggy, disable on production systems!)  */
  15 #define SWIFT_BF       0x00200000
  16 #define SWIFT_PMC      0x00180000   /* Page mode control   */
  17 #define SWIFT_PE       0x00040000   /* Parity enable       */
  18 #define SWIFT_PC       0x00020000   /* Parity control      */
  19 #define SWIFT_AP       0x00010000   /* Graphics page mode control (TCX/SX) */
  20 #define SWIFT_AC       0x00008000   /* Alternate Cacheability (see viking.h) */
  21 #define SWIFT_BM       0x00004000   /* Boot mode */
  22 #define SWIFT_RC       0x00003c00   /* DRAM refresh control */
  23 #define SWIFT_IE       0x00000200   /* Instruction cache enable */
  24 #define SWIFT_DE       0x00000100   /* Data cache enable */
  25 #define SWIFT_SA       0x00000080   /* Store Allocate */
  26 #define SWIFT_NF       0x00000002   /* No fault mode */
  27 #define SWIFT_EN       0x00000001   /* MMU enable */
  28
  29 /* Bits [13:5] select one of 512 instruction cache tags */
  30 static inline void swift_inv_insn_tag(unsigned long addr)
  31 {
  32         __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
  33                              : /* no outputs */
  34                              : "r" (addr), "i" (ASI_M_TXTC_TAG)
  35                              : "memory");
  36 }
  37
  38 /* Bits [12:4] select one of 512 data cache tags */
  39 static inline void swift_inv_data_tag(unsigned long addr)
  40 {
  41         __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
  42                              : /* no outputs */
  43                              : "r" (addr), "i" (ASI_M_DATAC_TAG)
  44                              : "memory");
  45 }
  46
  47 static inline void swift_flush_dcache(void)
  48 {
  49         unsigned long addr;
  50
  51         for (addr = 0; addr < 0x2000; addr += 0x10)
  52                 swift_inv_data_tag(addr);
  53 }
  54
  55 static inline void swift_flush_icache(void)
  56 {
  57         unsigned long addr;
  58
  59         for (addr = 0; addr < 0x4000; addr += 0x20)
  60                 swift_inv_insn_tag(addr);
  61 }
  62
  63 static inline void swift_idflash_clear(void)
  64 {
  65         unsigned long addr;
  66
  67         for (addr = 0; addr < 0x2000; addr += 0x10) {
  68                 swift_inv_insn_tag(addr<<1);
  69                 swift_inv_data_tag(addr);
  70         }
  71 }
  72
  73 /* Swift is so broken, it isn't even safe to use the following. */
  74 static inline void swift_flush_page(unsigned long page)
  75 {
  76         __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
  77                              : /* no outputs */
  78                              : "r" (page), "i" (ASI_M_FLUSH_PAGE)
  79                              : "memory");
  80 }
  81
  82 static inline void swift_flush_segment(unsigned long addr)
  83 {
  84         __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
  85                              : /* no outputs */
  86                              : "r" (addr), "i" (ASI_M_FLUSH_SEG)
  87                              : "memory");
  88 }
  89
  90 static inline void swift_flush_region(unsigned long addr)
  91 {
  92         __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
  93                              : /* no outputs */
  94                              : "r" (addr), "i" (ASI_M_FLUSH_REGION)
  95                              : "memory");
  96 }
  97
  98 static inline void swift_flush_context(void)
  99 {
 100         __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"
 101                              : /* no outputs */
 102                              : "i" (ASI_M_FLUSH_CTX)
 103                              : "memory");
 104 }
 105
 106 #endif /* !(_SPARC_SWIFT_H) */