include/asm-sparc/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 extern __inline__ void swift_inv_insn_tag(unsigned long addr)
  31 {
  32         __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
  33                              "r" (addr), "i" (ASI_M_TXTC_TAG));
  34 }
  35
  36 /* Bits [12:4] select one of 512 data cache tags */
  37 extern __inline__ void swift_inv_data_tag(unsigned long addr)
  38 {
  39         __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
  40                              "r" (addr), "i" (ASI_M_DATAC_TAG));
  41 }
  42
  43 extern __inline__ void swift_flush_dcache(void)
  44 {
  45         unsigned long addr;
  46
  47         for(addr = 0; addr < 0x2000; addr += 0x10)
  48                 swift_inv_data_tag(addr);
  49 }
  50
  51 extern __inline__ void swift_flush_icache(void)
  52 {
  53         unsigned long addr;
  54
  55         for(addr = 0; addr < 0x4000; addr += 0x20)
  56                 swift_inv_insn_tag(addr);
  57 }
  58
  59 extern __inline__ void swift_idflash_clear(void)
  60 {
  61         unsigned long addr;
  62
  63         for(addr = 0; addr < 0x2000; addr += 0x10) {
  64                 swift_inv_insn_tag(addr<<1);
  65                 swift_inv_data_tag(addr);
  66         }
  67 }
  68
  69 /* Swift is so broken, it isn't even safe to use the following. */
  70 extern __inline__ void swift_flush_page(unsigned long page)
  71 {
  72         __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
  73                              "r" (page), "i" (ASI_M_FLUSH_PAGE));
  74 }
  75
  76 extern __inline__ void swift_flush_segment(unsigned long addr)
  77 {
  78         __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
  79                              "r" (addr), "i" (ASI_M_FLUSH_SEG));
  80 }
  81
  82 extern __inline__ void swift_flush_region(unsigned long addr)
  83 {
  84         __asm__ __volatile__("sta %%g0, [%0] %1\n\t" : :
  85                              "r" (addr), "i" (ASI_M_FLUSH_REGION));
  86 }
  87
  88 extern __inline__ void swift_flush_context(void)
  89 {
  90         __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t" : :
  91                              "i" (ASI_M_FLUSH_CTX));
  92 }
  93
  94 #endif /* !(_SPARC_SWIFT_H) */