LXR linux/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 */
  30static 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 */
  39static 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
  47static 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
  55static 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
  63static 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. */
  74static 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
  82static 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
  90static 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
  98static 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) */
 107