arch/sparc/include/asm/turbosparc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * turbosparc.h:  Defines specific to the TurboSparc module.
   4  *            This is SRMMU stuff.
   5  *
   6  * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   7  */
   8 #ifndef _SPARC_TURBOSPARC_H
   9 #define _SPARC_TURBOSPARC_H
  10
  11 #include <asm/asi.h>
  12 #include <asm/pgtsrmmu.h>
  13
  14 /* Bits in the SRMMU control register for TurboSparc modules.
  15  *
  16  * -------------------------------------------------------------------
  17  * |impl-vers| RSV| PMC |PE|PC| RSV |BM| RFR |IC|DC|PSO|RSV|ICS|NF|ME|
  18  * -------------------------------------------------------------------
  19  *  31    24 23-21 20-19 18 17 16-15 14 13-10  9  8  7  6-3   2  1  0
  20  *
  21  * BM: Boot Mode -- 0 = not in boot mode, 1 = in boot mode
  22  *
  23  * This indicates whether the TurboSparc is in boot-mode or not.
  24  *
  25  * IC: Instruction Cache -- 0 = off, 1 = on
  26  * DC: Data Cache -- 0 = off, 1 = 0n
  27  *
  28  * These bits enable the on-cpu TurboSparc split I/D caches.
  29  *
  30  * ICS: ICache Snooping -- 0 = disable, 1 = enable snooping of icache
  31  * NF: No Fault -- 0 = faults generate traps, 1 = faults don't trap
  32  * ME: MMU enable -- 0 = mmu not translating, 1 = mmu translating
  33  *
  34  */
  35
  36 #define TURBOSPARC_MMUENABLE    0x00000001
  37 #define TURBOSPARC_NOFAULT      0x00000002
  38 #define TURBOSPARC_ICSNOOP      0x00000004
  39 #define TURBOSPARC_PSO          0x00000080
  40 #define TURBOSPARC_DCENABLE     0x00000100   /* Enable data cache */
  41 #define TURBOSPARC_ICENABLE     0x00000200   /* Enable instruction cache */
  42 #define TURBOSPARC_BMODE        0x00004000
  43 #define TURBOSPARC_PARITYODD    0x00020000   /* Parity odd, if enabled */
  44 #define TURBOSPARC_PCENABLE     0x00040000   /* Enable parity checking */
  45
  46 /* Bits in the CPU configuration register for TurboSparc modules.
  47  *
  48  * -------------------------------------------------------
  49  * |IOClk|SNP|AXClk| RAH |  WS |  RSV  |SBC|WT|uS2|SE|SCC|
  50  * -------------------------------------------------------
  51  *    31   30 29-28 27-26 25-23   22-8  7-6  5  4   3 2-0
  52  *
  53  */
  54
  55 #define TURBOSPARC_SCENABLE 0x00000008   /* Secondary cache enable */
  56 #define TURBOSPARC_uS2      0x00000010   /* Swift compatibility mode */
  57 #define TURBOSPARC_WTENABLE 0x00000020   /* Write thru for dcache */
  58 #define TURBOSPARC_SNENABLE 0x40000000   /* DVMA snoop enable */
  59
  60 #ifndef __ASSEMBLY__
  61
  62 /* Bits [13:5] select one of 512 instruction cache tags */
  63 static inline void turbosparc_inv_insn_tag(unsigned long addr)
  64 {
  65         __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
  66                              : /* no outputs */
  67                              : "r" (addr), "i" (ASI_M_TXTC_TAG)
  68                              : "memory");
  69 }
  70
  71 /* Bits [13:5] select one of 512 data cache tags */
  72 static inline void turbosparc_inv_data_tag(unsigned long addr)
  73 {
  74         __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
  75                              : /* no outputs */
  76                              : "r" (addr), "i" (ASI_M_DATAC_TAG)
  77                              : "memory");
  78 }
  79
  80 static inline void turbosparc_flush_icache(void)
  81 {
  82         unsigned long addr;
  83
  84         for (addr = 0; addr < 0x4000; addr += 0x20)
  85                 turbosparc_inv_insn_tag(addr);
  86 }
  87
  88 static inline void turbosparc_flush_dcache(void)
  89 {
  90         unsigned long addr;
  91
  92         for (addr = 0; addr < 0x4000; addr += 0x20)
  93                 turbosparc_inv_data_tag(addr);
  94 }
  95
  96 static inline void turbosparc_idflash_clear(void)
  97 {
  98         unsigned long addr;
  99
 100         for (addr = 0; addr < 0x4000; addr += 0x20) {
 101                 turbosparc_inv_insn_tag(addr);
 102                 turbosparc_inv_data_tag(addr);
 103         }
 104 }
 105
 106 static inline void turbosparc_set_ccreg(unsigned long regval)
 107 {
 108         __asm__ __volatile__("sta %0, [%1] %2\n\t"
 109                              : /* no outputs */
 110                              : "r" (regval), "r" (0x600), "i" (ASI_M_MMUREGS)
 111                              : "memory");
 112 }
 113
 114 static inline unsigned long turbosparc_get_ccreg(void)
 115 {
 116         unsigned long regval;
 117
 118         __asm__ __volatile__("lda [%1] %2, %0\n\t"
 119                              : "=r" (regval)
 120                              : "r" (0x600), "i" (ASI_M_MMUREGS));
 121         return regval;
 122 }
 123
 124 #endif /* !__ASSEMBLY__ */
 125
 126 #endif /* !(_SPARC_TURBOSPARC_H) */