arch/sparc/kernel/cpu.c

   1 /* cpu.c: Dinky routines to look for the kind of Sparc cpu
   2  *        we are on.
   3  *
   4  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/init.h>
   9 #include <linux/smp.h>
  10 #include <linux/threads.h>
  11 #include <asm/oplib.h>
  12 #include <asm/page.h>
  13 #include <asm/head.h>
  14 #include <asm/psr.h>
  15 #include <asm/mbus.h>
  16 #include <asm/cpudata.h>
  17
  18 DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 };
  19
  20 struct cpu_iu_info {
  21   int psr_impl;
  22   int psr_vers;
  23   char* cpu_name;   /* should be enough I hope... */
  24 };
  25
  26 struct cpu_fp_info {
  27   int psr_impl;
  28   int fp_vers;
  29   char* fp_name;
  30 };
  31
  32 /* In order to get the fpu type correct, you need to take the IDPROM's
  33  * machine type value into consideration too.  I will fix this.
  34  */
  35 static struct cpu_fp_info linux_sparc_fpu[] = {
  36   { 0, 0, "Fujitsu MB86910 or Weitek WTL1164/5"},
  37   { 0, 1, "Fujitsu MB86911 or Weitek WTL1164/5 or LSI L64831"},
  38   { 0, 2, "LSI Logic L64802 or Texas Instruments ACT8847"},
  39   /* SparcStation SLC, SparcStation1 */
  40   { 0, 3, "Weitek WTL3170/2"},
  41   /* SPARCstation-5 */
  42   { 0, 4, "Lsi Logic/Meiko L64804 or compatible"},
  43   { 0, 5, "reserved"},
  44   { 0, 6, "reserved"},
  45   { 0, 7, "No FPU"},
  46   { 1, 0, "ROSS HyperSparc combined IU/FPU"},
  47   { 1, 1, "Lsi Logic L64814"},
  48   { 1, 2, "Texas Instruments TMS390-C602A"},
  49   { 1, 3, "Cypress CY7C602 FPU"},
  50   { 1, 4, "reserved"},
  51   { 1, 5, "reserved"},
  52   { 1, 6, "reserved"},
  53   { 1, 7, "No FPU"},
  54   { 2, 0, "BIT B5010 or B5110/20 or B5210"},
  55   { 2, 1, "reserved"},
  56   { 2, 2, "reserved"},
  57   { 2, 3, "reserved"},
  58   { 2, 4, "reserved"},
  59   { 2, 5, "reserved"},
  60   { 2, 6, "reserved"},
  61   { 2, 7, "No FPU"},
  62   /* SuperSparc 50 module */
  63   { 4, 0, "SuperSparc on-chip FPU"},
  64   /* SparcClassic */
  65   { 4, 4, "TI MicroSparc on chip FPU"},
  66   { 5, 0, "Matsushita MN10501"},
  67   { 5, 1, "reserved"},
  68   { 5, 2, "reserved"},
  69   { 5, 3, "reserved"},
  70   { 5, 4, "reserved"},
  71   { 5, 5, "reserved"},
  72   { 5, 6, "reserved"},
  73   { 5, 7, "No FPU"},
  74   { 9, 3, "Fujitsu or Weitek on-chip FPU"},
  75 };
  76
  77 #define NSPARCFPU  ARRAY_SIZE(linux_sparc_fpu)
  78
  79 static struct cpu_iu_info linux_sparc_chips[] = {
  80   /* Sun4/100, 4/200, SLC */
  81   { 0, 0, "Fujitsu  MB86900/1A or LSI L64831 SparcKIT-40"},
  82   /* borned STP1012PGA */
  83   { 0, 4, "Fujitsu  MB86904"},
  84   { 0, 5, "Fujitsu TurboSparc MB86907"},
  85   /* SparcStation2, SparcServer 490 & 690 */
  86   { 1, 0, "LSI Logic Corporation - L64811"},
  87   /* SparcStation2 */
  88   { 1, 1, "Cypress/ROSS CY7C601"},
  89   /* Embedded controller */
  90   { 1, 3, "Cypress/ROSS CY7C611"},
  91   /* Ross Technologies HyperSparc */
  92   { 1, 0xf, "ROSS HyperSparc RT620"},
  93   { 1, 0xe, "ROSS HyperSparc RT625 or RT626"},
  94   /* ECL Implementation, CRAY S-MP Supercomputer... AIEEE! */
  95   /* Someone please write the code to support this beast! ;) */
  96   { 2, 0, "Bipolar Integrated Technology - B5010"},
  97   { 3, 0, "LSI Logic Corporation - unknown-type"},
  98   { 4, 0, "Texas Instruments, Inc. - SuperSparc-(II)"},
  99   /* SparcClassic  --  borned STP1010TAB-50*/
 100   { 4, 1, "Texas Instruments, Inc. - MicroSparc"},
 101   { 4, 2, "Texas Instruments, Inc. - MicroSparc II"},
 102   { 4, 3, "Texas Instruments, Inc. - SuperSparc 51"},
 103   { 4, 4, "Texas Instruments, Inc. - SuperSparc 61"},
 104   { 4, 5, "Texas Instruments, Inc. - unknown"},
 105   { 5, 0, "Matsushita - MN10501"},
 106   { 6, 0, "Philips Corporation - unknown"},
 107   { 7, 0, "Harvest VLSI Design Center, Inc. - unknown"},
 108   /* Gallium arsenide 200MHz, BOOOOGOOOOMIPS!!! */
 109   { 8, 0, "Systems and Processes Engineering Corporation (SPEC)"},
 110   { 9, 0, "Fujitsu or Weitek Power-UP"},
 111   { 9, 1, "Fujitsu or Weitek Power-UP"},
 112   { 9, 2, "Fujitsu or Weitek Power-UP"},
 113   { 9, 3, "Fujitsu or Weitek Power-UP"},
 114   { 0xa, 0, "UNKNOWN CPU-VENDOR/TYPE"},
 115   { 0xb, 0, "UNKNOWN CPU-VENDOR/TYPE"},
 116   { 0xc, 0, "UNKNOWN CPU-VENDOR/TYPE"},
 117   { 0xd, 0, "UNKNOWN CPU-VENDOR/TYPE"},
 118   { 0xe, 0, "UNKNOWN CPU-VENDOR/TYPE"},
 119   { 0xf, 0, "UNKNOWN CPU-VENDOR/TYPE"},
 120 };
 121
 122 #define NSPARCCHIPS  ARRAY_SIZE(linux_sparc_chips)
 123
 124 char *sparc_cpu_type;
 125 char *sparc_fpu_type;
 126
 127 unsigned int fsr_storage;
 128
 129 void __init cpu_probe(void)
 130 {
 131         int psr_impl, psr_vers, fpu_vers;
 132         int i, psr;
 133
 134         psr_impl = ((get_psr()>>28)&0xf);
 135         psr_vers = ((get_psr()>>24)&0xf);
 136
 137         psr = get_psr();
 138         put_psr(psr | PSR_EF);
 139         fpu_vers = ((get_fsr()>>17)&0x7);
 140         put_psr(psr);
 141
 142         for(i = 0; i<NSPARCCHIPS; i++) {
 143                 if(linux_sparc_chips[i].psr_impl == psr_impl)
 144                         if(linux_sparc_chips[i].psr_vers == psr_vers) {
 145                                 sparc_cpu_type = linux_sparc_chips[i].cpu_name;
 146                                 break;
 147                         }
 148         }
 149
 150         if(i==NSPARCCHIPS)
 151                 printk("DEBUG: psr.impl = 0x%x   psr.vers = 0x%x\n", psr_impl,
 152                             psr_vers);
 153
 154         for(i = 0; i<NSPARCFPU; i++) {
 155                 if(linux_sparc_fpu[i].psr_impl == psr_impl)
 156                         if(linux_sparc_fpu[i].fp_vers == fpu_vers) {
 157                                 sparc_fpu_type = linux_sparc_fpu[i].fp_name;
 158                                 break;
 159                         }
 160         }
 161
 162         if(i == NSPARCFPU) {
 163                 printk("DEBUG: psr.impl = 0x%x  fsr.vers = 0x%x\n", psr_impl,
 164                             fpu_vers);
 165                 sparc_fpu_type = linux_sparc_fpu[31].fp_name;
 166         }
 167 }