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