linux/arch/sparc/kernel/cpu.c
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   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
  18DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 };
  19
  20struct cpu_iu_info {
  21  int psr_impl;
  22  int psr_vers;
  23  char* cpu_name;   /* should be enough I hope... */
  24};
  25
  26struct 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 */
  35static 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
  79static 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
 124char *sparc_cpu_type;
 125char *sparc_fpu_type;
 126
 127unsigned int fsr_storage;
 128
 129void __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}
 168