arch/sparc/kernel/cpu_32.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 #include "kernel.h"
  19
  20 DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 };
  21
  22 struct cpu_iu_info {
  23         int psr_impl;
  24         int psr_vers;
  25         char *cpu_name;   /* should be enough I hope... */
  26 };
  27
  28 struct cpu_fp_info {
  29         int psr_impl;
  30         int fp_vers;
  31         char *fp_name;
  32 };
  33
  34 /* In order to get the fpu type correct, you need to take the IDPROM's
  35  * machine type value into consideration too.  I will fix this.
  36  */
  37 #define CPU_FP(psr, ver, name) \
  38 { .psr_impl = (psr), .fp_vers = (ver), .fp_name = (name) }
  39 static struct cpu_fp_info linux_sparc_fpu[] = {
  40         CPU_FP(0, 0, "Fujitsu MB86910 or Weitek WTL1164/5"),
  41         CPU_FP(0, 1, "Fujitsu MB86911 or Weitek WTL1164/5 or LSI L64831"),
  42         CPU_FP(0, 2, "LSI Logic L64802 or Texas Instruments ACT8847"),
  43         /* SparcStation SLC, SparcStation1 */
  44         CPU_FP(0, 3, "Weitek WTL3170/2"),
  45         /* SPARCstation-5 */
  46         CPU_FP(0, 4, "Lsi Logic/Meiko L64804 or compatible"),
  47         CPU_FP(0, 5, "reserved"),
  48         CPU_FP(0, 6, "reserved"),
  49         CPU_FP(0, 7, "No FPU"),
  50         CPU_FP(1, 0, "ROSS HyperSparc combined IU/FPU"),
  51         CPU_FP(1, 1, "Lsi Logic L64814"),
  52         CPU_FP(1, 2, "Texas Instruments TMS390-C602A"),
  53         CPU_FP(1, 3, "Cypress CY7C602 FPU"),
  54         CPU_FP(1, 4, "reserved"),
  55         CPU_FP(1, 5, "reserved"),
  56         CPU_FP(1, 6, "reserved"),
  57         CPU_FP(1, 7, "No FPU"),
  58         CPU_FP(2, 0, "BIT B5010 or B5110/20 or B5210"),
  59         CPU_FP(2, 1, "reserved"),
  60         CPU_FP(2, 2, "reserved"),
  61         CPU_FP(2, 3, "reserved"),
  62         CPU_FP(2, 4, "reserved"),
  63         CPU_FP(2, 5, "reserved"),
  64         CPU_FP(2, 6, "reserved"),
  65         CPU_FP(2, 7, "No FPU"),
  66         /* SuperSparc 50 module */
  67         CPU_FP(4, 0, "SuperSparc on-chip FPU"),
  68         /* SparcClassic */
  69         CPU_FP(4, 4, "TI MicroSparc on chip FPU"),
  70         CPU_FP(5, 0, "Matsushita MN10501"),
  71         CPU_FP(5, 1, "reserved"),
  72         CPU_FP(5, 2, "reserved"),
  73         CPU_FP(5, 3, "reserved"),
  74         CPU_FP(5, 4, "reserved"),
  75         CPU_FP(5, 5, "reserved"),
  76         CPU_FP(5, 6, "reserved"),
  77         CPU_FP(5, 7, "No FPU"),
  78         CPU_FP(9, 3, "Fujitsu or Weitek on-chip FPU"),
  79 };
  80
  81 #define NSPARCFPU  ARRAY_SIZE(linux_sparc_fpu)
  82
  83 #define CPU_INFO(psr, ver, name) \
  84 { .psr_impl = (psr), .psr_vers = (ver), .cpu_name = (name) }
  85 static struct cpu_iu_info linux_sparc_chips[] = {
  86         /* Sun4/100, 4/200, SLC */
  87         CPU_INFO(0, 0, "Fujitsu  MB86900/1A or LSI L64831 SparcKIT-40"),
  88         /* borned STP1012PGA */
  89         CPU_INFO(0, 4, "Fujitsu  MB86904"),
  90         CPU_INFO(0, 5, "Fujitsu TurboSparc MB86907"),
  91         /* SparcStation2, SparcServer 490 & 690 */
  92         CPU_INFO(1, 0, "LSI Logic Corporation - L64811"),
  93         /* SparcStation2 */
  94         CPU_INFO(1, 1, "Cypress/ROSS CY7C601"),
  95         /* Embedded controller */
  96         CPU_INFO(1, 3, "Cypress/ROSS CY7C611"),
  97         /* Ross Technologies HyperSparc */
  98         CPU_INFO(1, 0xf, "ROSS HyperSparc RT620"),
  99         CPU_INFO(1, 0xe, "ROSS HyperSparc RT625 or RT626"),
 100         /* ECL Implementation, CRAY S-MP Supercomputer... AIEEE! */
 101         /* Someone please write the code to support this beast! ;) */
 102         CPU_INFO(2, 0, "Bipolar Integrated Technology - B5010"),
 103         CPU_INFO(3, 0, "LSI Logic Corporation - unknown-type"),
 104         CPU_INFO(4, 0, "Texas Instruments, Inc. - SuperSparc-(II)"),
 105         /* SparcClassic  --  borned STP1010TAB-50*/
 106         CPU_INFO(4, 1, "Texas Instruments, Inc. - MicroSparc"),
 107         CPU_INFO(4, 2, "Texas Instruments, Inc. - MicroSparc II"),
 108         CPU_INFO(4, 3, "Texas Instruments, Inc. - SuperSparc 51"),
 109         CPU_INFO(4, 4, "Texas Instruments, Inc. - SuperSparc 61"),
 110         CPU_INFO(4, 5, "Texas Instruments, Inc. - unknown"),
 111         CPU_INFO(5, 0, "Matsushita - MN10501"),
 112         CPU_INFO(6, 0, "Philips Corporation - unknown"),
 113         CPU_INFO(7, 0, "Harvest VLSI Design Center, Inc. - unknown"),
 114         /* Gallium arsenide 200MHz, BOOOOGOOOOMIPS!!! */
 115         CPU_INFO(8, 0, "Systems and Processes Engineering Corporation (SPEC)"),
 116         CPU_INFO(9, 0, "Fujitsu or Weitek Power-UP"),
 117         CPU_INFO(9, 1, "Fujitsu or Weitek Power-UP"),
 118         CPU_INFO(9, 2, "Fujitsu or Weitek Power-UP"),
 119         CPU_INFO(9, 3, "Fujitsu or Weitek Power-UP"),
 120         CPU_INFO(0xa, 0, "UNKNOWN CPU-VENDOR/TYPE"),
 121         CPU_INFO(0xb, 0, "UNKNOWN CPU-VENDOR/TYPE"),
 122         CPU_INFO(0xc, 0, "UNKNOWN CPU-VENDOR/TYPE"),
 123         CPU_INFO(0xd, 0, "UNKNOWN CPU-VENDOR/TYPE"),
 124         CPU_INFO(0xe, 0, "UNKNOWN CPU-VENDOR/TYPE"),
 125         CPU_INFO(0xf, 0, "UNKNOWN CPU-VENDOR/TYPE"),
 126 };
 127
 128 #define NSPARCCHIPS  ARRAY_SIZE(linux_sparc_chips)
 129
 130 const char *sparc_cpu_type;
 131 const char *sparc_fpu_type;
 132
 133 unsigned int fsr_storage;
 134
 135 void __cpuinit cpu_probe(void)
 136 {
 137         int psr_impl, psr_vers, fpu_vers;
 138         int i, psr;
 139
 140         psr_impl = ((get_psr() >> 28) & 0xf);
 141         psr_vers = ((get_psr() >> 24) & 0xf);
 142
 143         psr = get_psr();
 144         put_psr(psr | PSR_EF);
 145         fpu_vers = ((get_fsr() >> 17) & 0x7);
 146         put_psr(psr);
 147
 148         for (i = 0; i < NSPARCCHIPS; i++) {
 149                 if (linux_sparc_chips[i].psr_impl == psr_impl)
 150                         if (linux_sparc_chips[i].psr_vers == psr_vers) {
 151                                 sparc_cpu_type = linux_sparc_chips[i].cpu_name;
 152                                 break;
 153                         }
 154         }
 155
 156         if (i == NSPARCCHIPS)
 157         {
 158                 printk(KERN_ERR "CPU: Unknown chip, impl[0x%x] vers[0x%x]\n",
 159                        psr_impl, psr_vers);
 160                 sparc_cpu_type = "Unknown CPU";
 161         }
 162
 163         for (i = 0; i < NSPARCFPU; i++) {
 164                 if (linux_sparc_fpu[i].psr_impl == psr_impl)
 165                         if (linux_sparc_fpu[i].fp_vers == fpu_vers) {
 166                                 sparc_fpu_type = linux_sparc_fpu[i].fp_name;
 167                                 break;
 168                         }
 169         }
 170
 171         if (i == NSPARCFPU) {
 172                 printk(KERN_ERR "FPU: Unknown chip, impl[0x%x] vers[0x%x]\n",
 173                        psr_impl, fpu_vers);
 174                 sparc_fpu_type = "Unknown FPU";
 175         }
 176 }