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/* cpu.c: Dinky routines to look for the kind of Sparc cpu

 *        we are on.

 *

 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)

 */

#include <linux/kernel.h>

#include <asm/oplib.h>

#include <asm/page.h>

#include <asm/head.h>

#include <asm/psr.h>

#include <asm/mbus.h>

struct cpu_iu_info {

  int psr_impl;

  int psr_vers;

  char* cpu_name;   /* should be enough I hope... */

};

struct cpu_fp_info {

  int psr_impl;

  int fp_vers;

  char* fp_name;

};

/* In order to get the fpu type correct, you need to take the IDPROM's

 * machine type value into consideration too.  I will fix this.

 */

struct cpu_fp_info linux_sparc_fpu[] = {

  { 0, 0, "Fujitsu MB86910 or Weitek WTL1164/5"},

  { 0, 1, "Fujitsu MB86911 or Weitek WTL1164/5 or LSI L64831"},

  { 0, 2, "LSI Logic L64802 or Texas Instruments ACT8847"},

  /* SparcStation SLC, SparcStation1 */

  { 0, 3, "Weitek WTL3170/2"},

  /* SPARCstation-5 */

  { 0, 4, "Lsi Logic/Meiko L64804 or compatible"},

  { 0, 5, "reserved"},

  { 0, 6, "reserved"},

  { 0, 7, "No FPU"},

  { 1, 0, "ROSS HyperSparc combined IU/FPU"},

  { 1, 1, "Lsi Logic L64814"},

  { 1, 2, "Texas Instruments TMS390-C602A"},

  { 1, 3, "Cypress CY7C602 FPU"},

  { 1, 4, "reserved"},

  { 1, 5, "reserved"},

  { 1, 6, "reserved"},

  { 1, 7, "No FPU"},

  { 2, 0, "BIT B5010 or B5110/20 or B5210"},

  { 2, 1, "reserved"},

  { 2, 2, "reserved"},

  { 2, 3, "reserved"},

  { 2, 4, "reserved"},

  { 2, 5, "reserved"},

  { 2, 6, "reserved"},

  { 2, 7, "No FPU"},

  /* SuperSparc 50 module */

  { 4, 0, "SuperSparc on-chip FPU"},

  /* SparcClassic */

  { 4, 4, "TI MicroSparc on chip FPU"},

  { 5, 0, "Matsushita MN10501"},

  { 5, 1, "reserved"},

  { 5, 2, "reserved"},

  { 5, 3, "reserved"},

  { 5, 4, "reserved"},

  { 5, 5, "reserved"},

  { 5, 6, "reserved"},

  { 5, 7, "No FPU"},

};

#define NSPARCFPU  (sizeof(linux_sparc_fpu)/sizeof(struct cpu_fp_info))

struct cpu_iu_info linux_sparc_chips[] = {

  /* Sun4/100, 4/200, SLC */

  { 0, 0, "Fujitsu  MB86900/1A or LSI L64831 SparcKIT-40"},

  /* borned STP1012PGA */

  { 0, 4, "Fujitsu  MB86904"},

  /* SparcStation2, SparcServer 490 & 690 */

  { 1, 0, "LSI Logic Corporation - L64811"},

  /* SparcStation2 */

  { 1, 1, "Cypress/ROSS CY7C601"},

  /* Embedded controller */

  { 1, 3, "Cypress/ROSS CY7C611"},

  /* Ross Technologies HyperSparc */

  { 1, 0xf, "ROSS HyperSparc RT620"},

  { 1, 0xe, "ROSS HyperSparc RT625"},

  /* ECL Implementation, CRAY S-MP Supercomputer... AIEEE! */

  /* Someone please write the code to support this beast! ;) */

  { 2, 0, "Bipolar Integrated Technology - B5010"},

  { 3, 0, "LSI Logic Corporation - unknown-type"},

  { 4, 0, "Texas Instruments, Inc. - SuperSparc 50"},

  /* SparcClassic  --  borned STP1010TAB-50*/

  { 4, 1, "Texas Instruments, Inc. - MicroSparc"},

  { 4, 2, "Texas Instruments, Inc. - MicroSparc II"},

  { 4, 3, "Texas Instruments, Inc. - SuperSparc 51"},

  { 4, 4, "Texas Instruments, Inc. - SuperSparc 61"},

  { 4, 5, "Texas Instruments, Inc. - unknown"},

  { 5, 0, "Matsushita - MN10501"},

  { 6, 0, "Philips Corporation - unknown"},

  { 7, 0, "Harvest VLSI Design Center, Inc. - unknown"},

  /* Gallium arsenide 200MHz, BOOOOGOOOOMIPS!!! */

  { 8, 0, "Systems and Processes Engineering Corporation (SPEC)"},

  { 9, 0, "Fujitsu #3"},

  { 0xa, 0, "UNKNOWN CPU-VENDOR/TYPE"},

  { 0xb, 0, "UNKNOWN CPU-VENDOR/TYPE"},

  { 0xc, 0, "UNKNOWN CPU-VENDOR/TYPE"},

  { 0xd, 0, "UNKNOWN CPU-VENDOR/TYPE"},

  { 0xe, 0, "UNKNOWN CPU-VENDOR/TYPE"},

  { 0xf, 0, "UNKNOWN CPU-VENDOR/TYPE"},

};

#define NSPARCCHIPS  (sizeof(linux_sparc_chips)/sizeof(struct cpu_iu_info))

char *sparc_cpu_type[NCPUS] = { "cpu-oops", "cpu-oops1", "cpu-oops2", "cpu-oops3" };

char *sparc_fpu_type[NCPUS] = { "fpu-oops", "fpu-oops1", "fpu-oops2", "fpu-oops3" };

unsigned int fsr_storage;

void

cpu_probe(void)

{

        int psr_impl, psr_vers, fpu_vers;

        int i, cpuid;

        cpuid = get_cpuid();

        psr_impl = ((get_psr()>>28)&0xf);

        psr_vers = ((get_psr()>>24)&0xf);

        fpu_vers = ((get_fsr()>>17)&0x7);

        for(i = 0; i<NSPARCCHIPS; i++) {

                if(linux_sparc_chips[i].psr_impl == psr_impl)

                        if(linux_sparc_chips[i].psr_vers == psr_vers) {

                                sparc_cpu_type[cpuid] = linux_sparc_chips[i].cpu_name;

                                break;

                        }

        }

        if(i==NSPARCCHIPS)

                printk("DEBUG: psr.impl = 0x%x   psr.vers = 0x%x\n", psr_impl,

                            psr_vers);

        for(i = 0; i<NSPARCFPU; i++) {

                if(linux_sparc_fpu[i].psr_impl == psr_impl)

                        if(linux_sparc_fpu[i].fp_vers == fpu_vers) {

                                sparc_fpu_type[cpuid] = linux_sparc_fpu[i].fp_name;

                                break;

                        }

        }

        if(i == NSPARCFPU) {

                printk("DEBUG: psr.impl = 0x%x  fsr.vers = 0x%x\n", psr_impl,

                            fpu_vers);

                sparc_fpu_type[cpuid] = linux_sparc_fpu[31].fp_name;

        }

}