diff options
Diffstat (limited to 'arch/sparc/kernel/cpu.c')
| -rw-r--r-- | arch/sparc/kernel/cpu.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/arch/sparc/kernel/cpu.c b/arch/sparc/kernel/cpu.c new file mode 100644 index 0000000..6a4ebc6 --- /dev/null +++ b/arch/sparc/kernel/cpu.c @@ -0,0 +1,168 @@ +/* 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/config.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/smp.h> +#include <linux/threads.h> +#include <asm/oplib.h> +#include <asm/page.h> +#include <asm/head.h> +#include <asm/psr.h> +#include <asm/mbus.h> +#include <asm/cpudata.h> + +DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 }; + +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"}, + { 9, 3, "Fujitsu or Weitek on-chip 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"}, + { 0, 5, "Fujitsu TurboSparc MB86907"}, + /* 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 or RT626"}, + /* 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-(II)"}, + /* 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 or Weitek Power-UP"}, + { 9, 1, "Fujitsu or Weitek Power-UP"}, + { 9, 2, "Fujitsu or Weitek Power-UP"}, + { 9, 3, "Fujitsu or Weitek Power-UP"}, + { 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; +char *sparc_fpu_type; + +unsigned int fsr_storage; + +void __init cpu_probe(void) +{ + int psr_impl, psr_vers, fpu_vers; + int i, psr; + + psr_impl = ((get_psr()>>28)&0xf); + psr_vers = ((get_psr()>>24)&0xf); + + psr = get_psr(); + put_psr(psr | PSR_EF); + fpu_vers = ((get_fsr()>>17)&0x7); + put_psr(psr); + + 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 = 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 = 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 = linux_sparc_fpu[31].fp_name; + } +} |