Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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/config.h> |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/init.h> |
| 10 | #include <linux/smp.h> |
| 11 | #include <linux/threads.h> |
| 12 | #include <asm/oplib.h> |
| 13 | #include <asm/page.h> |
| 14 | #include <asm/head.h> |
| 15 | #include <asm/psr.h> |
| 16 | #include <asm/mbus.h> |
| 17 | #include <asm/cpudata.h> |
| 18 | |
| 19 | DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 }; |
| 20 | |
| 21 | struct cpu_iu_info { |
| 22 | int psr_impl; |
| 23 | int psr_vers; |
| 24 | char* cpu_name; /* should be enough I hope... */ |
| 25 | }; |
| 26 | |
| 27 | struct cpu_fp_info { |
| 28 | int psr_impl; |
| 29 | int fp_vers; |
| 30 | char* fp_name; |
| 31 | }; |
| 32 | |
| 33 | /* In order to get the fpu type correct, you need to take the IDPROM's |
| 34 | * machine type value into consideration too. I will fix this. |
| 35 | */ |
| 36 | struct cpu_fp_info linux_sparc_fpu[] = { |
| 37 | { 0, 0, "Fujitsu MB86910 or Weitek WTL1164/5"}, |
| 38 | { 0, 1, "Fujitsu MB86911 or Weitek WTL1164/5 or LSI L64831"}, |
| 39 | { 0, 2, "LSI Logic L64802 or Texas Instruments ACT8847"}, |
| 40 | /* SparcStation SLC, SparcStation1 */ |
| 41 | { 0, 3, "Weitek WTL3170/2"}, |
| 42 | /* SPARCstation-5 */ |
| 43 | { 0, 4, "Lsi Logic/Meiko L64804 or compatible"}, |
| 44 | { 0, 5, "reserved"}, |
| 45 | { 0, 6, "reserved"}, |
| 46 | { 0, 7, "No FPU"}, |
| 47 | { 1, 0, "ROSS HyperSparc combined IU/FPU"}, |
| 48 | { 1, 1, "Lsi Logic L64814"}, |
| 49 | { 1, 2, "Texas Instruments TMS390-C602A"}, |
| 50 | { 1, 3, "Cypress CY7C602 FPU"}, |
| 51 | { 1, 4, "reserved"}, |
| 52 | { 1, 5, "reserved"}, |
| 53 | { 1, 6, "reserved"}, |
| 54 | { 1, 7, "No FPU"}, |
| 55 | { 2, 0, "BIT B5010 or B5110/20 or B5210"}, |
| 56 | { 2, 1, "reserved"}, |
| 57 | { 2, 2, "reserved"}, |
| 58 | { 2, 3, "reserved"}, |
| 59 | { 2, 4, "reserved"}, |
| 60 | { 2, 5, "reserved"}, |
| 61 | { 2, 6, "reserved"}, |
| 62 | { 2, 7, "No FPU"}, |
| 63 | /* SuperSparc 50 module */ |
| 64 | { 4, 0, "SuperSparc on-chip FPU"}, |
| 65 | /* SparcClassic */ |
| 66 | { 4, 4, "TI MicroSparc on chip FPU"}, |
| 67 | { 5, 0, "Matsushita MN10501"}, |
| 68 | { 5, 1, "reserved"}, |
| 69 | { 5, 2, "reserved"}, |
| 70 | { 5, 3, "reserved"}, |
| 71 | { 5, 4, "reserved"}, |
| 72 | { 5, 5, "reserved"}, |
| 73 | { 5, 6, "reserved"}, |
| 74 | { 5, 7, "No FPU"}, |
| 75 | { 9, 3, "Fujitsu or Weitek on-chip FPU"}, |
| 76 | }; |
| 77 | |
| 78 | #define NSPARCFPU (sizeof(linux_sparc_fpu)/sizeof(struct cpu_fp_info)) |
| 79 | |
| 80 | struct cpu_iu_info linux_sparc_chips[] = { |
| 81 | /* Sun4/100, 4/200, SLC */ |
| 82 | { 0, 0, "Fujitsu MB86900/1A or LSI L64831 SparcKIT-40"}, |
| 83 | /* borned STP1012PGA */ |
| 84 | { 0, 4, "Fujitsu MB86904"}, |
| 85 | { 0, 5, "Fujitsu TurboSparc MB86907"}, |
| 86 | /* SparcStation2, SparcServer 490 & 690 */ |
| 87 | { 1, 0, "LSI Logic Corporation - L64811"}, |
| 88 | /* SparcStation2 */ |
| 89 | { 1, 1, "Cypress/ROSS CY7C601"}, |
| 90 | /* Embedded controller */ |
| 91 | { 1, 3, "Cypress/ROSS CY7C611"}, |
| 92 | /* Ross Technologies HyperSparc */ |
| 93 | { 1, 0xf, "ROSS HyperSparc RT620"}, |
| 94 | { 1, 0xe, "ROSS HyperSparc RT625 or RT626"}, |
| 95 | /* ECL Implementation, CRAY S-MP Supercomputer... AIEEE! */ |
| 96 | /* Someone please write the code to support this beast! ;) */ |
| 97 | { 2, 0, "Bipolar Integrated Technology - B5010"}, |
| 98 | { 3, 0, "LSI Logic Corporation - unknown-type"}, |
| 99 | { 4, 0, "Texas Instruments, Inc. - SuperSparc-(II)"}, |
| 100 | /* SparcClassic -- borned STP1010TAB-50*/ |
| 101 | { 4, 1, "Texas Instruments, Inc. - MicroSparc"}, |
| 102 | { 4, 2, "Texas Instruments, Inc. - MicroSparc II"}, |
| 103 | { 4, 3, "Texas Instruments, Inc. - SuperSparc 51"}, |
| 104 | { 4, 4, "Texas Instruments, Inc. - SuperSparc 61"}, |
| 105 | { 4, 5, "Texas Instruments, Inc. - unknown"}, |
| 106 | { 5, 0, "Matsushita - MN10501"}, |
| 107 | { 6, 0, "Philips Corporation - unknown"}, |
| 108 | { 7, 0, "Harvest VLSI Design Center, Inc. - unknown"}, |
| 109 | /* Gallium arsenide 200MHz, BOOOOGOOOOMIPS!!! */ |
| 110 | { 8, 0, "Systems and Processes Engineering Corporation (SPEC)"}, |
| 111 | { 9, 0, "Fujitsu or Weitek Power-UP"}, |
| 112 | { 9, 1, "Fujitsu or Weitek Power-UP"}, |
| 113 | { 9, 2, "Fujitsu or Weitek Power-UP"}, |
| 114 | { 9, 3, "Fujitsu or Weitek Power-UP"}, |
| 115 | { 0xa, 0, "UNKNOWN CPU-VENDOR/TYPE"}, |
| 116 | { 0xb, 0, "UNKNOWN CPU-VENDOR/TYPE"}, |
| 117 | { 0xc, 0, "UNKNOWN CPU-VENDOR/TYPE"}, |
| 118 | { 0xd, 0, "UNKNOWN CPU-VENDOR/TYPE"}, |
| 119 | { 0xe, 0, "UNKNOWN CPU-VENDOR/TYPE"}, |
| 120 | { 0xf, 0, "UNKNOWN CPU-VENDOR/TYPE"}, |
| 121 | }; |
| 122 | |
| 123 | #define NSPARCCHIPS (sizeof(linux_sparc_chips)/sizeof(struct cpu_iu_info)) |
| 124 | |
| 125 | char *sparc_cpu_type; |
| 126 | char *sparc_fpu_type; |
| 127 | |
| 128 | unsigned int fsr_storage; |
| 129 | |
| 130 | void __init cpu_probe(void) |
| 131 | { |
| 132 | int psr_impl, psr_vers, fpu_vers; |
| 133 | int i, psr; |
| 134 | |
| 135 | psr_impl = ((get_psr()>>28)&0xf); |
| 136 | psr_vers = ((get_psr()>>24)&0xf); |
| 137 | |
| 138 | psr = get_psr(); |
| 139 | put_psr(psr | PSR_EF); |
| 140 | fpu_vers = ((get_fsr()>>17)&0x7); |
| 141 | put_psr(psr); |
| 142 | |
| 143 | for(i = 0; i<NSPARCCHIPS; i++) { |
| 144 | if(linux_sparc_chips[i].psr_impl == psr_impl) |
| 145 | if(linux_sparc_chips[i].psr_vers == psr_vers) { |
| 146 | sparc_cpu_type = linux_sparc_chips[i].cpu_name; |
| 147 | break; |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | if(i==NSPARCCHIPS) |
| 152 | printk("DEBUG: psr.impl = 0x%x psr.vers = 0x%x\n", psr_impl, |
| 153 | psr_vers); |
| 154 | |
| 155 | for(i = 0; i<NSPARCFPU; i++) { |
| 156 | if(linux_sparc_fpu[i].psr_impl == psr_impl) |
| 157 | if(linux_sparc_fpu[i].fp_vers == fpu_vers) { |
| 158 | sparc_fpu_type = linux_sparc_fpu[i].fp_name; |
| 159 | break; |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | if(i == NSPARCFPU) { |
| 164 | printk("DEBUG: psr.impl = 0x%x fsr.vers = 0x%x\n", psr_impl, |
| 165 | fpu_vers); |
| 166 | sparc_fpu_type = linux_sparc_fpu[31].fp_name; |
| 167 | } |
| 168 | } |