arch/sparc/kernel/cpu.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
  12 #include <asm/spitfire.h>
  13 #include <asm/oplib.h>
  14 #include <asm/page.h>
  15 #include <asm/head.h>
  16 #include <asm/psr.h>
  17 #include <asm/mbus.h>
  18 #include <asm/cpudata.h>
  19
  20 #include "kernel.h"
  21
  22 DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 };
  23
  24 struct cpu_info {
  25         int psr_vers;
  26         const char *name;
  27 };
  28
  29 struct fpu_info {
  30         int fp_vers;
  31         const char *name;
  32 };
  33
  34 #define NOCPU 8
  35 #define NOFPU 8
  36
  37 struct manufacturer_info {
  38         int psr_impl;
  39         struct cpu_info cpu_info[NOCPU];
  40         struct fpu_info fpu_info[NOFPU];
  41 };
  42
  43 #define CPU(ver, _name) \
  44 { .psr_vers = ver, .name = _name }
  45
  46 #define FPU(ver, _name) \
  47 { .fp_vers = ver, .name = _name }
  48
  49 static const struct manufacturer_info __initconst manufacturer_info[] = {
  50 {
  51         0,
  52         /* Sun4/100, 4/200, SLC */
  53         .cpu_info = {
  54                 CPU(0, "Fujitsu  MB86900/1A or LSI L64831 SparcKIT-40"),
  55                 /* borned STP1012PGA */
  56                 CPU(4,  "Fujitsu  MB86904"),
  57                 CPU(5, "Fujitsu TurboSparc MB86907"),
  58                 CPU(-1, NULL)
  59         },
  60         .fpu_info = {
  61                 FPU(0, "Fujitsu MB86910 or Weitek WTL1164/5"),
  62                 FPU(1, "Fujitsu MB86911 or Weitek WTL1164/5 or LSI L64831"),
  63                 FPU(2, "LSI Logic L64802 or Texas Instruments ACT8847"),
  64                 /* SparcStation SLC, SparcStation1 */
  65                 FPU(3, "Weitek WTL3170/2"),
  66                 /* SPARCstation-5 */
  67                 FPU(4, "Lsi Logic/Meiko L64804 or compatible"),
  68                 FPU(-1, NULL)
  69         }
  70 },{
  71         1,
  72         .cpu_info = {
  73                 /* SparcStation2, SparcServer 490 & 690 */
  74                 CPU(0, "LSI Logic Corporation - L64811"),
  75                 /* SparcStation2 */
  76                 CPU(1, "Cypress/ROSS CY7C601"),
  77                 /* Embedded controller */
  78                 CPU(3, "Cypress/ROSS CY7C611"),
  79                 /* Ross Technologies HyperSparc */
  80                 CPU(0xf, "ROSS HyperSparc RT620"),
  81                 CPU(0xe, "ROSS HyperSparc RT625 or RT626"),
  82                 CPU(-1, NULL)
  83         },
  84         .fpu_info = {
  85                 FPU(0, "ROSS HyperSparc combined IU/FPU"),
  86                 FPU(1, "Lsi Logic L64814"),
  87                 FPU(2, "Texas Instruments TMS390-C602A"),
  88                 FPU(3, "Cypress CY7C602 FPU"),
  89                 FPU(-1, NULL)
  90         }
  91 },{
  92         2,
  93         .cpu_info = {
  94                 /* ECL Implementation, CRAY S-MP Supercomputer... AIEEE! */
  95                 /* Someone please write the code to support this beast! ;) */
  96                 CPU(0, "Bipolar Integrated Technology - B5010"),
  97                 CPU(-1, NULL)
  98         },
  99         .fpu_info = {
 100                 FPU(-1, NULL)
 101         }
 102 },{
 103         3,
 104         .cpu_info = {
 105                 CPU(0, "LSI Logic Corporation - unknown-type"),
 106                 CPU(-1, NULL)
 107         },
 108         .fpu_info = {
 109                 FPU(-1, NULL)
 110         }
 111 },{
 112         4,
 113         .cpu_info = {
 114                 CPU(0, "Texas Instruments, Inc. - SuperSparc-(II)"),
 115                 /* SparcClassic  --  borned STP1010TAB-50*/
 116                 CPU(1, "Texas Instruments, Inc. - MicroSparc"),
 117                 CPU(2, "Texas Instruments, Inc. - MicroSparc II"),
 118                 CPU(3, "Texas Instruments, Inc. - SuperSparc 51"),
 119                 CPU(4, "Texas Instruments, Inc. - SuperSparc 61"),
 120                 CPU(5, "Texas Instruments, Inc. - unknown"),
 121                 CPU(-1, NULL)
 122         },
 123         .fpu_info = {
 124                 /* SuperSparc 50 module */
 125                 FPU(0, "SuperSparc on-chip FPU"),
 126                 /* SparcClassic */
 127                 FPU(4, "TI MicroSparc on chip FPU"),
 128                 FPU(-1, NULL)
 129         }
 130 },{
 131         5,
 132         .cpu_info = {
 133                 CPU(0, "Matsushita - MN10501"),
 134                 CPU(-1, NULL)
 135         },
 136         .fpu_info = {
 137                 FPU(0, "Matsushita MN10501"),
 138                 FPU(-1, NULL)
 139         }
 140 },{
 141         6,
 142         .cpu_info = {
 143                 CPU(0, "Philips Corporation - unknown"),
 144                 CPU(-1, NULL)
 145         },
 146         .fpu_info = {
 147                 FPU(-1, NULL)
 148         }
 149 },{
 150         7,
 151         .cpu_info = {
 152                 CPU(0, "Harvest VLSI Design Center, Inc. - unknown"),
 153                 CPU(-1, NULL)
 154         },
 155         .fpu_info = {
 156                 FPU(-1, NULL)
 157         }
 158 },{
 159         8,
 160         .cpu_info = {
 161                 CPU(0, "Systems and Processes Engineering Corporation (SPEC)"),
 162                 CPU(-1, NULL)
 163         },
 164         .fpu_info = {
 165                 FPU(-1, NULL)
 166         }
 167 },{
 168         9,
 169         .cpu_info = {
 170                 /* Gallium arsenide 200MHz, BOOOOGOOOOMIPS!!! */
 171                 CPU(0, "Fujitsu or Weitek Power-UP"),
 172                 CPU(1, "Fujitsu or Weitek Power-UP"),
 173                 CPU(2, "Fujitsu or Weitek Power-UP"),
 174                 CPU(3, "Fujitsu or Weitek Power-UP"),
 175                 CPU(-1, NULL)
 176         },
 177         .fpu_info = {
 178                 FPU(3, "Fujitsu or Weitek on-chip FPU"),
 179                 FPU(-1, NULL)
 180         }
 181 },{
 182         0x17,
 183         .cpu_info = {
 184                 CPU(0x10, "TI UltraSparc I   (SpitFire)"),
 185                 CPU(0x11, "TI UltraSparc II  (BlackBird)"),
 186                 CPU(0x12, "TI UltraSparc IIi (Sabre)"),
 187                 CPU(0x13, "TI UltraSparc IIe (Hummingbird)"),
 188                 CPU(-1, NULL)
 189         },
 190         .fpu_info = {
 191                 FPU(0x10, "UltraSparc I integrated FPU"),
 192                 FPU(0x11, "UltraSparc II integrated FPU"),
 193                 FPU(0x12, "UltraSparc IIi integrated FPU"),
 194                 FPU(0x13, "UltraSparc IIe integrated FPU"),
 195                 FPU(-1, NULL)
 196         }
 197 },{
 198         0x22,
 199         .cpu_info = {
 200                 CPU(0x10, "TI UltraSparc I   (SpitFire)"),
 201                 CPU(-1, NULL)
 202         },
 203         .fpu_info = {
 204                 FPU(0x10, "UltraSparc I integrated FPU"),
 205                 FPU(-1, NULL)
 206         }
 207 },{
 208         0x3e,
 209         .cpu_info = {
 210                 CPU(0x14, "TI UltraSparc III (Cheetah)"),
 211                 CPU(0x15, "TI UltraSparc III+ (Cheetah+)"),
 212                 CPU(0x16, "TI UltraSparc IIIi (Jalapeno)"),
 213                 CPU(0x18, "TI UltraSparc IV (Jaguar)"),
 214                 CPU(0x19, "TI UltraSparc IV+ (Panther)"),
 215                 CPU(0x22, "TI UltraSparc IIIi+ (Serrano)"),
 216                 CPU(-1, NULL)
 217         },
 218         .fpu_info = {
 219                 FPU(0x14, "UltraSparc III integrated FPU"),
 220                 FPU(0x15, "UltraSparc III+ integrated FPU"),
 221                 FPU(0x16, "UltraSparc IIIi integrated FPU"),
 222                 FPU(0x18, "UltraSparc IV integrated FPU"),
 223                 FPU(0x19, "UltraSparc IV+ integrated FPU"),
 224                 FPU(0x22, "UltraSparc IIIi+ integrated FPU"),
 225                 FPU(-1, NULL)
 226         }
 227 }};
 228
 229 /* In order to get the fpu type correct, you need to take the IDPROM's
 230  * machine type value into consideration too.  I will fix this.
 231  */
 232
 233 const char *sparc_cpu_type;
 234 const char *sparc_fpu_type;
 235
 236 unsigned int fsr_storage;
 237
 238 static void set_cpu_and_fpu(int psr_impl, int psr_vers, int fpu_vers)
 239 {
 240         sparc_cpu_type = NULL;
 241         sparc_fpu_type = NULL;
 242         if (psr_impl < ARRAY_SIZE(manufacturer_info))
 243         {
 244                 const struct cpu_info *cpu;
 245                 const struct fpu_info *fpu;
 246
 247                 cpu = &manufacturer_info[psr_impl].cpu_info[0];
 248                 while (cpu->psr_vers != -1)
 249                 {
 250                         if (cpu->psr_vers == psr_vers) {
 251                                 sparc_cpu_type = cpu->name;
 252                                 sparc_fpu_type = "No FPU";
 253                                 break;
 254                         }
 255                         cpu++;
 256                 }
 257                 fpu =  &manufacturer_info[psr_impl].fpu_info[0];
 258                 while (fpu->fp_vers != -1)
 259                 {
 260                         if (fpu->fp_vers == fpu_vers) {
 261                                 sparc_fpu_type = fpu->name;
 262                                 break;
 263                         }
 264                         fpu++;
 265                 }
 266         }
 267         if (sparc_cpu_type == NULL)
 268         {
 269                 printk(KERN_ERR "CPU: Unknown chip, impl[0x%x] vers[0x%x]\n",
 270                        psr_impl, psr_vers);
 271                 sparc_cpu_type = "Unknown CPU";
 272         }
 273         if (sparc_fpu_type == NULL)
 274         {
 275                 printk(KERN_ERR "FPU: Unknown chip, impl[0x%x] vers[0x%x]\n",
 276                        psr_impl, fpu_vers);
 277                 sparc_fpu_type = "Unknown FPU";
 278         }
 279 }
 280
 281 #ifdef CONFIG_SPARC32
 282 void __cpuinit cpu_probe(void)
 283 {
 284         int psr_impl, psr_vers, fpu_vers;
 285         int psr;
 286
 287         psr_impl = ((get_psr() >> 28) & 0xf);
 288         psr_vers = ((get_psr() >> 24) & 0xf);
 289
 290         psr = get_psr();
 291         put_psr(psr | PSR_EF);
 292         fpu_vers = ((get_fsr() >> 17) & 0x7);
 293         put_psr(psr);
 294
 295         set_cpu_and_fpu(psr_impl, psr_vers, fpu_vers);
 296 }
 297 #else
 298 static void __init sun4v_cpu_probe(void)
 299 {
 300         switch (sun4v_chip_type) {
 301         case SUN4V_CHIP_NIAGARA1:
 302                 sparc_cpu_type = "UltraSparc T1 (Niagara)";
 303                 sparc_fpu_type = "UltraSparc T1 integrated FPU";
 304                 break;
 305
 306         case SUN4V_CHIP_NIAGARA2:
 307                 sparc_cpu_type = "UltraSparc T2 (Niagara2)";
 308                 sparc_fpu_type = "UltraSparc T2 integrated FPU";
 309                 break;
 310
 311         default:
 312                 printk(KERN_WARNING "CPU: Unknown sun4v cpu type [%s]\n",
 313                        prom_cpu_compatible);
 314                 sparc_cpu_type = "Unknown SUN4V CPU";
 315                 sparc_fpu_type = "Unknown SUN4V FPU";
 316                 break;
 317         }
 318 }
 319
 320 static int __init cpu_type_probe(void)
 321 {
 322         if (tlb_type == hypervisor) {
 323                 sun4v_cpu_probe();
 324         } else {
 325                 unsigned long ver;
 326                 int manuf, impl;
 327
 328                 __asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver));
 329
 330                 manuf = ((ver >> 48) & 0xffff);
 331                 impl = ((ver >> 32) & 0xffff);
 332                 set_cpu_and_fpu(manuf, impl, impl);
 333         }
 334         return 0;
 335 }
 336
 337 arch_initcall(cpu_type_probe);
 338 #endif