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