misc/cpu.c

   1 /*
   2  * What processor?
   3  *
   4  * Copyright 1995,1997 Morten Welinder
   5  * Copyright 1997-1998 Marcus Meissner
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #ifdef HAVE_SYS_PARAM_H
  26 # include <sys/param.h>
  27 #endif
  28 #ifdef HAVE_SYS_SYSCTL_H
  29 # include <sys/sysctl.h>
  30 #endif
  31 #ifdef HAVE_MACHINE_CPU_H
  32 # include <machine/cpu.h>
  33 #endif
  34
  35 #include <ctype.h>
  36 #include <string.h>
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39
  40 #define NONAMELESSUNION
  41 #define NONAMELESSSTRUCT
  42 #include "winbase.h"
  43 #include "winnt.h"
  44 #include "winternl.h"
  45 #include "winerror.h"
  46 #include "wine/unicode.h"
  47 #include "wine/debug.h"
  48
  49 WINE_DEFAULT_DEBUG_CHANNEL(reg);
  50
  51 #define AUTH    0x68747541      /* "Auth" */
  52 #define ENTI    0x69746e65      /* "enti" */
  53 #define CAMD    0x444d4163      /* "cAMD" */
  54
  55 /* Calls cpuid with an eax of 'ax' and returns the 16 bytes in *p
  56  * We are compiled with -fPIC, so we can't clobber ebx.
  57  */
  58 static inline void do_cpuid(int ax, int *p)
  59 {
  60 #ifdef __i386__
  61         __asm__("pushl %%ebx\n\t"
  62                 "cpuid\n\t"
  63                 "movl %%ebx, %%esi\n\t"
  64                 "popl %%ebx"
  65                 : "=a" (p[0]), "=S" (p[1]), "=c" (p[2]), "=d" (p[3])
  66                 :  "0" (ax));
  67 #endif
  68 }
  69
  70 /* From xf86info havecpuid.c 1.11 */
  71 static inline int have_cpuid(void)
  72 {
  73 #ifdef __i386__
  74         unsigned int f1, f2;
  75         __asm__("pushfl\n\t"
  76                 "pushfl\n\t"
  77                 "popl %0\n\t"
  78                 "movl %0,%1\n\t"
  79                 "xorl %2,%0\n\t"
  80                 "pushl %0\n\t"
  81                 "popfl\n\t"
  82                 "pushfl\n\t"
  83                 "popl %0\n\t"
  84                 "popfl"
  85                 : "=&r" (f1), "=&r" (f2)
  86                 : "ir" (0x00200000));
  87         return ((f1^f2) & 0x00200000) != 0;
  88 #else
  89         return 0;
  90 #endif
  91 }
  92
  93 static BYTE PF[64] = {0,};
  94
  95 static void create_registry_keys( const SYSTEM_INFO *info )
  96 {
  97     static const WCHAR SystemW[] = {'M','a','c','h','i','n','e','\\',
  98                                     'H','a','r','d','w','a','r','e','\\',
  99                                     'D','e','s','c','r','i','p','t','i','o','n','\\',
 100                                     'S','y','s','t','e','m',0};
 101     static const WCHAR fpuW[] = {'F','l','o','a','t','i','n','g','P','o','i','n','t','P','r','o','c','e','s','s','o','r',0};
 102     static const WCHAR cpuW[] = {'C','e','n','t','r','a','l','P','r','o','c','e','s','s','o','r',0};
 103     static const WCHAR IdentifierW[] = {'I','d','e','n','t','i','f','i','e','r',0};
 104     static const WCHAR SysidW[] = {'A','T',' ','c','o','m','p','a','t','i','b','l','e',0};
 105
 106     int i;
 107     HKEY hkey, system_key, cpu_key;
 108     OBJECT_ATTRIBUTES attr;
 109     UNICODE_STRING nameW, valueW;
 110
 111     attr.Length = sizeof(attr);
 112     attr.RootDirectory = 0;
 113     attr.ObjectName = &nameW;
 114     attr.Attributes = 0;
 115     attr.SecurityDescriptor = NULL;
 116     attr.SecurityQualityOfService = NULL;
 117
 118     RtlInitUnicodeString( &nameW, SystemW );
 119     if (NtCreateKey( &system_key, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL )) return;
 120
 121     RtlInitUnicodeString( &valueW, IdentifierW );
 122     NtSetValueKey( system_key, &valueW, 0, REG_SZ, SysidW, (strlenW(SysidW)+1) * sizeof(WCHAR) );
 123
 124     attr.RootDirectory = system_key;
 125     RtlInitUnicodeString( &nameW, fpuW );
 126     if (!NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL )) NtClose( hkey );
 127
 128     RtlInitUnicodeString( &nameW, cpuW );
 129     if (!NtCreateKey( &cpu_key, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ))
 130     {
 131         for (i = 0; i < info->dwNumberOfProcessors; i++)
 132         {
 133             char num[10], id[20];
 134
 135             attr.RootDirectory = cpu_key;
 136             sprintf( num, "%d", i );
 137             RtlCreateUnicodeStringFromAsciiz( &nameW, num );
 138             if (!NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ))
 139             {
 140                 WCHAR idW[20];
 141
 142                 sprintf( id, "CPU %ld", info->dwProcessorType );
 143                 RtlMultiByteToUnicodeN( idW, sizeof(idW), NULL, id, strlen(id)+1 );
 144                 NtSetValueKey( hkey, &valueW, 0, REG_SZ, idW, (strlenW(idW)+1)*sizeof(WCHAR) );
 145                 NtClose( hkey );
 146             }
 147             RtlFreeUnicodeString( &nameW );
 148         }
 149         NtClose( cpu_key );
 150     }
 151     NtClose( system_key );
 152 }
 153
 154
 155 /***********************************************************************
 156  *                      GetSystemInfo                   [KERNEL32.@]
 157  *
 158  * Gets the current system information.
 159  *
 160  * On the first call it creates cached values, so it doesn't have to determine
 161  * them repeatedly. On Linux, the /proc/cpuinfo special file is used.
 162  *
 163  * It creates a registry subhierarchy, looking like:
 164  * \HARDWARE\DESCRIPTION\System\CentralProcessor\<processornumber>\
 165  *                                                      Identifier (CPU x86)
 166  * Note that there is a hierarchy for every processor installed, so this
 167  * supports multiprocessor systems. This is done like Win95 does it, I think.
 168  *
 169  * It also creates a cached flag array for IsProcessorFeaturePresent().
 170  *
 171  * No NULL ptr check for LPSYSTEM_INFO in Win9x.
 172  *
 173  * RETURNS
 174  *      nothing, really
 175  */
 176 VOID WINAPI GetSystemInfo(
 177         LPSYSTEM_INFO si        /* [out] system information */
 178 ) {
 179         static int cache = 0;
 180         static SYSTEM_INFO cachedsi;
 181
 182         if (cache) {
 183                 memcpy(si,&cachedsi,sizeof(*si));
 184                 return;
 185         }
 186         memset(PF,0,sizeof(PF));
 187
 188         /* choose sensible defaults ...
 189          * FIXME: perhaps overrideable with precompiler flags?
 190          */
 191         cachedsi.u.s.wProcessorArchitecture     = PROCESSOR_ARCHITECTURE_INTEL;
 192         cachedsi.dwPageSize                     = getpagesize();
 193
 194         /* FIXME: the two entries below should be computed somehow... */
 195         cachedsi.lpMinimumApplicationAddress    = (void *)0x00010000;
 196         cachedsi.lpMaximumApplicationAddress    = (void *)0x7FFFFFFF;
 197         cachedsi.dwActiveProcessorMask          = 1;
 198         cachedsi.dwNumberOfProcessors           = 1;
 199         cachedsi.dwProcessorType                = PROCESSOR_INTEL_PENTIUM;
 200         cachedsi.dwAllocationGranularity        = 0x10000;
 201         cachedsi.wProcessorLevel                = 5; /* 586 */
 202         cachedsi.wProcessorRevision             = 0;
 203
 204         cache = 1; /* even if there is no more info, we now have a cacheentry */
 205         memcpy(si,&cachedsi,sizeof(*si));
 206
 207         /* Hmm, reasonable processor feature defaults? */
 208
 209 #ifdef linux
 210         {
 211         char line[200];
 212         FILE *f = fopen ("/proc/cpuinfo", "r");
 213
 214         if (!f)
 215                 return;
 216         while (fgets(line,200,f)!=NULL) {
 217                 char    *s,*value;
 218
 219                 /* NOTE: the ':' is the only character we can rely on */
 220                 if (!(value = strchr(line,':')))
 221                         continue;
 222                 /* terminate the valuename */
 223                 *value++ = '\0';
 224                 /* skip any leading spaces */
 225                 while (*value==' ') value++;
 226                 if ((s=strchr(value,'\n')))
 227                         *s='\0';
 228
 229                 /* 2.1 method */
 230                 if (!strncasecmp(line, "cpu family",strlen("cpu family"))) {
 231                         if (isdigit (value[0])) {
 232                                 switch (value[0] - '0') {
 233                                 case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
 234                                         cachedsi.wProcessorLevel= 3;
 235                                         break;
 236                                 case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
 237                                         cachedsi.wProcessorLevel= 4;
 238                                         break;
 239                                 case 5:
 240                                 case 6: /* PPro/2/3 has same info as P1 */
 241                                         cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 242                                         cachedsi.wProcessorLevel= 5;
 243                                         break;
 244                                 case 1: /* two-figure levels */
 245                                     if (value[1] == '5')
 246                                     {
 247                                         cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 248                                         cachedsi.wProcessorLevel= 5;
 249                                         break;
 250                                     }
 251                                     /* fall through */
 252                                 default:
 253                                         FIXME("unknown cpu family '%s', please report ! (-> setting to 386)\n", value);
 254                                         break;
 255                                 }
 256                         }
 257                         continue;
 258                 }
 259                 /* old 2.0 method */
 260                 if (!strncasecmp(line, "cpu",strlen("cpu"))) {
 261                         if (    isdigit (value[0]) && value[1] == '8' &&
 262                                 value[2] == '6' && value[3] == 0
 263                         ) {
 264                                 switch (value[0] - '0') {
 265                                 case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
 266                                         cachedsi.wProcessorLevel= 3;
 267                                         break;
 268                                 case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
 269                                         cachedsi.wProcessorLevel= 4;
 270                                         break;
 271                                 case 5:
 272                                 case 6: /* PPro/2/3 has same info as P1 */
 273                                         cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 274                                         cachedsi.wProcessorLevel= 5;
 275                                         break;
 276                                 default:
 277                                         FIXME("unknown Linux 2.0 cpu family '%s', please report ! (-> setting to 386)\n", value);
 278                                         break;
 279                                 }
 280                         }
 281                         continue;
 282                 }
 283                 if (!strncasecmp(line,"fdiv_bug",strlen("fdiv_bug"))) {
 284                         if (!strncasecmp(value,"yes",3))
 285                                 PF[PF_FLOATING_POINT_PRECISION_ERRATA] = TRUE;
 286
 287                         continue;
 288                 }
 289                 if (!strncasecmp(line,"fpu",strlen("fpu"))) {
 290                         if (!strncasecmp(value,"no",2))
 291                                 PF[PF_FLOATING_POINT_EMULATED] = TRUE;
 292
 293                         continue;
 294                 }
 295                 if (!strncasecmp(line,"processor",strlen("processor"))) {
 296                         /* processor number counts up... */
 297                         unsigned int x;
 298
 299                         if (sscanf(value,"%d",&x))
 300                                 if (x+1>cachedsi.dwNumberOfProcessors)
 301                                         cachedsi.dwNumberOfProcessors=x+1;
 302                 }
 303                 if (!strncasecmp(line,"stepping",strlen("stepping"))) {
 304                         int     x;
 305
 306                         if (sscanf(value,"%d",&x))
 307                                 cachedsi.wProcessorRevision = x;
 308                 }
 309                 if (    !strncasecmp(line,"flags",strlen("flags"))      ||
 310                         !strncasecmp(line,"features",strlen("features"))
 311                 ) {
 312                         if (strstr(value,"cx8"))
 313                                 PF[PF_COMPARE_EXCHANGE_DOUBLE] = TRUE;
 314                         if (strstr(value,"mmx"))
 315                                 PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
 316                         if (strstr(value,"tsc"))
 317                                 PF[PF_RDTSC_INSTRUCTION_AVAILABLE] = TRUE;
 318
 319                 }
 320         }
 321         fclose (f);
 322         }
 323         memcpy(si,&cachedsi,sizeof(*si));
 324 #elif defined (__NetBSD__)
 325         {
 326              int mib[2];
 327              int value[2];
 328              char model[256];
 329              char *cpuclass;
 330              FILE *f = fopen ("/var/run/dmesg.boot", "r");
 331
 332              /* first deduce as much as possible from the sysctls */
 333              mib[0] = CTL_MACHDEP;
 334 #ifdef CPU_FPU_PRESENT
 335              mib[1] = CPU_FPU_PRESENT;
 336              value[1] = sizeof(int);
 337              if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
 338                  if (value) PF[PF_FLOATING_POINT_EMULATED] = FALSE;
 339                  else       PF[PF_FLOATING_POINT_EMULATED] = TRUE;
 340 #endif
 341 #ifdef CPU_SSE
 342              mib[1] = CPU_SSE;   /* this should imply MMX */
 343              value[1] = sizeof(int);
 344              if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
 345                  if (value) PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
 346 #endif
 347 #ifdef CPU_SSE2
 348              mib[1] = CPU_SSE2;  /* this should imply MMX */
 349              value[1] = sizeof(int);
 350              if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
 351                  if (value) PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
 352 #endif
 353              mib[0] = CTL_HW;
 354              mib[1] = HW_NCPU;
 355              value[1] = sizeof(int);
 356              if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
 357                  if (value[0] > cachedsi.dwNumberOfProcessors)
 358                     cachedsi.dwNumberOfProcessors = value[0];
 359              mib[1] = HW_MODEL;
 360              value[1] = 255;
 361              if (sysctl(mib, 2, model, value+1, NULL, 0) >= 0) {
 362                   model[value[1]] = '\0'; /* just in case */
 363                   cpuclass = strstr(model, "-class");
 364                   if (cpuclass != NULL) {
 365                        while(cpuclass > model && cpuclass[0] != '(') cpuclass--;
 366                        if (!strncmp(cpuclass+1, "386", 3)) {
 367                             cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
 368                             cachedsi.wProcessorLevel= 3;
 369                        }
 370                        if (!strncmp(cpuclass+1, "486", 3)) {
 371                             cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
 372                             cachedsi.wProcessorLevel= 4;
 373                        }
 374                        if (!strncmp(cpuclass+1, "586", 3)) {
 375                             cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 376                             cachedsi.wProcessorLevel= 5;
 377                        }
 378                        if (!strncmp(cpuclass+1, "686", 3)) {
 379                             cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 380                             cachedsi.wProcessorLevel= 5;
 381                             /* this should imply MMX */
 382                             PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
 383                        }
 384                   }
 385              }
 386
 387              /* it may be worth reading from /var/run/dmesg.boot for
 388                 additional information such as CX8, MMX and TSC
 389                 (however this information should be considered less
 390                  reliable than that from the sysctl calls) */
 391              if (f != NULL)
 392              {
 393                  while (fgets(model, 255, f) != NULL) {
 394                         if (sscanf(model,"cpu%d: features %x<", value, value+1) == 2) {
 395                             /* we could scan the string but it is easier
 396                                to test the bits directly */
 397                             if (value[1] & 0x1)
 398                                 PF[PF_FLOATING_POINT_EMULATED] = TRUE;
 399                             if (value[1] & 0x10)
 400                                 PF[PF_RDTSC_INSTRUCTION_AVAILABLE] = TRUE;
 401                             if (value[1] & 0x100)
 402                                 PF[PF_COMPARE_EXCHANGE_DOUBLE] = TRUE;
 403                             if (value[1] & 0x800000)
 404                                 PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
 405
 406                             break;
 407                         }
 408                  }
 409                  fclose(f);
 410              }
 411
 412         }
 413         memcpy(si,&cachedsi,sizeof(*si));
 414 #elif defined(__FreeBSD__)
 415         {
 416         unsigned int regs[4], regs2[4];
 417         int ret, len, num;
 418         if (!have_cpuid())
 419                 regs[0] = 0;                    /* No cpuid support -- skip the rest */
 420         else
 421                 do_cpuid(0x00000000, regs);     /* get standard cpuid level and vendor name */
 422         if (regs[0]>=0x00000001) {              /* Check for supported cpuid version */
 423                 do_cpuid(0x00000001, regs2);    /* get cpu features */
 424                 switch ((regs2[0] >> 8)&0xf) {  /* cpu family */
 425                 case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
 426                         cachedsi.wProcessorLevel = 3;
 427                         break;
 428                 case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
 429                         cachedsi.wProcessorLevel = 4;
 430                         break;
 431                 case 5:
 432                 case 6: /* PPro/2/3 has same info as P1 */
 433                         cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 434                         cachedsi.wProcessorLevel = 5;
 435                         break;
 436                 default:
 437                         FIXME("unknown cpu family %d, please report! (-> setting to 386)\n", \
 438                                 (regs2[0] >> 8)&0xf);
 439                         break;
 440                 }
 441                 PF[PF_FLOATING_POINT_EMULATED]     = !(regs2[3] & 1);
 442                 PF[PF_RDTSC_INSTRUCTION_AVAILABLE] = (regs2[3] & (1 << 4 )) >> 4;
 443                 PF[PF_COMPARE_EXCHANGE_DOUBLE]     = (regs2[3] & (1 << 8 )) >> 8;
 444                 PF[PF_MMX_INSTRUCTIONS_AVAILABLE]  = (regs2[3] & (1 << 23)) >> 23;
 445                 /* Check for OS support of SSE -- Is this used, and should it be sse1 or sse2? */
 446                 /*len = sizeof(num);
 447                 ret = sysctlbyname("hw.instruction_sse", &num, &len, NULL, 0);
 448                 if (!ret)
 449                         PF[PF_XMMI_INSTRUCTIONS_AVAILABLE] = num;*/
 450
 451                 if (regs[1] == AUTH &&
 452                     regs[3] == ENTI &&
 453                     regs[2] == CAMD) {
 454                         do_cpuid(0x80000000, regs);             /* get vendor cpuid level */
 455                         if (regs[0]>=0x80000001) {
 456                                 do_cpuid(0x80000001, regs2);    /* get vendor features */
 457                                 PF[PF_AMD3D_INSTRUCTIONS_AVAILABLE] =
 458                                     (regs2[3] & (1 << 31 )) >> 31;
 459                         }
 460                 }
 461         }
 462         len = sizeof(num);
 463         ret = sysctlbyname("hw.ncpu", &num, &len, NULL, 0);
 464         if (!ret)
 465                 cachedsi.dwNumberOfProcessors = num;
 466         }
 467         memcpy(si,&cachedsi,sizeof(*si));
 468 #else
 469         FIXME("not yet supported on this system\n");
 470 #endif
 471         TRACE("<- CPU arch %d, res'd %d, pagesize %ld, minappaddr %p, maxappaddr %p,"
 472               " act.cpumask %08lx, numcpus %ld, CPU type %ld, allocgran. %ld, CPU level %d, CPU rev %d\n",
 473               si->u.s.wProcessorArchitecture, si->u.s.wReserved, si->dwPageSize,
 474               si->lpMinimumApplicationAddress, si->lpMaximumApplicationAddress,
 475               si->dwActiveProcessorMask, si->dwNumberOfProcessors, si->dwProcessorType,
 476               si->dwAllocationGranularity, si->wProcessorLevel, si->wProcessorRevision);
 477
 478         create_registry_keys( &cachedsi );
 479 }
 480
 481
 482 /***********************************************************************
 483  *                      IsProcessorFeaturePresent       [KERNEL32.@]
 484  * RETURNS:
 485  *      TRUE if processor feature present
 486  *      FALSE otherwise
 487  */
 488 BOOL WINAPI IsProcessorFeaturePresent (
 489         DWORD feature   /* [in] feature number, see PF_ defines */
 490 ) {
 491   SYSTEM_INFO si;
 492   GetSystemInfo (&si); /* To ensure the information is loaded and cached */
 493
 494   if (feature < 64)
 495     return PF[feature];
 496   else
 497     return FALSE;
 498 }