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 #include <ctype.h>
  26 #include <string.h>
  27 #include <stdio.h>
  28
  29 #define NONAMELESSUNION
  30 #define NONAMELESSSTRUCT
  31 #include "winbase.h"
  32 #include "winnt.h"
  33 #include "winternl.h"
  34 #include "winerror.h"
  35 #include "wine/unicode.h"
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(reg);
  39
  40 static BYTE PF[64] = {0,};
  41
  42 static void create_registry_keys( const SYSTEM_INFO *info )
  43 {
  44     static const WCHAR SystemW[] = {'M','a','c','h','i','n','e','\\',
  45                                     'H','a','r','d','w','a','r','e','\\',
  46                                     'D','e','s','c','r','i','p','t','i','o','n','\\',
  47                                     'S','y','s','t','e','m',0};
  48     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};
  49     static const WCHAR cpuW[] = {'C','e','n','t','r','a','l','P','r','o','c','e','s','s','o','r',0};
  50     static const WCHAR IdentifierW[] = {'I','d','e','n','t','i','f','i','e','r',0};
  51     static const WCHAR SysidW[] = {'A','T',' ','c','o','m','p','a','t','i','b','l','e',0};
  52
  53     int i;
  54     HKEY hkey, system_key, cpu_key;
  55     OBJECT_ATTRIBUTES attr;
  56     UNICODE_STRING nameW, valueW;
  57
  58     attr.Length = sizeof(attr);
  59     attr.RootDirectory = 0;
  60     attr.ObjectName = &nameW;
  61     attr.Attributes = 0;
  62     attr.SecurityDescriptor = NULL;
  63     attr.SecurityQualityOfService = NULL;
  64
  65     RtlInitUnicodeString( &nameW, SystemW );
  66     if (NtCreateKey( &system_key, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL )) return;
  67
  68     RtlInitUnicodeString( &valueW, IdentifierW );
  69     NtSetValueKey( system_key, &valueW, 0, REG_SZ, SysidW, (strlenW(SysidW)+1) * sizeof(WCHAR) );
  70
  71     attr.RootDirectory = system_key;
  72     RtlInitUnicodeString( &nameW, fpuW );
  73     if (!NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL )) NtClose( hkey );
  74
  75     RtlInitUnicodeString( &nameW, cpuW );
  76     if (!NtCreateKey( &cpu_key, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ))
  77     {
  78         for (i = 0; i < info->dwNumberOfProcessors; i++)
  79         {
  80             char num[10], id[20];
  81
  82             attr.RootDirectory = cpu_key;
  83             sprintf( num, "%d", i );
  84             RtlCreateUnicodeStringFromAsciiz( &nameW, num );
  85             if (!NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ))
  86             {
  87                 WCHAR idW[20];
  88
  89                 sprintf( id, "CPU %ld", info->dwProcessorType );
  90                 RtlMultiByteToUnicodeN( idW, sizeof(idW), NULL, id, strlen(id)+1 );
  91                 NtSetValueKey( hkey, &valueW, 0, REG_SZ, idW, (strlenW(idW)+1)*sizeof(WCHAR) );
  92                 NtClose( hkey );
  93             }
  94             RtlFreeUnicodeString( &nameW );
  95         }
  96         NtClose( cpu_key );
  97     }
  98     NtClose( system_key );
  99 }
 100
 101
 102 /***********************************************************************
 103  *                      GetSystemInfo                   [KERNEL32.@]
 104  *
 105  * Gets the current system information.
 106  *
 107  * On the first call it creates cached values, so it doesn't have to determine
 108  * them repeatedly. On Linux, the /proc/cpuinfo special file is used.
 109  *
 110  * It creates a registry subhierarchy, looking like:
 111  * \HARDWARE\DESCRIPTION\System\CentralProcessor\<processornumber>\
 112  *                                                      Identifier (CPU x86)
 113  * Note that there is a hierarchy for every processor installed, so this
 114  * supports multiprocessor systems. This is done like Win95 does it, I think.
 115  *
 116  * It also creates a cached flag array for IsProcessorFeaturePresent().
 117  *
 118  * No NULL ptr check for LPSYSTEM_INFO in Win9x.
 119  *
 120  * RETURNS
 121  *      nothing, really
 122  */
 123 VOID WINAPI GetSystemInfo(
 124         LPSYSTEM_INFO si        /* [out] system information */
 125 ) {
 126         static int cache = 0;
 127         static SYSTEM_INFO cachedsi;
 128
 129         if (cache) {
 130                 memcpy(si,&cachedsi,sizeof(*si));
 131                 return;
 132         }
 133         memset(PF,0,sizeof(PF));
 134
 135         /* choose sensible defaults ...
 136          * FIXME: perhaps overrideable with precompiler flags?
 137          */
 138         cachedsi.u.s.wProcessorArchitecture     = PROCESSOR_ARCHITECTURE_INTEL;
 139         cachedsi.dwPageSize                     = getpagesize();
 140
 141         /* FIXME: the two entries below should be computed somehow... */
 142         cachedsi.lpMinimumApplicationAddress    = (void *)0x00010000;
 143         cachedsi.lpMaximumApplicationAddress    = (void *)0x7FFFFFFF;
 144         cachedsi.dwActiveProcessorMask          = 1;
 145         cachedsi.dwNumberOfProcessors           = 1;
 146         cachedsi.dwProcessorType                = PROCESSOR_INTEL_PENTIUM;
 147         cachedsi.dwAllocationGranularity        = 0x10000;
 148         cachedsi.wProcessorLevel                = 5; /* 586 */
 149         cachedsi.wProcessorRevision             = 0;
 150
 151         cache = 1; /* even if there is no more info, we now have a cacheentry */
 152         memcpy(si,&cachedsi,sizeof(*si));
 153
 154         /* Hmm, reasonable processor feature defaults? */
 155
 156 #ifdef linux
 157         {
 158         char line[200];
 159         FILE *f = fopen ("/proc/cpuinfo", "r");
 160
 161         if (!f)
 162                 return;
 163         while (fgets(line,200,f)!=NULL) {
 164                 char    *s,*value;
 165
 166                 /* NOTE: the ':' is the only character we can rely on */
 167                 if (!(value = strchr(line,':')))
 168                         continue;
 169                 /* terminate the valuename */
 170                 *value++ = '\0';
 171                 /* skip any leading spaces */
 172                 while (*value==' ') value++;
 173                 if ((s=strchr(value,'\n')))
 174                         *s='\0';
 175
 176                 /* 2.1 method */
 177                 if (!strncasecmp(line, "cpu family",strlen("cpu family"))) {
 178                         if (isdigit (value[0])) {
 179                                 switch (value[0] - '0') {
 180                                 case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
 181                                         cachedsi.wProcessorLevel= 3;
 182                                         break;
 183                                 case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
 184                                         cachedsi.wProcessorLevel= 4;
 185                                         break;
 186                                 case 5:
 187                                 case 6: /* PPro/2/3 has same info as P1 */
 188                                         cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 189                                         cachedsi.wProcessorLevel= 5;
 190                                         break;
 191                                 case 1: /* two-figure levels */
 192                                     if (value[1] == '5')
 193                                     {
 194                                         cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 195                                         cachedsi.wProcessorLevel= 5;
 196                                         break;
 197                                     }
 198                                     /* fall through */
 199                                 default:
 200                                         FIXME("unknown cpu family '%s', please report ! (-> setting to 386)\n", value);
 201                                         break;
 202                                 }
 203                         }
 204                         continue;
 205                 }
 206                 /* old 2.0 method */
 207                 if (!strncasecmp(line, "cpu",strlen("cpu"))) {
 208                         if (    isdigit (value[0]) && value[1] == '8' &&
 209                                 value[2] == '6' && value[3] == 0
 210                         ) {
 211                                 switch (value[0] - '0') {
 212                                 case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
 213                                         cachedsi.wProcessorLevel= 3;
 214                                         break;
 215                                 case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
 216                                         cachedsi.wProcessorLevel= 4;
 217                                         break;
 218                                 case 5:
 219                                 case 6: /* PPro/2/3 has same info as P1 */
 220                                         cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 221                                         cachedsi.wProcessorLevel= 5;
 222                                         break;
 223                                 default:
 224                                         FIXME("unknown Linux 2.0 cpu family '%s', please report ! (-> setting to 386)\n", value);
 225                                         break;
 226                                 }
 227                         }
 228                         continue;
 229                 }
 230                 if (!strncasecmp(line,"fdiv_bug",strlen("fdiv_bug"))) {
 231                         if (!strncasecmp(value,"yes",3))
 232                                 PF[PF_FLOATING_POINT_PRECISION_ERRATA] = TRUE;
 233
 234                         continue;
 235                 }
 236                 if (!strncasecmp(line,"fpu",strlen("fpu"))) {
 237                         if (!strncasecmp(value,"no",2))
 238                                 PF[PF_FLOATING_POINT_EMULATED] = TRUE;
 239
 240                         continue;
 241                 }
 242                 if (!strncasecmp(line,"processor",strlen("processor"))) {
 243                         /* processor number counts up... */
 244                         unsigned int x;
 245
 246                         if (sscanf(value,"%d",&x))
 247                                 if (x+1>cachedsi.dwNumberOfProcessors)
 248                                         cachedsi.dwNumberOfProcessors=x+1;
 249                 }
 250                 if (!strncasecmp(line,"stepping",strlen("stepping"))) {
 251                         int     x;
 252
 253                         if (sscanf(value,"%d",&x))
 254                                 cachedsi.wProcessorRevision = x;
 255                 }
 256                 if (    !strncasecmp(line,"flags",strlen("flags"))      ||
 257                         !strncasecmp(line,"features",strlen("features"))
 258                 ) {
 259                         if (strstr(value,"cx8"))
 260                                 PF[PF_COMPARE_EXCHANGE_DOUBLE] = TRUE;
 261                         if (strstr(value,"mmx"))
 262                                 PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
 263                         if (strstr(value,"tsc"))
 264                                 PF[PF_RDTSC_INSTRUCTION_AVAILABLE] = TRUE;
 265
 266                 }
 267         }
 268         fclose (f);
 269         }
 270         memcpy(si,&cachedsi,sizeof(*si));
 271 #else  /* linux */
 272         FIXME("not yet supported on this system\n");
 273 #endif  /* !linux */
 274         TRACE("<- CPU arch %d, res'd %d, pagesize %ld, minappaddr %p, maxappaddr %p,"
 275               " act.cpumask %08lx, numcpus %ld, CPU type %ld, allocgran. %ld, CPU level %d, CPU rev %d\n",
 276               si->u.s.wProcessorArchitecture, si->u.s.wReserved, si->dwPageSize,
 277               si->lpMinimumApplicationAddress, si->lpMaximumApplicationAddress,
 278               si->dwActiveProcessorMask, si->dwNumberOfProcessors, si->dwProcessorType,
 279               si->dwAllocationGranularity, si->wProcessorLevel, si->wProcessorRevision);
 280
 281         create_registry_keys( &cachedsi );
 282 }
 283
 284
 285 /***********************************************************************
 286  *                      IsProcessorFeaturePresent       [KERNEL32.@]
 287  * RETURNS:
 288  *      TRUE if processor feature present
 289  *      FALSE otherwise
 290  */
 291 BOOL WINAPI IsProcessorFeaturePresent (
 292         DWORD feature   /* [in] feature number, see PF_ defines */
 293 ) {
 294   SYSTEM_INFO si;
 295   GetSystemInfo (&si); /* To ensure the information is loaded and cached */
 296
 297   if (feature < 64)
 298     return PF[feature];
 299   else
 300     return FALSE;
 301 }