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