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wine/misc/cpu.c

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/*
* What processor?
*
* Copyright 1995,1997 Morten Welinder
* Copyright 1997-1998 Marcus Meissner
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <ctype.h>
#include <string.h>
#include <stdio.h>
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "winbase.h"
#include "winnt.h"
#include "winternl.h"
#include "winerror.h"
#include "wine/unicode.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(reg);
static BYTE PF[64] = {0,};
static void create_registry_keys( const SYSTEM_INFO *info )
{
static const WCHAR SystemW[] = {'M','a','c','h','i','n','e','\\',
'H','a','r','d','w','a','r','e','\\',
'D','e','s','c','r','i','p','t','i','o','n','\\',
'S','y','s','t','e','m',0};
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};
static const WCHAR cpuW[] = {'C','e','n','t','r','a','l','P','r','o','c','e','s','s','o','r',0};
static const WCHAR IdentifierW[] = {'I','d','e','n','t','i','f','i','e','r',0};
static const WCHAR SysidW[] = {'A','T',' ','c','o','m','p','a','t','i','b','l','e',0};
int i;
HKEY hkey, system_key, cpu_key;
OBJECT_ATTRIBUTES attr;
UNICODE_STRING nameW, valueW;
attr.Length = sizeof(attr);
attr.RootDirectory = 0;
attr.ObjectName = &nameW;
attr.Attributes = 0;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
RtlInitUnicodeString( &nameW, SystemW );
if (NtCreateKey( &system_key, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL )) return;
RtlInitUnicodeString( &valueW, IdentifierW );
NtSetValueKey( system_key, &valueW, 0, REG_SZ, SysidW, (strlenW(SysidW)+1) * sizeof(WCHAR) );
attr.RootDirectory = system_key;
RtlInitUnicodeString( &nameW, fpuW );
if (!NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL )) NtClose( hkey );
RtlInitUnicodeString( &nameW, cpuW );
if (!NtCreateKey( &cpu_key, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ))
{
for (i = 0; i < info->dwNumberOfProcessors; i++)
{
char num[10], id[20];
attr.RootDirectory = cpu_key;
sprintf( num, "%d", i );
RtlCreateUnicodeStringFromAsciiz( &nameW, num );
if (!NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ))
{
WCHAR idW[20];
sprintf( id, "CPU %ld", info->dwProcessorType );
RtlMultiByteToUnicodeN( idW, sizeof(idW), NULL, id, strlen(id)+1 );
NtSetValueKey( hkey, &valueW, 0, REG_SZ, idW, (strlenW(idW)+1)*sizeof(WCHAR) );
NtClose( hkey );
}
RtlFreeUnicodeString( &nameW );
}
NtClose( cpu_key );
}
NtClose( system_key );
}
/***********************************************************************
* GetSystemInfo [KERNEL32.@]
*
* Gets the current system information.
*
* On the first call it creates cached values, so it doesn't have to determine
* them repeatedly. On Linux, the /proc/cpuinfo special file is used.
*
* It creates a registry subhierarchy, looking like:
* \HARDWARE\DESCRIPTION\System\CentralProcessor\<processornumber>\
* Identifier (CPU x86)
* Note that there is a hierarchy for every processor installed, so this
* supports multiprocessor systems. This is done like Win95 does it, I think.
*
* It also creates a cached flag array for IsProcessorFeaturePresent().
*
* No NULL ptr check for LPSYSTEM_INFO in Win9x.
*
* RETURNS
* nothing, really
*/
VOID WINAPI GetSystemInfo(
LPSYSTEM_INFO si /* [out] system information */
) {
static int cache = 0;
static SYSTEM_INFO cachedsi;
if (cache) {
memcpy(si,&cachedsi,sizeof(*si));
return;
}
memset(PF,0,sizeof(PF));
/* choose sensible defaults ...
* FIXME: perhaps overrideable with precompiler flags?
*/
cachedsi.u.s.wProcessorArchitecture = PROCESSOR_ARCHITECTURE_INTEL;
cachedsi.dwPageSize = getpagesize();
/* FIXME: the two entries below should be computed somehow... */
cachedsi.lpMinimumApplicationAddress = (void *)0x00010000;
cachedsi.lpMaximumApplicationAddress = (void *)0x7FFFFFFF;
cachedsi.dwActiveProcessorMask = 1;
cachedsi.dwNumberOfProcessors = 1;
cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.dwAllocationGranularity = 0x10000;
cachedsi.wProcessorLevel = 5; /* 586 */
cachedsi.wProcessorRevision = 0;
cache = 1; /* even if there is no more info, we now have a cacheentry */
memcpy(si,&cachedsi,sizeof(*si));
/* Hmm, reasonable processor feature defaults? */
#ifdef linux
{
char line[200];
FILE *f = fopen ("/proc/cpuinfo", "r");
if (!f)
return;
while (fgets(line,200,f)!=NULL) {
char *s,*value;
/* NOTE: the ':' is the only character we can rely on */
if (!(value = strchr(line,':')))
continue;
/* terminate the valuename */
*value++ = '\0';
/* skip any leading spaces */
while (*value==' ') value++;
if ((s=strchr(value,'\n')))
*s='\0';
/* 2.1 method */
if (!strncasecmp(line, "cpu family",strlen("cpu family"))) {
if (isdigit (value[0])) {
switch (value[0] - '0') {
case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
cachedsi.wProcessorLevel= 3;
break;
case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
cachedsi.wProcessorLevel= 4;
break;
case 5:
case 6: /* PPro/2/3 has same info as P1 */
cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.wProcessorLevel= 5;
break;
case 1: /* two-figure levels */
if (value[1] == '5')
{
cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.wProcessorLevel= 5;
break;
}
/* fall through */
default:
FIXME("unknown cpu family '%s', please report ! (-> setting to 386)\n", value);
break;
}
}
continue;
}
/* old 2.0 method */
if (!strncasecmp(line, "cpu",strlen("cpu"))) {
if ( isdigit (value[0]) && value[1] == '8' &&
value[2] == '6' && value[3] == 0
) {
switch (value[0] - '0') {
case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
cachedsi.wProcessorLevel= 3;
break;
case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
cachedsi.wProcessorLevel= 4;
break;
case 5:
case 6: /* PPro/2/3 has same info as P1 */
cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.wProcessorLevel= 5;
break;
default:
FIXME("unknown Linux 2.0 cpu family '%s', please report ! (-> setting to 386)\n", value);
break;
}
}
continue;
}
if (!strncasecmp(line,"fdiv_bug",strlen("fdiv_bug"))) {
if (!strncasecmp(value,"yes",3))
PF[PF_FLOATING_POINT_PRECISION_ERRATA] = TRUE;
continue;
}
if (!strncasecmp(line,"fpu",strlen("fpu"))) {
if (!strncasecmp(value,"no",2))
PF[PF_FLOATING_POINT_EMULATED] = TRUE;
continue;
}
if (!strncasecmp(line,"processor",strlen("processor"))) {
/* processor number counts up... */
unsigned int x;
if (sscanf(value,"%d",&x))
if (x+1>cachedsi.dwNumberOfProcessors)
cachedsi.dwNumberOfProcessors=x+1;
}
if (!strncasecmp(line,"stepping",strlen("stepping"))) {
int x;
if (sscanf(value,"%d",&x))
cachedsi.wProcessorRevision = x;
}
if ( !strncasecmp(line,"flags",strlen("flags")) ||
!strncasecmp(line,"features",strlen("features"))
) {
if (strstr(value,"cx8"))
PF[PF_COMPARE_EXCHANGE_DOUBLE] = TRUE;
if (strstr(value,"mmx"))
PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
if (strstr(value,"tsc"))
PF[PF_RDTSC_INSTRUCTION_AVAILABLE] = TRUE;
}
}
fclose (f);
}
memcpy(si,&cachedsi,sizeof(*si));
#else /* linux */
FIXME("not yet supported on this system\n");
#endif /* !linux */
TRACE("<- CPU arch %d, res'd %d, pagesize %ld, minappaddr %p, maxappaddr %p,"
" act.cpumask %08lx, numcpus %ld, CPU type %ld, allocgran. %ld, CPU level %d, CPU rev %d\n",
si->u.s.wProcessorArchitecture, si->u.s.wReserved, si->dwPageSize,
si->lpMinimumApplicationAddress, si->lpMaximumApplicationAddress,
si->dwActiveProcessorMask, si->dwNumberOfProcessors, si->dwProcessorType,
si->dwAllocationGranularity, si->wProcessorLevel, si->wProcessorRevision);
create_registry_keys( &cachedsi );
}
/***********************************************************************
* IsProcessorFeaturePresent [KERNEL32.@]
* RETURNS:
* TRUE if processor feature present
* FALSE otherwise
*/
BOOL WINAPI IsProcessorFeaturePresent (
DWORD feature /* [in] feature number, see PF_ defines */
) {
SYSTEM_INFO si;
GetSystemInfo (&si); /* To ensure the information is loaded and cached */
if (feature < 64)
return PF[feature];
else
return FALSE;
}
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