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/*
* What processor?
*
* Copyright 1995,1997 Morten Welinder
* Copyright 1997-1998 Marcus Meissner
*/
#include <ctype.h>
#include <string.h>
#include "winbase.h"
#include "wine/winbase16.h"
#include "wine/winestring.h"
#include "winreg.h"
#include "global.h"
#include "winnt.h"
#include "winerror.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(reg)
static BYTE PF[64] = {0,};
/***********************************************************************
* GetSystemInfo [KERNELL32.404]
*
* Gets the current system information.
*
* On the first call it reads 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().
*
* RETURNS
* nothing, really
*/
VOID WINAPI GetSystemInfo(
LPSYSTEM_INFO si /* [out] system information */
) {
static int cache = 0;
static SYSTEM_INFO cachedsi;
HKEY xhkey=0,hkey;
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 = VIRTUAL_GetPageSize();
/* FIXME: better values for the two entries below... */
cachedsi.lpMinimumApplicationAddress = (void *)0x40000000;
cachedsi.lpMaximumApplicationAddress = (void *)0x7FFFFFFF;
cachedsi.dwActiveProcessorMask = 1;
cachedsi.dwNumberOfProcessors = 1;
cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
cachedsi.dwAllocationGranularity = 0x10000;
cachedsi.wProcessorLevel = 3; /* 386 */
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? */
/* Create this registry key for all systems */
if (RegCreateKey16(HKEY_LOCAL_MACHINE,"HARDWARE\\DESCRIPTION\\System\\CentralProcessor",&hkey)!=ERROR_SUCCESS) {
WARN("Unable to register CPU information\n");
}
#ifdef linux
{
char buf[20];
char line[200];
FILE *f = fopen ("/proc/cpuinfo", "r");
if (!f)
return;
xhkey = 0;
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 (!lstrncmpiA(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: cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.wProcessorLevel= 5;
break;
case 6: cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.wProcessorLevel= 5;
break;
default:
break;
}
}
/* set the CPU type of the current processor */
sprintf(buf,"CPU %ld",cachedsi.dwProcessorType);
if (xhkey)
RegSetValueExA(xhkey,"Identifier",0,REG_SZ,buf,strlen(buf));
continue;
}
/* old 2.0 method */
if (!lstrncmpiA(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: cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.wProcessorLevel= 5;
break;
case 6: cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.wProcessorLevel= 5;
break;
default:
break;
}
}
/* set the CPU type of the current processor */
sprintf(buf,"CPU %ld",cachedsi.dwProcessorType);
if (xhkey)
RegSetValueExA(xhkey,"Identifier",0,REG_SZ,buf,strlen(buf));
continue;
}
if (!lstrncmpiA(line,"fdiv_bug",strlen("fdiv_bug"))) {
if (!lstrncmpiA(value,"yes",3))
PF[PF_FLOATING_POINT_PRECISION_ERRATA] = TRUE;
continue;
}
if (!lstrncmpiA(line,"fpu",strlen("fpu"))) {
if (!lstrncmpiA(value,"no",2))
PF[PF_FLOATING_POINT_EMULATED] = TRUE;
continue;
}
if (!lstrncmpiA(line,"processor",strlen("processor"))) {
/* processor number counts up...*/
int x;
if (sscanf(value,"%d",&x))
if (x+1>cachedsi.dwNumberOfProcessors)
cachedsi.dwNumberOfProcessors=x+1;
/* Create a new processor subkey on a multiprocessor
* system
*/
sprintf(buf,"%d",x);
if (xhkey)
RegCloseKey(xhkey);
RegCreateKey16(hkey,buf,&xhkey);
}
if (!lstrncmpiA(line,"stepping",strlen("stepping"))) {
int x;
if (sscanf(value,"%d",&x))
cachedsi.wProcessorRevision = x;
}
if (!lstrncmpiA(line,"flags",strlen("flags"))) {
if (strstr(value,"cx8"))
PF[PF_COMPARE_EXCHANGE_DOUBLE] = TRUE;
if (strstr(value,"mmx"))
PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
}
}
fclose (f);
}
memcpy(si,&cachedsi,sizeof(*si));
#else /* linux */
/* FIXME: how do we do this on other systems? */
RegCreateKey16(hkey,"0",&xhkey);
RegSetValueExA(xhkey,"Identifier",0,REG_SZ,"CPU 386",strlen("CPU 386"));
#endif /* !linux */
if (xhkey)
RegCloseKey(xhkey);
if (hkey)
RegCloseKey(hkey);
}
/***********************************************************************
* IsProcessorFeaturePresent [KERNELL32.880]
* RETURNS:
* TRUE if processorfeature 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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