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255 lines
7.2 KiB
C
255 lines
7.2 KiB
C
/*
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* What processor?
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*
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* Copyright 1995,1997 Morten Welinder
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* Copyright 1997-1998 Marcus Meissner
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <ctype.h>
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#include <string.h>
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#include <stdio.h>
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#include "winbase.h"
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#include "winreg.h"
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#include "winnt.h"
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#include "winerror.h"
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#include "debugtools.h"
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DEFAULT_DEBUG_CHANNEL(reg);
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static BYTE PF[64] = {0,};
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/***********************************************************************
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* GetSystemInfo [KERNEL32.@]
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*
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* Gets the current system information.
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*
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* On the first call it creates cached values, so it doesn't have to determine
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* them repeatedly. On Linux, the /proc/cpuinfo special file is used.
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*
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* It creates a registry subhierarchy, looking like:
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* \HARDWARE\DESCRIPTION\System\CentralProcessor\<processornumber>\
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* Identifier (CPU x86)
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* Note that there is a hierarchy for every processor installed, so this
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* supports multiprocessor systems. This is done like Win95 does it, I think.
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*
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* It also creates a cached flag array for IsProcessorFeaturePresent().
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*
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* No NULL ptr check for LPSYSTEM_INFO in Win9x.
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*
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* RETURNS
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* nothing, really
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*/
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VOID WINAPI GetSystemInfo(
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LPSYSTEM_INFO si /* [out] system information */
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) {
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static int cache = 0;
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static SYSTEM_INFO cachedsi;
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HKEY xhkey=0,hkey;
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if (cache) {
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memcpy(si,&cachedsi,sizeof(*si));
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return;
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}
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memset(PF,0,sizeof(PF));
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/* choose sensible defaults ...
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* FIXME: perhaps overrideable with precompiler flags?
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*/
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cachedsi.u.s.wProcessorArchitecture = PROCESSOR_ARCHITECTURE_INTEL;
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cachedsi.dwPageSize = getpagesize();
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/* FIXME: the two entries below should be computed somehow... */
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cachedsi.lpMinimumApplicationAddress = (void *)0x00010000;
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cachedsi.lpMaximumApplicationAddress = (void *)0x7FFFFFFF;
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cachedsi.dwActiveProcessorMask = 1;
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cachedsi.dwNumberOfProcessors = 1;
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cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
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cachedsi.dwAllocationGranularity = 0x10000;
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cachedsi.wProcessorLevel = 3; /* 386 */
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cachedsi.wProcessorRevision = 0;
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cache = 1; /* even if there is no more info, we now have a cacheentry */
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memcpy(si,&cachedsi,sizeof(*si));
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/* Hmm, reasonable processor feature defaults? */
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/* Create these registry keys for all systems
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* FPU entry is often empty on Windows, so we don't care either */
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if ( (RegCreateKeyA(HKEY_LOCAL_MACHINE,"HARDWARE\\DESCRIPTION\\System\\FloatingPointProcessor",&hkey)!=ERROR_SUCCESS)
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|| (RegCreateKeyA(HKEY_LOCAL_MACHINE,"HARDWARE\\DESCRIPTION\\System\\CentralProcessor",&hkey)!=ERROR_SUCCESS) )
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{
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WARN("Unable to write FPU/CPU info to registry\n");
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}
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#ifdef linux
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{
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char buf[20];
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char line[200];
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FILE *f = fopen ("/proc/cpuinfo", "r");
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if (!f)
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return;
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xhkey = 0;
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while (fgets(line,200,f)!=NULL) {
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char *s,*value;
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/* NOTE: the ':' is the only character we can rely on */
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if (!(value = strchr(line,':')))
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continue;
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/* terminate the valuename */
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*value++ = '\0';
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/* skip any leading spaces */
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while (*value==' ') value++;
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if ((s=strchr(value,'\n')))
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*s='\0';
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/* 2.1 method */
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if (!strncasecmp(line, "cpu family",strlen("cpu family"))) {
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if (isdigit (value[0])) {
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switch (value[0] - '0') {
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case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
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cachedsi.wProcessorLevel= 3;
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break;
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case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
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cachedsi.wProcessorLevel= 4;
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break;
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case 5:
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case 6: /* PPro/2/3 has same info as P1 */
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cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
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cachedsi.wProcessorLevel= 5;
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break;
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case 1: /* two-figure levels */
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if (value[1] == '5')
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{
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cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
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cachedsi.wProcessorLevel= 5;
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break;
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}
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/* fall through */
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default:
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FIXME("unknown cpu family '%s', please report ! (-> setting to 386)\n", value);
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break;
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}
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}
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/* set the CPU type of the current processor */
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sprintf(buf,"CPU %ld",cachedsi.dwProcessorType);
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if (xhkey)
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RegSetValueExA(xhkey,"Identifier",0,REG_SZ,buf,strlen(buf));
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continue;
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}
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/* old 2.0 method */
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if (!strncasecmp(line, "cpu",strlen("cpu"))) {
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if ( isdigit (value[0]) && value[1] == '8' &&
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value[2] == '6' && value[3] == 0
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) {
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switch (value[0] - '0') {
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case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
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cachedsi.wProcessorLevel= 3;
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break;
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case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
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cachedsi.wProcessorLevel= 4;
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break;
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case 5:
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case 6: /* PPro/2/3 has same info as P1 */
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cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
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cachedsi.wProcessorLevel= 5;
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break;
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default:
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FIXME("unknown Linux 2.0 cpu family '%s', please report ! (-> setting to 386)\n", value);
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break;
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}
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}
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/* set the CPU type of the current processor
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* FIXME: someone reported P4 as being set to
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* " Intel(R) Pentium(R) 4 CPU 1500MHz"
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* Do we need to do the same ?
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* */
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sprintf(buf,"CPU %ld",cachedsi.dwProcessorType);
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if (xhkey)
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RegSetValueExA(xhkey,"Identifier",0,REG_SZ,buf,strlen(buf));
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continue;
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}
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if (!strncasecmp(line,"fdiv_bug",strlen("fdiv_bug"))) {
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if (!strncasecmp(value,"yes",3))
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PF[PF_FLOATING_POINT_PRECISION_ERRATA] = TRUE;
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continue;
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}
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if (!strncasecmp(line,"fpu",strlen("fpu"))) {
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if (!strncasecmp(value,"no",2))
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PF[PF_FLOATING_POINT_EMULATED] = TRUE;
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continue;
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}
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if (!strncasecmp(line,"processor",strlen("processor"))) {
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/* processor number counts up... */
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unsigned int x;
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if (sscanf(value,"%d",&x))
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if (x+1>cachedsi.dwNumberOfProcessors)
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cachedsi.dwNumberOfProcessors=x+1;
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/* Create a new processor subkey on a multiprocessor
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* system
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*/
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sprintf(buf,"%d",x);
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if (xhkey)
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RegCloseKey(xhkey);
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RegCreateKeyA(hkey,buf,&xhkey);
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}
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if (!strncasecmp(line,"stepping",strlen("stepping"))) {
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int x;
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if (sscanf(value,"%d",&x))
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cachedsi.wProcessorRevision = x;
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}
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if ( !strncasecmp(line,"flags",strlen("flags")) ||
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!strncasecmp(line,"features",strlen("features"))
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) {
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if (strstr(value,"cx8"))
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PF[PF_COMPARE_EXCHANGE_DOUBLE] = TRUE;
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if (strstr(value,"mmx"))
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PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
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if (strstr(value,"tsc"))
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PF[PF_RDTSC_INSTRUCTION_AVAILABLE] = TRUE;
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}
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}
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fclose (f);
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}
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memcpy(si,&cachedsi,sizeof(*si));
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#else /* linux */
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/* FIXME: how do we do this on other systems? */
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RegCreateKeyA(hkey,"0",&xhkey);
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RegSetValueExA(xhkey,"Identifier",0,REG_SZ,"CPU 386",strlen("CPU 386"));
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#endif /* !linux */
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if (xhkey)
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RegCloseKey(xhkey);
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if (hkey)
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RegCloseKey(hkey);
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}
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/***********************************************************************
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* IsProcessorFeaturePresent [KERNEL32.@]
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* RETURNS:
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* TRUE if processor feature present
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* FALSE otherwise
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*/
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BOOL WINAPI IsProcessorFeaturePresent (
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DWORD feature /* [in] feature number, see PF_ defines */
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) {
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SYSTEM_INFO si;
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GetSystemInfo (&si); /* To ensure the information is loaded and cached */
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if (feature < 64)
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return PF[feature];
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else
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return FALSE;
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}
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