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Sweden-Number/dlls/kernel/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"
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifdef HAVE_SYS_SYSCTL_H
# include <sys/sysctl.h>
#endif
#ifdef HAVE_MACHINE_CPU_H
# include <machine/cpu.h>
#endif
#include <ctype.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "windef.h"
#include "winbase.h"
#include "winnt.h"
#include "winreg.h"
#include "winternl.h"
#include "winerror.h"
#include "wine/unicode.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(reg);
#define AUTH 0x68747541 /* "Auth" */
#define ENTI 0x69746e65 /* "enti" */
#define CAMD 0x444d4163 /* "cAMD" */
/* Calls cpuid with an eax of 'ax' and returns the 16 bytes in *p
* We are compiled with -fPIC, so we can't clobber ebx.
*/
static inline void do_cpuid(int ax, int *p)
{
#ifdef __i386__
__asm__("pushl %%ebx\n\t"
"cpuid\n\t"
"movl %%ebx, %%esi\n\t"
"popl %%ebx"
: "=a" (p[0]), "=S" (p[1]), "=c" (p[2]), "=d" (p[3])
: "0" (ax));
#endif
}
/* From xf86info havecpuid.c 1.11 */
static inline int have_cpuid(void)
{
#ifdef __i386__
unsigned int f1, f2;
__asm__("pushfl\n\t"
"pushfl\n\t"
"popl %0\n\t"
"movl %0,%1\n\t"
"xorl %2,%0\n\t"
"pushl %0\n\t"
"popfl\n\t"
"pushfl\n\t"
"popl %0\n\t"
"popfl"
: "=&r" (f1), "=&r" (f2)
: "ir" (0x00200000));
return ((f1^f2) & 0x00200000) != 0;
#else
return 0;
#endif
}
static BYTE PF[64] = {0,};
static ULONGLONG cpuHz = 1000000000; /* default to a 1GHz */
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};
static const WCHAR mhzKeyW[] = {'~','M','H','z',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];
DWORD cpuMHz = cpuHz / 1000000;
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) );
RtlInitUnicodeString( &valueW, mhzKeyW );
NtSetValueKey( hkey, &valueW, 0, REG_DWORD, &cpuMHz, sizeof(DWORD) );
NtClose( hkey );
}
RtlFreeUnicodeString( &nameW );
}
NtClose( cpu_key );
}
NtClose( system_key );
}
/****************************************************************************
* QueryPerformanceCounter (KERNEL32.@)
*
* Get the current value of the performance counter.
*
* PARAMS
* counter [O] Destination for the current counter reading
*
* RETURNS
* Success: TRUE. counter contains the current reading
* Failure: FALSE.
*
* SEE ALSO
* See QueryPerformanceFrequency.
*/
BOOL WINAPI QueryPerformanceCounter(PLARGE_INTEGER counter)
{
struct timeval tv;
#if defined(__i386__) && defined(__GNUC__)
if (IsProcessorFeaturePresent( PF_RDTSC_INSTRUCTION_AVAILABLE )) {
/* i586 optimized version */
__asm__ __volatile__ ( "rdtsc"
: "=a" (counter->s.LowPart), "=d" (counter->s.HighPart) );
counter->QuadPart = counter->QuadPart / 1000; /* see below */
return TRUE;
}
#endif
/* fall back to generic routine (ie, for i386, i486) */
gettimeofday( &tv, NULL );
counter->QuadPart = (LONGLONG)tv.tv_usec + (LONGLONG)tv.tv_sec * 1000000;
return TRUE;
}
/****************************************************************************
* QueryPerformanceFrequency (KERNEL32.@)
*
* Get the resolution of the performace counter.
*
* PARAMS
* frequency [O] Destination for the counter resolution
*
* RETURNS
* Success. TRUE. Frequency contains the resolution of the counter.
* Failure: FALSE.
*
* SEE ALSO
* See QueryPerformanceCounter.
*/
BOOL WINAPI QueryPerformanceFrequency(PLARGE_INTEGER frequency)
{
#if defined(__i386__) && defined(__GNUC__)
if (IsProcessorFeaturePresent( PF_RDTSC_INSTRUCTION_AVAILABLE )) {
/* The way Windows calculates this value is unclear, however simply using the CPU frequency
gives a value out by approximately a thousand. That can cause some applications to crash,
so we divide here to make our number more similar to the one Windows gives */
frequency->QuadPart = cpuHz / 1000;
return TRUE;
}
#endif
frequency->s.LowPart = 1000000;
frequency->s.HighPart = 0;
return TRUE;
}
/***********************************************************************
* GetSystemInfo [KERNEL32.@]
*
* Get information about the system.
*
* RETURNS
* Nothing.
*
* NOTES
* 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().
*/
VOID WINAPI GetSystemInfo(
LPSYSTEM_INFO si /* [out] Destination for system information, may not be NULL */)
{
static int cache = 0;
static SYSTEM_INFO cachedsi;
TRACE("si=0x%p\n", si);
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 */
s = value - 1;
while ((s >= line) && ((*s == ' ') || (*s == '\t'))) s--;
*(s + 1) = '\0';
/* and strip leading spaces from value */
value += 1;
while (*value==' ') value++;
if ((s=strchr(value,'\n')))
*s='\0';
/* 2.1 method */
if (!strcasecmp(line, "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= 6;
break;
case 1: /* two-figure levels */
if (value[1] == '5')
{
cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.wProcessorLevel= 6;
break;
}
/* fall through */
default:
FIXME("unknown cpu family '%s', please report ! (-> setting to 386)\n", value);
break;
}
}
continue;
}
/* old 2.0 method */
if (!strcasecmp(line, "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= 6;
break;
default:
FIXME("unknown Linux 2.0 cpu family '%s', please report ! (-> setting to 386)\n", value);
break;
}
}
continue;
}
if (!strcasecmp(line,"fdiv_bug")) {
if (!strncasecmp(value,"yes",3))
PF[PF_FLOATING_POINT_PRECISION_ERRATA] = TRUE;
continue;
}
if (!strcasecmp(line,"fpu")) {
if (!strncasecmp(value,"no",2))
PF[PF_FLOATING_POINT_EMULATED] = TRUE;
continue;
}
if (!strcasecmp(line,"processor")) {
/* processor number counts up... */
unsigned int x;
if (sscanf(value,"%d",&x))
if (x+1>cachedsi.dwNumberOfProcessors)
cachedsi.dwNumberOfProcessors=x+1;
continue;
}
if (!strcasecmp(line,"stepping")) {
int x;
if (sscanf(value,"%d",&x))
cachedsi.wProcessorRevision = x;
continue;
}
if (!strcasecmp(line, "cpu MHz")) {
double cmz;
if (sscanf( value, "%lf", &cmz ) == 1) {
/* SYSTEMINFO doesn't have a slot for cpu speed, so store in a global */
cpuHz = cmz * 1000 * 1000;
TRACE("CPU speed read as %lld\n", cpuHz);
}
continue;
}
if ( !strcasecmp(line,"flags") ||
!strcasecmp(line,"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;
if (strstr(value,"3dnow"))
PF[PF_3DNOW_INSTRUCTIONS_AVAILABLE] = TRUE;
/* This will also catch sse2, but we have sse itself
* if we have sse2, so no problem */
if (strstr(value,"sse"))
PF[PF_XMMI_INSTRUCTIONS_AVAILABLE] = TRUE;
if (strstr(value,"sse2"))
PF[PF_XMMI64_INSTRUCTIONS_AVAILABLE] = TRUE;
if (strstr(value,"pae"))
PF[PF_PAE_ENABLED] = TRUE;
continue;
}
}
fclose (f);
}
memcpy(si,&cachedsi,sizeof(*si));
#elif defined (__NetBSD__)
{
int mib[2];
int value[2];
char model[256];
char *cpuclass;
FILE *f = fopen ("/var/run/dmesg.boot", "r");
/* first deduce as much as possible from the sysctls */
mib[0] = CTL_MACHDEP;
#ifdef CPU_FPU_PRESENT
mib[1] = CPU_FPU_PRESENT;
value[1] = sizeof(int);
if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
if (value) PF[PF_FLOATING_POINT_EMULATED] = FALSE;
else PF[PF_FLOATING_POINT_EMULATED] = TRUE;
#endif
#ifdef CPU_SSE
mib[1] = CPU_SSE; /* this should imply MMX */
value[1] = sizeof(int);
if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
if (value) PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
#endif
#ifdef CPU_SSE2
mib[1] = CPU_SSE2; /* this should imply MMX */
value[1] = sizeof(int);
if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
if (value) PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
#endif
mib[0] = CTL_HW;
mib[1] = HW_NCPU;
value[1] = sizeof(int);
if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
if (value[0] > cachedsi.dwNumberOfProcessors)
cachedsi.dwNumberOfProcessors = value[0];
mib[1] = HW_MODEL;
value[1] = 255;
if (sysctl(mib, 2, model, value+1, NULL, 0) >= 0) {
model[value[1]] = '\0'; /* just in case */
cpuclass = strstr(model, "-class");
if (cpuclass != NULL) {
while(cpuclass > model && cpuclass[0] != '(') cpuclass--;
if (!strncmp(cpuclass+1, "386", 3)) {
cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
cachedsi.wProcessorLevel= 3;
}
if (!strncmp(cpuclass+1, "486", 3)) {
cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
cachedsi.wProcessorLevel= 4;
}
if (!strncmp(cpuclass+1, "586", 3)) {
cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.wProcessorLevel= 5;
}
if (!strncmp(cpuclass+1, "686", 3)) {
cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.wProcessorLevel= 6;
/* this should imply MMX */
PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
}
}
}
/* it may be worth reading from /var/run/dmesg.boot for
additional information such as CX8, MMX and TSC
(however this information should be considered less
reliable than that from the sysctl calls) */
if (f != NULL)
{
while (fgets(model, 255, f) != NULL) {
if (sscanf(model,"cpu%d: features %x<", value, value+1) == 2) {
/* we could scan the string but it is easier
to test the bits directly */
if (value[1] & 0x1)
PF[PF_FLOATING_POINT_EMULATED] = TRUE;
if (value[1] & 0x10)
PF[PF_RDTSC_INSTRUCTION_AVAILABLE] = TRUE;
if (value[1] & 0x100)
PF[PF_COMPARE_EXCHANGE_DOUBLE] = TRUE;
if (value[1] & 0x800000)
PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
break;
}
}
fclose(f);
}
}
memcpy(si,&cachedsi,sizeof(*si));
#elif defined(__FreeBSD__)
{
unsigned int regs[4], regs2[4];
int ret, len, num;
if (!have_cpuid())
regs[0] = 0; /* No cpuid support -- skip the rest */
else
do_cpuid(0x00000000, regs); /* get standard cpuid level and vendor name */
if (regs[0]>=0x00000001) { /* Check for supported cpuid version */
do_cpuid(0x00000001, regs2); /* get cpu features */
switch ((regs2[0] >> 8)&0xf) { /* cpu family */
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:
case 15: /* PPro/2/3/4 has same info as P1 */
cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
cachedsi.wProcessorLevel = 6;
break;
default:
FIXME("unknown FreeBSD cpu family %d, please report! (-> setting to 386)\n", \
(regs2[0] >> 8)&0xf);
break;
}
PF[PF_FLOATING_POINT_EMULATED] = !(regs2[3] & 1);
PF[PF_RDTSC_INSTRUCTION_AVAILABLE] = (regs2[3] & (1 << 4 )) >> 4;
PF[PF_COMPARE_EXCHANGE_DOUBLE] = (regs2[3] & (1 << 8 )) >> 8;
PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = (regs2[3] & (1 << 23)) >> 23;
/* Check for OS support of SSE -- Is this used, and should it be sse1 or sse2? */
/*len = sizeof(num);
ret = sysctlbyname("hw.instruction_sse", &num, &len, NULL, 0);
if (!ret)
PF[PF_XMMI_INSTRUCTIONS_AVAILABLE] = num;*/
if (regs[1] == AUTH &&
regs[3] == ENTI &&
regs[2] == CAMD) {
do_cpuid(0x80000000, regs); /* get vendor cpuid level */
if (regs[0]>=0x80000001) {
do_cpuid(0x80000001, regs2); /* get vendor features */
PF[PF_3DNOW_INSTRUCTIONS_AVAILABLE] =
(regs2[3] & (1 << 31 )) >> 31;
}
}
}
len = sizeof(num);
ret = sysctlbyname("hw.ncpu", &num, &len, NULL, 0);
if (!ret)
cachedsi.dwNumberOfProcessors = num;
}
memcpy(si,&cachedsi,sizeof(*si));
#else
FIXME("not yet supported on this system\n");
#endif
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.@]
*
* Determine if the cpu supports a given feature.
*
* RETURNS
* TRUE, If the processor supports feature,
* FALSE otherwise.
*/
BOOL WINAPI IsProcessorFeaturePresent (
DWORD feature /* [in] Feature number, (PF_ constants from "winnt.h") */)
{
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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