os-k/kaleid/kernel/ke/cpuid.c

64 lines
2.6 KiB
C

//----------------------------------------------------------------------------//
// GNU GPL OS/K //
// //
// Desc: CPU detection //
// //
// //
// Copyright © 2018-2019 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K is free software: you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation, either version 3 of the License, or //
// any later version. //
// //
// OS/K 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 General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------//
#include <ke/cpuid.h>
#include <ke/time.h>
#include <io/vga.h>
void KeGetCpuInfos(void)
{
uint CpuVendorString[5] = {0};
extern CpuInfo_t CpuInfo;
uint eax = 0;
CpuCpuidString(0, CpuVendorString);
memmove(CpuInfo.vendorStr, (char *)&CpuVendorString[1], 12*sizeof(char));
CpuCpuid(1, &eax, &CpuInfo.featureFlag);
if (CpuInfo.featureFlag & FEAT_EDX_SSE) {
KeActivateSSE();
CpuInfo.frequency = KeGetCpuFrequency();
}
DebugLog("\tCPU %s %#d KHz detected with features %#x\n",
CpuInfo.vendorStr,
(long)(CpuInfo.frequency / 1000.0),
CpuInfo.featureFlag
);
}
double KeGetCpuFrequency(void)
{
ulong first = CpuRdtsc();
KeSleep(300);
ulong second = CpuRdtsc();
return ((double)(second) - (double)(first)) / 300.0;
}