// PCIConfig.h: interface for the PCIConfig class.
// PCI配置空間讀取1.0本代碼由桃源村編寫 2004.6.12
// 功能:讀取查詢PCI配置寄存器只適合X86體系下的win98/nt/2000/xp
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "PCIConfig.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

PCIConfig::PCIConfig()
{

}

PCIConfig::~PCIConfig()
{

}

UINT PCIConfig::GetPCIConfig(DWORD VendorID, DWORD DeviceID)
{
	DWORD DeviceVendor=(DeviceID<<16)+VendorID;
	DWORD INPCIC=0; 
	DWORD PCIbuf[16];
	memset(PCIbuf,0,64);
	DWORD * pPCIbufpos=PCIbuf;
	DWORD PCIConfBaseAddr=0x80000000;
	UINT i=0;
	for(;;)
	{
		SetPortVal(0xcf8,PCIConfBaseAddr,4);
		GetPortVal(0xcfc,&INPCIC,4);
		if(INPCIC==DeviceVendor)
		{
			pPCIbufpos=PCIbuf;
			 for(i=0;i<16;i++,pPCIbufpos++)
			 {
				SetPortVal(0xcf8,PCIConfBaseAddr+4*i,4);
				GetPortVal(0xcfc,pPCIbufpos,4);
			 }
				PCIConf.VendorID=PCIbuf[0]&0xffff;
				PCIConf.DeviceID=((PCIbuf[0]&0x0000ffff)>>16);
				PCIConf.Command=PCIbuf[1]&0xffff;
				PCIConf.Status=((PCIbuf[1]&0x0000ffff)>>16);
				PCIConf.RevisionID=PCIbuf[2]&0xff;
				PCIConf.ClassCode=((PCIbuf[2]&0xffffff00)>>8);
				PCIConf.CacheLineSize=PCIbuf[3]&0xff;
				PCIConf.LatencyTimer=((PCIbuf[3]&0xff00)>>8);
				PCIConf.HeaderType=((PCIbuf[3]&0xff0000)>>16);
				PCIConf.BIST=((PCIbuf[3]&0xff000000)>>24);
				PCIConf.BaseAddressRegister[0]=PCIbuf[4];
				PCIConf.BaseAddressRegister[1]=PCIbuf[5];
				PCIConf.BaseAddressRegister[2]=PCIbuf[6];
				PCIConf.BaseAddressRegister[3]=PCIbuf[7];
				PCIConf.BaseAddressRegister[4]=PCIbuf[8];
				PCIConf.BaseAddressRegister[5]=PCIbuf[9];
				PCIConf.CardbusCISPointer=PCIbuf[10];
				PCIConf.SubsystemVendorID=PCIbuf[11]&0xffff;
				PCIConf.SubsystemID=((PCIbuf[11]&0xffff0000)>>16);
				PCIConf.ExpansionROMBaseAddress=PCIbuf[12];
				PCIConf.CapabllltlesPolnter=PCIbuf[13]&0xff;
				PCIConf.Reserved0=((PCIbuf[13]&0xffffff00)>>8);
				PCIConf.Reserved1=PCIbuf[14];
				PCIConf.InterruptLine=PCIbuf[15]&0xff;
				PCIConf.InterruptPin=((PCIbuf[15]&0xff00)>>8);
				PCIConf.Min_Gnt=((PCIbuf[15]&0xff0000)>>16);
				PCIConf.Max_Lat=((PCIbuf[15]&0xff000000)>>24);

				return 1;
		}
		if(PCIConfBaseAddr>=0x80ffffff)
		{
			return 0;
		}
		PCIConfBaseAddr=PCIConfBaseAddr+0x800;//枚舉PCI設備,16到23位表示總線號，第11到15位代表了插槽號
	}
	return 0;
}