exp03_pci设备查询和配置空间的读取.cpp

PCI设备查询及其配置空间的读取,Win9X/me下可以用,显示数据含义可查看PCI22规范中的介绍

/***************************************/
/*    PCI设备查询及其配置空间的读取    */
/*           Win9X/me下可以用          */
/* 显示数据含义可查看PCI22规范中的介绍 */
/***************************************/
#include "stdio.h"
#include "windows.h"

DWORD DWORD_In(WORD io_Port)
{
	DWORD val;
	_asm {
		mov	dx,io_Port
		in	eax,dx
		mov	val,eax
	}
	return val;
}

DWORD DWORD_Out(WORD io_Port,DWORD val)
{
	_asm {
		mov	dx,io_Port
		mov	eax,val
		out	dx,eax
	}
	return 0;
}

int main()
{
	DWORD io_CF8;		// port 0xcf8 Address
	DWORD io_CFC;		// port 0xcfc Data
	DWORD io_CFC_TEMP = 0xffffffff;	// temp
	int i;

	io_CF8=0x80000000;		//file://because the first bit is enable/disable
							//file://so must be 1,so from 0x800000000
	do{
		DWORD_Out(0xcf8,io_CF8);
		io_CFC = DWORD_In(0xcfc);
		if (io_CFC == io_CFC_TEMP)		//防止配置空间数据重复
			io_CFC = 0xffffffff;
		else
			io_CFC_TEMP = io_CFC;
		if (io_CFC != 0xffffffff)		//file://if =0xffffffff,then is a invalid
		{								//file://bus number and device number
			printf("\nPCI device has found,the pci config address = %lx \n",io_CF8);
			printf("its Bus Numer is %lx \n",(io_CF8&0x00ff0000)/0x10000);
			printf("its Device Number is %lx \n",(io_CF8&0x0000f800)/0x800);
			printf("its Functin Number is %lx \n",(io_CF8&0x700)/0x100);
			printf("its Register Number is %lx \n",(io_CF8&0xfc)>>2);
			for (i=0 ;i<=15;i++)
			{
				DWORD_Out(0xcf8,io_CF8+4*i);		//file://read DWORD
				io_CFC=DWORD_In(0xcfc);
				switch (i)
				{
					case 0:
						printf("00H Device Number = %lx Vendor Number = %lx \n",
							(io_CFC&0xffff0000)/0x10000,io_CFC&0xffff);
						break;
					case 1:
						printf("04H Status = %lx Command = %lx \n",
							(io_CFC&0xffff0000)/0x10000,io_CFC&0xffff);
						break;
					case 2:
						printf("08H Class Code = %lx Revision ID = %lx \n",
							(io_CFC&0xffffff00)/0x100,io_CFC&0xff);
						break;
					case 3:
						printf("0CH Bist = %lx Header Type = %lx Latency Timer = %lx Cache Line Size = %lx \n",
							(io_CFC&0xff000000)/0x1000000,(io_CFC&0xff0000)/0x10000,(io_CFC&0xff00)/0x100,io_CFC&0xff);
						break;
					case 4:			//file://PCI Configration has 6 base address
									//file://register
						printf("10H Base Address Register #0 ,");
						if (io_CFC == 0)
							printf("None \n");
						else
							if (io_CFC&0x1)
							{
								printf("I/O = %lx \n",io_CFC&0xfffffffc);
							}else
							{
								printf("Memory = %lx Prefetchable = %lx Type = %lx \n",
									io_CFC&0xfffffff0,(io_CFC&0x8)>>3,(io_CFC&0x6)>>1);
							}
						break;
					case 5:
						printf("14H Base Address Register #1 ,");
						if (io_CFC == 0)
							printf("None \n");
						else
							if (io_CFC&0x1)
							{
								printf("I/O = %lx \n",io_CFC&0xfffffffc);
							}else
							{
								printf("Memory = %lx Prefetchable = %lx Type = %lx \n",
									io_CFC&0xfffffff0,(io_CFC&0x8)>>3,(io_CFC&0x6)>>1);
							}
						break;
					case 6:
						printf("18H Base Address Register #2 ,");
						if (io_CFC == 0)
							printf("None \n");
						else
							if (io_CFC&0x1)
							{
								printf("I/O = %lx \n",io_CFC&0xfffffffc);
							}else
							{
								printf("Memory = %lx Prefetchable = %lx Type = %lx \n",
									io_CFC&0xfffffff0,(io_CFC&0x8)>>3,(io_CFC&0x6)>>1);
							}
						break;
					case 7:
						printf("1CH Base Address Register #3 ,");
						if (io_CFC == 0)
							printf("None \n");
						else
							if (io_CFC&0x1)
							{
								printf("I/O = %lx \n",io_CFC&0xfffffffc);
							}else
							{
								printf("Memory = %lx Prefetchable = %lx Type = %lx \n",
									io_CFC&0xfffffff0,(io_CFC&0x8)>>3,(io_CFC&0x6)>>1);
							}
						break;
					case 8:
						printf("20H Base Address Register #4 ,");
						if (io_CFC == 0)
							printf("None \n");
						else
							if (io_CFC&0x1)
							{
								printf("I/O = %lx \n",io_CFC&0xfffffffc);
							}else
							{
								printf("Memory = %lx Prefetchable = %lx Type = %lx \n",
									io_CFC&0xfffffff0,(io_CFC&0x8)>>3,(io_CFC&0x6)>>1);
							}
						break;
					case 9:
						printf("24H Base Address Register #5 ,");
						if (io_CFC == 0)
							printf("None \n");
						else
							if (io_CFC&0x1)
							{
								printf("I/O = %lx \n",io_CFC&0xfffffffc);
							}else
							{
								printf("Memory = %lx Prefetchable = %lx Type = %lx \n",
									io_CFC&0xfffffff0,(io_CFC&0x8)>>3,(io_CFC&0x6)>>1);
							}
						break;
					case 10:
						printf("28H Cardbus CIS Pointer = %lx \n",io_CFC);
						break;
					case 11:
						printf("2CH Subsystem ID = %lx Subsystem Vendor ID = %lx \n",
							(io_CFC&0xffff0000)/0x10000,io_CFC&0xffff);
						break;
					case 12:
						printf("30H Expanslon ROM Base Address = %lx \n",io_CFC);
						break;
					case 13:
						printf("34H Capabilities Pointer = %lx \n",io_CFC&0xf);
						break;
					case 14:
						printf("38H Reserved \n");
						break;
					case 15:		//file://attention:the interrupt IRQ= this result&0xff
						printf("3CH Max_Lat = %lx Min_Gnt =%lx Interrupt Pin = %lx Interrupt Line = %lx \n",
							(io_CFC&0xff000000)/0x1000000,(io_CFC&0xff0000)/0x10000,(io_CFC&0xff00)/0x100,io_CFC&0xff);
						break;
				}
			}
			printf("\nPress ENTER to NEXT!");
			getchar();
		}
		io_CF8 += 0x100;
	}while(io_CF8<0x80FFFF00);
	printf("\nPress ENTER to EXIT!");
	getchar();
	return 0;
}