pciscan.h

对PCI总线设备配置空间进行访问`枚举的小程序,

/*****************************************************************************
Copyright (c) VIA Technologies(China), Inc.
Author: Charlie Feng, Software Team
File: pciscan.h
Version: 0.2
Last Modified: 2007-04-25
Description: The header file of pciscan. 
*****************************************************************************/

#ifndef TRAINNING_PCI_SCAN_H
#define TRAINNING_PCI_SCAN_H


// Two Configuration Space Registers
#define PCI_CONFIG_ADDRESS      0xCF8
#define PCI_CONFIG_DATA         0xCFC

// Maximum possible numbers of Bus/Device/Function
#define BUS_MAX     0xff
#define DEVICE_MAX     0x1f
#define FUNCTION_MAX     0x7

// Mask bits for Bus/Device/Function
#define BUS_MASK    0xff00
#define DEVICE_MASK    0x00f8
#define FUNCTION_MASK    0x0007

// Other consts
#define FILE_NAME_MAX 30

// Calculate the Index written to PCI_CONFIG_ADDRESS
DWORD PCI_Index(unsigned int nBus, unsigned int nDevice, unsigned int nFunction);

// Display welcome information
void WelcomeMsg();

#endif