PCI.rar_PCI 设备

#include <stdio.h> #include <conio.h> #include <dos.h> typedef unsigned char BYTE; typedef unsigned int WORD; typedef unsigned long DWORD; /* PCI设备索引。bus/dev/func 共16位，为了方便处理可放在一个WORD中 */ #define PDI_BUS_SHIFT 8 #define PDI_BUS_SIZE 8 #define PDI_BUS_MAX 0xFF #define PDI_BUS_MASK 0xFF00 #define PDI_DEVICE_SHIFT 3 #define PDI_DEVICE_SIZE 5 #define PDI_DEVICE_MAX 0x1F #define PDI_DEVICE_MASK 0x00F8 #define PDI_FUNCTION_SHIFT 0 #define PDI_FUNCTION_SIZE 3 #define PDI_FUNCTION_MAX 0x7 #define PDI_FUNCTION_MASK 0x0007 #define MK_PDI(bus,dev,func) (WORD)((bus&PDI_BUS_MAX)<<PDI_BUS_SHIFT | (dev&PDI_DEVICE_MAX)<<PDI_DEVICE_SHIFT | (func&PDI_FUNCTION_MAX) ) int main(void) { int bus, dev, func; int i; union REGS regs; WORD wAddr; FILE* hF; char szFile[0x10]; printf("\n"); printf("Bus#\tDevice#\tFunc#\tVendor\tDevice\tClass\tIRQ\tIntPin\n"); /* 枚举PCI设备 */ for(bus = 0; bus <= PDI_BUS_MAX; ++bus) { for(dev = 0; dev <= PDI_DEVICE_MAX; ++dev) { for(func = 0; func <= PDI_FUNCTION_MAX; ++func) { /* 计算地址 */ wAddr = MK_PDI(bus, dev, func); /* 获取厂商ID */ regs.x.ax = 0xB109; // PCI BIOS v2.0c+ - READ CONFIGURATION WORD regs.x.bx = wAddr; regs.x.di = 0; // Vendor ID regs.x.cx = 0xFFFF; // 非法的Vendor ID int86(0x1A, &regs, &regs); /* 判断设备是否存在。FFFFh是非法厂商ID */ if (regs.x.cx != 0xFFFF) { /* bus/dev/func */ printf("%2.2X\t%2.2X\t%1X\t", bus, dev, func); /* Vendor */ printf("%4.4X\t", regs.x.cx); /* Device */ regs.x.ax = 0xB109; // PCI BIOS v2.0c+ - READ CONFIGURATION WORD regs.x.bx = wAddr; regs.x.di = 2; // Device ID int86(0x1A, &regs, &regs); printf("%4.4X\t", regs.x.cx); /* Class Code */ regs.x.ax = 0xB109; // PCI BIOS v2.0c+ - READ CONFIGURATION WORD regs.x.bx = wAddr; regs.x.di = 0xA; // Class/SubClass int86(0x1A, &regs, &regs); printf("%4.4X\t", regs.x.cx); /* IRQ/intPin */ regs.x.ax = 0xB109; // PCI BIOS v2.0c+ - READ CONFIGURATION WORD regs.x.bx = wAddr; regs.x.di = 0x3C; // IRQ/IntPin int86(0x1A, &regs, &regs); printf("%d\t", (BYTE)regs.x.cx); printf("%d", (BYTE)(regs.x.cx>>8)); printf("\n"); /* 写文件 */ sprintf(szFile, "PCI%2.2X%2.2X%X.bin", bus, dev, func); hF = fopen(szFile, "wb"); if (hF != NULL) { /* 256字节的PCI配置空间 */ for (i = 0; i < 0x100; i += 2) { /* Read */ regs.x.ax = 0xB109; // PCI BIOS v2.0c+ - READ CONFIGURATION WORD regs.x.bx = wAddr; regs.x.di = i; int86(0x1A, &regs, &regs); /* Write */ fwrite(&regs.x.cx, 2, 1, hF); } fclose(hF); } } } } } return 0; }