Aktos_lab4

#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/io.h>
#include "pci.h"

unsigned getValueOfReg(const int pci, const int device, const int function, const int reg)
{
    int address = (1 << 31) | (pci << 16) | (device << 11) | (function << 8) | (reg << 2);
    outl(address, 0x0CF8);
    int res = inl(0x0CFC);
    return res;
}

int main()
{
    unsigned value, deviceId, vendorId, intPin;

    if(iopl(3))
    {
        printf("I/O Privilege level change error: %s\nTry running under ROOT user\n",(char *)strerror(errno));
    }
    else {
        for (int pci = 0; pci < 256; pci++) {
            for (int device = 0; device < 32; device++) {
                for (int function = 0; function < 8; function++) {
                    value = getValueOfReg(pci, device, function, 0);
                    deviceId = (value >> 16) & 0xFFFF;
                    if (value != -1) {
                        vendorId = value & 0xFFFF;

                        puts("______________________________________________________");
                        printf("Address: %x-%x-%x\n", pci, device, function);
                        for (int i = 0; i < PCI_VENTABLE_LEN; ++i) {
                            if (PciVenTable[i].VendorId == vendorId) {
                                printf("VendorID: %s\n", PciVenTable[i].VendorName);
                            }
                        }
                        for (int i = 0; i < PCI_DEVTABLE_LEN; ++i) {
                            if (PciDevTable[i].VendorId == vendorId && PciDevTable[i].DeviceId == deviceId) {
                                printf("DeviceID: %s\n", PciDevTable[i].DeviceName);
                            }
                        }
                        if ((getValueOfReg(pci, device, function, 3) >> 16) == 0) {

                            for (int i = 0; i < 6; ++i) {
                                if (getValueOfReg(pci, device, function, i + 4) & 0x1)
                                    printf("Base Address Register %x: %x\n", i,
                                           getValueOfReg(pci, device, function, i + 4));
                            }


                        }else{
                            printf("Primary Bus Number: %02x\n", (getValueOfReg(pci, device, function, 6) >> 0) & 0xFF);
                            printf("Secondary Bus Number: %02x\n", (getValueOfReg(pci, device, function, 6) >> 8) & 0xFF);
                            printf("Subordinate Bus Number: %02x\n", (getValueOfReg(pci, device, function, 6) >> 16) & 0xFF);

                            printf("Memory Base: %02x\n", (getValueOfReg(pci, device, function, 8) >> 0) & 0xFF);
                            printf("Memory Limit: %02x\n", (getValueOfReg(pci, device, function, 8) >> 16) & 0xFF);
                        }
                    }
                }
            }
        }
    }
    return 0;
}