怎么样获得PCI槽上的硬件信息？

[cpp_pro]

~

[honix]

# lspci

[cpp_pro]

我是说编程实现

[honix]

要得到pci配置空间的信息可通过写0xCF8然后读0xCFC端口实现，把我的一个程序给你看看吧！

/*
* Read the PCI Configuration Register
*
* Author: houaq <[e-mail]>
*/
#include <sys/io.h>
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>

#define PCI_CONFIG_ADDR(bus, dev, fn, reg) \
(0x80000000 | (bus << 16) | (dev << 11) | (fn << 8) | (reg & ~3))

void usage()
{
printf("Usage: readpci [-bdfrth]\n\
-b bus : specify PCI bus number(default 0)\n\
-d dev : device number(default 0)\n\
-f fn : function number(default 0)\n\
-r reg : register address(must be multiple of 4, default 0)\n\
-t type: byte length of result(may be 1, 2, 4, default 4)\n\
-h : print this help text\n");
exit(-1);
}

int main(int argc, char **argv)
{
unsigned long val = 0;
char options[] = "b:d:f:r:t:h";
int bus = 0, dev = 0, fn = 0, reg = 0, type = 4;
int opt;

while((opt = getopt(argc, argv, options)) != -1) {
switch(opt) {
case 'b':
bus = atoi(optarg);
break;
case 'd':
dev = atoi(optarg);
break;
case 'f':
fn = atoi(optarg);
break;
case 'r':
reg = atoi(optarg);
break;
case 't':
type = atoi(optarg);
break;
case 'h':
default:
usage();
break;
}
}

iopl(3);

outl(PCI_CONFIG_ADDR(bus, dev, fn, reg), 0xCF8);

switch(type) {
case 1:
val = inb(0xCFC);
break;
case 2:
val = inw(0xCFC);
break;
case 4:
val = inl(0xCFC);
break;
default:
break;
}

printf("PCI: Bus %d, DEV %d, FUNC %d, REG %d, Value is %lX\n", bus, dev, fn, reg, val);

return 0;
}