]> Joshua Wise's Git repositories - netwatch.git/blob - tools/pci.c
Move the Multiboot code around to have more sane filenames.
[netwatch.git] / tools / pci.c
1 /* pci.c
2  * Arbitrary PCI space reader/writer utility
3  * NetWatch system management mode administration console
4  *
5  * Copyright (c) 2008 Jacob Potter and Joshua Wise.  All rights reserved.
6  * This program is free software; you can redistribute and/or modify it under
7  * the terms found in the file LICENSE in the root of this source tree.
8  *
9  */
10
11 #include <pci.h>
12 #include <string.h>
13
14 int main(int argc, char **argv)
15 {
16         unsigned int bus, dev, fn, addr;
17         unsigned char type = 'b';
18         unsigned int datum;
19         
20         if (iopl(3) < 0)
21         {
22                 perror("iopl");
23                 return 1;
24         }
25         
26         if ((argc < 5) || (argc > 7))
27         {
28         usage:
29                 printf("usage: %s bus dev fn addr [b|w|l [datum]]\n", argv[0]);
30                 return 2;
31         }
32         
33         bus = strtoul(argv[1], NULL, 0);
34         dev = strtoul(argv[2], NULL, 0);
35         fn = strtoul(argv[3], NULL, 0);
36         addr = strtoul(argv[4], NULL, 0);
37         
38         if (argc > 5)
39                 type = *argv[5];
40         
41         if (argc > 6)
42         {
43                 datum = strtoul(argv[6], NULL, 0);
44                 switch (type)
45                 {
46                 case 'b':
47                         datum &= 0xFF;
48                         pci_write8(bus, dev, fn, addr, datum);
49                         printf("Wrote byte 0x%02x to %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
50                         break;
51                 case 'w':
52                         datum &= 0xFFFF;
53                         pci_write16(bus, dev, fn, addr, datum);
54                         printf("Wrote word 0x%04x to %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
55                         break;
56                 case 'l':
57                         pci_write32(bus, dev, fn, addr, datum);
58                         printf("Wrote long 0x%08x to %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
59                         break;
60                 default:
61                         goto usage;
62                 }
63         } else {
64                 switch(type)
65                 {
66                 case 'b':
67                         datum = pci_read8(bus, dev, fn, addr);
68                         printf("Read byte 0x%02x from %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
69                         break;
70                 case 'w':
71                         datum = pci_read16(bus, dev, fn, addr);
72                         printf("Read word 0x%04x from %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
73                         break;
74                 case 'l':
75                         datum = pci_read32(bus, dev, fn, addr);
76                         printf("Read long 0x%08x from %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
77                         break;
78                 default:
79                         goto usage;
80                 }
81         }
82 }
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