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Commit | Line | Data |
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1 | /* port.c | |
2 | * General port I/O 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 <sys/io.h> | |
12 | #include <string.h> | |
13 | ||
14 | int main(int argc, char **argv) | |
15 | { | |
16 | unsigned int port; | |
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 < 2) || (argc > 4)) | |
27 | { | |
28 | usage: | |
29 | printf("usage: %s port [b|w|l [datum]]\n", argv[0]); | |
30 | return 2; | |
31 | } | |
32 | ||
33 | port = strtoul(argv[1], NULL, 0); | |
34 | ||
35 | if (argc > 2) | |
36 | type = *argv[2]; | |
37 | ||
38 | if (argc > 3) | |
39 | { | |
40 | datum = strtoul(argv[3], NULL, 0); | |
41 | switch (type) | |
42 | { | |
43 | case 'b': | |
44 | datum &= 0xFF; | |
45 | outb(datum, port); | |
46 | printf("Wrote byte 0x%02x to port 0x%04x\n", datum, port); | |
47 | break; | |
48 | case 'w': | |
49 | datum &= 0xFFFF; | |
50 | outw(datum, port); | |
51 | printf("Wrote word 0x%04x to port 0x%04x\n", datum, port); | |
52 | break; | |
53 | case 'l': | |
54 | outb(datum, port); | |
55 | printf("Wrote long 0x%08x to port 0x%04x\n", datum, port); | |
56 | break; | |
57 | default: | |
58 | goto usage; | |
59 | } | |
60 | } else { | |
61 | switch(type) | |
62 | { | |
63 | case 'b': | |
64 | datum = inb(port); | |
65 | printf("Read byte 0x%02x from port 0x%04x\n", datum, port); | |
66 | break; | |
67 | case 'w': | |
68 | datum = inw(port); | |
69 | printf("Read word 0x%04x from port 0x%04x\n", datum, port); | |
70 | break; | |
71 | case 'l': | |
72 | datum = inl(port); | |
73 | printf("Read long 0x%08x from port 0x%04x\n", datum, port); | |
74 | break; | |
75 | default: | |
76 | goto usage; | |
77 | } | |
78 | } | |
79 | } |