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Inital commit of random SuperIO code.
author Daniel O'Connor <darius@dons.net.au>
date Thu, 20 Oct 2011 16:48:24 +1030
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c34b37680055 Inital commit of random SuperIO code.
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1 #include <stdio.h>
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2 #include <errno.h>
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3 #include <string.h>
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4 #include <fcntl.h>
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5 #include <stdlib.h>
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6 #include <sys/types.h>
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7 #include <machine/cpufunc.h>
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8
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9 void
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10 usage(char *name) {
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11 fprintf(stderr,
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12 "Bad usage\n"
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13 "\t%s adr [data]\n"
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14 "\n"
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15 "Read/write adr with data\n", name);
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16 exit(1);
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17 }
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19 int
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20 main(int argc, char **argv) {
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21 int fd, adr, data;
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23 if (argc != 2 && argc != 3)
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24 usage(argv[0]);
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26 if ((fd = open("/dev/io", O_RDWR)) == -1) {
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27 fprintf(stderr, "Can't open /dev/io: %s\n", strerror(errno));
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28 exit(1);
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29 }
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31 adr = strtol(argv[1], NULL, 0) & 0xffff;
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33 if (argc == 3) {
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34 data = strtol(argv[2], NULL, 0) & 0xff;
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35 printf("0x%02x <- 0x%02x\n", adr, data);
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36 outb(adr, data);
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37 } else
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38 printf("0x%02x -> 0x%02x\n", adr, inb(adr));
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39
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40 exit(0);
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41 }
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42