1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/* $OpenBSD: aptest.c,v 1.2 1996/12/21 22:23:39 millert Exp $ */
/*
* Copyright 1994 Doug Anson, danson@lgc.com & David Holland, davidh@use.com
*
* Author: Doug Anson (danson@lgc.com)
* Date : 2/21/94
* Modifed: David Holland (davidh@use.com)
* Log:
* DWH - Changed names/added comments 2/23/94
* DWH - Removed annoying delays. 2/23/94
*
* This program test the fb aperture driver by 'cheating'
* it uses the aperture driver to access/read the main
* system BIOS header
*
* Copyright notice:
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Doug Anson, and David Holland be used in
* advertising or publicity pertaining to distribution of the software
* Doug Anson, and David Holland make no * representations about the
* suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
* Disclaimer:
* DOUG ANSON, AND DAVID HOLLAND DISCLAIMS ALL WARRIENTS WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY, AND FITNESS,
* IN NO EVENT SHALL DOUG ANSON, OR DAVID HOLLAND BE LIABLE FOR ANY SPECIAL,
* INDIRECT, OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM
* USAGE OF THIS SOFTWARE.
*/
/*
* linear framebuffer aperture driver test program
*/
/*
* Id
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#if !defined(sun)
extern void exit(int);
extern caddr_t mmap();
extern int close();
extern int munmap();
#endif
/* framebuffer access defines */
#define AP_DEV "/dev/xf86" /* framebuffer apperture device */
#define PADDR 0xa0000 /* offset from fbmem base */
#define BUF_LENGTH 0x1000 /* length in bytes -- ignored */
/* debug testing defines */
#define START_INDEX 0 /* display starting index(>=0)*/
#define STOP_INDEX 80 /* display stopping index */
#define INCR 1 /* display increment */
/* main program */
int main(int argc,char **argv)
{
caddr_t addr = (caddr_t)0;
int fb_dev;
long start = START_INDEX;
long stop = STOP_INDEX;
int i;
/* open the framebuffer device */
fb_dev = open (AP_DEV,O_RDWR);
if (fb_dev < 0)
{
/* failed to open framebuffer driver */
printf("ERROR: failed to open %s\n",AP_DEV);
perror("ERROR: open()");
exit(1);
}
/* memory map the framebuffer */
addr = (caddr_t)mmap((caddr_t)0,BUF_LENGTH,PROT_READ|PROT_WRITE,MAP_SHARED,
fb_dev,(off_t)PADDR);
if (addr == (caddr_t)-1)
{
/* failed to memory map framebuffer driver */
printf("ERROR: failed to mmap [0x%x ,size=%d bytes)\n",
PADDR,BUF_LENGTH);
perror("ERROR: mmap()");
close(fb_dev);
exit(1);
}
else
{
/* frame buffer mapped */
close(fb_dev);
printf("NOTICE: BIOS mapped [0x%x ,size=%d) to addr=0x%x...\n",
PADDR,BUF_LENGTH,(int)addr);
/* display the buffer */
for(i=start;i<stop;i=i+INCR)
printf("%c",addr[i]);
/* printf("addr[%d]=%c\n",i,addr[i]);
*/
printf("\nDONE displaying memory contents (%ld bytes)\n",stop);
/* unmap and close */
printf("UNMAPPING [0x%x ,size=%d) to addr=0x%x... and closing...",
PADDR,BUF_LENGTH,(int)addr);
munmap(addr,BUF_LENGTH);
printf("DONE.\n");
printf("Exiting successful...\n");
exit(0);
}
return 1;
}
|
