1/*	$NetBSD: ioperm.c,v 1.1 2008/01/04 14:23:00 yamt Exp $	*/
2
3/*-
4 * Copyright (c)2008 YAMAMOTO Takashi,
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30#ifndef lint
31__RCSID("$NetBSD: ioperm.c,v 1.1 2008/01/04 14:23:00 yamt Exp $");
32#endif /* not lint */
33
34#include <err.h>
35#include <signal.h>
36#include <setjmp.h>
37#include <stdbool.h>
38#include <stdint.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <unistd.h>
43
44int i386_get_ioperm(unsigned long *);
45int i386_set_ioperm(unsigned long *);
46
47/* arbitrary port to test */
48#define	IO_TIMER1	0x40
49#define	TIMER_CNTR0	0
50#define	PORT	(IO_TIMER1+TIMER_CNTR0)
51
52static uint8_t
53inb(uint16_t port)
54{
55	uint8_t data;
56
57	__asm __volatile("inb %1, %0" : "=a"(data) : "id"(port));
58	return data;
59}
60
61sigjmp_buf env;
62int gotsig;
63
64static void
65sighandler(int sig)
66{
67
68	siglongjmp(env, sig);
69}
70
71static void
72try(const char *msg, bool success)
73{
74	int sig;
75
76	sig = sigsetjmp(env, 1);
77	if (sig == 0) {
78		inb(PORT);
79		if (!success) {
80			errx(EXIT_FAILURE, "%s: unexpected success of inb",
81			    msg);
82		}
83		return;
84	}
85	if (success) {
86		errx(EXIT_FAILURE, "%s: got signal %d\n", msg, sig);
87	}
88}
89
90int
91main(int argc, char *argv[])
92{
93	unsigned long buf[32];
94	unsigned long buf2[32];
95	int ret;
96	int i;
97
98	ret = i386_get_ioperm(buf);
99	if (ret == -1) {
100		err(EXIT_FAILURE, "get_ioperm 1");
101	}
102	for (i = 0; i < __arraycount(buf); i++) {
103		if (buf[i] != 0xffffffff) {
104			errx(EXIT_FAILURE, "buf[%d] == 0x%lx", i, buf[i]);
105		}
106	}
107
108	signal(SIGSEGV, sighandler);
109
110	try("1", false);
111	sleep(1);
112
113	memset(buf2, 0x00, sizeof(buf2));
114	strcpy((char *)buf2, "foobarbaz");
115	buf2[PORT / 8 / sizeof(unsigned long)] &=
116	    ~(1 << (PORT % (8 * sizeof(unsigned long))));
117	ret = i386_set_ioperm(buf2);
118	if (ret == -1) {
119		err(EXIT_FAILURE, "set_ioperm 1");
120	}
121	ret = i386_get_ioperm(buf);
122	if (ret == -1) {
123		err(EXIT_FAILURE, "get_ioperm 2");
124	}
125	if (memcmp(buf, buf2, sizeof(buf))) {
126		errx(EXIT_FAILURE, "iomap mismatch");
127	}
128
129	sleep(1);
130	try("2", true);
131	sleep(1);
132
133	buf2[PORT / 8 / sizeof(unsigned long)] |=
134	    (1 << (PORT % (8 * sizeof(unsigned long))));
135	ret = i386_set_ioperm(buf2);
136	if (ret == -1) {
137		err(EXIT_FAILURE, "set_ioperm 3");
138	}
139
140	sleep(1);
141	try("3", false);
142}
143