1/*-
2 * Copyright (c) 2004 Hidetoshi Shimokawa
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: stable/11/stand/i386/libfirewire/dconsole.c 298826 2016-04-30 00:26:38Z pfg $");
28
29#include <stand.h>
30#include <bootstrap.h>
31#include <sys/param.h>
32#include <btxv86.h>
33#include <dev/dcons/dcons.h>
34
35void fw_enable(void);
36void fw_poll(void);
37
38static void	dconsole_probe(struct console *cp);
39static int	dconsole_init(int arg);
40static void	dconsole_putchar(int c);
41static int	dconsole_getchar(void);
42static int	dconsole_ischar(void);
43
44static int	dcons_started = 0;
45
46#define DCONS_BUF_SIZE (64*1024)
47static struct dcons_softc sc[DCONS_NPORT];
48uint32_t dcons_paddr;
49
50/* The buffer must be allocated in BSS becase:
51 *    - The dcons driver in the kernel is initialized before VM/pmap is
52 *	initialized, so that the buffer must be allocate in the region
53 *	that is mapped at the very early boot state.
54 *    - We expect identiy map only for regions before KERNLOAD
55 *	(i386:4MB amd64:1MB).
56 *    - It seems that heap in conventional memory(640KB) is not sufficient
57 *	and we move it to high address as LOADER_SUPPORT_BZIP2.
58 *    - BSS is placed in conventional memory.
59 */
60static char dcons_buffer[DCONS_BUF_SIZE + PAGE_SIZE];
61
62struct console dconsole = {
63    "dcons",
64    "dumb console port",
65    0,
66    dconsole_probe,
67    dconsole_init,
68    dconsole_putchar,
69    dconsole_getchar,
70    dconsole_ischar
71};
72
73#define DCONSOLE_AS_MULTI_CONSOLE	1
74
75static void
76dconsole_probe(struct console *cp)
77{
78    /* XXX check the BIOS equipment list? */
79    cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
80#if DCONSOLE_AS_MULTI_CONSOLE
81    dconsole_init(0);
82    cp->c_flags |= (C_ACTIVEIN | C_ACTIVEOUT);
83#endif
84}
85
86static int
87dconsole_init(int arg)
88{
89    char buf[16], *dbuf;
90    int size;
91
92    if (dcons_started && arg == 0)
93	return 0;
94    dcons_started = 1;
95
96    size = DCONS_BUF_SIZE;
97    dbuf = (char *)round_page((vm_offset_t)&dcons_buffer[0]);
98    dcons_paddr = VTOP(dbuf);
99    sprintf(buf, "0x%08x", dcons_paddr);
100    setenv("dcons.addr", buf, 1);
101
102    dcons_init((struct dcons_buf *)dbuf, size, sc);
103    sprintf(buf, "%d", size);
104    setenv("dcons.size", buf, 1);
105    fw_enable();
106    return(0);
107}
108
109static void
110dconsole_putchar(int c)
111{
112    dcons_putc(&sc[0], c);
113}
114
115static int
116dconsole_getchar(void)
117{
118    fw_poll();
119    return (dcons_checkc(&sc[0]));
120}
121
122static int
123dconsole_ischar(void)
124{
125    fw_poll();
126    return (dcons_ischar(&sc[0]));
127}
128