1 /*
2 * Copyright (C) 2002-2004
3 * Hidetoshi Shimokawa. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 *
16 * This product includes software developed by Hidetoshi Shimokawa.
17 *
18 * 4. Neither the name of the author nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $Id: dcons.h,v 1.15 2003/10/23 15:05:31 simokawa Exp $
35 * $FreeBSD: src/sys/dev/dcons/dcons.h,v 1.4 2004/10/22 15:03:22 simokawa Exp $
36 * $DragonFly: src/sys/dev/misc/dcons/dcons.h,v 1.2 2004/10/25 13:53:26 simokawa Exp $
37 */
38
39 #if defined(_KERNEL) || defined(_BOOT)
40 #define V volatile
41 #else
42 #define V
43 #endif
44
45 #define DCONS_NPORT 2
46 #define DCONS_CON 0
47 #define DCONS_GDB 1
48
49 struct dcons_buf {
50 #define DCONS_VERSION 2
51 V u_int32_t version;
52 V u_int32_t ooffset[DCONS_NPORT];
53 V u_int32_t ioffset[DCONS_NPORT];
54 V u_int32_t osize[DCONS_NPORT];
55 V u_int32_t isize[DCONS_NPORT];
56 #define DCONS_MAGIC 0x64636f6e /* "dcon" */
57 V u_int32_t magic;
58 #define DCONS_GEN_SHIFT (24)
59 #define DCONS_GEN_MASK (0xff)
60 #define DCONS_POS_MASK ((1<< DCONS_GEN_SHIFT) - 1)
61 V u_int32_t optr[DCONS_NPORT];
62 V u_int32_t iptr[DCONS_NPORT];
63 V char buf[0];
64 };
65
66 #define DCONS_CSR_VAL_VER 0x64636f /* "dco" */
67 #define DCONS_CSR_KEY_HI 0x3a
68 #define DCONS_CSR_KEY_LO 0x3b
69
70 #define DCONS_HEADER_SIZE sizeof(struct dcons_buf)
71 #define DCONS_MAKE_PTR(x) htonl(((x)->gen << DCONS_GEN_SHIFT) | (x)->pos)
72 #define DCONS_NEXT_GEN(x) (((x) + 1) & DCONS_GEN_MASK)
73
74 struct dcons_ch {
75 u_int32_t size;
76 u_int32_t gen;
77 u_int32_t pos;
78 #if defined(_KERNEL) || defined(_BOOT)
79 V u_int32_t *ptr;
80 V char *buf;
81 #else
82 off_t buf;
83 #endif
84 };
85
86 #define KEY_CTRLB 2 /* ^B */
87 #define KEY_CR 13 /* CR '\r' */
88 #define KEY_TILDE 126 /* ~ */
89 #define STATE0 0
90 #define STATE1 1
91 #define STATE2 2
92
93 #if defined(_KERNEL) || defined(_BOOT)
94 struct dcons_softc {
95 struct dcons_ch o, i;
96 int brk_state;
97 #define DC_GDB 1
98 int flags;
99 void *dev;
100 };
101
102 int dcons_checkc(struct dcons_softc *);
103 int dcons_ischar(struct dcons_softc *);
104 void dcons_putc(struct dcons_softc *, int);
105 int dcons_load_buffer(struct dcons_buf *, int, struct dcons_softc *);
106 void dcons_init(struct dcons_buf *, int, struct dcons_softc *);
107 #endif
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