mca_machdep.h revision 1.5 
1/*	$NetBSD: mca_machdep.h,v 1.5 2001/04/22 11:52:18 jdolecek Exp $	*/
2
3/*
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * Copyright (c) 1999 Scott D. Telford.  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 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#ifndef _I386_MCA_MACHDEP_H_
31#define _I386_MCA_MACHDEP_H_
32
33/*
34 * i386-specific definitions for MCA autoconfiguration.
35 */
36
37extern struct i386_bus_dma_tag mca_bus_dma_tag;
38
39/* set to 1 if MCA bus is detected */
40extern int MCA_system;
41
42int	mca_nmi(void);
43
44/*
45 * Types provided to machine-independent MCA code.
46 */
47struct i386_mca_chipset {
48        void * /*struct mca_dma_state*/ ic_dmastate;
49};
50
51typedef struct i386_mca_chipse *mca_chipset_tag_t;
52typedef int mca_intr_handle_t;
53
54/* System Configuration Block - this info is returned by the BIOS call */
55struct ps2_sys_config {
56	u_int16_t	count;
57	u_int8_t	model;
58	u_int8_t	submodel;
59	u_int8_t	bios_rev;
60	u_int8_t	feature;
61#define FEATURE_RESV	0x01	/* Reserved				*/
62#define FEATURE_MCABUS	0x02	/* MicroChannel Architecture		*/
63#define FEATURE_EBDA	0x04	/* Extended BIOS data area allocated	*/
64#define FEATURE_WAITEV	0x08	/* Wait for external event is supported	*/
65#define FEATURE_KBDINT	0x10	/* Keyboard intercept called by Int 09h	*/
66#define FEATURE_RTC	0x20	/* Real-time clock present		*/
67#define FEATURE_IC2	0x40	/* Second interrupt chip present	*/
68#define FEATURE_DMA3	0x80	/* DMA channel 3 used by hard disk BIOS	*/
69	u_int8_t	pad[10];
70} __attribute__ ((packed));
71
72/*
73 * Functions provided to machine-independent MCA code.
74 */
75struct mcabus_attach_args;
76
77void	mca_attach_hook(struct device *, struct device *,
78		struct mcabus_attach_args *);
79const struct evcnt *mca_intr_evcnt(mca_chipset_tag_t, mca_intr_handle_t);
80void	*mca_intr_establish(mca_chipset_tag_t, mca_intr_handle_t,
81		int, int (*)(void *), void *);
82void	mca_intr_disestablish(mca_chipset_tag_t, void *);
83int	mca_conf_read(mca_chipset_tag_t, int, int);
84void	mca_conf_write(mca_chipset_tag_t, int, int, int);
85void	mca_busprobe(void);
86
87/*
88 * These two are used to light disk busy LED on PS/2 during disk operations.
89 */
90void	mca_disk_busy(void);
91void	mca_disk_unbusy(void);
92
93/* MCA register addresses for IBM PS/2 */
94
95#define PS2_SYS_CTL_A		0x92	/* PS/2 System Control Port A */
96#define MCA_MB_SETUP_REG	0x94	/* Motherboard setup register */
97#define MCA_ADAP_SETUP_REG	0x96	/* Adapter setup register */
98#define MCA_POS_REG_BASE	0x100	/* POS registers base address */
99#define MCA_POS_REG_SIZE	8	/* POS registers window size */
100
101#define MCA_POS_REG(n)		(0x100+(n))	/* POS registers 0-7 */
102
103/* Adapter setup register bits */
104
105#define MCA_ADAP_SET		0x08	/* Adapter setup mode */
106#define MCA_ADAP_CHR		0x80	/* Adapter channel reset */
107
108#endif /* _I386_MCA_MACHDEP_H_ */
109