1#ifndef _POWERPC_PMI_H
2#define _POWERPC_PMI_H
3
4/*
5 * Definitions for talking with PMI device on PowerPC
6 *
7 * PMI (Platform Management Interrupt) is a way to communicate
8 * with the BMC (Baseboard Management Controller) via interrupts.
9 * Unlike IPMI it is bidirectional and has a low latency.
10 *
11 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
12 *
13 * Author: Christian Krafft <krafft@de.ibm.com>
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2, or (at your option)
18 * any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 */
29
30#ifdef __KERNEL__
31
32#include <asm/of_device.h>
33
34#define PMI_TYPE_FREQ_CHANGE	0x01
35#define PMI_READ_TYPE		0
36#define PMI_READ_DATA0		1
37#define PMI_READ_DATA1		2
38#define PMI_READ_DATA2		3
39#define PMI_WRITE_TYPE		4
40#define PMI_WRITE_DATA0		5
41#define PMI_WRITE_DATA1		6
42#define PMI_WRITE_DATA2		7
43
44#define PMI_ACK			0x80
45
46#define PMI_TIMEOUT		100
47
48typedef struct {
49	u8	type;
50	u8	data0;
51	u8	data1;
52	u8	data2;
53} pmi_message_t;
54
55struct pmi_handler {
56	struct list_head node;
57	u8 type;
58	void (*handle_pmi_message) (struct of_device *, pmi_message_t);
59};
60
61void pmi_register_handler(struct of_device *, struct pmi_handler *);
62void pmi_unregister_handler(struct of_device *, struct pmi_handler *);
63
64void pmi_send_message(struct of_device *, pmi_message_t);
65
66#endif /* __KERNEL__ */
67#endif /* _POWERPC_PMI_H */
68