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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 | ||
0e826643 CK |
32 | #define PMI_TYPE_FREQ_CHANGE 0x01 |
33 | #define PMI_READ_TYPE 0 | |
34 | #define PMI_READ_DATA0 1 | |
35 | #define PMI_READ_DATA1 2 | |
36 | #define PMI_READ_DATA2 3 | |
37 | #define PMI_WRITE_TYPE 4 | |
38 | #define PMI_WRITE_DATA0 5 | |
39 | #define PMI_WRITE_DATA1 6 | |
40 | #define PMI_WRITE_DATA2 7 | |
41 | ||
42 | #define PMI_ACK 0x80 | |
43 | ||
44 | #define PMI_TIMEOUT 100 | |
45 | ||
46 | typedef struct { | |
47 | u8 type; | |
48 | u8 data0; | |
49 | u8 data1; | |
50 | u8 data2; | |
51 | } pmi_message_t; | |
52 | ||
53 | struct pmi_handler { | |
54 | struct list_head node; | |
55 | u8 type; | |
813f9072 | 56 | void (*handle_pmi_message) (pmi_message_t); |
0e826643 CK |
57 | }; |
58 | ||
813f9072 CK |
59 | int pmi_register_handler(struct pmi_handler *); |
60 | void pmi_unregister_handler(struct pmi_handler *); | |
0e826643 | 61 | |
813f9072 | 62 | int pmi_send_message(pmi_message_t); |
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63 | |
64 | #endif /* __KERNEL__ */ | |
65 | #endif /* _POWERPC_PMI_H */ |