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de6cc651 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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2 | #ifndef _POWERPC_PMI_H |
3 | #define _POWERPC_PMI_H | |
4 | ||
5 | /* | |
6 | * Definitions for talking with PMI device on PowerPC | |
7 | * | |
8 | * PMI (Platform Management Interrupt) is a way to communicate | |
9 | * with the BMC (Baseboard Management Controller) via interrupts. | |
10 | * Unlike IPMI it is bidirectional and has a low latency. | |
11 | * | |
12 | * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 | |
13 | * | |
14 | * Author: Christian Krafft <krafft@de.ibm.com> | |
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15 | */ |
16 | ||
17 | #ifdef __KERNEL__ | |
18 | ||
0e826643 | 19 | #define PMI_TYPE_FREQ_CHANGE 0x01 |
4795b780 | 20 | #define PMI_TYPE_POWER_BUTTON 0x02 |
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21 | #define PMI_READ_TYPE 0 |
22 | #define PMI_READ_DATA0 1 | |
23 | #define PMI_READ_DATA1 2 | |
24 | #define PMI_READ_DATA2 3 | |
25 | #define PMI_WRITE_TYPE 4 | |
26 | #define PMI_WRITE_DATA0 5 | |
27 | #define PMI_WRITE_DATA1 6 | |
28 | #define PMI_WRITE_DATA2 7 | |
29 | ||
30 | #define PMI_ACK 0x80 | |
31 | ||
32 | #define PMI_TIMEOUT 100 | |
33 | ||
34 | typedef struct { | |
35 | u8 type; | |
36 | u8 data0; | |
37 | u8 data1; | |
38 | u8 data2; | |
39 | } pmi_message_t; | |
40 | ||
41 | struct pmi_handler { | |
42 | struct list_head node; | |
43 | u8 type; | |
813f9072 | 44 | void (*handle_pmi_message) (pmi_message_t); |
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45 | }; |
46 | ||
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47 | int pmi_register_handler(struct pmi_handler *); |
48 | void pmi_unregister_handler(struct pmi_handler *); | |
0e826643 | 49 | |
813f9072 | 50 | int pmi_send_message(pmi_message_t); |
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51 | |
52 | #endif /* __KERNEL__ */ | |
53 | #endif /* _POWERPC_PMI_H */ |