projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 */ |