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53 lines
1.1 KiB
53 lines
1.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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#ifndef _POWERPC_PMI_H |
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#define _POWERPC_PMI_H |
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/* |
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* Definitions for talking with PMI device on PowerPC |
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* |
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* PMI (Platform Management Interrupt) is a way to communicate |
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* with the BMC (Baseboard Management Controller) via interrupts. |
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* Unlike IPMI it is bidirectional and has a low latency. |
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* |
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* (C) Copyright IBM Deutschland Entwicklung GmbH 2005 |
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* |
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* Author: Christian Krafft <[email protected]> |
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*/ |
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#ifdef __KERNEL__ |
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#define PMI_TYPE_FREQ_CHANGE 0x01 |
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#define PMI_TYPE_POWER_BUTTON 0x02 |
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#define PMI_READ_TYPE 0 |
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#define PMI_READ_DATA0 1 |
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#define PMI_READ_DATA1 2 |
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#define PMI_READ_DATA2 3 |
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#define PMI_WRITE_TYPE 4 |
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#define PMI_WRITE_DATA0 5 |
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#define PMI_WRITE_DATA1 6 |
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#define PMI_WRITE_DATA2 7 |
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#define PMI_ACK 0x80 |
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#define PMI_TIMEOUT 100 |
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typedef struct { |
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u8 type; |
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u8 data0; |
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u8 data1; |
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u8 data2; |
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} pmi_message_t; |
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struct pmi_handler { |
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struct list_head node; |
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u8 type; |
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void (*handle_pmi_message) (pmi_message_t); |
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}; |
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int pmi_register_handler(struct pmi_handler *); |
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void pmi_unregister_handler(struct pmi_handler *); |
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int pmi_send_message(pmi_message_t); |
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#endif /* __KERNEL__ */ |
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#endif /* _POWERPC_PMI_H */
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