1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun #ifndef _POWERPC_PMI_H 3*4882a593Smuzhiyun #define _POWERPC_PMI_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /* 6*4882a593Smuzhiyun * Definitions for talking with PMI device on PowerPC 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * PMI (Platform Management Interrupt) is a way to communicate 9*4882a593Smuzhiyun * with the BMC (Baseboard Management Controller) via interrupts. 10*4882a593Smuzhiyun * Unlike IPMI it is bidirectional and has a low latency. 11*4882a593Smuzhiyun * 12*4882a593Smuzhiyun * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 13*4882a593Smuzhiyun * 14*4882a593Smuzhiyun * Author: Christian Krafft <krafft@de.ibm.com> 15*4882a593Smuzhiyun */ 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #ifdef __KERNEL__ 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun #define PMI_TYPE_FREQ_CHANGE 0x01 20*4882a593Smuzhiyun #define PMI_TYPE_POWER_BUTTON 0x02 21*4882a593Smuzhiyun #define PMI_READ_TYPE 0 22*4882a593Smuzhiyun #define PMI_READ_DATA0 1 23*4882a593Smuzhiyun #define PMI_READ_DATA1 2 24*4882a593Smuzhiyun #define PMI_READ_DATA2 3 25*4882a593Smuzhiyun #define PMI_WRITE_TYPE 4 26*4882a593Smuzhiyun #define PMI_WRITE_DATA0 5 27*4882a593Smuzhiyun #define PMI_WRITE_DATA1 6 28*4882a593Smuzhiyun #define PMI_WRITE_DATA2 7 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun #define PMI_ACK 0x80 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun #define PMI_TIMEOUT 100 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun typedef struct { 35*4882a593Smuzhiyun u8 type; 36*4882a593Smuzhiyun u8 data0; 37*4882a593Smuzhiyun u8 data1; 38*4882a593Smuzhiyun u8 data2; 39*4882a593Smuzhiyun } pmi_message_t; 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun struct pmi_handler { 42*4882a593Smuzhiyun struct list_head node; 43*4882a593Smuzhiyun u8 type; 44*4882a593Smuzhiyun void (*handle_pmi_message) (pmi_message_t); 45*4882a593Smuzhiyun }; 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun int pmi_register_handler(struct pmi_handler *); 48*4882a593Smuzhiyun void pmi_unregister_handler(struct pmi_handler *); 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun int pmi_send_message(pmi_message_t); 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun #endif /* __KERNEL__ */ 53*4882a593Smuzhiyun #endif /* _POWERPC_PMI_H */ 54