include/asm-powerpc/pmi.h

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