LXR linux/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
  48typedef struct {
  49        u8      type;
  50        u8      data0;
  51        u8      data1;
  52        u8      data2;
  53} pmi_message_t;
  54
  55struct pmi_handler {
  56        struct list_head node;
  57        u8 type;
  58        void (*handle_pmi_message) (pmi_message_t);
  59};
  60
  61int pmi_register_handler(struct pmi_handler *);
  62void pmi_unregister_handler(struct pmi_handler *);
  63
  64int pmi_send_message(pmi_message_t);
  65
  66#endif /* __KERNEL__ */
  67#endif /* _POWERPC_PMI_H */
  68