LXR linux/include/xen/acpi.h

   1/******************************************************************************
   2 * acpi.h
   3 * acpi file for domain 0 kernel
   4 *
   5 * Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
   6 * Copyright (c) 2011 Yu Ke <ke.yu@intel.com>
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License version 2
  10 * as published by the Free Software Foundation; or, when distributed
  11 * separately from the Linux kernel or incorporated into other
  12 * software packages, subject to the following license:
  13 *
  14 * Permission is hereby granted, free of charge, to any person obtaining a copy
  15 * of this source file (the "Software"), to deal in the Software without
  16 * restriction, including without limitation the rights to use, copy, modify,
  17 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
  18 * and to permit persons to whom the Software is furnished to do so, subject to
  19 * the following conditions:
  20 *
  21 * The above copyright notice and this permission notice shall be included in
  22 * all copies or substantial portions of the Software.
  23 *
  24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  27 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  29 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  30 * IN THE SOFTWARE.
  31 */
  32
  33#ifndef _XEN_ACPI_H
  34#define _XEN_ACPI_H
  35
  36#include <linux/types.h>
  37
  38#ifdef CONFIG_XEN_DOM0
  39#include <asm/xen/hypervisor.h>
  40#include <xen/xen.h>
  41#include <linux/acpi.h>
  42
  43int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
  44                                     u32 pm1a_cnt, u32 pm1b_cnd);
  45int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,
  46                                     u32 val_a, u32 val_b);
  47
  48static inline int xen_acpi_suspend_lowlevel(void)
  49{
  50        /*
  51        * Xen will save and restore CPU context, so
  52        * we can skip that and just go straight to
  53        * the suspend.
  54        */
  55        acpi_enter_sleep_state(ACPI_STATE_S3);
  56        return 0;
  57}
  58
  59static inline void xen_acpi_sleep_register(void)
  60{
  61        if (xen_initial_domain()) {
  62                acpi_os_set_prepare_sleep(
  63                        &xen_acpi_notify_hypervisor_sleep);
  64                acpi_os_set_prepare_extended_sleep(
  65                        &xen_acpi_notify_hypervisor_extended_sleep);
  66
  67                acpi_suspend_lowlevel = xen_acpi_suspend_lowlevel;
  68        }
  69}
  70#else
  71static inline void xen_acpi_sleep_register(void)
  72{
  73}
  74#endif
  75
  76#endif  /* _XEN_ACPI_H */
  77