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
  43#define ACPI_MEMORY_DEVICE_CLASS        "memory"
  44#define ACPI_MEMORY_DEVICE_HID          "PNP0C80"
  45#define ACPI_MEMORY_DEVICE_NAME         "Hotplug Mem Device"
  46
  47int xen_stub_memory_device_init(void);
  48void xen_stub_memory_device_exit(void);
  49
  50#define ACPI_PROCESSOR_CLASS            "processor"
  51#define ACPI_PROCESSOR_DEVICE_HID       "ACPI0007"
  52#define ACPI_PROCESSOR_DEVICE_NAME      "Processor"
  53
  54int xen_stub_processor_init(void);
  55void xen_stub_processor_exit(void);
  56
  57void xen_pcpu_hotplug_sync(void);
  58int xen_pcpu_id(uint32_t acpi_id);
  59
  60static inline int xen_acpi_get_pxm(acpi_handle h)
  61{
  62        unsigned long long pxm;
  63        acpi_status status;
  64        acpi_handle handle;
  65        acpi_handle phandle = h;
  66
  67        do {
  68                handle = phandle;
  69                status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
  70                if (ACPI_SUCCESS(status))
  71                        return pxm;
  72                status = acpi_get_parent(handle, &phandle);
  73        } while (ACPI_SUCCESS(status));
  74
  75        return -ENXIO;
  76}
  77
  78int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
  79                                     u32 pm1a_cnt, u32 pm1b_cnd);
  80int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,
  81                                     u32 val_a, u32 val_b);
  82
  83static inline int xen_acpi_suspend_lowlevel(void)
  84{
  85        /*
  86        * Xen will save and restore CPU context, so
  87        * we can skip that and just go straight to
  88        * the suspend.
  89        */
  90        acpi_enter_sleep_state(ACPI_STATE_S3);
  91        return 0;
  92}
  93
  94static inline void xen_acpi_sleep_register(void)
  95{
  96        if (xen_initial_domain()) {
  97                acpi_os_set_prepare_sleep(
  98                        &xen_acpi_notify_hypervisor_sleep);
  99                acpi_os_set_prepare_extended_sleep(
 100                        &xen_acpi_notify_hypervisor_extended_sleep);
 101
 102                acpi_suspend_lowlevel = xen_acpi_suspend_lowlevel;
 103        }
 104}
 105#else
 106static inline void xen_acpi_sleep_register(void)
 107{
 108}
 109#endif
 110
 111#endif  /* _XEN_ACPI_H */
 112