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
  47 int xen_stub_memory_device_init(void);
  48 void 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
  54 int xen_stub_processor_init(void);
  55 void xen_stub_processor_exit(void);
  56
  57 void xen_pcpu_hotplug_sync(void);
  58 int xen_pcpu_id(uint32_t acpi_id);
  59
  60 static 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
  78 int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
  79                                      u32 pm1a_cnt, u32 pm1b_cnd);
  80 int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,
  81                                      u32 val_a, u32 val_b);
  82
  83 static 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
  94 static 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
 106 static inline void xen_acpi_sleep_register(void)
 107 {
 108 }
 109 #endif
 110
 111 #endif  /* _XEN_ACPI_H */