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