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 */