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 | int xen_acpi_notify_hypervisor_sleep(u8 sleep_state, |
44 | u32 pm1a_cnt, u32 pm1b_cnd); |
45 | int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state, |
46 | u32 val_a, u32 val_b); |
47 | |
48 | static 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 | |
59 | static inline void xen_acpi_sleep_register(void) |
60 | { |
61 | if (xen_initial_domain()) { |
62 | acpi_os_set_prepare_sleep( |
63 | func: &xen_acpi_notify_hypervisor_sleep); |
64 | acpi_os_set_prepare_extended_sleep( |
65 | func: &xen_acpi_notify_hypervisor_extended_sleep); |
66 | |
67 | acpi_suspend_lowlevel = xen_acpi_suspend_lowlevel; |
68 | } |
69 | } |
70 | #else |
71 | static inline void xen_acpi_sleep_register(void) |
72 | { |
73 | } |
74 | #endif |
75 | |
76 | #endif /* _XEN_ACPI_H */ |
77 | |