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 &xen_acpi_notify_hypervisor_sleep); 64 acpi_os_set_prepare_extended_sleep( 65 &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