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 */ 112