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 */