Merge tag 'for-upstream' of git://repo.or.cz/qemu/kevin into staging
[qemu.git] / include / hw / acpi / generic_event_device.h
1 /*
2 *
3 * Copyright (c) 2018 Intel Corporation
4 * Copyright (c) 2019 Huawei Technologies R & D (UK) Ltd
5 * Written by Samuel Ortiz, Shameer Kolothum
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2 or later, as published by the Free Software Foundation.
10 *
11 * The ACPI Generic Event Device (GED) is a hardware-reduced specific
12 * device[ACPI v6.1 Section 5.6.9] that handles all platform events,
13 * including the hotplug ones. Generic Event Device allows platforms
14 * to handle interrupts in ACPI ASL statements. It follows a very
15 * similar approach like the _EVT method from GPIO events. All
16 * interrupts are listed in _CRS and the handler is written in _EVT
17 * method. Here, we use a single interrupt for the GED device, relying
18 * on IO memory region to communicate the type of device affected by
19 * the interrupt. This way, we can support up to 32 events with a
20 * unique interrupt.
21 *
22 * Here is an example.
23 *
24 * Device (\_SB.GED)
25 * {
26 * Name (_HID, "ACPI0013")
27 * Name (_UID, Zero)
28 * Name (_CRS, ResourceTemplate ()
29 * {
30 * Interrupt (ResourceConsumer, Edge, ActiveHigh, Exclusive, ,, )
31 * {
32 * 0x00000029,
33 * }
34 * })
35 * OperationRegion (EREG, SystemMemory, 0x09080000, 0x04)
36 * Field (EREG, DWordAcc, NoLock, WriteAsZeros)
37 * {
38 * ESEL, 32
39 * }
40 *
41 * Method (_EVT, 1, Serialized) // _EVT: Event
42 * {
43 * Local0 = ESEL // ESEL = IO memory region which specifies the
44 * // device type.
45 * If (((Local0 & One) == One))
46 * {
47 * MethodEvent1()
48 * }
49 * If ((Local0 & 0x2) == 0x2)
50 * {
51 * MethodEvent2()
52 * }
53 * ...
54 * }
55 * }
56 *
57 */
58
59 #ifndef HW_ACPI_GENERIC_EVENT_DEVICE_H
60 #define HW_ACPI_GENERIC_EVENT_DEVICE_H
61
62 #include "hw/sysbus.h"
63 #include "hw/acpi/memory_hotplug.h"
64 #include "hw/acpi/ghes.h"
65 #include "qom/object.h"
66
67 #define ACPI_POWER_BUTTON_DEVICE "PWRB"
68
69 #define TYPE_ACPI_GED "acpi-ged"
70 OBJECT_DECLARE_SIMPLE_TYPE(AcpiGedState, ACPI_GED)
71
72 #define TYPE_ACPI_GED_X86 "acpi-ged-x86"
73
74 #define ACPI_GED_EVT_SEL_OFFSET 0x0
75 #define ACPI_GED_EVT_SEL_LEN 0x4
76
77 #define ACPI_GED_REG_SLEEP_CTL 0x00
78 #define ACPI_GED_REG_SLEEP_STS 0x01
79 #define ACPI_GED_REG_RESET 0x02
80 #define ACPI_GED_REG_COUNT 0x03
81
82 /* ACPI_GED_REG_RESET value for reset*/
83 #define ACPI_GED_RESET_VALUE 0x42
84
85 /* ACPI_GED_REG_SLEEP_CTL.SLP_TYP value for S5 (aka poweroff) */
86 #define ACPI_GED_SLP_TYP_S5 0x05
87
88 #define GED_DEVICE "GED"
89 #define AML_GED_EVT_REG "EREG"
90 #define AML_GED_EVT_SEL "ESEL"
91
92 /*
93 * Platforms need to specify the GED event bitmap
94 * to describe what kind of events they want to support
95 * through GED.
96 */
97 #define ACPI_GED_MEM_HOTPLUG_EVT 0x1
98 #define ACPI_GED_PWR_DOWN_EVT 0x2
99 #define ACPI_GED_NVDIMM_HOTPLUG_EVT 0x4
100
101 typedef struct GEDState {
102 MemoryRegion evt;
103 MemoryRegion regs;
104 uint32_t sel;
105 } GEDState;
106
107 struct AcpiGedState {
108 SysBusDevice parent_obj;
109 MemHotplugState memhp_state;
110 MemoryRegion container_memhp;
111 GEDState ged_state;
112 uint32_t ged_event_bitmap;
113 qemu_irq irq;
114 AcpiGhesState ghes_state;
115 };
116
117 void build_ged_aml(Aml *table, const char* name, HotplugHandler *hotplug_dev,
118 uint32_t ged_irq, AmlRegionSpace rs, hwaddr ged_base);
119 void acpi_dsdt_add_power_button(Aml *scope);
120
121 #endif