hw/intc/armv7m_nvic: Provide default "reset the system" behaviour for SYSRESETREQ
[qemu.git] / include / hw / isa / isa.h
1 #ifndef HW_ISA_H
2 #define HW_ISA_H
3
4 /* ISA bus */
5
6 #include "exec/memory.h"
7 #include "exec/ioport.h"
8 #include "hw/qdev-core.h"
9
10 #define ISA_NUM_IRQS 16
11
12 #define TYPE_ISA_DEVICE "isa-device"
13 #define ISA_DEVICE(obj) \
14 OBJECT_CHECK(ISADevice, (obj), TYPE_ISA_DEVICE)
15 #define ISA_DEVICE_CLASS(klass) \
16 OBJECT_CLASS_CHECK(ISADeviceClass, (klass), TYPE_ISA_DEVICE)
17 #define ISA_DEVICE_GET_CLASS(obj) \
18 OBJECT_GET_CLASS(ISADeviceClass, (obj), TYPE_ISA_DEVICE)
19
20 #define TYPE_ISA_BUS "ISA"
21 #define ISA_BUS(obj) OBJECT_CHECK(ISABus, (obj), TYPE_ISA_BUS)
22
23 #define TYPE_APPLE_SMC "isa-applesmc"
24 #define APPLESMC_MAX_DATA_LENGTH 32
25 #define APPLESMC_PROP_IO_BASE "iobase"
26
27 static inline uint16_t applesmc_port(void)
28 {
29 Object *obj = object_resolve_path_type("", TYPE_APPLE_SMC, NULL);
30
31 if (obj) {
32 return object_property_get_uint(obj, APPLESMC_PROP_IO_BASE, NULL);
33 }
34 return 0;
35 }
36
37 #define TYPE_ISADMA "isa-dma"
38
39 #define ISADMA_CLASS(klass) \
40 OBJECT_CLASS_CHECK(IsaDmaClass, (klass), TYPE_ISADMA)
41 #define ISADMA_GET_CLASS(obj) \
42 OBJECT_GET_CLASS(IsaDmaClass, (obj), TYPE_ISADMA)
43 #define ISADMA(obj) \
44 INTERFACE_CHECK(IsaDma, (obj), TYPE_ISADMA)
45
46 typedef enum {
47 ISADMA_TRANSFER_VERIFY,
48 ISADMA_TRANSFER_READ,
49 ISADMA_TRANSFER_WRITE,
50 ISADMA_TRANSFER_ILLEGAL,
51 } IsaDmaTransferMode;
52
53 typedef int (*IsaDmaTransferHandler)(void *opaque, int nchan, int pos,
54 int size);
55
56 typedef struct IsaDmaClass {
57 InterfaceClass parent;
58
59 bool (*has_autoinitialization)(IsaDma *obj, int nchan);
60 int (*read_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
61 int (*write_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
62 void (*hold_DREQ)(IsaDma *obj, int nchan);
63 void (*release_DREQ)(IsaDma *obj, int nchan);
64 void (*schedule)(IsaDma *obj);
65 void (*register_channel)(IsaDma *obj, int nchan,
66 IsaDmaTransferHandler transfer_handler,
67 void *opaque);
68 } IsaDmaClass;
69
70 typedef struct ISADeviceClass {
71 DeviceClass parent_class;
72 void (*build_aml)(ISADevice *dev, Aml *scope);
73 } ISADeviceClass;
74
75 struct ISABus {
76 /*< private >*/
77 BusState parent_obj;
78 /*< public >*/
79
80 MemoryRegion *address_space;
81 MemoryRegion *address_space_io;
82 qemu_irq *irqs;
83 IsaDma *dma[2];
84 };
85
86 struct ISADevice {
87 /*< private >*/
88 DeviceState parent_obj;
89 /*< public >*/
90
91 int8_t isairq[2]; /* -1 = unassigned */
92 int nirqs;
93 int ioport_id;
94 };
95
96 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
97 MemoryRegion *address_space_io, Error **errp);
98 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
99 qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq);
100 void isa_init_irq(ISADevice *dev, qemu_irq *p, unsigned isairq);
101 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq);
102 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16);
103 IsaDma *isa_get_dma(ISABus *bus, int nchan);
104 MemoryRegion *isa_address_space(ISADevice *dev);
105 MemoryRegion *isa_address_space_io(ISADevice *dev);
106 ISADevice *isa_new(const char *name);
107 ISADevice *isa_try_new(const char *name);
108 bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp);
109 ISADevice *isa_create_simple(ISABus *bus, const char *name);
110
111 ISADevice *isa_vga_init(ISABus *bus);
112 void isa_build_aml(ISABus *bus, Aml *scope);
113
114 /**
115 * isa_register_ioport: Install an I/O port region on the ISA bus.
116 *
117 * Register an I/O port region via memory_region_add_subregion
118 * inside the ISA I/O address space.
119 *
120 * @dev: the ISADevice against which these are registered; may be NULL.
121 * @io: the #MemoryRegion being registered.
122 * @start: the base I/O port.
123 */
124 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
125
126 /**
127 * isa_register_portio_list: Initialize a set of ISA io ports
128 *
129 * Several ISA devices have many dis-joint I/O ports. Worse, these I/O
130 * ports can be interleaved with I/O ports from other devices. This
131 * function makes it easy to create multiple MemoryRegions for a single
132 * device and use the legacy portio routines.
133 *
134 * @dev: the ISADevice against which these are registered; may be NULL.
135 * @piolist: the PortioList associated with the io ports
136 * @start: the base I/O port against which the portio->offset is applied.
137 * @portio: the ports, sorted by offset.
138 * @opaque: passed into the portio callbacks.
139 * @name: passed into memory_region_init_io.
140 */
141 void isa_register_portio_list(ISADevice *dev,
142 PortioList *piolist,
143 uint16_t start,
144 const MemoryRegionPortio *portio,
145 void *opaque, const char *name);
146
147 static inline ISABus *isa_bus_from_device(ISADevice *d)
148 {
149 return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
150 }
151
152 #define TYPE_PIIX4_PCI_DEVICE "piix4-isa"
153
154 #endif