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
27static 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
46typedef enum {
47 ISADMA_TRANSFER_VERIFY,
48 ISADMA_TRANSFER_READ,
49 ISADMA_TRANSFER_WRITE,
50 ISADMA_TRANSFER_ILLEGAL,
51} IsaDmaTransferMode;
52
53typedef int (*IsaDmaTransferHandler)(void *opaque, int nchan, int pos,
54 int size);
55
56typedef struct IsaDmaClass {
57 InterfaceClass parent;
58
59 IsaDmaTransferMode (*get_transfer_mode)(IsaDma *obj, int nchan);
60 bool (*has_autoinitialization)(IsaDma *obj, int nchan);
61 int (*read_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
62 int (*write_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
63 void (*hold_DREQ)(IsaDma *obj, int nchan);
64 void (*release_DREQ)(IsaDma *obj, int nchan);
65 void (*schedule)(IsaDma *obj);
66 void (*register_channel)(IsaDma *obj, int nchan,
67 IsaDmaTransferHandler transfer_handler,
68 void *opaque);
69} IsaDmaClass;
70
71typedef struct ISADeviceClass {
72 DeviceClass parent_class;
73} ISADeviceClass;
74
75struct 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
86struct ISADevice {
87 /*< private >*/
88 DeviceState parent_obj;
89 /*< public >*/
90
91 uint32_t isairq[2];
92 int nirqs;
93 int ioport_id;
94};
95
96ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
97 MemoryRegion *address_space_io, Error **errp);
98void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
99qemu_irq isa_get_irq(ISADevice *dev, int isairq);
100void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
101void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, int isairq);
102void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16);
103IsaDma *isa_get_dma(ISABus *bus, int nchan);
104MemoryRegion *isa_address_space(ISADevice *dev);
105MemoryRegion *isa_address_space_io(ISADevice *dev);
106ISADevice *isa_create(ISABus *bus, const char *name);
107ISADevice *isa_try_create(ISABus *bus, const char *name);
108ISADevice *isa_create_simple(ISABus *bus, const char *name);
109
110ISADevice *isa_vga_init(ISABus *bus);
111
112/**
113 * isa_register_ioport: Install an I/O port region on the ISA bus.
114 *
115 * Register an I/O port region via memory_region_add_subregion
116 * inside the ISA I/O address space.
117 *
118 * @dev: the ISADevice against which these are registered; may be NULL.
119 * @io: the #MemoryRegion being registered.
120 * @start: the base I/O port.
121 */
122void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
123
124/**
125 * isa_register_portio_list: Initialize a set of ISA io ports
126 *
127 * Several ISA devices have many dis-joint I/O ports. Worse, these I/O
128 * ports can be interleaved with I/O ports from other devices. This
129 * function makes it easy to create multiple MemoryRegions for a single
130 * device and use the legacy portio routines.
131 *
132 * @dev: the ISADevice against which these are registered; may be NULL.
133 * @piolist: the PortioList associated with the io ports
134 * @start: the base I/O port against which the portio->offset is applied.
135 * @portio: the ports, sorted by offset.
136 * @opaque: passed into the portio callbacks.
137 * @name: passed into memory_region_init_io.
138 */
139void isa_register_portio_list(ISADevice *dev,
140 PortioList *piolist,
141 uint16_t start,
142 const MemoryRegionPortio *portio,
143 void *opaque, const char *name);
144
145static inline ISABus *isa_bus_from_device(ISADevice *d)
146{
147 return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
148}
149
150#endif
151