LXR qemu/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.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_int(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
  46struct IsaDma {
  47    Object parent;
  48};
  49
  50typedef enum {
  51    ISADMA_TRANSFER_VERIFY,
  52    ISADMA_TRANSFER_READ,
  53    ISADMA_TRANSFER_WRITE,
  54    ISADMA_TRANSFER_ILLEGAL,
  55} IsaDmaTransferMode;
  56
  57typedef int (*IsaDmaTransferHandler)(void *opaque, int nchan, int pos,
  58                                     int size);
  59
  60typedef struct IsaDmaClass {
  61    InterfaceClass parent;
  62
  63    IsaDmaTransferMode (*get_transfer_mode)(IsaDma *obj, int nchan);
  64    bool (*has_autoinitialization)(IsaDma *obj, int nchan);
  65    int (*read_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  66    int (*write_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  67    void (*hold_DREQ)(IsaDma *obj, int nchan);
  68    void (*release_DREQ)(IsaDma *obj, int nchan);
  69    void (*schedule)(IsaDma *obj);
  70    void (*register_channel)(IsaDma *obj, int nchan,
  71                             IsaDmaTransferHandler transfer_handler,
  72                             void *opaque);
  73} IsaDmaClass;
  74
  75typedef struct ISADeviceClass {
  76    DeviceClass parent_class;
  77} ISADeviceClass;
  78
  79struct ISABus {
  80    /*< private >*/
  81    BusState parent_obj;
  82    /*< public >*/
  83
  84    MemoryRegion *address_space;
  85    MemoryRegion *address_space_io;
  86    qemu_irq *irqs;
  87    IsaDma *dma[2];
  88};
  89
  90struct ISADevice {
  91    /*< private >*/
  92    DeviceState parent_obj;
  93    /*< public >*/
  94
  95    uint32_t isairq[2];
  96    int nirqs;
  97    int ioport_id;
  98};
  99
 100ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
 101                    MemoryRegion *address_space_io, Error **errp);
 102void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
 103qemu_irq isa_get_irq(ISADevice *dev, int isairq);
 104void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
 105void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16);
 106IsaDma *isa_get_dma(ISABus *bus, int nchan);
 107MemoryRegion *isa_address_space(ISADevice *dev);
 108MemoryRegion *isa_address_space_io(ISADevice *dev);
 109ISADevice *isa_create(ISABus *bus, const char *name);
 110ISADevice *isa_try_create(ISABus *bus, const char *name);
 111ISADevice *isa_create_simple(ISABus *bus, const char *name);
 112
 113ISADevice *isa_vga_init(ISABus *bus);
 114
 115/**
 116 * isa_register_ioport: Install an I/O port region on the ISA bus.
 117 *
 118 * Register an I/O port region via memory_region_add_subregion
 119 * inside the ISA I/O address space.
 120 *
 121 * @dev: the ISADevice against which these are registered; may be NULL.
 122 * @io: the #MemoryRegion being registered.
 123 * @start: the base I/O port.
 124 */
 125void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
 126
 127/**
 128 * isa_register_portio_list: Initialize a set of ISA io ports
 129 *
 130 * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
 131 * ports can be interleaved with I/O ports from other devices.  This
 132 * function makes it easy to create multiple MemoryRegions for a single
 133 * device and use the legacy portio routines.
 134 *
 135 * @dev: the ISADevice against which these are registered; may be NULL.
 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 */
 141void isa_register_portio_list(ISADevice *dev, 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/* i8257.c */
 151void DMA_init(ISABus *bus, int high_page_enable);
 152#endif
 153