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/ioport.h"
   7#include "exec/memory.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
  37typedef struct ISADeviceClass {
  38    DeviceClass parent_class;
  39} ISADeviceClass;
  40
  41struct ISABus {
  42    /*< private >*/
  43    BusState parent_obj;
  44    /*< public >*/
  45
  46    MemoryRegion *address_space;
  47    MemoryRegion *address_space_io;
  48    qemu_irq *irqs;
  49};
  50
  51struct ISADevice {
  52    /*< private >*/
  53    DeviceState parent_obj;
  54    /*< public >*/
  55
  56    uint32_t isairq[2];
  57    int nirqs;
  58    int ioport_id;
  59};
  60
  61ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
  62                    MemoryRegion *address_space_io);
  63void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
  64qemu_irq isa_get_irq(ISADevice *dev, int isairq);
  65void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
  66MemoryRegion *isa_address_space(ISADevice *dev);
  67MemoryRegion *isa_address_space_io(ISADevice *dev);
  68ISADevice *isa_create(ISABus *bus, const char *name);
  69ISADevice *isa_try_create(ISABus *bus, const char *name);
  70ISADevice *isa_create_simple(ISABus *bus, const char *name);
  71
  72ISADevice *isa_vga_init(ISABus *bus);
  73
  74/**
  75 * isa_register_ioport: Install an I/O port region on the ISA bus.
  76 *
  77 * Register an I/O port region via memory_region_add_subregion
  78 * inside the ISA I/O address space.
  79 *
  80 * @dev: the ISADevice against which these are registered; may be NULL.
  81 * @io: the #MemoryRegion being registered.
  82 * @start: the base I/O port.
  83 */
  84void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
  85
  86/**
  87 * isa_register_portio_list: Initialize a set of ISA io ports
  88 *
  89 * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
  90 * ports can be interleaved with I/O ports from other devices.  This
  91 * function makes it easy to create multiple MemoryRegions for a single
  92 * device and use the legacy portio routines.
  93 *
  94 * @dev: the ISADevice against which these are registered; may be NULL.
  95 * @start: the base I/O port against which the portio->offset is applied.
  96 * @portio: the ports, sorted by offset.
  97 * @opaque: passed into the portio callbacks.
  98 * @name: passed into memory_region_init_io.
  99 */
 100void isa_register_portio_list(ISADevice *dev, uint16_t start,
 101                              const MemoryRegionPortio *portio,
 102                              void *opaque, const char *name);
 103
 104static inline ISABus *isa_bus_from_device(ISADevice *d)
 105{
 106    return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
 107}
 108
 109/* dma.c */
 110int DMA_get_channel_mode (int nchan);
 111int DMA_read_memory (int nchan, void *buf, int pos, int size);
 112int DMA_write_memory (int nchan, void *buf, int pos, int size);
 113void DMA_hold_DREQ (int nchan);
 114void DMA_release_DREQ (int nchan);
 115void DMA_schedule(void);
 116void DMA_init(int high_page_enable);
 117void DMA_register_channel (int nchan,
 118                           DMA_transfer_handler transfer_handler,
 119                           void *opaque);
 120#endif
 121