LXR qemu/hw/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 "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
  23typedef struct ISADeviceClass {
  24    DeviceClass parent_class;
  25    int (*init)(ISADevice *dev);
  26} ISADeviceClass;
  27
  28struct ISABus {
  29    BusState qbus;
  30    MemoryRegion *address_space_io;
  31    qemu_irq *irqs;
  32};
  33
  34struct ISADevice {
  35    DeviceState qdev;
  36    uint32_t isairq[2];
  37    int nirqs;
  38    int ioport_id;
  39};
  40
  41ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io);
  42void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
  43qemu_irq isa_get_irq(ISADevice *dev, int isairq);
  44void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
  45MemoryRegion *isa_address_space(ISADevice *dev);
  46MemoryRegion *isa_address_space_io(ISADevice *dev);
  47ISADevice *isa_create(ISABus *bus, const char *name);
  48ISADevice *isa_try_create(ISABus *bus, const char *name);
  49ISADevice *isa_create_simple(ISABus *bus, const char *name);
  50
  51ISADevice *isa_vga_init(ISABus *bus);
  52
  53/**
  54 * isa_register_ioport: Install an I/O port region on the ISA bus.
  55 *
  56 * Register an I/O port region via memory_region_add_subregion
  57 * inside the ISA I/O address space.
  58 *
  59 * @dev: the ISADevice against which these are registered; may be NULL.
  60 * @io: the #MemoryRegion being registered.
  61 * @start: the base I/O port.
  62 */
  63void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
  64
  65/**
  66 * isa_register_portio_list: Initialize a set of ISA io ports
  67 *
  68 * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
  69 * ports can be interleaved with I/O ports from other devices.  This
  70 * function makes it easy to create multiple MemoryRegions for a single
  71 * device and use the legacy portio routines.
  72 *
  73 * @dev: the ISADevice against which these are registered; may be NULL.
  74 * @start: the base I/O port against which the portio->offset is applied.
  75 * @portio: the ports, sorted by offset.
  76 * @opaque: passed into the old_portio callbacks.
  77 * @name: passed into memory_region_init_io.
  78 */
  79void isa_register_portio_list(ISADevice *dev, uint16_t start,
  80                              const MemoryRegionPortio *portio,
  81                              void *opaque, const char *name);
  82
  83static inline ISABus *isa_bus_from_device(ISADevice *d)
  84{
  85    return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
  86}
  87
  88extern hwaddr isa_mem_base;
  89
  90void isa_mmio_setup(MemoryRegion *mr, hwaddr size);
  91void isa_mmio_init(hwaddr base, hwaddr size);
  92
  93/* dma.c */
  94int DMA_get_channel_mode (int nchan);
  95int DMA_read_memory (int nchan, void *buf, int pos, int size);
  96int DMA_write_memory (int nchan, void *buf, int pos, int size);
  97void DMA_hold_DREQ (int nchan);
  98void DMA_release_DREQ (int nchan);
  99void DMA_schedule(int nchan);
 100void DMA_init(int high_page_enable, qemu_irq *cpu_request_exit);
 101void DMA_register_channel (int nchan,
 102                           DMA_transfer_handler transfer_handler,
 103                           void *opaque);
 104#endif
 105