LXR qemu/hw/isa.h

   1#ifndef HW_ISA_H
   2#define HW_ISA_H
   3
   4/* ISA bus */
   5
   6#include "ioport.h"
   7#include "memory.h"
   8#include "qdev.h"
   9
  10#define ISA_NUM_IRQS 16
  11
  12typedef struct ISADevice ISADevice;
  13
  14#define TYPE_ISA_DEVICE "isa-device"
  15#define ISA_DEVICE(obj) \
  16     OBJECT_CHECK(ISADevice, (obj), TYPE_ISA_DEVICE)
  17#define ISA_DEVICE_CLASS(klass) \
  18     OBJECT_CLASS_CHECK(ISADeviceClass, (klass), TYPE_ISA_DEVICE)
  19#define ISA_DEVICE_GET_CLASS(obj) \
  20     OBJECT_GET_CLASS(ISADeviceClass, (obj), TYPE_ISA_DEVICE)
  21
  22typedef struct ISADeviceClass {
  23    DeviceClass parent_class;
  24    int (*init)(ISADevice *dev);
  25} ISADeviceClass;
  26
  27struct ISABus {
  28    BusState qbus;
  29    MemoryRegion *address_space_io;
  30    qemu_irq *irqs;
  31};
  32
  33struct ISADevice {
  34    DeviceState qdev;
  35    uint32_t isairq[2];
  36    int nirqs;
  37    int ioport_id;
  38};
  39
  40ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io);
  41void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
  42qemu_irq isa_get_irq(ISADevice *dev, int isairq);
  43void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
  44MemoryRegion *isa_address_space(ISADevice *dev);
  45ISADevice *isa_create(ISABus *bus, const char *name);
  46ISADevice *isa_try_create(ISABus *bus, const char *name);
  47ISADevice *isa_create_simple(ISABus *bus, const char *name);
  48
  49/**
  50 * isa_register_ioport: Install an I/O port region on the ISA bus.
  51 *
  52 * Register an I/O port region via memory_region_add_subregion
  53 * inside the ISA I/O address space.
  54 *
  55 * @dev: the ISADevice against which these are registered; may be NULL.
  56 * @io: the #MemoryRegion being registered.
  57 * @start: the base I/O port.
  58 */
  59void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
  60
  61/**
  62 * isa_register_portio_list: Initialize a set of ISA io ports
  63 *
  64 * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
  65 * ports can be interleaved with I/O ports from other devices.  This
  66 * function makes it easy to create multiple MemoryRegions for a single
  67 * device and use the legacy portio routines.
  68 *
  69 * @dev: the ISADevice against which these are registered; may be NULL.
  70 * @start: the base I/O port against which the portio->offset is applied.
  71 * @portio: the ports, sorted by offset.
  72 * @opaque: passed into the old_portio callbacks.
  73 * @name: passed into memory_region_init_io.
  74 */
  75void isa_register_portio_list(ISADevice *dev, uint16_t start,
  76                              const MemoryRegionPortio *portio,
  77                              void *opaque, const char *name);
  78
  79static inline ISABus *isa_bus_from_device(ISADevice *d)
  80{
  81    return DO_UPCAST(ISABus, qbus, d->qdev.parent_bus);
  82}
  83
  84extern target_phys_addr_t isa_mem_base;
  85
  86void isa_mmio_setup(MemoryRegion *mr, target_phys_addr_t size);
  87void isa_mmio_init(target_phys_addr_t base, target_phys_addr_t size);
  88
  89/* dma.c */
  90int DMA_get_channel_mode (int nchan);
  91int DMA_read_memory (int nchan, void *buf, int pos, int size);
  92int DMA_write_memory (int nchan, void *buf, int pos, int size);
  93void DMA_hold_DREQ (int nchan);
  94void DMA_release_DREQ (int nchan);
  95void DMA_schedule(int nchan);
  96void DMA_init(int high_page_enable, qemu_irq *cpu_request_exit);
  97void DMA_register_channel (int nchan,
  98                           DMA_transfer_handler transfer_handler,
  99                           void *opaque);
 100#endif
 101