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 typedef struct ISABus ISABus;
  11 typedef struct ISADevice ISADevice;
  12 typedef struct ISADeviceInfo ISADeviceInfo;
  13
  14 struct ISADevice {
  15     DeviceState qdev;
  16     uint32_t isairq[2];
  17     int nirqs;
  18     int ioport_id;
  19 };
  20
  21 typedef int (*isa_qdev_initfn)(ISADevice *dev);
  22 struct ISADeviceInfo {
  23     DeviceInfo qdev;
  24     isa_qdev_initfn init;
  25 };
  26
  27 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io);
  28 void isa_bus_irqs(qemu_irq *irqs);
  29 qemu_irq isa_get_irq(int isairq);
  30 void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
  31 void isa_qdev_register(ISADeviceInfo *info);
  32 MemoryRegion *isa_address_space(ISADevice *dev);
  33 ISADevice *isa_create(const char *name);
  34 ISADevice *isa_try_create(const char *name);
  35 ISADevice *isa_create_simple(const char *name);
  36
  37 /**
  38  * isa_register_ioport: Install an I/O port region on the ISA bus.
  39  *
  40  * Register an I/O port region via memory_region_add_subregion
  41  * inside the ISA I/O address space.
  42  *
  43  * @dev: the ISADevice against which these are registered; may be NULL.
  44  * @io: the #MemoryRegion being registered.
  45  * @start: the base I/O port.
  46  */
  47 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
  48
  49 /**
  50  * isa_register_portio_list: Initialize a set of ISA io ports
  51  *
  52  * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
  53  * ports can be interleaved with I/O ports from other devices.  This
  54  * function makes it easy to create multiple MemoryRegions for a single
  55  * device and use the legacy portio routines.
  56  *
  57  * @dev: the ISADevice against which these are registered; may be NULL.
  58  * @start: the base I/O port against which the portio->offset is applied.
  59  * @portio: the ports, sorted by offset.
  60  * @opaque: passed into the old_portio callbacks.
  61  * @name: passed into memory_region_init_io.
  62  */
  63 void isa_register_portio_list(ISADevice *dev, uint16_t start,
  64                               const MemoryRegionPortio *portio,
  65                               void *opaque, const char *name);
  66
  67 extern target_phys_addr_t isa_mem_base;
  68
  69 void isa_mmio_setup(MemoryRegion *mr, target_phys_addr_t size);
  70 void isa_mmio_init(target_phys_addr_t base, target_phys_addr_t size);
  71
  72 /* dma.c */
  73 int DMA_get_channel_mode (int nchan);
  74 int DMA_read_memory (int nchan, void *buf, int pos, int size);
  75 int DMA_write_memory (int nchan, void *buf, int pos, int size);
  76 void DMA_hold_DREQ (int nchan);
  77 void DMA_release_DREQ (int nchan);
  78 void DMA_schedule(int nchan);
  79 void DMA_init(int high_page_enable, qemu_irq *cpu_request_exit);
  80 void DMA_register_channel (int nchan,
  81                            DMA_transfer_handler transfer_handler,
  82                            void *opaque);
  83 #endif