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_init_ioport(ISADevice *dev, uint16_t ioport);
  32 void isa_init_ioport_range(ISADevice *dev, uint16_t start, uint16_t length);
  33 void isa_qdev_register(ISADeviceInfo *info);
  34 MemoryRegion *isa_address_space(ISADevice *dev);
  35 ISADevice *isa_create(const char *name);
  36 ISADevice *isa_try_create(const char *name);
  37 ISADevice *isa_create_simple(const char *name);
  38
  39 /**
  40  * isa_register_ioport: Install an I/O port region on the ISA bus.
  41  *
  42  * Register an I/O port region via memory_region_add_subregion
  43  * inside the ISA I/O address space.
  44  *
  45  * @dev: the ISADevice against which these are registered; may be NULL.
  46  * @io: the #MemoryRegion being registered.
  47  * @start: the base I/O port.
  48  */
  49 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
  50
  51 /**
  52  * isa_register_portio_list: Initialize a set of ISA io ports
  53  *
  54  * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
  55  * ports can be interleaved with I/O ports from other devices.  This
  56  * function makes it easy to create multiple MemoryRegions for a single
  57  * device and use the legacy portio routines.
  58  *
  59  * @dev: the ISADevice against which these are registered; may be NULL.
  60  * @start: the base I/O port against which the portio->offset is applied.
  61  * @portio: the ports, sorted by offset.
  62  * @opaque: passed into the old_portio callbacks.
  63  * @name: passed into memory_region_init_io.
  64  */
  65 void isa_register_portio_list(ISADevice *dev, uint16_t start,
  66                               const MemoryRegionPortio *portio,
  67                               void *opaque, const char *name);
  68
  69 extern target_phys_addr_t isa_mem_base;
  70
  71 void isa_mmio_setup(MemoryRegion *mr, target_phys_addr_t size);
  72 void isa_mmio_init(target_phys_addr_t base, target_phys_addr_t size);
  73
  74 /* dma.c */
  75 int DMA_get_channel_mode (int nchan);
  76 int DMA_read_memory (int nchan, void *buf, int pos, int size);
  77 int DMA_write_memory (int nchan, void *buf, int pos, int size);
  78 void DMA_hold_DREQ (int nchan);
  79 void DMA_release_DREQ (int nchan);
  80 void DMA_schedule(int nchan);
  81 void DMA_init(int high_page_enable, qemu_irq *cpu_request_exit);
  82 void DMA_register_channel (int nchan,
  83                            DMA_transfer_handler transfer_handler,
  84                            void *opaque);
  85 #endif