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