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
  23 typedef struct ISADeviceClass {
  24     DeviceClass parent_class;
  25     int (*init)(ISADevice *dev);
  26 } ISADeviceClass;
  27
  28 struct ISABus {
  29     BusState qbus;
  30     MemoryRegion *address_space_io;
  31     qemu_irq *irqs;
  32 };
  33
  34 struct ISADevice {
  35     DeviceState qdev;
  36     uint32_t isairq[2];
  37     int nirqs;
  38     int ioport_id;
  39 };
  40
  41 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io);
  42 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
  43 qemu_irq isa_get_irq(ISADevice *dev, int isairq);
  44 void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
  45 MemoryRegion *isa_address_space(ISADevice *dev);
  46 MemoryRegion *isa_address_space_io(ISADevice *dev);
  47 ISADevice *isa_create(ISABus *bus, const char *name);
  48 ISADevice *isa_try_create(ISABus *bus, const char *name);
  49 ISADevice *isa_create_simple(ISABus *bus, const char *name);
  50
  51 ISADevice *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  */
  63 void 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  */
  79 void isa_register_portio_list(ISADevice *dev, uint16_t start,
  80                               const MemoryRegionPortio *portio,
  81                               void *opaque, const char *name);
  82
  83 static inline ISABus *isa_bus_from_device(ISADevice *d)
  84 {
  85     return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
  86 }
  87
  88 extern hwaddr isa_mem_base;
  89
  90 void isa_mmio_setup(MemoryRegion *mr, hwaddr size);
  91 void isa_mmio_init(hwaddr base, hwaddr size);
  92
  93 /* dma.c */
  94 int DMA_get_channel_mode (int nchan);
  95 int DMA_read_memory (int nchan, void *buf, int pos, int size);
  96 int DMA_write_memory (int nchan, void *buf, int pos, int size);
  97 void DMA_hold_DREQ (int nchan);
  98 void DMA_release_DREQ (int nchan);
  99 void DMA_schedule(int nchan);
 100 void DMA_init(int high_page_enable, qemu_irq *cpu_request_exit);
 101 void DMA_register_channel (int nchan,
 102                            DMA_transfer_handler transfer_handler,
 103                            void *opaque);
 104 #endif