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