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