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 #define TYPE_APPLE_SMC "isa-applesmc"
  24 #define APPLESMC_MAX_DATA_LENGTH       32
  25 #define APPLESMC_PROP_IO_BASE "iobase"
  26
  27 static inline uint16_t applesmc_port(void)
  28 {
  29     Object *obj = object_resolve_path_type("", TYPE_APPLE_SMC, NULL);
  30
  31     if (obj) {
  32         return object_property_get_int(obj, APPLESMC_PROP_IO_BASE, NULL);
  33     }
  34     return 0;
  35 }
  36
  37 typedef struct ISADeviceClass {
  38     DeviceClass parent_class;
  39 } ISADeviceClass;
  40
  41 struct ISABus {
  42     /*< private >*/
  43     BusState parent_obj;
  44     /*< public >*/
  45
  46     MemoryRegion *address_space;
  47     MemoryRegion *address_space_io;
  48     qemu_irq *irqs;
  49 };
  50
  51 struct ISADevice {
  52     /*< private >*/
  53     DeviceState parent_obj;
  54     /*< public >*/
  55
  56     uint32_t isairq[2];
  57     int nirqs;
  58     int ioport_id;
  59 };
  60
  61 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
  62                     MemoryRegion *address_space_io);
  63 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
  64 qemu_irq isa_get_irq(ISADevice *dev, int isairq);
  65 void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
  66 MemoryRegion *isa_address_space(ISADevice *dev);
  67 MemoryRegion *isa_address_space_io(ISADevice *dev);
  68 ISADevice *isa_create(ISABus *bus, const char *name);
  69 ISADevice *isa_try_create(ISABus *bus, const char *name);
  70 ISADevice *isa_create_simple(ISABus *bus, const char *name);
  71
  72 ISADevice *isa_vga_init(ISABus *bus);
  73
  74 /**
  75  * isa_register_ioport: Install an I/O port region on the ISA bus.
  76  *
  77  * Register an I/O port region via memory_region_add_subregion
  78  * inside the ISA I/O address space.
  79  *
  80  * @dev: the ISADevice against which these are registered; may be NULL.
  81  * @io: the #MemoryRegion being registered.
  82  * @start: the base I/O port.
  83  */
  84 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
  85
  86 /**
  87  * isa_register_portio_list: Initialize a set of ISA io ports
  88  *
  89  * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
  90  * ports can be interleaved with I/O ports from other devices.  This
  91  * function makes it easy to create multiple MemoryRegions for a single
  92  * device and use the legacy portio routines.
  93  *
  94  * @dev: the ISADevice against which these are registered; may be NULL.
  95  * @start: the base I/O port against which the portio->offset is applied.
  96  * @portio: the ports, sorted by offset.
  97  * @opaque: passed into the portio callbacks.
  98  * @name: passed into memory_region_init_io.
  99  */
 100 void isa_register_portio_list(ISADevice *dev, uint16_t start,
 101                               const MemoryRegionPortio *portio,
 102                               void *opaque, const char *name);
 103
 104 static inline ISABus *isa_bus_from_device(ISADevice *d)
 105 {
 106     return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
 107 }
 108
 109 /* dma.c */
 110 int DMA_get_channel_mode (int nchan);
 111 int DMA_read_memory (int nchan, void *buf, int pos, int size);
 112 int DMA_write_memory (int nchan, void *buf, int pos, int size);
 113 void DMA_hold_DREQ (int nchan);
 114 void DMA_release_DREQ (int nchan);
 115 void DMA_schedule(int nchan);
 116 void DMA_init(int high_page_enable, qemu_irq *cpu_request_exit);
 117 void DMA_register_channel (int nchan,
 118                            DMA_transfer_handler transfer_handler,
 119                            void *opaque);
 120 #endif