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