include/hw/isa/isa.h

   1 #ifndef HW_ISA_H
   2 #define HW_ISA_H
   3
   4 /* ISA bus */
   5
   6 #include "exec/memory.h"
   7 #include "exec/ioport.h"
   8 #include "hw/qdev-core.h"
   9 #include "qom/object.h"
  10
  11 #define ISA_NUM_IRQS 16
  12
  13 #define TYPE_ISA_DEVICE "isa-device"
  14 OBJECT_DECLARE_TYPE(ISADevice, ISADeviceClass, ISA_DEVICE)
  15
  16 #define TYPE_ISA_BUS "ISA"
  17 OBJECT_DECLARE_SIMPLE_TYPE(ISABus, ISA_BUS)
  18
  19 #define TYPE_ISADMA "isa-dma"
  20
  21 typedef struct IsaDmaClass IsaDmaClass;
  22 DECLARE_CLASS_CHECKERS(IsaDmaClass, ISADMA,
  23                        TYPE_ISADMA)
  24 #define ISADMA(obj) \
  25     INTERFACE_CHECK(IsaDma, (obj), TYPE_ISADMA)
  26
  27 typedef enum {
  28     ISADMA_TRANSFER_VERIFY,
  29     ISADMA_TRANSFER_READ,
  30     ISADMA_TRANSFER_WRITE,
  31     ISADMA_TRANSFER_ILLEGAL,
  32 } IsaDmaTransferMode;
  33
  34 typedef int (*IsaDmaTransferHandler)(void *opaque, int nchan, int pos,
  35                                      int size);
  36
  37 struct IsaDmaClass {
  38     InterfaceClass parent;
  39
  40     bool (*has_autoinitialization)(IsaDma *obj, int nchan);
  41     int (*read_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  42     int (*write_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  43     void (*hold_DREQ)(IsaDma *obj, int nchan);
  44     void (*release_DREQ)(IsaDma *obj, int nchan);
  45     void (*schedule)(IsaDma *obj);
  46     void (*register_channel)(IsaDma *obj, int nchan,
  47                              IsaDmaTransferHandler transfer_handler,
  48                              void *opaque);
  49 };
  50
  51 struct ISADeviceClass {
  52     DeviceClass parent_class;
  53 };
  54
  55 struct ISABus {
  56     /*< private >*/
  57     BusState parent_obj;
  58     /*< public >*/
  59
  60     MemoryRegion *address_space;
  61     MemoryRegion *address_space_io;
  62     qemu_irq *irqs;
  63     IsaDma *dma[2];
  64 };
  65
  66 struct ISADevice {
  67     /*< private >*/
  68     DeviceState parent_obj;
  69     /*< public >*/
  70
  71     int ioport_id;
  72 };
  73
  74 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
  75                     MemoryRegion *address_space_io, Error **errp);
  76 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
  77 qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq);
  78 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq);
  79 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16);
  80 IsaDma *isa_get_dma(ISABus *bus, int nchan);
  81 MemoryRegion *isa_address_space(ISADevice *dev);
  82 MemoryRegion *isa_address_space_io(ISADevice *dev);
  83 ISADevice *isa_new(const char *name);
  84 ISADevice *isa_try_new(const char *name);
  85 bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp);
  86 ISADevice *isa_create_simple(ISABus *bus, const char *name);
  87
  88 ISADevice *isa_vga_init(ISABus *bus);
  89 void isa_build_aml(ISABus *bus, Aml *scope);
  90
  91 /**
  92  * isa_register_ioport: Install an I/O port region on the ISA bus.
  93  *
  94  * Register an I/O port region via memory_region_add_subregion
  95  * inside the ISA I/O address space.
  96  *
  97  * @dev: the ISADevice against which these are registered; may be NULL.
  98  * @io: the #MemoryRegion being registered.
  99  * @start: the base I/O port.
 100  */
 101 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
 102
 103 /**
 104  * isa_register_portio_list: Initialize a set of ISA io ports
 105  *
 106  * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
 107  * ports can be interleaved with I/O ports from other devices.  This
 108  * function makes it easy to create multiple MemoryRegions for a single
 109  * device and use the legacy portio routines.
 110  *
 111  * @dev: the ISADevice against which these are registered; may be NULL.
 112  * @piolist: the PortioList associated with the io ports
 113  * @start: the base I/O port against which the portio->offset is applied.
 114  * @portio: the ports, sorted by offset.
 115  * @opaque: passed into the portio callbacks.
 116  * @name: passed into memory_region_init_io.
 117  *
 118  * Returns: 0 on success, negative error code otherwise (e.g. if the
 119  *          ISA bus is not available)
 120  */
 121 int isa_register_portio_list(ISADevice *dev,
 122                              PortioList *piolist,
 123                              uint16_t start,
 124                              const MemoryRegionPortio *portio,
 125                              void *opaque, const char *name);
 126
 127 static inline ISABus *isa_bus_from_device(ISADevice *d)
 128 {
 129     return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
 130 }
 131
 132 #endif