LXR qemu/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.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
  27static 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_uint(obj, APPLESMC_PROP_IO_BASE, NULL);
  33    }
  34    return 0;
  35}
  36
  37#define TYPE_ISADMA "isa-dma"
  38
  39#define ISADMA_CLASS(klass) \
  40    OBJECT_CLASS_CHECK(IsaDmaClass, (klass), TYPE_ISADMA)
  41#define ISADMA_GET_CLASS(obj) \
  42    OBJECT_GET_CLASS(IsaDmaClass, (obj), TYPE_ISADMA)
  43#define ISADMA(obj) \
  44    INTERFACE_CHECK(IsaDma, (obj), TYPE_ISADMA)
  45
  46typedef enum {
  47    ISADMA_TRANSFER_VERIFY,
  48    ISADMA_TRANSFER_READ,
  49    ISADMA_TRANSFER_WRITE,
  50    ISADMA_TRANSFER_ILLEGAL,
  51} IsaDmaTransferMode;
  52
  53typedef int (*IsaDmaTransferHandler)(void *opaque, int nchan, int pos,
  54                                     int size);
  55
  56typedef struct IsaDmaClass {
  57    InterfaceClass parent;
  58
  59    IsaDmaTransferMode (*get_transfer_mode)(IsaDma *obj, int nchan);
  60    bool (*has_autoinitialization)(IsaDma *obj, int nchan);
  61    int (*read_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  62    int (*write_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  63    void (*hold_DREQ)(IsaDma *obj, int nchan);
  64    void (*release_DREQ)(IsaDma *obj, int nchan);
  65    void (*schedule)(IsaDma *obj);
  66    void (*register_channel)(IsaDma *obj, int nchan,
  67                             IsaDmaTransferHandler transfer_handler,
  68                             void *opaque);
  69} IsaDmaClass;
  70
  71typedef struct ISADeviceClass {
  72    DeviceClass parent_class;
  73} ISADeviceClass;
  74
  75struct ISABus {
  76    /*< private >*/
  77    BusState parent_obj;
  78    /*< public >*/
  79
  80    MemoryRegion *address_space;
  81    MemoryRegion *address_space_io;
  82    qemu_irq *irqs;
  83    IsaDma *dma[2];
  84};
  85
  86struct ISADevice {
  87    /*< private >*/
  88    DeviceState parent_obj;
  89    /*< public >*/
  90
  91    uint32_t isairq[2];
  92    int nirqs;
  93    int ioport_id;
  94};
  95
  96ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
  97                    MemoryRegion *address_space_io, Error **errp);
  98void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
  99qemu_irq isa_get_irq(ISADevice *dev, int isairq);
 100void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
 101void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, int isairq);
 102void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16);
 103IsaDma *isa_get_dma(ISABus *bus, int nchan);
 104MemoryRegion *isa_address_space(ISADevice *dev);
 105MemoryRegion *isa_address_space_io(ISADevice *dev);
 106ISADevice *isa_create(ISABus *bus, const char *name);
 107ISADevice *isa_try_create(ISABus *bus, const char *name);
 108ISADevice *isa_create_simple(ISABus *bus, const char *name);
 109
 110ISADevice *isa_vga_init(ISABus *bus);
 111
 112/**
 113 * isa_register_ioport: Install an I/O port region on the ISA bus.
 114 *
 115 * Register an I/O port region via memory_region_add_subregion
 116 * inside the ISA I/O address space.
 117 *
 118 * @dev: the ISADevice against which these are registered; may be NULL.
 119 * @io: the #MemoryRegion being registered.
 120 * @start: the base I/O port.
 121 */
 122void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
 123
 124/**
 125 * isa_register_portio_list: Initialize a set of ISA io ports
 126 *
 127 * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
 128 * ports can be interleaved with I/O ports from other devices.  This
 129 * function makes it easy to create multiple MemoryRegions for a single
 130 * device and use the legacy portio routines.
 131 *
 132 * @dev: the ISADevice against which these are registered; may be NULL.
 133 * @piolist: the PortioList associated with the io ports
 134 * @start: the base I/O port against which the portio->offset is applied.
 135 * @portio: the ports, sorted by offset.
 136 * @opaque: passed into the portio callbacks.
 137 * @name: passed into memory_region_init_io.
 138 */
 139void isa_register_portio_list(ISADevice *dev,
 140                              PortioList *piolist,
 141                              uint16_t start,
 142                              const MemoryRegionPortio *portio,
 143                              void *opaque, const char *name);
 144
 145static inline ISABus *isa_bus_from_device(ISADevice *d)
 146{
 147    return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
 148}
 149
 150#endif
 151