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-core.h"
   9#include "qom/object.h"
  10
  11#define ISA_NUM_IRQS 16
  12
  13#define TYPE_ISA_DEVICE "isa-device"
  14OBJECT_DECLARE_TYPE(ISADevice, ISADeviceClass, ISA_DEVICE)
  15
  16#define TYPE_ISA_BUS "ISA"
  17OBJECT_DECLARE_SIMPLE_TYPE(ISABus, ISA_BUS)
  18
  19#define TYPE_APPLE_SMC "isa-applesmc"
  20#define APPLESMC_MAX_DATA_LENGTH       32
  21#define APPLESMC_PROP_IO_BASE "iobase"
  22
  23static inline uint16_t applesmc_port(void)
  24{
  25    Object *obj = object_resolve_path_type("", TYPE_APPLE_SMC, NULL);
  26
  27    if (obj) {
  28        return object_property_get_uint(obj, APPLESMC_PROP_IO_BASE, NULL);
  29    }
  30    return 0;
  31}
  32
  33#define TYPE_ISADMA "isa-dma"
  34
  35typedef struct IsaDmaClass IsaDmaClass;
  36DECLARE_CLASS_CHECKERS(IsaDmaClass, ISADMA,
  37                       TYPE_ISADMA)
  38#define ISADMA(obj) \
  39    INTERFACE_CHECK(IsaDma, (obj), TYPE_ISADMA)
  40
  41typedef enum {
  42    ISADMA_TRANSFER_VERIFY,
  43    ISADMA_TRANSFER_READ,
  44    ISADMA_TRANSFER_WRITE,
  45    ISADMA_TRANSFER_ILLEGAL,
  46} IsaDmaTransferMode;
  47
  48typedef int (*IsaDmaTransferHandler)(void *opaque, int nchan, int pos,
  49                                     int size);
  50
  51struct IsaDmaClass {
  52    InterfaceClass parent;
  53
  54    bool (*has_autoinitialization)(IsaDma *obj, int nchan);
  55    int (*read_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  56    int (*write_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  57    void (*hold_DREQ)(IsaDma *obj, int nchan);
  58    void (*release_DREQ)(IsaDma *obj, int nchan);
  59    void (*schedule)(IsaDma *obj);
  60    void (*register_channel)(IsaDma *obj, int nchan,
  61                             IsaDmaTransferHandler transfer_handler,
  62                             void *opaque);
  63};
  64
  65struct ISADeviceClass {
  66    DeviceClass parent_class;
  67    void (*build_aml)(ISADevice *dev, Aml *scope);
  68};
  69
  70struct ISABus {
  71    /*< private >*/
  72    BusState parent_obj;
  73    /*< public >*/
  74
  75    MemoryRegion *address_space;
  76    MemoryRegion *address_space_io;
  77    qemu_irq *irqs;
  78    IsaDma *dma[2];
  79};
  80
  81struct ISADevice {
  82    /*< private >*/
  83    DeviceState parent_obj;
  84    /*< public >*/
  85
  86    int8_t isairq[2];      /* -1 = unassigned */
  87    int nirqs;
  88    int ioport_id;
  89};
  90
  91ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
  92                    MemoryRegion *address_space_io, Error **errp);
  93void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
  94qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq);
  95void isa_init_irq(ISADevice *dev, qemu_irq *p, unsigned isairq);
  96void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq);
  97void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16);
  98IsaDma *isa_get_dma(ISABus *bus, int nchan);
  99MemoryRegion *isa_address_space(ISADevice *dev);
 100MemoryRegion *isa_address_space_io(ISADevice *dev);
 101ISADevice *isa_new(const char *name);
 102ISADevice *isa_try_new(const char *name);
 103bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp);
 104ISADevice *isa_create_simple(ISABus *bus, const char *name);
 105
 106ISADevice *isa_vga_init(ISABus *bus);
 107void isa_build_aml(ISABus *bus, Aml *scope);
 108
 109/**
 110 * isa_register_ioport: Install an I/O port region on the ISA bus.
 111 *
 112 * Register an I/O port region via memory_region_add_subregion
 113 * inside the ISA I/O address space.
 114 *
 115 * @dev: the ISADevice against which these are registered; may be NULL.
 116 * @io: the #MemoryRegion being registered.
 117 * @start: the base I/O port.
 118 */
 119void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
 120
 121/**
 122 * isa_register_portio_list: Initialize a set of ISA io ports
 123 *
 124 * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
 125 * ports can be interleaved with I/O ports from other devices.  This
 126 * function makes it easy to create multiple MemoryRegions for a single
 127 * device and use the legacy portio routines.
 128 *
 129 * @dev: the ISADevice against which these are registered; may be NULL.
 130 * @piolist: the PortioList associated with the io ports
 131 * @start: the base I/O port against which the portio->offset is applied.
 132 * @portio: the ports, sorted by offset.
 133 * @opaque: passed into the portio callbacks.
 134 * @name: passed into memory_region_init_io.
 135 *
 136 * Returns: 0 on success, negative error code otherwise (e.g. if the
 137 *          ISA bus is not available)
 138 */
 139int 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#define TYPE_PIIX4_PCI_DEVICE "piix4-isa"
 151
 152#endif
 153