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
  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_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
  46 typedef enum {
  47     ISADMA_TRANSFER_VERIFY,
  48     ISADMA_TRANSFER_READ,
  49     ISADMA_TRANSFER_WRITE,
  50     ISADMA_TRANSFER_ILLEGAL,
  51 } IsaDmaTransferMode;
  52
  53 typedef int (*IsaDmaTransferHandler)(void *opaque, int nchan, int pos,
  54                                      int size);
  55
  56 typedef struct IsaDmaClass {
  57     InterfaceClass parent;
  58
  59     bool (*has_autoinitialization)(IsaDma *obj, int nchan);
  60     int (*read_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  61     int (*write_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  62     void (*hold_DREQ)(IsaDma *obj, int nchan);
  63     void (*release_DREQ)(IsaDma *obj, int nchan);
  64     void (*schedule)(IsaDma *obj);
  65     void (*register_channel)(IsaDma *obj, int nchan,
  66                              IsaDmaTransferHandler transfer_handler,
  67                              void *opaque);
  68 } IsaDmaClass;
  69
  70 typedef struct ISADeviceClass {
  71     DeviceClass parent_class;
  72     void (*build_aml)(ISADevice *dev, Aml *scope);
  73 } ISADeviceClass;
  74
  75 struct 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
  86 struct ISADevice {
  87     /*< private >*/
  88     DeviceState parent_obj;
  89     /*< public >*/
  90
  91     int8_t isairq[2];      /* -1 = unassigned */
  92     int nirqs;
  93     int ioport_id;
  94 };
  95
  96 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
  97                     MemoryRegion *address_space_io, Error **errp);
  98 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
  99 qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq);
 100 void isa_init_irq(ISADevice *dev, qemu_irq *p, unsigned isairq);
 101 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq);
 102 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16);
 103 IsaDma *isa_get_dma(ISABus *bus, int nchan);
 104 MemoryRegion *isa_address_space(ISADevice *dev);
 105 MemoryRegion *isa_address_space_io(ISADevice *dev);
 106 ISADevice *isa_create(ISABus *bus, const char *name);
 107 ISADevice *isa_try_create(ISABus *bus, const char *name);
 108 ISADevice *isa_create_simple(ISABus *bus, const char *name);
 109
 110 ISADevice *isa_vga_init(ISABus *bus);
 111 void isa_build_aml(ISABus *bus, Aml *scope);
 112
 113 /**
 114  * isa_register_ioport: Install an I/O port region on the ISA bus.
 115  *
 116  * Register an I/O port region via memory_region_add_subregion
 117  * inside the ISA I/O address space.
 118  *
 119  * @dev: the ISADevice against which these are registered; may be NULL.
 120  * @io: the #MemoryRegion being registered.
 121  * @start: the base I/O port.
 122  */
 123 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
 124
 125 /**
 126  * isa_register_portio_list: Initialize a set of ISA io ports
 127  *
 128  * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
 129  * ports can be interleaved with I/O ports from other devices.  This
 130  * function makes it easy to create multiple MemoryRegions for a single
 131  * device and use the legacy portio routines.
 132  *
 133  * @dev: the ISADevice against which these are registered; may be NULL.
 134  * @piolist: the PortioList associated with the io ports
 135  * @start: the base I/O port against which the portio->offset is applied.
 136  * @portio: the ports, sorted by offset.
 137  * @opaque: passed into the portio callbacks.
 138  * @name: passed into memory_region_init_io.
 139  */
 140 void isa_register_portio_list(ISADevice *dev,
 141                               PortioList *piolist,
 142                               uint16_t start,
 143                               const MemoryRegionPortio *portio,
 144                               void *opaque, const char *name);
 145
 146 static inline ISABus *isa_bus_from_device(ISADevice *d)
 147 {
 148     return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
 149 }
 150
 151 #define TYPE_PIIX4_PCI_DEVICE "piix4-isa"
 152
 153 #endif