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_APPLE_SMC "isa-applesmc"
  20 #define APPLESMC_MAX_DATA_LENGTH       32
  21 #define APPLESMC_PROP_IO_BASE "iobase"
  22
  23 static 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
  35 typedef struct IsaDmaClass IsaDmaClass;
  36 DECLARE_CLASS_CHECKERS(IsaDmaClass, ISADMA,
  37                        TYPE_ISADMA)
  38 #define ISADMA(obj) \
  39     INTERFACE_CHECK(IsaDma, (obj), TYPE_ISADMA)
  40
  41 typedef enum {
  42     ISADMA_TRANSFER_VERIFY,
  43     ISADMA_TRANSFER_READ,
  44     ISADMA_TRANSFER_WRITE,
  45     ISADMA_TRANSFER_ILLEGAL,
  46 } IsaDmaTransferMode;
  47
  48 typedef int (*IsaDmaTransferHandler)(void *opaque, int nchan, int pos,
  49                                      int size);
  50
  51 struct 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
  65 struct ISADeviceClass {
  66     DeviceClass parent_class;
  67     void (*build_aml)(ISADevice *dev, Aml *scope);
  68 };
  69
  70 struct 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
  81 struct ISADevice {
  82     /*< private >*/
  83     DeviceState parent_obj;
  84     /*< public >*/
  85
  86     int ioport_id;
  87 };
  88
  89 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
  90                     MemoryRegion *address_space_io, Error **errp);
  91 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
  92 qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq);
  93 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq);
  94 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16);
  95 IsaDma *isa_get_dma(ISABus *bus, int nchan);
  96 MemoryRegion *isa_address_space(ISADevice *dev);
  97 MemoryRegion *isa_address_space_io(ISADevice *dev);
  98 ISADevice *isa_new(const char *name);
  99 ISADevice *isa_try_new(const char *name);
 100 bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp);
 101 ISADevice *isa_create_simple(ISABus *bus, const char *name);
 102
 103 ISADevice *isa_vga_init(ISABus *bus);
 104 void isa_build_aml(ISABus *bus, Aml *scope);
 105
 106 /**
 107  * isa_register_ioport: Install an I/O port region on the ISA bus.
 108  *
 109  * Register an I/O port region via memory_region_add_subregion
 110  * inside the ISA I/O address space.
 111  *
 112  * @dev: the ISADevice against which these are registered; may be NULL.
 113  * @io: the #MemoryRegion being registered.
 114  * @start: the base I/O port.
 115  */
 116 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
 117
 118 /**
 119  * isa_register_portio_list: Initialize a set of ISA io ports
 120  *
 121  * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
 122  * ports can be interleaved with I/O ports from other devices.  This
 123  * function makes it easy to create multiple MemoryRegions for a single
 124  * device and use the legacy portio routines.
 125  *
 126  * @dev: the ISADevice against which these are registered; may be NULL.
 127  * @piolist: the PortioList associated with the io ports
 128  * @start: the base I/O port against which the portio->offset is applied.
 129  * @portio: the ports, sorted by offset.
 130  * @opaque: passed into the portio callbacks.
 131  * @name: passed into memory_region_init_io.
 132  *
 133  * Returns: 0 on success, negative error code otherwise (e.g. if the
 134  *          ISA bus is not available)
 135  */
 136 int isa_register_portio_list(ISADevice *dev,
 137                              PortioList *piolist,
 138                              uint16_t start,
 139                              const MemoryRegionPortio *portio,
 140                              void *opaque, const char *name);
 141
 142 static inline ISABus *isa_bus_from_device(ISADevice *d)
 143 {
 144     return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
 145 }
 146
 147 #define TYPE_PIIX4_PCI_DEVICE "piix4-isa"
 148
 149 #endif