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
  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_int(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 struct IsaDma {
  47     Object parent;
  48 };
  49
  50 typedef enum {
  51     ISADMA_TRANSFER_VERIFY,
  52     ISADMA_TRANSFER_READ,
  53     ISADMA_TRANSFER_WRITE,
  54     ISADMA_TRANSFER_ILLEGAL,
  55 } IsaDmaTransferMode;
  56
  57 typedef int (*IsaDmaTransferHandler)(void *opaque, int nchan, int pos,
  58                                      int size);
  59
  60 typedef struct IsaDmaClass {
  61     InterfaceClass parent;
  62
  63     IsaDmaTransferMode (*get_transfer_mode)(IsaDma *obj, int nchan);
  64     bool (*has_autoinitialization)(IsaDma *obj, int nchan);
  65     int (*read_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  66     int (*write_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
  67     void (*hold_DREQ)(IsaDma *obj, int nchan);
  68     void (*release_DREQ)(IsaDma *obj, int nchan);
  69     void (*schedule)(IsaDma *obj);
  70     void (*register_channel)(IsaDma *obj, int nchan,
  71                              IsaDmaTransferHandler transfer_handler,
  72                              void *opaque);
  73 } IsaDmaClass;
  74
  75 typedef struct ISADeviceClass {
  76     DeviceClass parent_class;
  77 } ISADeviceClass;
  78
  79 struct ISABus {
  80     /*< private >*/
  81     BusState parent_obj;
  82     /*< public >*/
  83
  84     MemoryRegion *address_space;
  85     MemoryRegion *address_space_io;
  86     qemu_irq *irqs;
  87     IsaDma *dma[2];
  88 };
  89
  90 struct ISADevice {
  91     /*< private >*/
  92     DeviceState parent_obj;
  93     /*< public >*/
  94
  95     uint32_t isairq[2];
  96     int nirqs;
  97     int ioport_id;
  98 };
  99
 100 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space,
 101                     MemoryRegion *address_space_io, Error **errp);
 102 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
 103 qemu_irq isa_get_irq(ISADevice *dev, int isairq);
 104 void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
 105 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, int isairq);
 106 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16);
 107 IsaDma *isa_get_dma(ISABus *bus, int nchan);
 108 MemoryRegion *isa_address_space(ISADevice *dev);
 109 MemoryRegion *isa_address_space_io(ISADevice *dev);
 110 ISADevice *isa_create(ISABus *bus, const char *name);
 111 ISADevice *isa_try_create(ISABus *bus, const char *name);
 112 ISADevice *isa_create_simple(ISABus *bus, const char *name);
 113
 114 ISADevice *isa_vga_init(ISABus *bus);
 115
 116 /**
 117  * isa_register_ioport: Install an I/O port region on the ISA bus.
 118  *
 119  * Register an I/O port region via memory_region_add_subregion
 120  * inside the ISA I/O address space.
 121  *
 122  * @dev: the ISADevice against which these are registered; may be NULL.
 123  * @io: the #MemoryRegion being registered.
 124  * @start: the base I/O port.
 125  */
 126 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start);
 127
 128 /**
 129  * isa_register_portio_list: Initialize a set of ISA io ports
 130  *
 131  * Several ISA devices have many dis-joint I/O ports.  Worse, these I/O
 132  * ports can be interleaved with I/O ports from other devices.  This
 133  * function makes it easy to create multiple MemoryRegions for a single
 134  * device and use the legacy portio routines.
 135  *
 136  * @dev: the ISADevice against which these are registered; may be NULL.
 137  * @piolist: the PortioList associated with the io ports
 138  * @start: the base I/O port against which the portio->offset is applied.
 139  * @portio: the ports, sorted by offset.
 140  * @opaque: passed into the portio callbacks.
 141  * @name: passed into memory_region_init_io.
 142  */
 143 void isa_register_portio_list(ISADevice *dev,
 144                               PortioList *piolist,
 145                               uint16_t start,
 146                               const MemoryRegionPortio *portio,
 147                               void *opaque, const char *name);
 148
 149 static inline ISABus *isa_bus_from_device(ISADevice *d)
 150 {
 151     return ISA_BUS(qdev_get_parent_bus(DEVICE(d)));
 152 }
 153
 154 /* i8257.c */
 155 void DMA_init(ISABus *bus, int high_page_enable);
 156 #endif