qemu

FORK: QEMU emulator
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isa.h (4149B)

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