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 90 /** 91 * isa_register_ioport: Install an I/O port region on the ISA bus. 92 * 93 * Register an I/O port region via memory_region_add_subregion 94 * inside the ISA I/O address space. 95 * 96 * @dev: the ISADevice against which these are registered; may be NULL. 97 * @io: the #MemoryRegion being registered. 98 * @start: the base I/O port. 99 */ 100 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start); 101 102 /** 103 * isa_register_portio_list: Initialize a set of ISA io ports 104 * 105 * Several ISA devices have many dis-joint I/O ports. Worse, these I/O 106 * ports can be interleaved with I/O ports from other devices. This 107 * function makes it easy to create multiple MemoryRegions for a single 108 * device and use the legacy portio routines. 109 * 110 * @dev: the ISADevice against which these are registered; may be NULL. 111 * @piolist: the PortioList associated with the io ports 112 * @start: the base I/O port against which the portio->offset is applied. 113 * @portio: the ports, sorted by offset. 114 * @opaque: passed into the portio callbacks. 115 * @name: passed into memory_region_init_io. 116 * 117 * Returns: 0 on success, negative error code otherwise (e.g. if the 118 * ISA bus is not available) 119 */ 120 int isa_register_portio_list(ISADevice *dev, 121 PortioList *piolist, 122 uint16_t start, 123 const MemoryRegionPortio *portio, 124 void *opaque, const char *name); 125 126 static inline ISABus *isa_bus_from_device(ISADevice *d) 127 { 128 return ISA_BUS(qdev_get_parent_bus(DEVICE(d))); 129 } 130 131 #endif 132