1 #ifndef HW_ISA_H 2 #define HW_ISA_H 3 4 /* ISA bus */ 5 6 #include "exec/ioport.h" 7 #include "exec/memory.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 typedef struct ISADeviceClass { 24 DeviceClass parent_class; 25 int (*init)(ISADevice *dev); 26 } ISADeviceClass; 27 28 struct ISABus { 29 BusState qbus; 30 MemoryRegion *address_space_io; 31 qemu_irq *irqs; 32 }; 33 34 struct ISADevice { 35 DeviceState qdev; 36 uint32_t isairq[2]; 37 int nirqs; 38 int ioport_id; 39 }; 40 41 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io); 42 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs); 43 qemu_irq isa_get_irq(ISADevice *dev, int isairq); 44 void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq); 45 MemoryRegion *isa_address_space(ISADevice *dev); 46 MemoryRegion *isa_address_space_io(ISADevice *dev); 47 ISADevice *isa_create(ISABus *bus, const char *name); 48 ISADevice *isa_try_create(ISABus *bus, const char *name); 49 ISADevice *isa_create_simple(ISABus *bus, const char *name); 50 51 ISADevice *isa_vga_init(ISABus *bus); 52 53 /** 54 * isa_register_ioport: Install an I/O port region on the ISA bus. 55 * 56 * Register an I/O port region via memory_region_add_subregion 57 * inside the ISA I/O address space. 58 * 59 * @dev: the ISADevice against which these are registered; may be NULL. 60 * @io: the #MemoryRegion being registered. 61 * @start: the base I/O port. 62 */ 63 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start); 64 65 /** 66 * isa_register_portio_list: Initialize a set of ISA io ports 67 * 68 * Several ISA devices have many dis-joint I/O ports. Worse, these I/O 69 * ports can be interleaved with I/O ports from other devices. This 70 * function makes it easy to create multiple MemoryRegions for a single 71 * device and use the legacy portio routines. 72 * 73 * @dev: the ISADevice against which these are registered; may be NULL. 74 * @start: the base I/O port against which the portio->offset is applied. 75 * @portio: the ports, sorted by offset. 76 * @opaque: passed into the old_portio callbacks. 77 * @name: passed into memory_region_init_io. 78 */ 79 void isa_register_portio_list(ISADevice *dev, uint16_t start, 80 const MemoryRegionPortio *portio, 81 void *opaque, const char *name); 82 83 static inline ISABus *isa_bus_from_device(ISADevice *d) 84 { 85 return ISA_BUS(qdev_get_parent_bus(DEVICE(d))); 86 } 87 88 extern hwaddr isa_mem_base; 89 90 void isa_mmio_setup(MemoryRegion *mr, hwaddr size); 91 void isa_mmio_init(hwaddr base, hwaddr size); 92 93 /* dma.c */ 94 int DMA_get_channel_mode (int nchan); 95 int DMA_read_memory (int nchan, void *buf, int pos, int size); 96 int DMA_write_memory (int nchan, void *buf, int pos, int size); 97 void DMA_hold_DREQ (int nchan); 98 void DMA_release_DREQ (int nchan); 99 void DMA_schedule(int nchan); 100 void DMA_init(int high_page_enable, qemu_irq *cpu_request_exit); 101 void DMA_register_channel (int nchan, 102 DMA_transfer_handler transfer_handler, 103 void *opaque); 104 #endif 105