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_uint(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 157