1 /******************************************************************************* 2 / 3 / File: ISA.h 4 / 5 / Description: Interface to ISA module 6 / 7 / Copyright 1998, Be Incorporated, All Rights Reserved. 8 / 9 *******************************************************************************/ 10 11 #ifndef _ISA_H 12 #define _ISA_H 13 14 //#include <SupportDefs.h> 15 #include <bus_manager.h> 16 17 #ifdef __cplusplus 18 extern "C" { 19 #endif 20 21 /* --- 22 ISA scatter/gather dma support. 23 --- */ 24 25 typedef struct { 26 ulong address; /* memory address (little endian!) 4 bytes */ 27 ushort transfer_count; /* # transfers minus one (little endian!) 2 bytes*/ 28 uchar reserved; /* filler, 1byte*/ 29 uchar flag; /* end of link flag, 1byte */ 30 } isa_dma_entry; 31 32 #define B_LAST_ISA_DMA_ENTRY 0x80 /* sets end of link flag in isa_dma_entry */ 33 34 enum { 35 B_8_BIT_TRANSFER, 36 B_16_BIT_TRANSFER 37 }; 38 39 #define B_MAX_ISA_DMA_COUNT 0x10000 40 41 typedef struct isa_module_info { 42 bus_manager_info binfo; 43 44 uint8 (*read_io_8) (int mapped_io_addr); 45 void (*write_io_8) (int mapped_io_addr, uint8 value); 46 uint16 (*read_io_16) (int mapped_io_addr); 47 void (*write_io_16) (int mapped_io_addr, uint16 value); 48 uint32 (*read_io_32) (int mapped_io_addr); 49 void (*write_io_32) (int mapped_io_addr, uint32 value); 50 51 phys_addr_t (*ram_address) (phys_addr_t physical_address_in_system_memory); 52 53 long (*make_isa_dma_table) ( 54 const void *buffer, /* buffer to make a table for */ 55 long buffer_size, /* buffer size */ 56 ulong num_bits, /* dma transfer size that will be used */ 57 isa_dma_entry *table, /* -> caller-supplied scatter/gather table */ 58 long num_entries /* max # entries in table */ 59 ); 60 status_t (*start_isa_dma) ( 61 long channel, /* dma channel to use */ 62 void *buf, /* buffer to transfer */ 63 long transfer_count, /* # transfers */ 64 uchar mode, /* mode flags */ 65 uchar e_mode /* extended mode flags */ 66 ); 67 long (*start_scattered_isa_dma) ( 68 long channel, /* channel # to use */ 69 const isa_dma_entry *table, /* physical address of scatter/gather table */ 70 uchar mode, /* mode flags */ 71 uchar emode /* extended mode flags */ 72 ); 73 status_t (*lock_isa_dma_channel) (long channel); 74 status_t (*unlock_isa_dma_channel) (long channel); 75 } isa_module_info; 76 77 #define B_ISA_MODULE_NAME "bus_managers/isa/v1" 78 79 #ifdef __cplusplus 80 } 81 #endif 82 83 #endif /* _ISA_H */ 84