85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
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/*******************************************************************************
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/
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/ File: ISA.h
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/
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/ Description: Interface to ISA module
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/
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/ Copyright 1998, Be Incorporated, All Rights Reserved.
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/
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*******************************************************************************/
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#ifndef _ISA_H
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#define _ISA_H
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//#include <SupportDefs.h>
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#include <bus_manager.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* ---
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ISA scatter/gather dma support.
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--- */
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typedef struct {
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ulong address; /* memory address (little endian!) 4 bytes */
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ushort transfer_count; /* # transfers minus one (little endian!) 2 bytes*/
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uchar reserved; /* filler, 1byte*/
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uchar flag; /* end of link flag, 1byte */
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} isa_dma_entry;
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#define B_LAST_ISA_DMA_ENTRY 0x80 /* sets end of link flag in isa_dma_entry */
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enum {
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B_8_BIT_TRANSFER,
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B_16_BIT_TRANSFER
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};
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#define B_MAX_ISA_DMA_COUNT 0x10000
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typedef struct isa_module_info isa_module_info;
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struct isa_module_info {
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bus_manager_info binfo;
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uint8 (*read_io_8) (int mapped_io_addr);
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void (*write_io_8) (int mapped_io_addr, uint8 value);
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uint16 (*read_io_16) (int mapped_io_addr);
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void (*write_io_16) (int mapped_io_addr, uint16 value);
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uint32 (*read_io_32) (int mapped_io_addr);
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void (*write_io_32) (int mapped_io_addr, uint32 value);
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void * (*ram_address) (const void *physical_address_in_system_memory);
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long (*make_isa_dma_table) (
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const void *buffer, /* buffer to make a table for */
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long buffer_size, /* buffer size */
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ulong num_bits, /* dma transfer size that will be used */
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isa_dma_entry *table, /* -> caller-supplied scatter/gather table */
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long num_entries /* max # entries in table */
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);
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long (*start_isa_dma) (
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long channel, /* dma channel to use */
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void *buf, /* buffer to transfer */
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long transfer_count, /* # transfers */
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uchar mode, /* mode flags */
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uchar e_mode /* extended mode flags */
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);
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long (*start_scattered_isa_dma) (
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long channel, /* channel # to use */
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const isa_dma_entry *table, /* physical address of scatter/gather table */
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uchar mode, /* mode flags */
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uchar emode /* extended mode flags */
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);
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long (*lock_isa_dma_channel) (long channel);
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long (*unlock_isa_dma_channel) (long channel);
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};
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#define B_ISA_MODULE_NAME "bus_managers/isa/v1"
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ISA_H */
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