59 lines
2.0 KiB
C
Executable File
59 lines
2.0 KiB
C
Executable File
/*
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** Copyright 2002, Thomas Kurschel. All rights reserved.
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** Distributed under the terms of the NewOS License.
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*/
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// this is not to be taken seriously - it's just a simple module
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#ifndef __ISA_H__
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#define __ISA_H__
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#include <module.h>
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#include <bus.h>
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#define ISA_MODULE_NAME "bus_managers/isa/v1"
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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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typedef struct {
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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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} isa_bus_manager;
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#endif
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