haiku/headers/private/kernel/isa.h

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/*
** Copyright 2002, Thomas Kurschel. All rights reserved.
** Distributed under the terms of the NewOS License.
*/
// this is not to be taken seriously - it's just a simple module
#ifndef __ISA_H__
#define __ISA_H__
#include <module.h>
#include <bus.h>
#define ISA_MODULE_NAME "bus_managers/isa/v1"
typedef struct {
ulong address; /* memory address (little endian!) 4 bytes */
ushort transfer_count; /* # transfers minus one (little endian!) 2 bytes*/
uchar reserved; /* filler, 1byte*/
uchar flag; /* end of link flag, 1byte */
} isa_dma_entry;
typedef struct {
bus_manager_info binfo;
uint8 (*read_io_8) (int mapped_io_addr);
void (*write_io_8) (int mapped_io_addr, uint8 value);
uint16 (*read_io_16) (int mapped_io_addr);
void (*write_io_16) (int mapped_io_addr, uint16 value);
uint32 (*read_io_32) (int mapped_io_addr);
void (*write_io_32) (int mapped_io_addr, uint32 value);
void *(*ram_address) (const void *physical_address_in_system_memory);
long (*make_isa_dma_table) (
const void *buffer, /* buffer to make a table for */
long buffer_size, /* buffer size */
ulong num_bits, /* dma transfer size that will be used */
isa_dma_entry *table, /* -> caller-supplied scatter/gather table */
long num_entries /* max # entries in table */
);
long (*start_isa_dma) (
long channel, /* dma channel to use */
void *buf, /* buffer to transfer */
long transfer_count, /* # transfers */
uchar mode, /* mode flags */
uchar e_mode /* extended mode flags */
);
long (*start_scattered_isa_dma) (
long channel, /* channel # to use */
const isa_dma_entry *table, /* physical address of scatter/gather table */
uchar mode, /* mode flags */
uchar emode /* extended mode flags */
);
long (*lock_isa_dma_channel) (long channel);
long (*unlock_isa_dma_channel) (long channel);
} isa_bus_manager;
#endif