404b8fce6b
scsi target to a disk unit for setroot(). If anyone knows a better way to do this, please let me know. The only other way I could think of would be to add a field in disk.h:struct dkdevice to reference the scsi target. Ideally, the correct boot device would be passed in from the booter. As we only have one scsi bus (until we support NuBUS scsi cards), it makes sense to be backward-compatible (especially since mac weenies seem to need help tying their shoes).
99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/*
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* SCSI changer interface description
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*/
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/*
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* Written by Stefan Grefen (grefen@goofy.zdv.uni-mainz.de soon grefen@convex.com)
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* based on the SCSI System by written Julian Elischer (julian@tfs.com)
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* for TRW Financial Systems.
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*
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* TRW Financial Systems, in accordance with their agreement with Carnegie
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* Mellon University, makes this software available to CMU to distribute
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* or use in any manner that they see fit as long as this message is kept with
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* the software. For this reason TFS also grants any other persons or
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* organisations permission to use or modify this software.
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*
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* TFS supplies this software to be publicly redistributed
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* on the understanding that TFS is not responsible for the correct
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* functioning of this software in any circumstances.
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*
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* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
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*
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* $Id: scsi_changer.h,v 1.3 1994/01/30 01:21:26 briggs Exp $
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*/
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#ifndef _SCSI_SCSI_CHANGER_H
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#define _SCSI_SCSI_CHANGER_H 1
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/*
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* SCSI command format
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*/
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struct scsi_read_element_status
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{
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u_char op_code;
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u_char byte2;
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#define SRES_ELEM_TYPE_CODE 0x0F
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#define SRES_ELEM_VOLTAG 0x10
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u_char starting_element_addr[2];
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u_char number_of_elements[2];
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u_char resv1;
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u_char allocation_length[3];
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u_char resv2;
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u_char control;
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};
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#define RE_ALL_ELEMENTS 0
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#define RE_MEDIUM_TRANSPORT_ELEMENT 1
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#define RE_STORAGE_ELEMENT 2
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#define RE_IMPORT_EXPORT 3
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#define RE_DATA_TRANSFER_ELEMENT 4
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struct scsi_move_medium
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{
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u_char op_code;
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u_char byte2;
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u_char transport_element_address[2];
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u_char source_address[2];
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u_char destination_address[2];
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u_char rsvd[2];
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u_char invert;
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u_char control;
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};
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struct scsi_position_to_element
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{
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u_char op_code;
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u_char byte2;
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u_char transport_element_address[2];
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u_char source_address[2];
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u_char rsvd[2];
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u_char invert;
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u_char control;
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};
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/*
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* Opcodes
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*/
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#define POSITION_TO_ELEMENT 0x2b
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#define MOVE_MEDIUM 0xa5
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#define READ_ELEMENT_STATUS 0xb8
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struct scsi_element_status_data
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{
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u_char first_element_reported[2];
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u_char number_of_elements_reported[2];
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u_char rsvd;
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u_char byte_count_of_report[3];
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};
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struct element_status_page
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{
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u_char element_type_code;
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u_char flags;
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#define ESP_AVOLTAG 0x40
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#define ESP_PVOLTAG 0x80
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u_char element_descriptor_length[2];
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u_char rsvd;
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u_char byte_count_of_descriptor_data[3];
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};
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#endif /*_SCSI_SCSI_CHANGER_H*/
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