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Diffstat (limited to 'scsi/rz.h')
| -rw-r--r-- | scsi/rz.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/scsi/rz.h b/scsi/rz.h new file mode 100644 index 0000000..7fa7b88 --- /dev/null +++ b/scsi/rz.h @@ -0,0 +1,60 @@ +/* + * Mach Operating System + * Copyright (c) 1991,1990 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * File: rz.h + * Author: Alessandro Forin, Carnegie Mellon University + * Date: 9/90 + * + * Mapping between U*x-like indexing and controller+slave + * Each controller handles at most 8 slaves, few controllers. + */ + +#if 0 +#define rzcontroller(dev) (((dev)>>6)&0x3) +#define rzslave(dev) (((dev)>>3)&0x7) +#endif 0 +#define rzcontroller(dev) (((dev)>>13)&0x3) +#define rzslave(dev) (((dev)>>10)&0x7) + +#if 0 +#define rzpartition(dev) ((PARTITION_TYPE(dev)==0xf)?MAXPARTITIONS:((dev)&0x7)) +#endif 0 +#define rzpartition(dev) ((dev)&0x3ff) + +/* To address the full 256 luns use upper bits 8..12 */ +/* NOTE: Under U*x this means the next major up.. what a mess */ +#define rzlun(dev) (((dev)&0x7) | (((dev)>>5)&0xf8)) + +/* note: whatever this was used for is no longer cared about -- Kevin */ +#define PARTITION_TYPE(dev) (((dev)>>24)&0xf) +#define PARTITION_ABSOLUTE (0xf<<24) + +#ifdef MACH_KERNEL +#else /*MACH_KERNEL*/ +#define tape_unit(dev) ((((dev)&0xe0)>>3)|((dev)&0x3)) +#define TAPE_UNIT(dev) ((dev)&(~0xff))|(tape_unit((dev))<<3) +#define TAPE_REWINDS(dev) (((dev)&0x1c)==0)||(((dev)&0x1c)==8) +#endif /*MACH_KERNEL*/ |