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authorThomas Bushnell <thomas@gnu.org>1997-02-25 21:28:37 +0000
committerThomas Bushnell <thomas@gnu.org>1997-02-25 21:28:37 +0000
commitf07a4c844da9f0ecae5bbee1ab94be56505f26f7 (patch)
tree12b07c7e578fc1a5f53dbfde2632408491ff2a70 /scsi/compat_30.h
Initial source
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+/*
+ * 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: compat_30.h
+ * Author: Alessandro Forin, Carnegie Mellon University
+ * Date: 4/91
+ *
+ * Compatibility defs to retrofit Mach 3.0 drivers
+ * into Mach 2.6.
+ */
+
+#ifndef _SCSI_COMPAT_30_
+#define _SCSI_COMPAT_30_
+
+#include <kern/assert.h>
+
+#ifdef MACH_KERNEL
+/*
+ * Mach 3.0 compiles with these definitions
+ */
+
+#include <device/param.h>
+#include <device/io_req.h>
+#include <device/device_types.h>
+#include <device/disk_status.h>
+
+/*
+ * Scratch temporary in io_req structure (for error handling)
+ */
+#define io_temporary io_error
+
+#else /*MACH_KERNEL*/
+/*
+ * Mach 2.x compiles with these definitions
+ */
+
+/* ??? */
+typedef int dev_mode_t;
+typedef int *dev_status_t; /* Variable-length array of integers */
+/* ??? */
+
+/* Buffer structures */
+
+typedef int io_return_t;
+
+#include <sys/param.h>
+#include <sys/buf.h>
+
+#define io_req buf
+typedef struct buf *io_req_t;
+
+#define io_req_alloc(ior,size) ior = geteblk(size)
+#define io_req_free(ior) brelse(ior)
+
+/*
+ * Redefine fields for drivers using new names
+ */
+#define io_op b_flags
+#define io_count b_bcount
+#define io_error b_error
+#define io_unit b_dev
+#define io_recnum b_blkno
+#define io_residual b_resid
+#define io_data b_un.b_addr
+#define io_done b_iodone
+
+/*
+ * Redefine fields for driver request list heads, using new names.
+ */
+#define io_next av_forw
+#define io_prev av_back
+/*#define io_next b_actf*/
+/*#define io_prev b_actl*/
+#define io_link b_forw
+#define io_rlink b_back
+/*#define io_count b_active*/
+/*#define io_residual b_errcnt*/
+#define io_alloc_size b_bufsize
+
+/*
+ * Scratch temporary in io_req structure (for error handling)
+ */
+#define io_temporary b_pfcent
+
+/*
+ * Redefine flags
+ */
+#define IO_WRITE B_WRITE
+#define IO_READ B_READ
+#define IO_OPEN B_OPEN
+#define IO_DONE B_DONE
+#define IO_ERROR B_ERROR
+#define IO_BUSY B_BUSY
+#define IO_WANTED B_WANTED
+#define IO_BAD B_BAD
+#define IO_CALL B_CALL
+#define IO_INTERNAL B_MD1
+
+#define IO_SPARE_START B_MD1
+
+#include <sys/disklabel.h>
+
+/* Error codes */
+
+#include <sys/errno.h>
+
+#define D_SUCCESS ESUCCESS
+#define D_IO_ERROR EIO
+#define D_NO_SUCH_DEVICE ENXIO
+#define D_INVALID_SIZE EINVAL
+#define D_ALREADY_OPEN EBUSY
+#define D_INVALID_OPERATION EINVAL
+#define D_NO_MEMORY ENOMEM
+#define D_WOULD_BLOCK EWOULDBLOCK
+#define D_DEVICE_DOWN EIO
+#define D_READ_ONLY EROFS
+
+/*
+ * Debugging support
+ */
+#define db_printf kdbprintf
+#define db_printsym(s,m) kdbpsymoff(s,1,"")
+
+/*
+ * Miscellaneous utils
+ */
+
+#define check_memory(addr,dow) ((dow) ? wbadaddr(addr,4) : badaddr(addr,4))
+
+#include <sys/kernel.h> /* for hz */
+#include <scsi/adapters/scsi_user_dma.h>
+
+#ifdef DECSTATION
+#include <mach/mips/vm_param.h> /* for page size */
+#define ULTRIX_COMPAT 1 /* support for rzdisk disk formatter */
+#endif /*DECSTATION*/
+
+#endif /*MACH_KERNEL*/
+
+#endif /*_SCSI_COMPAT_30_*/