Support md root for INSTALL.

sys/arch/newsmips/conf/files.newsmips

@@ -1,4 +1,4 @@
-#	$NetBSD: files.newsmips,v 1.4 1999/06/07 20:31:32 thorpej Exp $
+#	$NetBSD: files.newsmips,v 1.5 1999/11/10 13:33:10 tsubai Exp $
 # NEWS-specific configuration info
 
 # maxpartitions must be first item in files.${ARCH}.
@@ -83,18 +83,23 @@ file arch/newsmips/newsmips/mainbus.c
 file arch/newsmips/newsmips/cpu_cons.c
 file dev/cons.c
 
-major {md = 2}
-
 #
 # Machine-independent SCSI driver.
 #
 
 include "dev/scsipi/files.scsipi"
-major { sd = 0 }
-major { fd = 1 }
-major { cd = 16 }
 
 device sc: scsi
 file arch/newsmips/dev/scsi_1185.c		sc needs-count
 file arch/newsmips/dev/sc_wrap.c		sc
 attach sc at hb
+
+#
+# Memory Disk for install floppy
+#
+file arch/newsmips/newsmips/md_root.c		memory_disk_hooks
+
+major { sd = 0 }
+major { fd = 1 }
+major { md = 2 }
+major { cd = 16 }

sys/arch/newsmips/newsmips/md_root.c

@@ -0,0 +1,85 @@
+/*	$NetBSD: md_root.c,v 1.1 1999/11/10 13:33:09 tsubai Exp $	*/
+
+/*
+ * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
+ * Copyright (c) 1995 Gordon W. Ross
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/reboot.h>
+
+#include <dev/md.h>
+
+#include "opt_mdsize.h"
+
+extern int boothowto;
+
+#ifndef MINIROOTSIZE
+#define MINIROOTSIZE 512
+#endif
+
+#define ROOTBYTES (MINIROOTSIZE << DEV_BSHIFT)
+
+/*
+ * This array will be patched to contain a file-system image.
+ */
+u_int32_t md_root_size = ROOTBYTES;
+char md_root_image[ROOTBYTES] = "|This is the root ramdisk!\n";
+
+/*
+ * This is called during autoconfig.
+ */
+void
+md_attach_hook(unit, md)
+	int unit;
+	struct md_conf *md;
+{
+
+	if (unit == 0) {
+		/* Setup root ramdisk */
+		md->md_addr = (caddr_t)md_root_image;
+		md->md_size = (size_t)md_root_size;
+		md->md_type = MD_KMEM_FIXED;
+		printf("md%d: internal %dK image area\n", unit,
+		    ROOTBYTES / 1024);
+	}
+}
+
+/*
+ * This is called during open (i.e. mountroot)
+ */
+void
+md_open_hook(unit, md)
+	int unit;
+	struct md_conf *md;
+{
+
+	if (unit == 0) {
+		/* The root ramdisk only works single-user. */
+		boothowto |= RB_SINGLE;
+	}
+}