This is the new unified bootstrap, sometimes known previously as the

'three-stage' bootstrap.
There are a number of caveats with the code in its current state:
 - The i386 bootstrap only supports booting from a floppy.
 - The kernel and kld do not yet know how to deal with the extended
   information and module summary passed in.
 - PnP-based autodetection and demand loading of modules is not implemented.
 - i386 ELF kernel loading is not ready yet.
 - The i386 bootstrap is loaded via an ugly blockmap.

On the alpha, both net- and disk-booting (SRM console machines only) is
supported.  No blockmaps are used by this code.

Obtained from:	Parts from the NetBSD/i386 standalone bootstrap.

1 files changed, 61 insertions, 0 deletions

diff --git a/sys/boot/common/devopen.c b/sys/boot/common/devopen.c
new file mode 100644
index 0000000..bb03f3d
--- /dev/null
+++ b/sys/boot/common/devopen.c
@@ -0,0 +1,61 @@
+/*-
+ * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
+ *
+ *	$Id$
+ */
+
+
+#include <stand.h>
+#include <string.h>
+
+#include "bootstrap.h"
+
+int
+devopen(struct open_file *f, const char *fname, char **file) 
+{
+    struct devdesc	*dev;
+    int			result;
+
+    if ((result = archsw.arch_getdev((void *)&dev, fname, file)) == 0) {	/* get the device */
+	/* point to device-specific data so that device open can use it */
+	f->f_devdata = dev;
+	if ((result = dev->d_dev->dv_open(f, dev)) == 0) { 		/* try to open it */
+	    /* reference the devsw entry from the open_file structure */
+	    f->f_dev = dev->d_dev;
+	} else {
+	    free(dev);		/* release the device descriptor */
+	}
+    }
+    return(result);
+}
+
+int
+devclose(struct open_file *f)
+{
+    if (f->f_devdata != NULL) {
+	free(f->f_devdata);
+    }
+    return(0);
+}