Initial /boot stuff (from Mickey)

1 files changed, 130 insertions, 0 deletions

diff --git a/sys/arch/i386/stand/boot/boot.c b/sys/arch/i386/stand/boot/boot.c
new file mode 100644
index 00000000000..5770f608d53
--- /dev/null
+++ b/sys/arch/i386/stand/boot/boot.c
@@ -0,0 +1,130 @@
+/*	$OpenBSD: boot.c,v 1.2 1997/03/31 03:12:03 weingart Exp $	*/
+/*
+ * Copyright (c) 1997 Michael Shalayeff
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Michael Shalayeff.
+ * 4. 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 REGENTS 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.
+ *
+ */
+
+#include <sys/param.h>
+#include <sys/reboot.h>
+#include <sys/stat.h>
+#include <a.out.h>
+#include <sys/disklabel.h>
+#include <libsa.h>
+#include "cmd.h"
+
+/*
+ * Boot program, loaded by boot block from remaing 7.5K of boot area.
+ * Sifts through disklabel and attempts to load an program image of
+ * a standalone program off the disk. If keyboard is hit during load,
+ * or if an error is encounter, try alternate files.
+ */
+
+char *kernels[] = {
+	"bsd", "bsd.gz",
+	"obsd", "obsd.gz",
+	"bsd.old", "bsd.old.gz",
+	NULL
+};
+
+int	retry = 0;
+extern	char version[];
+extern dev_t bootdev;
+extern int boothowto;
+int	cnvmem, extmem, probemem;
+
+void	boot ();
+struct cmd_state cmd;
+
+/*
+ * Boot program... loads /boot out of filesystem indicated by arguements.
+ * We assume an autoboot unless we detect a misconfiguration.
+ */
+void
+boot()
+{
+	register char *bootfile = kernels[0];
+	register int i;
+
+
+	/* Get memory size */
+	cnvmem = memsize(0);
+	extmem = memsize(1);
+	gateA20(1);
+	probemem = memprobe();
+
+
+	/* XXX init cmd here to cut on .data !!! */
+	strncpy(cmd.bootdev,
+#ifdef _TEST
+		"/dev/rfd0a",
+#else
+		"fd(0,a)",
+#endif
+		sizeof(cmd.bootdev));
+	cmd.image[0] = '\0';
+	cmd.cwd[0] = '/';
+	cmd.cwd[1] = '\0';
+	cmd.addr = (void *)0x100000;
+	cmd.timeout = 50000;
+
+	printf("\n>> OpenBSD BOOT: %d/%d (%d) k [%s]\n",
+		cnvmem, extmem, probemem, version);
+
+	for (i = 0;;) {
+
+		strncpy(cmd.image, bootfile, sizeof(cmd.image));
+
+		do {
+			printf("boot> ");
+		} while(!getcmd(&cmd) && !execmd(&cmd));
+
+		sprintf(cmd.path, "%s%s%s", cmd.bootdev, cmd.cwd, bootfile);
+		printf("\nbooting %s: ", cmd.path);
+		exec (cmd.path, cmd.addr, boothowto);
+
+		if(kernels[++i] == NULL)
+			bootfile = kernels[i=0];
+		else
+			bootfile = kernels[i];
+
+		cmd.timeout += 20;
+
+		printf(" failed(%d)\nwill try %s\n", errno, bootfile);
+	}
+}
+
+#ifdef _TEST
+int
+main()
+{
+	boot();
+	return 0;
+}
+#endif