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authorTobias Weingartner <weingart@cvs.openbsd.org>1997-03-31 03:12:20 +0000
committerTobias Weingartner <weingart@cvs.openbsd.org>1997-03-31 03:12:20 +0000
commitdb37cd8003c371210064ba9f9a9c279f13a175d2 (patch)
tree95a740b2174d900a416d0fd7fac0895c9e3972ab /sys/arch/i386/stand/boot/boot.c
parent1dc40aae41ae95a97b3d0955f1cf85385b6de1a4 (diff)
Initial /boot stuff (from Mickey)
Diffstat (limited to 'sys/arch/i386/stand/boot/boot.c')
-rw-r--r--sys/arch/i386/stand/boot/boot.c130
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