Initial /boot stuff (from Mickey)

1 files changed, 115 insertions, 0 deletions

diff --git a/sys/arch/i386/stand/boot/crt0.c b/sys/arch/i386/stand/boot/crt0.c
new file mode 100644
index 00000000000..14802aeb187
--- /dev/null
+++ b/sys/arch/i386/stand/boot/crt0.c
@@ -0,0 +1,115 @@
+/*	$OpenBSD: crt0.c,v 1.1 1997/03/31 03:12:04 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/types.h>
+#include <sys/mman.h>
+#include <sys/syscall.h>
+#include <termios.h>
+#include "libsa.h"
+#include "unixdev.h"
+
+extern void start __P((void)) asm("start");
+extern int  main __P((int, char **, char **));
+static void domap __P((void));
+static void seterm __P((void));
+
+void
+start()
+{
+	domap();
+	seterm();
+	uexit(main(0, NULL, NULL));
+}
+
+#define ummap(a,l,p,f,fd,o) (caddr_t)syscall((quad_t)SYS_mmap,a,l,p,f,fd,0,o)
+
+static void
+domap()
+{
+	extern char end[];
+	register caddr_t p = (caddr_t)(((u_long)end + PGOFSET) & ~PGOFSET);
+	register size_t sz = 0x10000 - (u_long)p - NBPG;
+
+#ifdef DEBUG
+	/* we are low on memory w/ the DEBUG defined ); */
+	sz = 40 * NBPG;
+#endif
+
+	/* map heap */
+	if ( (p = ummap(p, sz, PROT_READ|PROT_WRITE,
+		   MAP_FIXED|MAP_ANON, -1, 0)) == (caddr_t)-1) {
+		printf("mmap failed: %d\n", errno);
+		uexit(1);
+	}
+#ifdef DEBUG
+	else
+		printf("mmap==%p\n", p);
+#endif
+
+	/* map kernel */
+	if ( (p = ummap(0x100000, 0xf00000, PROT_READ|PROT_WRITE,
+		   MAP_FIXED|MAP_ANON, -1, 0)) == (caddr_t)-1) {
+		printf("mmap failed: %d\n", errno);
+		uexit(1);
+	}
+#ifdef DEBUG
+	else
+		printf("mmap==%p\n", p);
+#endif
+
+}
+
+void
+seterm()
+{
+	struct termios tc;
+
+	if (uioctl(0, TIOCGETA, (char *)&tc) < 0) {
+		printf("cannot get tty\n");
+		uexit(1);
+	}
+
+        tc.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
+        tc.c_oflag &= ~OPOST;
+        tc.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
+        tc.c_cflag &= ~(CSIZE|PARENB);
+        tc.c_cflag |= CS8;
+
+	if (uioctl(0, TIOCSETA, (char *)&tc) < 0) {
+		printf("cannot set tty\n");
+		uexit(1);
+	}
+}