date and time created 90/04/24 19:56:22 by william

SCCS-vsn: sys/i386/stand/bootxx.c 7.1

diff --git a/usr/src/sys/i386/stand/bootxx.c b/usr/src/sys/i386/stand/bootxx.c
new file mode 100644 (file)
index 0000000..9b11fc8
--- /dev/null
+++ b/usr/src/sys/i386/stand/bootxx.c
@@ -0,0 +1,105 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * %sccs.include.noredist.c%
+ *
+ *     @(#)bootxx.c    7.1 (Berkeley) %G%
+ */
+
+#include "../h/param.h"
+#include "../h/inode.h"
+#include "../h/fs.h"
+#include <a.out.h>
+#include "saio.h"
+#include "../h/reboot.h"
+#include "../h/dir.h"
+#include "../h/disk.h"
+#include "devvm.h"
+
+extern int howto, bootdev, unit, cyloffset, boottype;
+extern char bootprog[] ;
+/*
+ * Boot program... arguments passed in r10 and r11
+ * are passed through to the full boot program.
+ */
+
+main()
+{
+       register int io, partition; register char *bp ;
+
+#ifdef lint
+       howto = 0; devtype = 0;
+#endif
+       extern struct disklabel disklabel;
+
+       /* are we a disk, if so look at disklabel and do things */
+       if (bootdev == 0 || bootdev == 3) {
+           /*
+            * Synthesize bootdev from unit, type and partition
+            * from the ROM monitor.
+            * It's dirty work, but someone's got to do it, and
+            * we always seem to get it.
+            */
+           for (io = 0; io < 8; io++)
+               if (bootdev > 0) { /* XXX should check dk_type == DTYPE_SCSI */
+                       if (disklabel.dk_partition[io].cyloff
+                               == cyloffset * disklabel.dk_secpercyl)
+                               break;
+               } else {
+       
+                       if (disklabel.dk_partition[io].cyloff == cyloffset)
+                       break;
+               }
+           if (io == 8) io = 0; /* probably a bad or non-existant disklabel */
+           bootdev = makedev(bootdev, make_minor(unit, io));
+       } else { io = 0 ; howto = (howto&0x7) | 3 ; }
+       bp = bootprog ;
+       while (*bp != '0') bp++ ;       /* n-char device names instead of 2 */
+       *bp++ = unit % 10 + '0' ;
+       *bp += io % 10 ;
+/*     bootprog[3] = unit % 10 + '0';
+       bootprog[4] = io % 10 + 'a';*/
+       printf("loading %s\n", bootprog);
+       io = open(bootprog, 0);
+       if (io >= 0)
+               copyunix(io);
+       _stop("boot failed\n");
+}
+
+/*ARGSUSED*/
+copyunix(io)
+       register io;    
+{
+       struct exec x;
+       register int i;
+       char *addr;
+
+       i = read(io, (char *)&x, sizeof x);
+       if (i != sizeof x ||
+           (x.a_magic != 0407 && x.a_magic != 0413 && x.a_magic != 0410))
+               _stop("Bad format\n");
+       if ((x.a_magic == 0413 || x.a_magic == 0410) &&
+           lseek(io, 0x400, 0) == -1)
+               goto shread;
+       if (read(io, (char *)0, x.a_text) != x.a_text)
+               goto shread;
+       addr = (char *)x.a_text;
+       if (x.a_magic == 0413 || x.a_magic == 0410)
+               while ((int)addr & CLOFSET)
+                       *addr++ = 0;
+       if (read(io, addr, x.a_data) != x.a_data)
+               goto shread;
+       addr += x.a_data;
+       x.a_bss += 128*512;     /* slop */
+       for (i = 0; i < x.a_bss; i++)
+               *addr++ = 0;
+       setregs();
+       (*((int (*)()) x.a_entry))();
+       return;
+shread:
+       _stop("Short read\n");
+}