1 files changed, 72 insertions, 0 deletions
diff --git a/sys/arch/mvme68k/stand/sboot/XBUG.S b/sys/arch/mvme68k/stand/sboot/XBUG.S
new file mode 100644
index 00000000000..8b1e52f76a6
--- /dev/null
+++ b/sys/arch/mvme68k/stand/sboot/XBUG.S
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 1995 Theo de Raadt
+ * 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 Theo de Raadt
+ * 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 AUTHOR 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.
+ */
+
+/*
+ * Theo sez: I wrote a bootrom for the MVME147 *years* ago. To write
+ * this ROM I copied a few chunks from the old bootrom, like this piece:
+ * 
+ * "watch this, the moto bastard struck here, shouldn't have hired people
+ * from intel I tried to tell them...
+ *       "BOOT"
+ *       offset from baseaddr to entry point.
+ *       offset from baseaddr to first word after checksum
+ *       garbage
+ *       checksum made with CS command
+ * No need to change any of this unless you try to take our names out
+ * of there. Ie. don't touch."
+ */
+
+		.text
+bootlabel:	.ascii	"BOOT"
+		.long	bootstart-0xffa00000	| for rom install
+		.long	bootlabelend - bootlabel
+		.asciz	"VME147 rboot Copyright (c) 1995 Theo de Raadt"
+		.align	2
+bootstart:	jmp	bssclr
+		.word	0x229c			| XXX bitching cksum!
+bootlabelend:
+		.word	0
+
+		| clear bss and the kernel location
+bssclr:		movl	#_edata,a0
+		movl	#_end - _edata,d0
+1:		clrb	a0@+
+		subql	#1,d0
+		bpl	1b
+
+		| rip the data segment from ROM into ram..
+		movl	#_etext,a2		| start of data
+		movl	#0x4000,a1		| shovel address
+		movl	#_edata - _etext,d0
+1:		movb	a2@+,a1@+
+		subql	#1,d0
+		bpl	1b
+
+		bra	start