diff options
Diffstat (limited to 'sys/arch/mvme88k/stand/sboot/XBUG.S')
| -rw-r--r-- | sys/arch/mvme88k/stand/sboot/XBUG.S | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/sys/arch/mvme88k/stand/sboot/XBUG.S b/sys/arch/mvme88k/stand/sboot/XBUG.S new file mode 100644 index 00000000000..288f1427b21 --- /dev/null +++ b/sys/arch/mvme88k/stand/sboot/XBUG.S @@ -0,0 +1,73 @@ +/* + * Copyright (c) 1995 Theo de Raadt + * + * 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 under OpenBSD by + * Theo de Raadt for Willowglen Singapore. + * 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 |