1997-01-08 15:57:22 +03:00
|
|
|
/* $NetBSD: xxboot.ahdi.s,v 1.4 1997/01/08 12:57:22 leo Exp $ */
|
1996-02-29 14:35:46 +03:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Copyright (c) 1995 Waldi Ravens.
|
|
|
|
* 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 Waldi Ravens.
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "xxboot.h"
|
|
|
|
|
|
|
|
.globl start, main, fill, end
|
|
|
|
|
|
|
|
.text
|
|
|
|
|
|
|
|
start: bras main
|
|
|
|
/*
|
|
|
|
* Fake gemdos-fs bootsector, to keep TOS away.
|
|
|
|
*/
|
|
|
|
.ascii "NetBSD" | oem
|
|
|
|
.byte 0,0,0 | serial
|
|
|
|
.word 0 | bps
|
|
|
|
.byte 0 | spc
|
|
|
|
.word 0 | res
|
|
|
|
.byte 0 | fat
|
|
|
|
.word 0 | ndirs
|
|
|
|
.word 0 | sec
|
|
|
|
.byte 0 | media
|
|
|
|
.word 0 | spf
|
|
|
|
.word 0 | spt
|
|
|
|
.word 0 | side
|
|
|
|
.word 0 | hid
|
|
|
|
.even
|
|
|
|
/*
|
|
|
|
* AHDI rootsector code passes:
|
|
|
|
* d3: SCSI/IDE <-> ACSI flag d4: SCSI/IDE target (or -1)
|
|
|
|
* d5: boot preference d6: offset of boot block
|
|
|
|
* d7: ACSI target a3: pointer to readsector()
|
|
|
|
* a4: pointer to `start' a5: pointer to back-to-ROM
|
|
|
|
*/
|
|
|
|
main: movml d3-d7/a3-a5,sp@-
|
|
|
|
lea pc@(regsav),a0
|
|
|
|
movl sp,a0@
|
|
|
|
|
|
|
|
movw #-1,sp@-
|
|
|
|
movw #Kbshift,sp@-
|
|
|
|
trap #BIOS
|
|
|
|
addql #4,sp
|
|
|
|
subql #1,d0
|
|
|
|
movl d0,a5 | autoboot flag
|
|
|
|
|
|
|
|
lea pc@(m_bot),a6
|
|
|
|
movl _membot:w,d3
|
|
|
|
lea MAXBOT,a4
|
|
|
|
cmpl a4,d3
|
|
|
|
bhis exit | membot > MAXBOT
|
|
|
|
|
|
|
|
lea pc@(m_top),a6
|
|
|
|
movl _memtop:w,d3
|
1996-12-29 02:37:53 +03:00
|
|
|
cmpl #MINTOP,d3
|
1996-02-29 14:35:46 +03:00
|
|
|
blts exit | memtop < MINTOP
|
|
|
|
|
|
|
|
andw #-4,d3
|
|
|
|
movl d3,a0
|
|
|
|
movl sp,a0@-
|
|
|
|
movl a0,sp | set new stack
|
|
|
|
/*
|
|
|
|
* Load secondary boot loader and disklabel.
|
|
|
|
*/
|
|
|
|
movml a4/a5,sp@-
|
|
|
|
movq #NSEC,d3 | # of sectors
|
|
|
|
addql #1,d6 | first sector
|
|
|
|
bsr rds1
|
|
|
|
lea pc@(m_rds),a6
|
|
|
|
movml sp@+,a4/a5
|
|
|
|
bnes 0f | I/O error
|
|
|
|
/*
|
|
|
|
* int bootxx(readsector, disklabel, autoboot)
|
|
|
|
*/
|
|
|
|
pea a5@ | autoboot
|
|
|
|
pea a4@(LBLST-MAXBOT) | disklabel
|
|
|
|
pea pc@(rds2) | readsector
|
|
|
|
jsr a4@(BXXST-MAXBOT)
|
|
|
|
lea pc@(m_sbl),a6 | NetBSD not booted
|
|
|
|
lea sp@(12),sp
|
|
|
|
|
|
|
|
0: movl sp@,sp | restore BIOS stack
|
|
|
|
movl d0,d3
|
|
|
|
bmis exit
|
|
|
|
movml sp@+,d3-d7/a3-a5
|
|
|
|
movl d0,d5 | new boot preference
|
|
|
|
jmp a4@(-0x200)
|
|
|
|
|
|
|
|
exit: bsrs puts | display error
|
|
|
|
lea pc@(m_key),a6
|
|
|
|
bsrs puts | wait for key
|
|
|
|
movml sp@+,d3-d7/a3-a5
|
|
|
|
jmp a5@
|
|
|
|
|
|
|
|
/*
|
|
|
|
* puts (in: a6, d3)
|
|
|
|
*/
|
|
|
|
0: cmpw #35,d0 | '#'
|
|
|
|
bnes 1f
|
|
|
|
bsrs puti
|
|
|
|
bras puts
|
|
|
|
1: cmpw #64,d0 | '@'
|
|
|
|
bnes 2f
|
|
|
|
movw #2,sp@-
|
|
|
|
movw #Bconin,sp@-
|
|
|
|
trap #BIOS
|
|
|
|
addql #4,sp
|
|
|
|
bras puts
|
|
|
|
2: bsrs putc
|
|
|
|
puts: movq #0,d0
|
|
|
|
movb a6@+,d0
|
|
|
|
bnes 0b
|
|
|
|
rts
|
|
|
|
|
|
|
|
puti: swap d3
|
|
|
|
bsrs 0f
|
|
|
|
swap d3
|
|
|
|
0: rorw #8,d3
|
|
|
|
bsrs 1f
|
|
|
|
rorw #8,d3
|
|
|
|
1: rorb #4,d3
|
|
|
|
bsrs 2f
|
|
|
|
rorb #4,d3
|
|
|
|
2: movw d3,d0
|
|
|
|
andw #15,d0
|
|
|
|
addw #48,d0
|
|
|
|
cmpw #58,d0
|
|
|
|
bcss putc
|
|
|
|
addw #39,d0
|
|
|
|
putc: movw d0,sp@-
|
|
|
|
movw #2,sp@-
|
|
|
|
movw #Bconout,sp@-
|
|
|
|
trap #BIOS
|
|
|
|
addql #6,sp
|
|
|
|
rts
|
|
|
|
/*
|
|
|
|
* int readsec (void *buffer, u_int offset, u_int count);
|
|
|
|
*/
|
|
|
|
rds2: movml d2-d7/a2-a6,sp@-
|
|
|
|
movl pc@(regsav),a0
|
|
|
|
movml a0@,d3-d7/a3-a5
|
|
|
|
movl sp@(48),a4 | buffer
|
|
|
|
movl sp@(52),d6 | offset
|
|
|
|
movl sp@(56),d3 | count
|
|
|
|
bsrs rds1
|
|
|
|
movml sp@+,d2-d7/a2-a6
|
|
|
|
rts
|
|
|
|
|
|
|
|
rds1: movl #255,d5
|
|
|
|
cmpl d5,d3
|
|
|
|
bccs 0f
|
|
|
|
movl d3,d5
|
|
|
|
0: jsr a3@
|
|
|
|
tstl d0
|
|
|
|
bnes 1f
|
|
|
|
addl #(255*512),a4
|
|
|
|
addl d5,d6
|
|
|
|
subl d5,d3
|
|
|
|
bnes rds1
|
|
|
|
1: rts
|
|
|
|
|
|
|
|
m_bot: .asciz "xxboot: membot == 0x#\r\n"
|
|
|
|
m_top: .asciz "xxboot: memtop == 0x#\r\n"
|
|
|
|
m_sbl: .asciz "xxboot: bootxx => 0x#\r\n"
|
|
|
|
m_rds: .asciz "xxboot: Floprd => 0x#\r\n"
|
|
|
|
m_key: .asciz "\007\r\npress any key... @\r\n"
|
|
|
|
|
|
|
|
regsav: .long 0
|
|
|
|
|
1997-01-08 15:57:22 +03:00
|
|
|
fill: .space 54 | 510-(fill-start)
|
1996-02-29 14:35:46 +03:00
|
|
|
.word 0 | checksum
|
|
|
|
end:
|