sdb00t.ahdi.S revision 1.1
1 1.1 he /* $NetBSD: sdb00t.ahdi.S,v 1.1 2003/10/28 11:34:59 he Exp $ */ 2 1.1 he 3 1.1 he /* 4 1.1 he * Copyright (c) 1995 Waldi Ravens 5 1.1 he * All rights reserved. 6 1.1 he * 7 1.1 he * Redistribution and use in source and binary forms, with or without 8 1.1 he * modification, are permitted provided that the following conditions 9 1.1 he * are met: 10 1.1 he * 1. Redistributions of source code must retain the above copyright 11 1.1 he * notice, this list of conditions and the following disclaimer. 12 1.1 he * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 he * notice, this list of conditions and the following disclaimer in the 14 1.1 he * documentation and/or other materials provided with the distribution. 15 1.1 he * 3. All advertising materials mentioning features or use of this software 16 1.1 he * must display the following acknowledgement: 17 1.1 he * This product includes software developed by Waldi Ravens. 18 1.1 he * 4. The name of the author may not be used to endorse or promote products 19 1.1 he * derived from this software without specific prior written permission 20 1.1 he * 21 1.1 he * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 1.1 he * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 1.1 he * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 1.1 he * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 1.1 he * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 1.1 he * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 1.1 he * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 1.1 he * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 1.1 he * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 1.1 he * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 1.1 he */ 32 1.1 he 33 1.1 he #include "xxboot.h" 34 1.1 he 35 1.1 he #ifdef __ELF__ 36 1.1 he .globl _start, main, fill 37 1.1 he 38 1.1 he .text 39 1.1 he 40 1.1 he _start: bras main 41 1.1 he #else 42 1.1 he .globl start, main, fill 43 1.1 he 44 1.1 he .text 45 1.1 he 46 1.1 he start: bras main 47 1.1 he #endif 48 1.1 he bra rds0 49 1.1 he 50 1.1 he main: bclr #2,(_drvbits+3):w 51 1.1 he clrl pun_ptr:w 52 1.1 he movml %d3/%d5,%sp@- 53 1.1 he movw #-1,%sp@- 54 1.1 he movw #Kbshift,%sp@- 55 1.1 he trap #BIOS 56 1.1 he addql #4,%sp 57 1.1 he btst #3,%d0 | Alternate? 58 1.1 he bnes exit 59 1.1 he movq #3,%d0 60 1.1 he lea %pc@(p0_dsc),%a0 61 1.1 he cmpl #0x444d4172,%d3 | SCSI bootdev? 62 1.1 he beqs 0f 63 1.1 he movq #-1,%d4 | no, ACSI 64 1.1 he movq #0,%d5 65 1.1 he 0: movb %d5,%d1 | NVRAM bootpref 66 1.1 he bnes 1f 67 1.1 he 68 1.1 he | The Hades bios does not provide a bootprev. In case 69 1.1 he | of doubt, we fetch it ourselves. 70 1.1 he moveml %d0-%d2/%a0-%a2,%sp@- 71 1.1 he pea bpref 72 1.1 he movw #1, %sp@- 73 1.1 he movw #1, %sp@- 74 1.1 he movw #0, %sp@- 75 1.1 he movw #NVMaccess, %sp@- 76 1.1 he trap #XBIOS 77 1.1 he lea %sp@(12),%sp 78 1.1 he moveml %sp@+,%d0-%d2/%a0-%a2 79 1.1 he movb bpref:w,%d1 80 1.1 he bnes 1f 81 1.1 he movq #-8,%d1 | bootpref = any 82 1.1 he 83 1.1 he 1: movb %a0@,%d2 | bootflags 84 1.1 he btst #0,%d2 85 1.1 he beqs 2f 86 1.1 he andb %d1,%d2 87 1.1 he bnes boot 88 1.1 he 2: lea %a0@(12),%a0 89 1.1 he dbra %d0,1b 90 1.1 he 91 1.1 he exit: movml %sp@+,%d3/%d5 92 1.1 he tostst: clrw _bootdev:w 93 1.1 he movl _sysbase:w,%a0 94 1.1 he movl %a0@(24),%d0 95 1.1 he swap %d0 96 1.1 he cmpl #0x19870422,%d0 | old TOS? 97 1.1 he bccs 0f | no 98 1.1 he movw #0xe0,%d7 99 1.1 he 0: rts 100 1.1 he 101 1.1 he boot: movl %a0@(4),%d6 102 1.1 he movq #1,%d5 103 1.1 he lea %pc@(end),%a4 104 1.1 he bsrs rds0 105 1.1 he tstw %d0 106 1.1 he bnes exit 107 1.1 he movl %a4,%a0 108 1.1 he movw #0xff,%d0 109 1.1 he movq #0,%d1 110 1.1 he 0: addw %a0@+,%d1 111 1.1 he dbra %d0,0b 112 1.1 he cmpw #0x1234,%d1 113 1.1 he bnes exit 114 1.1 he lea %pc@(rds0),%a3 115 1.1 he lea %pc@(tostst),%a5 116 1.1 he movml %sp@+,%d3/%d5 117 1.1 he jmp %a4@ | start bootsector code 118 1.1 he /* 119 1.1 he * in: d4/d7 (target) d5 (count), d6 (offset), a4 (buffer) 120 1.1 he * out: d0 (<= 0) 121 1.1 he * mod: d0, d1, d2, a0, a1, a5, a6 122 1.1 he */ 123 1.1 he rds0: tstl %d4 124 1.1 he bmis 0f 125 1.1 he movw %d4,%sp@- | device 126 1.1 he pea %a4@ | buffer 127 1.1 he movw %d5,%sp@- | count 128 1.1 he movl %d6,%sp@- | offset 129 1.1 he movw #DMAread,%sp@- 130 1.1 he trap #XBIOS 131 1.1 he lea %sp@(14),%sp 132 1.1 he rts 133 1.1 he 134 1.1 he 0: st flock:w 135 1.1 he movl _hz_200:w,%d0 136 1.1 he addql #2,%d0 137 1.1 he 1: cmpl _hz_200:w,%d0 138 1.1 he bccs 1b 139 1.1 he movml %d6/%a4,%sp@- 140 1.1 he lea dmahi:w,%a6 141 1.1 he movb %sp@(7),%a6@(4) 142 1.1 he movb %sp@(6),%a6@(2) 143 1.1 he movb %sp@(5),%a6@ 144 1.1 he lea %pc@(r0com),%a6 145 1.1 he movb %sp@(1),%a6@(1) 146 1.1 he movb %sp@(2),%a6@(5) 147 1.1 he movb %sp@(3),%a6@(9) 148 1.1 he movb %d5,%a6@(13) 149 1.1 he addql #8,%sp 150 1.1 he lea dmodus:w,%a6 151 1.1 he lea daccess:w,%a5 152 1.1 he movw #0x198,%a6@ 153 1.1 he movw #0x098,%a6@ 154 1.1 he movw %d5,%a5@ 155 1.1 he movw #0x88,%a6@ 156 1.1 he movq #0,%d0 157 1.1 he movb %d7,%d0 158 1.1 he orb #0x08,%d0 159 1.1 he swap %d0 160 1.1 he movw #0x8a,%d0 161 1.1 he bsrs shake 162 1.1 he lea %pc@(r0com),%a0 163 1.1 he movq #3,%d2 164 1.1 he 2: movl %a0@+,%d0 165 1.1 he bsrs shake 166 1.1 he dbra %d2,2b 167 1.1 he movq #0x0a,%d0 168 1.1 he movl %d0,%a5@ 169 1.1 he movl #0x190,%d1 170 1.1 he bsrs wait 171 1.1 he movw #0x8a,%a6@ 172 1.1 he movw %a5@,%d0 173 1.1 he andw #0xff,%d0 174 1.1 he beqs 0f 175 1.1 he r0err: movq #-1,%d0 176 1.1 he 0: movw #0x80,%a6@ 177 1.1 he clrb flock:w 178 1.1 he r0ret: rts 179 1.1 he 180 1.1 he shake: movl %d0,%a5@ 181 1.1 he movq #0x0a,%d1 182 1.1 he wait: addl _hz_200:w,%d1 183 1.1 he 0: btst #5,gpip:w 184 1.1 he beqs r0ret 185 1.1 he cmpl _hz_200:w,%d1 186 1.1 he bccs 0b 187 1.1 he addql #4,%sp 188 1.1 he bras r0err 189 1.1 he 190 1.1 he r0com: .long 0x0000008a 191 1.1 he .long 0x0000008a 192 1.1 he .long 0x0000008a 193 1.1 he .long 0x0001008a 194 1.1 he bpref: .word 0 195 1.1 he 196 1.1 he fill: .space 16 197 1.1 he 198 1.1 he .ascii "NetBSD" 199 1.1 he hd_siz: .long 0 200 1.1 he p0_dsc: .long 0, 0, 0 201 1.1 he p1_dsc: .long 0, 0, 0 202 1.1 he p2_dsc: .long 0, 0, 0 203 1.1 he p3_dsc: .long 0, 0, 0 204 1.1 he bsl_st: .long 0 205 1.1 he bsl_sz: .long 0 206 1.1 he .word 0 207 1.1 he end: 208
Indexes created Tue Oct 07 21:09:53 GMT 2025