romread.S revision 1.1
1 /* $NetBSD: romread.S,v 1.1 2002/02/24 01:04:25 matt Exp $ */ 2 /* 3 * Copyright (c) 1995 Ludd, University of Lule}, Sweden. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Ludd by 7 * Bertram Barth. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed at Ludd, University of 20 * Lule}, Sweden and its contributors. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* All bugs are subject to removal without further notice */ 37 38 39 40 #include "../include/asm.h" 41 42 /* 43 * read750 (int block, int *regs) 44 */ 45 ENTRY(read750, 0xFFE) 46 movl 8(%ap), %r8 47 movl 4(%r8), %r1 48 movl 8(%r8), %r2 49 movl 12(%r8), %r3 50 movl 24(%r8), %r6 51 clrl %r5 52 movl 4(%ap), %r8 53 pushl $0 54 movl $0, 4(%sp) 55 movl %fp, 0xf0000 # ragge ??? 56 jsb (%r6) 57 movl 0xf0000, %fp 58 ret 59 60 /* 61 * romread_uvax (int lbn, int size, void *buf, struct rpb *rpb) 62 */ 63 ENTRY(romread_uvax, 0xFFE) 64 movl 16(%ap),%r11 # restore boot-contents of %r11 (rpb) 65 movl 52(%r11), %r7 # load iovec/bqo into %r7 66 addl3 (%r7), %r7, %r6 # load qio into %r6 67 pushl %r11 # base of rpb 68 pushl $0 # virtual-flag 69 pushl $33 # read-logical-block 70 pushl 4(%ap) # lbn to start reading 71 pushl 8(%ap) # number of bytes to read 72 pushl 12(%ap) # buffer-address 73 calls $6, (%r6) # call the qio-routine 74 ret # %r0 holds the result 75 76 /* 77 * romwrite_uvax (int lbn, int size, void *buf, struct rpb *rpb) 78 */ 79 ENTRY(romwrite_uvax, 0xFFE) 80 movl 16(%ap), %r11 # restore boot-contents of %r11 (rpb) 81 movl 52(%r11), %r7 # load iovec/bqo into %r7 82 addl3 (%r7), %r7, %r6 # load qio into %r6 83 pushl %r11 # base of rpb 84 pushl $0 # virtual-flag 85 pushl $32 # write-logical-block 86 pushl 4(%ap) # lbn to start reading 87 pushl 8(%ap) # number of bytes to read 88 pushl 12(%ap) # buffer-address 89 calls $6, (%r6) # call the qio-routine 90 ret # %r0 holds the result 91 92
Indexes created Tue Sep 30 11:09:46 GMT 2025