biosmemx.S revision 1.5
1 /* $NetBSD: biosmemx.S,v 1.5 2003/02/14 14:39:24 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 1999 5 * Matthias Drochner. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by Matthias Drochner. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 #include <machine/asm.h> 36 37 .text 38 39 /* int getextmem2(int buffer[2]) 40 return: 0=OK, -1=error 41 buffer[0]: extmem kBytes below 16M (max 15M/1024) 42 buffer[1]: extmem above 16M, in 64k units 43 */ 44 ENTRY(getextmem2) 45 pushl %ebp 46 movl %esp,%ebp 47 pushl %ebx 48 pushl %ecx 49 pushl %edx 50 push %esi 51 push %edi 52 53 call _C_LABEL(prot_to_real) 54 .code16 55 56 xorl %ebx, %ebx 57 movl $0xe801, %eax 58 int $0x15 59 jc err2 60 61 movl $0, %ecx 62 jmp ok2 63 err2: 64 movl $-1, %ecx 65 ok2: 66 movl %eax, %edx 67 68 calll _C_LABEL(real_to_prot) 69 .code32 70 71 movl 8(%ebp), %eax 72 movl %edx, (%eax) 73 movl %ebx, 4(%eax) 74 75 movl %ecx, %eax 76 77 pop %edi 78 pop %esi 79 popl %edx 80 popl %ecx 81 popl %ebx 82 popl %ebp 83 ret 84 85 /* int getmementry(int *iterator, buffer[5]) 86 return: 0=ok, else error 87 buffer[0]: start of memory chunk 88 buffer[2]: length (bytes) 89 buffer[4]: type 90 */ 91 ENTRY(getmementry) 92 pushl %ebp 93 movl %esp,%ebp 94 pushl %ebx 95 pushl %ecx 96 pushl %edx 97 push %esi 98 push %edi 99 100 movl 8(%ebp), %eax 101 movl 0(%eax), %ebx 102 movl $20, %ecx 103 movl $0x534d4150, %edx # "SMAP" 104 movl 12(%ebp), %edi 105 106 call _C_LABEL(prot_to_real) 107 .code16 108 109 push %di 110 shrl $4, %edi 111 mov %ds, %ax 112 add %di, %ax 113 mov %ax, %es 114 pop %di 115 and $0xf, %di 116 117 movw $0xe820, %ax 118 int $0x15 119 120 setc %cl 121 122 calll _C_LABEL(real_to_prot) 123 .code32 124 125 movl 8(%ebp), %eax 126 movl %ebx, 0(%eax) 127 xorl %eax, %eax 128 movb %cl, %al 129 130 pop %edi 131 pop %esi 132 popl %edx 133 popl %ecx 134 popl %ebx 135 popl %ebp 136 ret 137
Indexes created Tue Sep 30 07:10:03 GMT 2025