biosmemx.S revision 1.4
1 /* $NetBSD: biosmemx.S,v 1.4 2003/02/05 21:48:53 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 #define data32 .byte 0x66 38 39 .text 40 41 /* int getextmem2(int buffer[2]) 42 return: 0=OK, -1=error 43 buffer[0]: extmem kBytes below 16M (max 15M/1024) 44 buffer[1]: extmem above 16M, in 64k units 45 */ 46 ENTRY(getextmem2) 47 pushl %ebp 48 movl %esp,%ebp 49 pushl %ebx 50 pushl %ecx 51 pushl %edx 52 push %esi 53 push %edi 54 55 call _C_LABEL(prot_to_real) 56 .code16 57 58 xorl %ebx, %ebx 59 movl $0xe801, %eax 60 int $0x15 61 jc err2 62 63 movl $0, %ecx 64 jmp ok2 65 err2: 66 movl $-1, %ecx 67 ok2: 68 movl %eax, %edx 69 70 calll _C_LABEL(real_to_prot) 71 .code32 72 73 movl 8(%ebp), %eax 74 movl %edx, (%eax) 75 movl %ebx, 4(%eax) 76 77 movl %ecx, %eax 78 79 pop %edi 80 pop %esi 81 popl %edx 82 popl %ecx 83 popl %ebx 84 popl %ebp 85 ret 86 87 /* int getmementry(int *iterator, buffer[5]) 88 return: 0=ok, else error 89 buffer[0]: start of memory chunk 90 buffer[2]: length (bytes) 91 buffer[4]: type 92 */ 93 ENTRY(getmementry) 94 pushl %ebp 95 movl %esp,%ebp 96 pushl %ebx 97 pushl %ecx 98 pushl %edx 99 push %esi 100 push %edi 101 102 movl 8(%ebp), %eax 103 movl 0(%eax), %ebx 104 movl $20, %ecx 105 movl $0x534d4150, %edx # "SMAP" 106 movl 12(%ebp), %edi 107 108 call _C_LABEL(prot_to_real) 109 .code16 110 111 push %di 112 shrl $4, %edi 113 mov %ds, %ax 114 add %di, %ax 115 mov %ax, %ds 116 pop %di 117 and $0xf, %di 118 119 movw $0xe820, %ax 120 int $0x15 121 122 setc %cl 123 124 calll _C_LABEL(real_to_prot) 125 .code32 126 127 movl 8(%ebp), %eax 128 movl %ebx, 0(%eax) 129 xorl %eax, %eax 130 movb %cl, %al 131 132 pop %edi 133 pop %esi 134 popl %edx 135 popl %ecx 136 popl %ebx 137 popl %ebp 138 ret 139
Indexes created Tue Sep 30 11:09:46 GMT 2025