biosmemx.S revision 1.6
1 1.6 dsl /* $NetBSD: biosmemx.S,v 1.6 2003/11/07 11:34:28 dsl Exp $ */ 2 1.1 drochner 3 1.1 drochner /* 4 1.2 drochner * Copyright (c) 1997, 1999 5 1.1 drochner * Matthias Drochner. All rights reserved. 6 1.1 drochner * 7 1.1 drochner * Redistribution and use in source and binary forms, with or without 8 1.1 drochner * modification, are permitted provided that the following conditions 9 1.1 drochner * are met: 10 1.1 drochner * 1. Redistributions of source code must retain the above copyright 11 1.1 drochner * notice, this list of conditions and the following disclaimer. 12 1.1 drochner * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 drochner * notice, this list of conditions and the following disclaimer in the 14 1.1 drochner * documentation and/or other materials provided with the distribution. 15 1.1 drochner * 3. All advertising materials mentioning features or use of this software 16 1.1 drochner * must display the following acknowledgement: 17 1.1 drochner * This product includes software developed for the NetBSD Project 18 1.1 drochner * by Matthias Drochner. 19 1.1 drochner * 4. The name of the author may not be used to endorse or promote products 20 1.1 drochner * derived from this software without specific prior written permission. 21 1.1 drochner * 22 1.1 drochner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 1.1 drochner * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 1.1 drochner * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 1.1 drochner * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 1.1 drochner * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 1.1 drochner * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 1.1 drochner * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 1.1 drochner * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 1.1 drochner * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 1.1 drochner * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 1.1 drochner * 33 1.1 drochner */ 34 1.1 drochner 35 1.1 drochner #include <machine/asm.h> 36 1.1 drochner 37 1.1 drochner .text 38 1.1 drochner 39 1.1 drochner /* int getextmem2(int buffer[2]) 40 1.1 drochner return: 0=OK, -1=error 41 1.1 drochner buffer[0]: extmem kBytes below 16M (max 15M/1024) 42 1.1 drochner buffer[1]: extmem above 16M, in 64k units 43 1.1 drochner */ 44 1.1 drochner ENTRY(getextmem2) 45 1.1 drochner pushl %ebp 46 1.1 drochner movl %esp,%ebp 47 1.1 drochner pushl %ebx 48 1.1 drochner pushl %ecx 49 1.1 drochner pushl %edx 50 1.1 drochner push %esi 51 1.1 drochner push %edi 52 1.1 drochner 53 1.1 drochner call _C_LABEL(prot_to_real) 54 1.3 dsl .code16 55 1.1 drochner 56 1.3 dsl xorl %ebx, %ebx 57 1.1 drochner movl $0xe801, %eax 58 1.1 drochner int $0x15 59 1.6 dsl pushf 60 1.1 drochner 61 1.6 dsl movw %si, %ax 62 1.6 dsl orw %si, %bx 63 1.6 dsl jz 1f /* if zero use configured values */ 64 1.6 dsl movw %cx, %ax /* k below 16M (max 0x3c00 = 15MB) */ 65 1.6 dsl movw %dx, %bx /* 64k above 16M */ 66 1.6 dsl 1: 67 1.6 dsl popf 68 1.6 dsl setc %bl 69 1.1 drochner 70 1.3 dsl calll _C_LABEL(real_to_prot) 71 1.3 dsl .code32 72 1.1 drochner 73 1.6 dsl movl 8(%ebp), %edi 74 1.6 dsl xorl %eax, %eax 75 1.6 dsl movw %cx, %ax 76 1.6 dsl stosl 77 1.6 dsl movw %dx, %ax 78 1.6 dsl stosl 79 1.6 dsl movb %bl, %al 80 1.6 dsl cbw 81 1.1 drochner 82 1.1 drochner pop %edi 83 1.1 drochner pop %esi 84 1.1 drochner popl %edx 85 1.1 drochner popl %ecx 86 1.1 drochner popl %ebx 87 1.1 drochner popl %ebp 88 1.1 drochner ret 89 1.1 drochner 90 1.2 drochner /* int getmementry(int *iterator, buffer[5]) 91 1.2 drochner return: 0=ok, else error 92 1.1 drochner buffer[0]: start of memory chunk 93 1.1 drochner buffer[2]: length (bytes) 94 1.1 drochner buffer[4]: type 95 1.1 drochner */ 96 1.1 drochner ENTRY(getmementry) 97 1.1 drochner pushl %ebp 98 1.1 drochner movl %esp,%ebp 99 1.1 drochner pushl %ebx 100 1.1 drochner pushl %ecx 101 1.1 drochner pushl %edx 102 1.1 drochner push %esi 103 1.1 drochner push %edi 104 1.1 drochner 105 1.2 drochner movl 8(%ebp), %eax 106 1.6 dsl movl 0(%eax), %ebx /* index */ 107 1.6 dsl movl $20, %ecx /* Buffer size */ 108 1.6 dsl movl $0x534d4150, %edx /* "SMAP" */ 109 1.6 dsl movl 12(%ebp), %edi /* buffer address */ 110 1.1 drochner 111 1.1 drochner call _C_LABEL(prot_to_real) 112 1.3 dsl .code16 113 1.4 dsl 114 1.4 dsl push %di 115 1.4 dsl shrl $4, %edi 116 1.4 dsl mov %ds, %ax 117 1.4 dsl add %di, %ax 118 1.5 dsl mov %ax, %es 119 1.4 dsl pop %di 120 1.6 dsl and $0xf, %di /* buffer addres now in ES:DI */ 121 1.1 drochner 122 1.6 dsl movl $0xe820, %eax /* Some BIOS check EAX value */ 123 1.1 drochner int $0x15 124 1.1 drochner 125 1.2 drochner setc %cl 126 1.1 drochner 127 1.3 dsl calll _C_LABEL(real_to_prot) 128 1.3 dsl .code32 129 1.1 drochner 130 1.2 drochner movl 8(%ebp), %eax 131 1.6 dsl movl %ebx, 0(%eax) /* updated index */ 132 1.2 drochner xorl %eax, %eax 133 1.2 drochner movb %cl, %al 134 1.1 drochner 135 1.1 drochner pop %edi 136 1.1 drochner pop %esi 137 1.1 drochner popl %edx 138 1.1 drochner popl %ecx 139 1.1 drochner popl %ebx 140 1.1 drochner popl %ebp 141 1.1 drochner ret 142
Indexes created Tue Sep 30 07:10:03 GMT 2025