| 1,6 → 1,32 |
|---|
| /* |
| * Copyright (C) 2005 Josef Cejka |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| |
| |
| #include <arch/boot/memmap.h> |
| |
| .global memmap_arch_init |
| 8,6 → 34,56 |
|---|
| .code16 |
| .section K_TEXT_START |
| |
| |
| E820_RECORD_SIZE = MEMMAP_E820_RECORD_SIZE |
| E820_MAX_RECORDS = MEMMAP_E820_MAX_RECORDS |
| E820_SMAP = 0x534d4150 |
| |
| .global memmap_arch_init |
| |
| .code16 |
| .section K_TEXT_START |
| |
| memmap_arch_init: |
| |
| ret |
| |
| e820begin: |
| xorl %ebx,%ebx #at first call must be ebx==0 |
| |
| movw $e820table,%di |
| movb $E820_MAX_RECORDS,(e820counter) |
| e820loop: |
| movl $E820_SMAP,%edx # constrol sequence "SMAP" |
| pushw %ds |
| popw %es # e820 buffer address |
| |
| movl $0xe820,%eax # service |
| movl $E820_RECORD_SIZE,%ecx |
| int $0x15 |
| jc e820end |
| |
| |
| cmpl $E820_SMAP,%eax # verifiing BIOS |
| jne e820end |
| |
| movw %di,%ax # next record |
| addw $E820_RECORD_SIZE,%ax |
| movw %ax,%di |
| |
| decb (e820counter) |
| jnz e820loop |
| |
| e820end: |
| |
| movb (e820counter),%al |
| negb %al |
| addb $32,%al |
| movb %al,(e820counter) # store # of valid entries in e820counter |
| |
| ret |
| |
| |
| e820counter: |
| .byte 0 |
| |
| e820table: |
| .space (32*E820_RECORD_SIZE),0 #prostor na 32 zaznamu delky E820_RECORD_SIZE |