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- | 1 | /* |
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- | 2 | * Copyright (C) 2005 Josef Cejka |
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- | 3 | * All rights reserved. |
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1 | 4 | * |
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- | 5 | * Redistribution and use in source and binary forms, with or without |
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- | 6 | * modification, are permitted provided that the following conditions |
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- | 7 | * are met: |
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- | 8 | * |
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- | 9 | * - Redistributions of source code must retain the above copyright |
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- | 10 | * notice, this list of conditions and the following disclaimer. |
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- | 11 | * - Redistributions in binary form must reproduce the above copyright |
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- | 12 | * notice, this list of conditions and the following disclaimer in the |
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- | 13 | * documentation and/or other materials provided with the distribution. |
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- | 14 | * - The name of the author may not be used to endorse or promote products |
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- | 15 | * derived from this software without specific prior written permission. |
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- | 16 | * |
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- | 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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- | 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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- | 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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- | 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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- | 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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- | 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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- | 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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- | 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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- | 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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- | 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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- | 27 | */ |
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2 | 28 | ||
3 | 29 | ||
4 | #include <arch/boot/memmap.h> |
30 | #include <arch/boot/memmap.h> |
5 | 31 | ||
6 | .global memmap_arch_init |
32 | .global memmap_arch_init |
7 | 33 | ||
8 | .code16 |
34 | .code16 |
9 | .section K_TEXT_START |
35 | .section K_TEXT_START |
10 | 36 | ||
- | 37 | ||
- | 38 | E820_RECORD_SIZE = MEMMAP_E820_RECORD_SIZE |
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- | 39 | E820_MAX_RECORDS = MEMMAP_E820_MAX_RECORDS |
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- | 40 | E820_SMAP = 0x534d4150 |
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- | 41 | ||
- | 42 | .global memmap_arch_init |
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- | 43 | ||
- | 44 | .code16 |
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- | 45 | .section K_TEXT_START |
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- | 46 | ||
11 | memmap_arch_init: |
47 | memmap_arch_init: |
12 | - | ||
13 | ret |
- | |
14 | 48 | ||
- | 49 | e820begin: |
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- | 50 | xorl %ebx,%ebx #at first call must be ebx==0 |
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- | 51 | ||
- | 52 | movw $e820table,%di |
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- | 53 | movb $E820_MAX_RECORDS,(e820counter) |
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- | 54 | e820loop: |
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- | 55 | movl $E820_SMAP,%edx # constrol sequence "SMAP" |
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- | 56 | pushw %ds |
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- | 57 | popw %es # e820 buffer address |
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- | 58 | ||
- | 59 | movl $0xe820,%eax # service |
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- | 60 | movl $E820_RECORD_SIZE,%ecx |
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- | 61 | int $0x15 |
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- | 62 | jc e820end |
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- | 63 | ||
- | 64 | ||
- | 65 | cmpl $E820_SMAP,%eax # verifiing BIOS |
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- | 66 | jne e820end |
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- | 67 | ||
- | 68 | movw %di,%ax # next record |
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- | 69 | addw $E820_RECORD_SIZE,%ax |
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- | 70 | movw %ax,%di |
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- | 71 | ||
- | 72 | decb (e820counter) |
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- | 73 | jnz e820loop |
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- | 74 | ||
- | 75 | e820end: |
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- | 76 | ||
- | 77 | movb (e820counter),%al |
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- | 78 | negb %al |
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- | 79 | addb $32,%al |
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- | 80 | movb %al,(e820counter) # store # of valid entries in e820counter |
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- | 81 | ||
- | 82 | ret |
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- | 83 | ||
- | 84 | ||
- | 85 | e820counter: |
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- | 86 | .byte 0 |
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- | 87 | ||
- | 88 | e820table: |
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- | 89 | .space (32*E820_RECORD_SIZE),0 #prostor na 32 zaznamu delky E820_RECORD_SIZE |
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- | 90 | ||
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