kolibrios/kernel/branches/Kolibri-acpi/detect/getcache.inc

131 lines
3.9 KiB
PHP
Raw Normal View History

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision$
pusha
mov eax, [pg_data.pages_free]
; 1/32
shr eax, 5
; round off up to 8 pages
shr eax, 3
shl eax, 3
; translate pages in butes *4096
shl eax, 12
; check a upper size of the cache, no more than 1 Mb on the physical device
cmp eax, 1024*1024
jbe @f
mov eax, 1024*1024
jmp .continue
@@:
; check a lower size of the cache, not less than 128 Kb on the physical device
cmp eax, 128*1024
jae @f
mov eax, 128*1024
@@:
.continue:
mov [cache_ide0_size], eax
mov [cache_ide1_size], eax
mov [cache_ide2_size], eax
mov [cache_ide3_size], eax
xor eax, eax
mov [hdd_appl_data], 1;al
mov [cd_appl_data], 1
test byte [DRIVE_DATA+1], 2
je .ide2
mov esi, cache_ide3
call get_cache_ide
.ide2:
test byte [DRIVE_DATA+1], 8
je .ide1
mov esi, cache_ide2
call get_cache_ide
.ide1:
test byte [DRIVE_DATA+1], 0x20
je .ide0
mov esi, cache_ide1
call get_cache_ide
.ide0:
test byte [DRIVE_DATA+1], 0x80
je @f
mov esi, cache_ide0
call get_cache_ide
@@:
jmp end_get_cache
get_cache_ide:
and [esi+cache_ide0_search_start-cache_ide0], 0
and [esi+cache_ide0_appl_search_start-cache_ide0], 0
push ecx
stdcall kernel_alloc, [esi+cache_ide0_size-cache_ide0]
mov [esi+cache_ide0_pointer-cache_ide0], eax
pop ecx
mov edx, eax
mov eax, [esi+cache_ide0_size-cache_ide0]
shr eax, 3
mov [esi+cache_ide0_system_data_size-cache_ide0], eax
mov ebx, eax
imul eax, 7
mov [esi+cache_ide0_appl_data_size-cache_ide0], eax
add ebx, edx
mov [esi+cache_ide0_data_pointer-cache_ide0], ebx
.cd:
push ecx
mov eax, [esi+cache_ide0_system_data_size-cache_ide0]
call calculate_for_cd
add eax, [esi+cache_ide0_pointer-cache_ide0]
mov [esi+cache_ide0_system_data-cache_ide0], eax
mov [esi+cache_ide0_system_sad_size-cache_ide0], ecx
push edi
mov edi, [esi+cache_ide0_pointer-cache_ide0]
call clear_ide_cache
pop edi
mov eax, [esi+cache_ide0_appl_data_size-cache_ide0]
call calculate_for_cd
add eax, [esi+cache_ide0_data_pointer-cache_ide0]
mov [esi+cache_ide0_appl_data-cache_ide0], eax
mov [esi+cache_ide0_appl_sad_size-cache_ide0], ecx
push edi
mov edi, [esi+cache_ide0_data_pointer-cache_ide0]
call clear_ide_cache
pop edi
pop ecx
ret
calculate_for_cd:
push eax
mov ebx, eax
shr eax, 11
shl eax, 3
sub ebx, eax
shr ebx, 11
mov ecx, ebx
shl ebx, 11
pop eax
sub eax, ebx
dec ecx
ret
clear_ide_cache:
push eax
shl ecx, 1
xor eax, eax
cld
rep stosd
pop eax
ret
end_get_cache:
popa