mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-24 23:56:49 +03:00
131 lines
3.9 KiB
PHP
131 lines
3.9 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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pusha
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mov eax, [pg_data.pages_free]
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; 1/32
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shr eax, 5
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; round off up to 8 pages
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shr eax, 3
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shl eax, 3
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; translate pages in butes *4096
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shl eax, 12
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; check a upper size of the cache, no more than 1 Mb on the physical device
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cmp eax, 1024*1024
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jbe @f
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mov eax, 1024*1024
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jmp .continue
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@@:
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; check a lower size of the cache, not less than 128 Kb on the physical device
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cmp eax, 128*1024
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jae @f
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mov eax, 128*1024
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@@:
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.continue:
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mov [cache_ide0_size], eax
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mov [cache_ide1_size], eax
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mov [cache_ide2_size], eax
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mov [cache_ide3_size], eax
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xor eax, eax
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mov [hdd_appl_data], 1;al
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mov [cd_appl_data], 1
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test byte [DRIVE_DATA+1], 2
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je .ide2
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mov esi, cache_ide3
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call get_cache_ide
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.ide2:
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test byte [DRIVE_DATA+1], 8
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je .ide1
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mov esi, cache_ide2
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call get_cache_ide
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.ide1:
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test byte [DRIVE_DATA+1], 0x20
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je .ide0
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mov esi, cache_ide1
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call get_cache_ide
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.ide0:
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test byte [DRIVE_DATA+1], 0x80
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je @f
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mov esi, cache_ide0
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call get_cache_ide
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@@:
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jmp end_get_cache
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get_cache_ide:
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and [esi+cache_ide0_search_start-cache_ide0], 0
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and [esi+cache_ide0_appl_search_start-cache_ide0], 0
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push ecx
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stdcall kernel_alloc, [esi+cache_ide0_size-cache_ide0]
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mov [esi+cache_ide0_pointer-cache_ide0], eax
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pop ecx
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mov edx, eax
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mov eax, [esi+cache_ide0_size-cache_ide0]
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shr eax, 3
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mov [esi+cache_ide0_system_data_size-cache_ide0], eax
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mov ebx, eax
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imul eax, 7
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mov [esi+cache_ide0_appl_data_size-cache_ide0], eax
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add ebx, edx
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mov [esi+cache_ide0_data_pointer-cache_ide0], ebx
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.cd:
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push ecx
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mov eax, [esi+cache_ide0_system_data_size-cache_ide0]
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call calculate_for_cd
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add eax, [esi+cache_ide0_pointer-cache_ide0]
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mov [esi+cache_ide0_system_data-cache_ide0], eax
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mov [esi+cache_ide0_system_sad_size-cache_ide0], ecx
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push edi
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mov edi, [esi+cache_ide0_pointer-cache_ide0]
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call clear_ide_cache
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pop edi
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mov eax, [esi+cache_ide0_appl_data_size-cache_ide0]
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call calculate_for_cd
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add eax, [esi+cache_ide0_data_pointer-cache_ide0]
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mov [esi+cache_ide0_appl_data-cache_ide0], eax
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mov [esi+cache_ide0_appl_sad_size-cache_ide0], ecx
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push edi
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mov edi, [esi+cache_ide0_data_pointer-cache_ide0]
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call clear_ide_cache
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pop edi
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pop ecx
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ret
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calculate_for_cd:
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push eax
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mov ebx, eax
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shr eax, 11
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shl eax, 3
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sub ebx, eax
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shr ebx, 11
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mov ecx, ebx
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shl ebx, 11
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pop eax
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sub eax, ebx
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dec ecx
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ret
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clear_ide_cache:
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push eax
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shl ecx, 1
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xor eax, eax
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cld
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rep stosd
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pop eax
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ret
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end_get_cache:
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popa
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