forked from KolibriOS/kolibrios
203 lines
5.4 KiB
PHP
203 lines
5.4 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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;**************************************************************************
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;
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; [cache_ide[X]_pointer]
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; or [cache_ide[X]_data_pointer] first entry in cache list
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;
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; +0 - lba sector
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; +4 - state of cache sector
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; 0 = empty
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; 1 = used for read ( same as in hd )
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; 2 = used for write ( differs from hd )
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;
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; [cache_ide[X]_system_data]
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; or [cache_ide[x]_appl_data] - cache entries
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;
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;**************************************************************************
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$Revision$
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align 4
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find_empty_slot_CD_cache:
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;-----------------------------------------------------------
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; find empty or read slot, flush cache if next 10% is used by write
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; output : edi = cache slot
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;-----------------------------------------------------------
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.search_again:
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call cd_calculate_cache_3
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.search_for_empty:
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inc edi
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call cd_calculate_cache_4
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jbe .inside_cache
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mov edi, 1
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.inside_cache:
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call cd_calculate_cache_5
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ret
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;--------------------------------------------------------------------
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clear_CD_cache:
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DEBUGF 1, 'K : clear_CD_cache\n'
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pusha
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mov esi, [cdpos]
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dec esi
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imul esi, sizeof.IDE_CACHE
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add esi, cache_ide0
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xor eax, eax
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mov [esi+IDE_CACHE.search_start], eax
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mov ecx, [esi+IDE_CACHE.system_sad_size]
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mov edi, [esi+IDE_CACHE.pointer]
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call .clear
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mov [esi+IDE_CACHE.appl_search_start], eax
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mov ecx, [esi+IDE_CACHE.appl_sad_size]
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mov edi, [esi+IDE_CACHE.data_pointer]
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call .clear
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popa
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ret
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;--------------------------------------
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.clear:
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shl ecx, 1
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cld
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rep stosd
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ret
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;--------------------------------------------------------------------
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align 4
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cd_calculate_cache:
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; 1 - IDE0 ... 12 - IDE11
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push eax
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mov eax, [cdpos]
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dec eax
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imul eax, sizeof.IDE_CACHE
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add eax, cache_ide0
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cmp [cd_appl_data], 0
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jne @f
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mov ecx, [eax+IDE_CACHE.system_sad_size]
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mov esi, [eax+IDE_CACHE.pointer]
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pop eax
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ret
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;--------------------------------------
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@@:
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mov ecx, [eax+IDE_CACHE.appl_sad_size]
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mov esi, [eax+IDE_CACHE.data_pointer]
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pop eax
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ret
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;--------------------------------------------------------------------
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align 4
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cd_calculate_cache_1:
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; 1 - IDE0 ... 12 - IDE11
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push eax
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mov eax, [cdpos]
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dec eax
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imul eax, sizeof.IDE_CACHE
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add eax, cache_ide0
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cmp [cd_appl_data], 0
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jne @f
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mov esi, [eax+IDE_CACHE.pointer]
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pop eax
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ret
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;--------------------------------------
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@@:
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mov esi, [eax+IDE_CACHE.data_pointer]
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pop eax
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ret
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;--------------------------------------------------------------------
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align 4
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cd_calculate_cache_2:
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; 1 - IDE0 ... 12 - IDE11
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mov eax, [cdpos]
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dec eax
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imul eax, sizeof.IDE_CACHE
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add eax, cache_ide0
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cmp [cd_appl_data], 0
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jne @f
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mov eax, [eax+IDE_CACHE.system_data]
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ret
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;--------------------------------------
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@@:
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mov eax, [eax+IDE_CACHE.appl_data]
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ret
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;--------------------------------------------------------------------
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align 4
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cd_calculate_cache_3:
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; 1 - IDE0 ... 12 - IDE11
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push eax
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mov eax, [cdpos]
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dec eax
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imul eax, sizeof.IDE_CACHE
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add eax, cache_ide0
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cmp [cd_appl_data], 0
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jne @f
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mov edi, [eax+IDE_CACHE.search_start]
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pop eax
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ret
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;--------------------------------------
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@@:
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mov edi, [eax+IDE_CACHE.appl_search_start]
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pop eax
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ret
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;--------------------------------------------------------------------
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align 4
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cd_calculate_cache_4:
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; 1 - IDE0 ... 12 - IDE11
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push eax
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mov eax, [cdpos]
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dec eax
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imul eax, sizeof.IDE_CACHE
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add eax, cache_ide0
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cmp [cd_appl_data], 0
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jne @f
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cmp edi, [eax+IDE_CACHE.system_sad_size]
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pop eax
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ret
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;--------------------------------------
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@@:
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cmp edi, [eax+IDE_CACHE.appl_sad_size]
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pop eax
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ret
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;--------------------------------------------------------------------
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align 4
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cd_calculate_cache_5:
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; 1 - IDE0 ... 12 - IDE11
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push eax
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mov eax, [cdpos]
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dec eax
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imul eax, sizeof.IDE_CACHE
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add eax, cache_ide0
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cmp [cd_appl_data], 0
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jne @f
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mov [eax+IDE_CACHE.search_start], edi
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pop eax
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ret
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;--------------------------------------
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@@:
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mov [eax+IDE_CACHE.appl_search_start], edi
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pop eax
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ret
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;--------------------------------------------------------------------
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