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2288 clevermous 1 
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;                                                              ;;
2455 mario79 3 
;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
2288 clevermous 4 
;; Distributed under terms of the GNU General Public License    ;;
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;;                                                              ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 3742 $
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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
3742 clevermous 39 
 
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        test    byte [DRIVE_DATA+1], 2
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        je      .ide2
2288 clevermous 42 
        mov     esi, cache_ide3
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        call    get_cache_ide
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.ide2:
3742 clevermous 45 
        test    byte [DRIVE_DATA+1], 8
2288 clevermous 46 
        je      .ide1
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        mov     esi, cache_ide2
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        call    get_cache_ide
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.ide1:
3742 clevermous 50 
        test    byte [DRIVE_DATA+1], 0x20
2288 clevermous 51 
        je      .ide0
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        mov     esi, cache_ide1
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        call    get_cache_ide
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.ide0:
3742 clevermous 55 
        test    byte [DRIVE_DATA+1], 0x80
2288 clevermous 56 
        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