Subversion Repositories Kolibri OS

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;;                                                              ;;

;; Copyright (C) KolibriOS team 2004-2024. All rights reserved. ;;

;; Distributed under terms of the GNU General Public License    ;;

;;                                                              ;;

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;-----------------------------------------------------------------------------

        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     .continue

        mov     eax, 128*1024

;--------------------------------------

.continue:

        push    ecx

        mov     ecx, 12

        mov     esi, cache_ide0+IDE_CACHE.size

        cld

@@:

        mov     [esi], eax

        add     esi, sizeof.IDE_CACHE

        loop    @b

        pop     ecx

        xor     eax, eax

        mov     [hdd_appl_data], 1 ;al

        mov     [cd_appl_data], 1

;--------------------------------------

        test    byte [DRIVE_DATA+1], 0x80

        je      @f

        mov     esi, cache_ide0

        call    get_cache_ide

;--------------------------------------

@@:

        test    byte [DRIVE_DATA+1], 0x20

        je      @f

        mov     esi, cache_ide1

        call    get_cache_ide

;--------------------------------------

@@:

        test    byte [DRIVE_DATA+1], 8

        je      @f

        mov     esi, cache_ide2

        call    get_cache_ide

;--------------------------------------

@@:

        test    byte [DRIVE_DATA+1], 2

        je      @f

        mov     esi, cache_ide3

        call    get_cache_ide

;--------------------------------------

@@:

        test    byte [DRIVE_DATA+6], 0x80

        je      @f

        mov     esi, cache_ide4

        call    get_cache_ide

;--------------------------------------

@@:

        test    byte [DRIVE_DATA+6], 0x20

        je      @f

        mov     esi, cache_ide5

        call    get_cache_ide

;--------------------------------------

@@:

        test    byte [DRIVE_DATA+6], 8

        je      @f

        mov     esi, cache_ide6

        call    get_cache_ide

;--------------------------------------

@@:

        test    byte [DRIVE_DATA+6], 2

        je      @f

        mov     esi, cache_ide7

        call    get_cache_ide

;--------------------------------------

@@:

        test    byte [DRIVE_DATA+11], 0x80

        je      @f

        mov     esi, cache_ide8

        call    get_cache_ide

;--------------------------------------

@@:

        test    byte [DRIVE_DATA+11], 0x20

        je      @f

        mov     esi, cache_ide9

        call    get_cache_ide

;--------------------------------------

@@:

        test    byte [DRIVE_DATA+11], 8

        je      @f

        mov     esi, cache_ide10

        call    get_cache_ide

;--------------------------------------

@@:

        test    byte [DRIVE_DATA+11], 2

        je      end_get_cache

        mov     esi, cache_ide11

        call    get_cache_ide

        jmp     end_get_cache

;-----------------------------------------------------------------------------

get_cache_ide:

        and     [esi+IDE_CACHE.search_start], 0

        and     [esi+IDE_CACHE.appl_search_start], 0

        push    ecx

;        DEBUGF  1, "K : IDE_CACHE.size %x\n", [esi+IDE_CACHE.size]

        stdcall kernel_alloc, [esi+IDE_CACHE.size]

        mov     [esi+IDE_CACHE.pointer], eax

        pop     ecx

        mov     edx, eax

        mov     eax, [esi+IDE_CACHE.size]

        shr     eax, 3

;        DEBUGF  1, "K : IDE_CACHE.system_data_size %x\n", eax

        mov     [esi+IDE_CACHE.system_data_size], eax

        mov     ebx, eax

        imul    eax, 7

;        DEBUGF  1, "K : IDE_CACHE.appl_data_size %x\n", eax

        mov     [esi+IDE_CACHE.appl_data_size], eax

        add     ebx, edx

        mov     [esi+IDE_CACHE.data_pointer], ebx

.cd:

        push    ecx

        mov     eax, [esi+IDE_CACHE.system_data_size]

        call    calculate_for_cd

        add     eax, [esi+IDE_CACHE.pointer]

        mov     [esi+IDE_CACHE.system_data], eax

        mov     [esi+IDE_CACHE.system_sad_size], ecx

        push    edi

        mov     edi, [esi+IDE_CACHE.pointer]

        call    clear_ide_cache

        pop     edi

        mov     eax, [esi+IDE_CACHE.appl_data_size]

        call    calculate_for_cd

        add     eax, [esi+IDE_CACHE.data_pointer]

        mov     [esi+IDE_CACHE.appl_data], eax

        mov     [esi+IDE_CACHE.appl_sad_size], ecx

        push    edi

        mov     edi, [esi+IDE_CACHE.data_pointer]

        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