kolibrios-fun/kernel/branches/net/blkdev/ide_cache.inc

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                                                              ;;
;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License    ;;
;;                                                              ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;**************************************************************************
;
;   [cache_ide[X]_pointer]
;   or [cache_ide[X]_data_pointer]  first entry in cache list
;
;            +0   - lba sector
;            +4   - state of cache sector
;                   0 = empty
;                   1 = used for read  ( same as in hd )
;                   2 = used for write ( differs from hd )
;
;  [cache_ide[X]_system_data]
;  or [cache_ide[x]_appl_data] - cache entries
;
;**************************************************************************

$Revision $


align 4
write_cache:
;-----------------------------------------------------------
; write all changed sectors to disk
;-----------------------------------------------------------
        push    eax ecx edx esi edi

    ; write difference ( 2 ) from cache to hd
        call    calculate_cache
        add     esi, 8
        mov     edi, 1
write_cache_more:
        cmp     dword [esi+4], 2; if cache slot is not different
        jne     .write_chain
        mov     dword [esi+4], 1; same as in hd
        mov     eax, [esi]      ; eax = sector to write
        cmp     eax, [PARTITION_START]
        jb      danger
        cmp     eax, [PARTITION_END]
        ja      danger
        cmp     [hdpos], 0x80
        jae     @f
; DMA write is permitted only if [allow_dma_access]=1
        cmp     [allow_dma_access], 2
        jae     .nodma
        cmp     [dma_hdd], 1
        jnz     .nodma
@@:
; <EFBFBD><EFBFBD>ꥤ<EFBFBD><EFBFBD>塞 <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 楯<EFBFBD>窨 <EFBFBD><EFBFBD>᫥<EFBFBD><EFBFBD><EFBFBD><EFBFBD>⥫<EFBFBD><EFBFBD><EFBFBD><EFBFBD> ᥪ<EFBFBD><EFBFBD>஢ <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>饭<EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        cmp     ecx, 1
        jz      .nonext
        cmp     dword [esi+8+4], 2
        jnz     .nonext
        push    eax
        inc     eax
        cmp     eax, [esi+8]
        pop     eax
        jnz     .nonext
        cmp     [cache_chain_started], 1
        jz      @f
        mov     [cache_chain_started], 1
        mov     [cache_chain_size], 0
        mov     [cache_chain_pos], edi
        mov     [cache_chain_ptr], esi
@@:
        inc     [cache_chain_size]
        cmp     [cache_chain_size], 16
        jnz     .continue
        jmp     .write_chain
.nonext:
        call    flush_cache_chain
        mov     [cache_chain_size], 1
        mov     [cache_chain_ptr], esi
        call    write_cache_sector
        jmp     .continue
.nodma:
        call    cache_write_pio
.write_chain:
        call    flush_cache_chain
.continue:
danger:
        add     esi, 8
        inc     edi
        dec     ecx
        jnz     write_cache_more
        call    flush_cache_chain
 return_02:
        pop     edi esi edx ecx eax
        ret

flush_cache_chain:
        cmp     [cache_chain_started], 0
        jz      @f
        call    write_cache_chain
        mov     [cache_chain_started], 0
@@:
        ret
;--------------------------------------------------------------------
align 4
find_empty_slot:
;-----------------------------------------------------------
; find empty or read slot, flush cache if next 10% is used by write
; output : edi = cache slot
;-----------------------------------------------------------
;    push  ecx esi

search_again:
        call    calculate_cache_3
        shr     ecx, 3
search_for_empty:
        inc     edi
        call    calculate_cache_4
        jbe     inside_cache
        mov     edi, 1
inside_cache:
        push    esi
        call    calculate_cache_1
        cmp     dword [edi*8+esi+4], 2
        pop     esi
        jb      found_slot              ; it's empty or read
        dec     ecx
        jnz     search_for_empty
        call    write_cache             ; no empty slots found, write all
        cmp     [hd_error], 0
        jne     found_slot_access_denied
        jmp     search_again            ; and start again
found_slot:
        call    calculate_cache_5
found_slot_access_denied:
        ret
;--------------------------------------------------------------------
align 4
clear_hd_cache:
        ret
;--------------------------------------------------------------------
align 4
calculate_cache:
;    mov   ecx,cache_max         ; entries in cache
;    mov   esi,HD_CACHE+8

; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [hdpos], 1
        jne     .ide1
        cmp     [hdd_appl_data], 0
        jne     .ide0_appl_data
        mov     ecx, [cache_ide0_system_sad_size]
        mov     esi, [cache_ide0_pointer]
        ret
.ide0_appl_data:
        mov     ecx, [cache_ide0_appl_sad_size]
        mov     esi, [cache_ide0_data_pointer]
        ret
.ide1:
        cmp     [hdpos], 2
        jne     .ide2
        cmp     [hdd_appl_data], 0
        jne     .ide1_appl_data
        mov     ecx, [cache_ide1_system_sad_size]
        mov     esi, [cache_ide1_pointer]
        ret
.ide1_appl_data:
        mov     ecx, [cache_ide1_appl_sad_size]
        mov     esi, [cache_ide1_data_pointer]
        ret
.ide2:
        cmp     [hdpos], 3
        jne     .ide3
        cmp     [hdd_appl_data], 0
        jne     .ide2_appl_data
        mov     ecx, [cache_ide2_system_sad_size]
        mov     esi, [cache_ide2_pointer]
        ret
.ide2_appl_data:
        mov     ecx, [cache_ide2_appl_sad_size]
        mov     esi, [cache_ide2_data_pointer]
        ret
.ide3:
        cmp     [hdpos], 4
        jne     .noide
        cmp     [hdd_appl_data], 0
        jne     .ide3_appl_data
        mov     ecx, [cache_ide3_system_sad_size]
        mov     esi, [cache_ide3_pointer]
        ret
.ide3_appl_data:
        mov     ecx, [cache_ide3_appl_sad_size]
        mov     esi, [cache_ide3_data_pointer]
        ret
.noide:
        push    eax
        mov     eax, [hdpos]
        sub     eax, 80h
        cmp     byte [BiosDisksData+eax*4+2], -1
        jz      @f
        movzx   eax, byte [BiosDisksData+eax*4+2]
        imul    eax, cache_ide1-cache_ide0
        add     eax, cache_ide0
        jmp     .get
@@:
        imul    eax, cache_ide1-cache_ide0
        add     eax, BiosDiskCaches
.get:
        cmp     [hdd_appl_data], 0
        jne     .bd_appl_data
        mov     ecx, [cache_ide0_system_sad_size-cache_ide0+eax]
        mov     esi, [cache_ide0_pointer-cache_ide0+eax]
        pop     eax
        ret
.bd_appl_data:
        mov     ecx, [cache_ide0_appl_sad_size-cache_ide0+eax]
        mov     esi, [cache_ide0_data_pointer-cache_ide0+eax]
        pop     eax
        ret
;--------------------------------------------------------------------
align 4
calculate_cache_1:
;    lea   esi,[edi*8+HD_CACHE]
; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [hdpos], 1
        jne     .ide1
        cmp     [hdd_appl_data], 0
        jne     .ide0_appl_data
        mov     esi, [cache_ide0_pointer]
        ret
.ide0_appl_data:
        mov     esi, [cache_ide0_data_pointer]
        ret
.ide1:
        cmp     [hdpos], 2
        jne     .ide2
        cmp     [hdd_appl_data], 0
        jne     .ide1_appl_data
        mov     esi, [cache_ide1_pointer]
        ret
.ide1_appl_data:
        mov     esi, [cache_ide1_data_pointer]
        ret
.ide2:
        cmp     [hdpos], 3
        jne     .ide3
        cmp     [hdd_appl_data], 0
        jne     .ide2_appl_data
        mov     esi, [cache_ide2_pointer]
        ret
.ide2_appl_data:
        mov     esi, [cache_ide2_data_pointer]
        ret
.ide3:
        cmp     [hdpos], 4
        jne     .noide
        cmp     [hdd_appl_data], 0
        jne     .ide3_appl_data
        mov     esi, [cache_ide3_pointer]
        ret
.ide3_appl_data:
        mov     esi, [cache_ide3_data_pointer]
        ret
.noide:
        push    eax
        mov     eax, [hdpos]
        sub     eax, 80h
        cmp     byte [BiosDisksData+eax*4+2], -1
        jz      @f
        movzx   eax, byte [BiosDisksData+eax*4+2]
        imul    eax, cache_ide1-cache_ide0
        add     eax, cache_ide0
        jmp     .get
@@:
        imul    eax, cache_ide1-cache_ide0
        add     eax, BiosDiskCaches
.get:
        cmp     [hdd_appl_data], 0
        jne     .bd_appl_data
        mov     esi, [cache_ide0_pointer-cache_ide0+eax]
        pop     eax
        ret
.bd_appl_data:
        mov     esi, [cache_ide0_data_pointer-cache_ide0+eax]
        pop     eax
        ret

;--------------------------------------------------------------------
align 4
calculate_cache_2:
;    add   esi,HD_CACHE+65536
; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [hdpos], 1
        jne     .ide1
        cmp     [hdd_appl_data], 0
        jne     .ide0_appl_data
        mov     eax, [cache_ide0_system_data]
        ret
.ide0_appl_data:
        mov     eax, [cache_ide0_appl_data]
        ret
.ide1:
        cmp     [hdpos], 2
        jne     .ide2
        cmp     [hdd_appl_data], 0
        jne     .ide1_appl_data
        mov     eax, [cache_ide1_system_data]
        ret
.ide1_appl_data:
        mov     eax, [cache_ide1_appl_data]
        ret
.ide2:
        cmp     [hdpos], 3
        jne     .ide3
        cmp     [hdd_appl_data], 0
        jne     .ide2_appl_data
        mov     eax, [cache_ide2_system_data]
        ret
.ide2_appl_data:
        mov     eax, [cache_ide2_appl_data]
        ret
.ide3:
        cmp     [hdpos], 4
        jne     .noide
        cmp     [hdd_appl_data], 0
        jne     .ide3_appl_data
        mov     eax, [cache_ide3_system_data]
        ret
.ide3_appl_data:
        mov     eax, [cache_ide3_appl_data]
        ret
.noide:
        mov     eax, [hdpos]
        sub     eax, 80h
        cmp     byte [BiosDisksData+eax*4+2], -1
        jz      @f
        movzx   eax, byte [BiosDisksData+eax*4+2]
        imul    eax, cache_ide1-cache_ide0
        add     eax, cache_ide0
        jmp     .get
@@:
        imul    eax, cache_ide1-cache_ide0
        add     eax, BiosDiskCaches
.get:
        cmp     [hdd_appl_data], 0
        jne     .bd_appl_data
        mov     eax, [cache_ide0_system_data-cache_ide0+eax]
        ret
.bd_appl_data:
        mov     eax, [cache_ide0_appl_data-cache_ide0+eax]
        ret
;--------------------------------------------------------------------
align 4
calculate_cache_3:
;    mov   ecx,cache_max*10/100
;    mov   edi,[cache_search_start]

; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [hdpos], 1
        jne     .ide1
        cmp     [hdd_appl_data], 0
        jne     .ide0_appl_data
        mov     ecx, [cache_ide0_system_sad_size]
        mov     edi, [cache_ide0_search_start]
        ret
.ide0_appl_data:
        mov     ecx, [cache_ide0_appl_sad_size]
        mov     edi, [cache_ide0_appl_search_start]
        ret
.ide1:
        cmp     [hdpos], 2
        jne     .ide2
        cmp     [hdd_appl_data], 0
        jne     .ide1_appl_data
        mov     ecx, [cache_ide1_system_sad_size]
        mov     edi, [cache_ide1_search_start]
        ret
.ide1_appl_data:
        mov     ecx, [cache_ide1_appl_sad_size]
        mov     edi, [cache_ide1_appl_search_start]
        ret
.ide2:
        cmp     [hdpos], 3
        jne     .ide3
        cmp     [hdd_appl_data], 0
        jne     .ide2_appl_data
        mov     ecx, [cache_ide2_system_sad_size]
        mov     edi, [cache_ide2_search_start]
        ret
.ide2_appl_data:
        mov     ecx, [cache_ide2_appl_sad_size]
        mov     edi, [cache_ide2_appl_search_start]
        ret
.ide3:
        cmp     [hdpos], 4
        jne     .noide
        cmp     [hdd_appl_data], 0
        jne     .ide3_appl_data
        mov     ecx, [cache_ide3_system_sad_size]
        mov     edi, [cache_ide3_search_start]
        ret
.ide3_appl_data:
        mov     ecx, [cache_ide3_appl_sad_size]
        mov     edi, [cache_ide3_appl_search_start]
        ret
.noide:
        push    eax
        mov     eax, [hdpos]
        sub     eax, 80h
        cmp     byte [BiosDisksData+eax*4+2], -1
        jz      @f
        movzx   eax, byte [BiosDisksData+eax*4+2]
        imul    eax, cache_ide1-cache_ide0
        add     eax, cache_ide0
        jmp     .get
@@:
        imul    eax, cache_ide1-cache_ide0
        add     eax, BiosDiskCaches
.get:
        cmp     [hdd_appl_data], 0
        jne     .bd_appl_data
        mov     ecx, [cache_ide0_system_sad_size-cache_ide0+eax]
        mov     edi, [cache_ide0_search_start-cache_ide0+eax]
        pop     eax
        ret
.bd_appl_data:
        mov     ecx, [cache_ide0_appl_sad_size-cache_ide0+eax]
        mov     edi, [cache_ide0_appl_search_start-cache_ide0+eax]
        pop     eax
        ret
;--------------------------------------------------------------------
align 4
calculate_cache_4:
;    cmp   edi,cache_max
; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [hdpos], 1
        jne     .ide1
        cmp     [hdd_appl_data], 0
        jne     .ide0_appl_data
        cmp     edi, [cache_ide0_system_sad_size]
        ret
.ide0_appl_data:
        cmp     edi, [cache_ide0_appl_sad_size]
        ret
.ide1:
        cmp     [hdpos], 2
        jne     .ide2
        cmp     [hdd_appl_data], 0
        jne     .ide1_appl_data
        cmp     edi, [cache_ide1_system_sad_size]
        ret
.ide1_appl_data:
        cmp     edi, [cache_ide1_appl_sad_size]
        ret
.ide2:
        cmp     [hdpos], 3
        jne     .ide3
        cmp     [hdd_appl_data], 0
        jne     .ide2_appl_data
        cmp     edi, [cache_ide2_system_sad_size]
        ret
.ide2_appl_data:
        cmp     edi, [cache_ide2_appl_sad_size]
        ret
.ide3:
        cmp     [hdpos], 4
        jne     .noide
        cmp     [hdd_appl_data], 0
        jne     .ide3_appl_data
        cmp     edi, [cache_ide3_system_sad_size]
        ret
.ide3_appl_data:
        cmp     edi, [cache_ide3_appl_sad_size]
        ret
.noide:
        push    eax
        mov     eax, [hdpos]
        sub     eax, 80h
        cmp     byte [BiosDisksData+eax*4+2], -1
        jz      @f
        movzx   eax, byte [BiosDisksData+eax*4+2]
        imul    eax, cache_ide1-cache_ide0
        add     eax, cache_ide0
        jmp     .get
@@:
        imul    eax, cache_ide1-cache_ide0
        add     eax, BiosDiskCaches
.get:
        cmp     [hdd_appl_data], 0
        jne     .bd_appl_data
        cmp     edi, [cache_ide0_system_sad_size-cache_ide0+eax]
        pop     eax
        ret
.bd_appl_data:
        cmp     edi, [cache_ide0_appl_sad_size-cache_ide0+eax]
        pop     eax
        ret

;--------------------------------------------------------------------
align 4
calculate_cache_5:
;    mov   [cache_search_start],edi
; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [hdpos], 1
        jne     .ide1
        cmp     [hdd_appl_data], 0
        jne     .ide0_appl_data
        mov     [cache_ide0_search_start], edi
        ret
.ide0_appl_data:
        mov     [cache_ide0_appl_search_start], edi
        ret
.ide1:
        cmp     [hdpos], 2
        jne     .ide2
        cmp     [hdd_appl_data], 0
        jne     .ide1_appl_data
        mov     [cache_ide1_search_start], edi
        ret
.ide1_appl_data:
        mov     [cache_ide1_appl_search_start], edi
        ret
.ide2:
        cmp     [hdpos], 3
        jne     .ide3
        cmp     [hdd_appl_data], 0
        jne     .ide2_appl_data
        mov     [cache_ide2_search_start], edi
        ret
.ide2_appl_data:
        mov     [cache_ide2_appl_search_start], edi
        ret
.ide3:
        cmp     [hdpos], 4
        jne     .noide
        cmp     [hdd_appl_data], 0
        jne     .ide3_appl_data
        mov     [cache_ide3_search_start], edi
        ret
.ide3_appl_data:
        mov     [cache_ide3_appl_search_start], edi
        ret
.noide:
        push    eax
        mov     eax, [hdpos]
        sub     eax, 80h
        cmp     byte [BiosDisksData+eax*4+2], -1
        jz      @f
        movzx   eax, byte [BiosDisksData+eax*4+2]
        imul    eax, cache_ide1-cache_ide0
        add     eax, cache_ide0
        jmp     .get
@@:
        imul    eax, cache_ide1-cache_ide0
        add     eax, BiosDiskCaches
.get:
        cmp     [hdd_appl_data], 0
        jne     .bd_appl_data
        mov     [cache_ide0_search_start-cache_ide0+eax], edi
        pop     eax
        ret
.bd_appl_data:
        mov     [cache_ide0_appl_search_start-cache_ide0+eax], edi
        pop     eax
        ret

;--------------------------------------------------------------------
align 4
find_empty_slot_CD_cache:
;-----------------------------------------------------------
; find empty or read slot, flush cache if next 10% is used by write
; output : edi = cache slot
;-----------------------------------------------------------
.search_again:
        call    cd_calculate_cache_3
.search_for_empty:
        inc     edi
        call    cd_calculate_cache_4
        jbe     .inside_cache
        mov     edi, 1
.inside_cache:
        call    cd_calculate_cache_5
        ret
;--------------------------------------------------------------------
clear_CD_cache:
        pusha
.ide0:
        xor     eax, eax
        cmp     [cdpos], 1
        jne     .ide1
        mov     [cache_ide0_search_start], eax
        mov     ecx, [cache_ide0_system_sad_size]
        mov     edi, [cache_ide0_pointer]
        call    .clear
        mov     [cache_ide0_appl_search_start], eax
        mov     ecx, [cache_ide0_appl_sad_size]
        mov     edi, [cache_ide0_data_pointer]
        jmp     .continue
.ide1:
        cmp     [cdpos], 2
        jne     .ide2
        mov     [cache_ide1_search_start], eax
        mov     ecx, [cache_ide1_system_sad_size]
        mov     edi, [cache_ide1_pointer]
        call    .clear
        mov     [cache_ide1_appl_search_start], eax
        mov     ecx, [cache_ide1_appl_sad_size]
        mov     edi, [cache_ide1_data_pointer]
        jmp     .continue
.ide2:
        cmp     [cdpos], 3
        jne     .ide3
        mov     [cache_ide2_search_start], eax
        mov     ecx, [cache_ide2_system_sad_size]
        mov     edi, [cache_ide2_pointer]
        call    .clear
        mov     [cache_ide2_appl_search_start], eax
        mov     ecx, [cache_ide2_appl_sad_size]
        mov     edi, [cache_ide2_data_pointer]
        jmp     .continue
.ide3:
        mov     [cache_ide3_search_start], eax
        mov     ecx, [cache_ide3_system_sad_size]
        mov     edi, [cache_ide3_pointer]
        call    .clear
        mov     [cache_ide3_appl_search_start], eax
        mov     ecx, [cache_ide3_appl_sad_size]
        mov     edi, [cache_ide3_data_pointer]
.continue:
        call    .clear
        popa
        ret
.clear:
        shl     ecx, 1
        cld
        rep stosd
        ret
;--------------------------------------------------------------------
align 4
cd_calculate_cache:
;    mov   ecx,cache_max         ; entries in cache
;    mov   esi,HD_CACHE+8

; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [cdpos], 1
        jne     .ide1
        cmp     [cd_appl_data], 0
        jne     .ide0_appl_data
        mov     ecx, [cache_ide0_system_sad_size]
        mov     esi, [cache_ide0_pointer]
        ret
.ide0_appl_data:
        mov     ecx, [cache_ide0_appl_sad_size]
        mov     esi, [cache_ide0_data_pointer]
        ret
.ide1:
        cmp     [cdpos], 2
        jne     .ide2
        cmp     [cd_appl_data], 0
        jne     .ide1_appl_data
        mov     ecx, [cache_ide1_system_sad_size]
        mov     esi, [cache_ide1_pointer]
        ret
.ide1_appl_data:
        mov     ecx, [cache_ide1_appl_sad_size]
        mov     esi, [cache_ide1_data_pointer]
        ret
.ide2:
        cmp     [cdpos], 3
        jne     .ide3
        cmp     [cd_appl_data], 0
        jne     .ide2_appl_data
        mov     ecx, [cache_ide2_system_sad_size]
        mov     esi, [cache_ide2_pointer]
        ret
.ide2_appl_data:
        mov     ecx, [cache_ide2_appl_sad_size]
        mov     esi, [cache_ide2_data_pointer]
        ret
.ide3:
        cmp     [cd_appl_data], 0
        jne     .ide3_appl_data
        mov     ecx, [cache_ide3_system_sad_size]
        mov     esi, [cache_ide3_pointer]
        ret
.ide3_appl_data:
        mov     ecx, [cache_ide3_appl_sad_size]
        mov     esi, [cache_ide3_data_pointer]
        ret
;--------------------------------------------------------------------
align 4
cd_calculate_cache_1:
;    lea   esi,[edi*8+HD_CACHE]
; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [cdpos], 1
        jne     .ide1
        cmp     [cd_appl_data], 0
        jne     .ide0_appl_data
        mov     esi, [cache_ide0_pointer]
        ret
.ide0_appl_data:
        mov     esi, [cache_ide0_data_pointer]
        ret
.ide1:
        cmp     [cdpos], 2
        jne     .ide2
        cmp     [cd_appl_data], 0
        jne     .ide1_appl_data
        mov     esi, [cache_ide1_pointer]
        ret
.ide1_appl_data:
        mov     esi, [cache_ide1_data_pointer]
        ret
.ide2:
        cmp     [cdpos], 3
        jne     .ide3
        cmp     [cd_appl_data], 0
        jne     .ide2_appl_data
        mov     esi, [cache_ide2_pointer]
        ret
.ide2_appl_data:
        mov     esi, [cache_ide2_data_pointer]
        ret
.ide3:
        cmp     [cd_appl_data], 0
        jne     .ide3_appl_data
        mov     esi, [cache_ide3_pointer]
        ret
.ide3_appl_data:
        mov     esi, [cache_ide3_data_pointer]
        ret
;--------------------------------------------------------------------
align 4
cd_calculate_cache_2:
;    add   esi,HD_CACHE+65536
; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [cdpos], 1
        jne     .ide1
        cmp     [cd_appl_data], 0
        jne     .ide0_appl_data
        mov     eax, [cache_ide0_system_data]
        ret
.ide0_appl_data:
        mov     eax, [cache_ide0_appl_data]
        ret
.ide1:
        cmp     [cdpos], 2
        jne     .ide2
        cmp     [cd_appl_data], 0
        jne     .ide1_appl_data
        mov     eax, [cache_ide1_system_data]
        ret
.ide1_appl_data:
        mov     eax, [cache_ide1_appl_data]
        ret
.ide2:
        cmp     [cdpos], 3
        jne     .ide3
        cmp     [cd_appl_data], 0
        jne     .ide2_appl_data
        mov     eax, [cache_ide2_system_data]
        ret
.ide2_appl_data:
        mov     eax, [cache_ide2_appl_data]
        ret
.ide3:
        cmp     [cd_appl_data], 0
        jne     .ide3_appl_data
        mov     eax, [cache_ide3_system_data]
        ret
.ide3_appl_data:
        mov     eax, [cache_ide3_appl_data]
        ret
;--------------------------------------------------------------------
align 4
cd_calculate_cache_3:
;    mov   ecx,cache_max*10/100
;    mov   edi,[cache_search_start]

; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [cdpos], 1
        jne     .ide1
        cmp     [cd_appl_data], 0
        jne     .ide0_appl_data
        mov     edi, [cache_ide0_search_start]
        ret
.ide0_appl_data:
        mov     edi, [cache_ide0_appl_search_start]
        ret
.ide1:
        cmp     [cdpos], 2
        jne     .ide2
        cmp     [cd_appl_data], 0
        jne     .ide1_appl_data
        mov     edi, [cache_ide1_search_start]
        ret
.ide1_appl_data:
        mov     edi, [cache_ide1_appl_search_start]
        ret
.ide2:
        cmp     [cdpos], 3
        jne     .ide3
        cmp     [cd_appl_data], 0
        jne     .ide2_appl_data
        mov     edi, [cache_ide2_search_start]
        ret
.ide2_appl_data:
        mov     edi, [cache_ide2_appl_search_start]
        ret
.ide3:
        cmp     [cd_appl_data], 0
        jne     .ide3_appl_data
        mov     edi, [cache_ide3_search_start]
        ret
.ide3_appl_data:
        mov     edi, [cache_ide3_appl_search_start]
        ret
;--------------------------------------------------------------------
align 4
cd_calculate_cache_4:
;    cmp   edi,cache_max
; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [cdpos], 1
        jne     .ide1
        cmp     [cd_appl_data], 0
        jne     .ide0_appl_data
        cmp     edi, [cache_ide0_system_sad_size]
        ret
.ide0_appl_data:
        cmp     edi, [cache_ide0_appl_sad_size]
        ret
.ide1:
        cmp     [cdpos], 2
        jne     .ide2
        cmp     [cd_appl_data], 0
        jne     .ide1_appl_data
        cmp     edi, [cache_ide1_system_sad_size]
        ret
.ide1_appl_data:
        cmp     edi, [cache_ide1_appl_sad_size]
        ret
.ide2:
        cmp     [cdpos], 3
        jne     .ide3
        cmp     [cd_appl_data], 0
        jne     .ide2_appl_data
        cmp     edi, [cache_ide2_system_sad_size]
        ret
.ide2_appl_data:
        cmp     edi, [cache_ide2_appl_sad_size]
        ret
.ide3:
        cmp     [cd_appl_data], 0
        jne     .ide3_appl_data
        cmp     edi, [cache_ide3_system_sad_size]
        ret
.ide3_appl_data:
        cmp     edi, [cache_ide3_appl_sad_size]
        ret
;--------------------------------------------------------------------
align 4
cd_calculate_cache_5:
;    mov   [cache_search_start],edi
; 1 - IDE0 ... 4 - IDE3
.ide0:
        cmp     [cdpos], 1
        jne     .ide1
        cmp     [cd_appl_data], 0
        jne     .ide0_appl_data
        mov     [cache_ide0_search_start], edi
        ret
.ide0_appl_data:
        mov     [cache_ide0_appl_search_start], edi
        ret
.ide1:
        cmp     [cdpos], 2
        jne     .ide2
        cmp     [cd_appl_data], 0
        jne     .ide1_appl_data
        mov     [cache_ide1_search_start], edi
        ret
.ide1_appl_data:
        mov     [cache_ide1_appl_search_start], edi
        ret
.ide2:
        cmp     [cdpos], 3
        jne     .ide3
        cmp     [cd_appl_data], 0
        jne     .ide2_appl_data
        mov     [cache_ide2_search_start], edi
        ret
.ide2_appl_data:
        mov     [cache_ide2_appl_search_start], edi
        ret
.ide3:
        cmp     [cd_appl_data], 0
        jne     .ide3_appl_data
        mov     [cache_ide3_search_start], edi
        ret
.ide3_appl_data:
        mov     [cache_ide3_appl_search_start], edi
        ret
;--------------------------------------------------------------------
;align 4
;calculate_linear_to_real:
;    shr eax, 12
;    mov eax, [page_tabs+eax*4]
;    and eax, 0xFFFFF000
;    ret