;cache_ide0_pointer dd 0
;cache_ide0_size dd 0 ; not use
;cache_ide0_data_pointer dd 0
;cache_ide0_system_data_size dd 0 ; not use
;cache_ide0_appl_data_size dd 0 ; not use
;cache_ide0_system_data dd 0
;cache_ide0_appl_data dd 0
;cache_ide0_system_sad_size dd 0
;cache_ide0_appl_sad_size dd 0
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 @f
mov eax,128*1024
@@:
.continue:
mov [cache_ide0_size],eax
mov [cache_ide1_size],eax
mov [cache_ide2_size],eax
mov [cache_ide3_size],eax
xor eax,eax
mov [cache_ide0_search_start],eax
mov [cache_ide0_appl_search_start],eax
mov [cache_ide1_search_start],eax
mov [cache_ide1_appl_search_start],eax
mov [cache_ide2_search_start],eax
mov [cache_ide2_appl_search_start],eax
mov [cache_ide3_search_start],eax
mov [cache_ide3_appl_search_start],eax
mov [hdd_appl_data],1 ;al
mov [cd_appl_data],1
mov cl,[DRIVE_DATA+1]
mov ch,cl
and cl,11b
cmp cl,0
je .ide2
call get_cache_ide3
.ide2:
mov cl,ch
and cl,1100b
cmp cl,0
je .ide1
call get_cache_ide2
.ide1:
mov cl,ch
and cl,110000b
cmp cl,0
je .ide0
call get_cache_ide1
.ide0:
mov cl,ch
and cl,11000000b
cmp cl,0
je end_get_cache
call get_cache_ide0
jmp end_get_cache
get_cache_ide0:
push ecx
stdcall kernel_alloc,[cache_ide0_size]
mov [cache_ide0_pointer],eax
pop ecx
mov edx,eax
mov eax,[cache_ide0_size]
shr eax,3
mov [cache_ide0_system_data_size],eax
mov ebx,eax
imul eax,7
mov [cache_ide0_appl_data_size],eax
add ebx,edx
mov [cache_ide0_data_pointer],ebx
cmp cl,10000000b
je .cd
push ecx
mov eax,[cache_ide0_system_data_size]
call calculate_for_hd
add eax,[cache_ide0_pointer]
mov [cache_ide0_system_data],eax
mov [cache_ide0_system_sad_size],ecx
push edi
mov edi,[cache_ide0_pointer]
call clear_ide_cache
pop edi
mov eax,[cache_ide0_appl_data_size]
call calculate_for_hd
add eax,[cache_ide0_data_pointer]
mov [cache_ide0_appl_data],eax
mov [cache_ide0_appl_sad_size],ecx
push edi
mov edi,[cache_ide0_data_pointer]
call clear_ide_cache
pop edi
pop ecx
ret
.cd:
push ecx
mov eax,[cache_ide0_system_data_size]
call calculate_for_cd
add eax,[cache_ide0_pointer]
mov [cache_ide0_system_data],eax
mov [cache_ide0_system_sad_size],ecx
push edi
mov edi,[cache_ide0_pointer]
call clear_ide_cache
pop edi
mov eax,[cache_ide0_appl_data_size]
call calculate_for_cd
add eax,[cache_ide0_data_pointer]
mov [cache_ide0_appl_data],eax
mov [cache_ide0_appl_sad_size],ecx
push edi
mov edi,[cache_ide0_data_pointer]
call clear_ide_cache
pop edi
pop ecx
ret
get_cache_ide1:
push ecx
stdcall kernel_alloc,[cache_ide1_size]
mov [cache_ide1_pointer],eax
pop ecx
mov edx,eax
mov eax,[cache_ide1_size]
shr eax,3
mov [cache_ide1_system_data_size],eax
mov ebx,eax
imul eax,7
mov [cache_ide1_appl_data_size],eax
add ebx,edx
mov [cache_ide1_data_pointer],ebx
cmp cl,100000b
je .cd
push ecx
mov eax,[cache_ide1_system_data_size]
call calculate_for_hd
add eax,[cache_ide1_pointer]
mov [cache_ide1_system_data],eax
mov [cache_ide1_system_sad_size],ecx
push edi
mov edi,[cache_ide1_pointer]
call clear_ide_cache
pop edi
mov eax,[cache_ide1_appl_data_size]
call calculate_for_hd
add eax,[cache_ide1_data_pointer]
mov [cache_ide1_appl_data],eax
mov [cache_ide1_appl_sad_size],ecx
push edi
mov edi,[cache_ide1_data_pointer]
call clear_ide_cache
pop edi
pop ecx
ret
.cd:
push ecx
mov eax,[cache_ide1_system_data_size]
call calculate_for_cd
add eax,[cache_ide1_pointer]
mov [cache_ide1_system_data],eax
mov [cache_ide1_system_sad_size],ecx
push edi
mov edi,[cache_ide1_pointer]
call clear_ide_cache
pop edi
mov eax,[cache_ide1_appl_data_size]
call calculate_for_cd
add eax,[cache_ide1_data_pointer]
mov [cache_ide1_appl_data],eax
mov [cache_ide1_appl_sad_size],ecx
push edi
mov edi,[cache_ide1_data_pointer]
call clear_ide_cache
pop edi
pop ecx
ret
get_cache_ide2:
push ecx
stdcall kernel_alloc,[cache_ide2_size]
mov [cache_ide2_pointer],eax
pop ecx
mov edx,eax
mov eax,[cache_ide2_size]
shr eax,3
mov [cache_ide2_system_data_size],eax
mov ebx,eax
imul eax,7
mov [cache_ide2_appl_data_size],eax
add ebx,edx
mov [cache_ide2_data_pointer],ebx
cmp cl,1000b
je .cd
push ecx
mov eax,[cache_ide2_system_data_size]
call calculate_for_hd
add eax,[cache_ide2_pointer]
mov [cache_ide2_system_data],eax
mov [cache_ide2_system_sad_size],ecx
push edi
mov edi,[cache_ide2_pointer]
call clear_ide_cache
pop edi
mov eax,[cache_ide2_appl_data_size]
call calculate_for_hd
add eax,[cache_ide2_data_pointer]
mov [cache_ide2_appl_data],eax
mov [cache_ide2_appl_sad_size],ecx
push edi
mov edi,[cache_ide2_data_pointer]
call clear_ide_cache
pop edi
pop ecx
ret
.cd:
push ecx
mov eax,[cache_ide2_system_data_size]
call calculate_for_cd
add eax,[cache_ide2_pointer]
mov [cache_ide2_system_data],eax
mov [cache_ide2_system_sad_size],ecx
push edi
mov edi,[cache_ide2_pointer]
call clear_ide_cache
pop edi
mov eax,[cache_ide2_appl_data_size]
call calculate_for_cd
add eax,[cache_ide2_data_pointer]
mov [cache_ide2_appl_data],eax
mov [cache_ide2_appl_sad_size],ecx
push edi
mov edi,[cache_ide2_data_pointer]
call clear_ide_cache
pop edi
pop ecx
ret
get_cache_ide3:
push ecx
stdcall kernel_alloc,[cache_ide3_size]
mov [cache_ide3_pointer],eax
pop ecx
mov edx,eax
mov eax,[cache_ide3_size]
shr eax,3
mov [cache_ide3_system_data_size],eax
mov ebx,eax
imul eax,7
mov [cache_ide3_appl_data_size],eax
add ebx,edx
mov [cache_ide3_data_pointer],ebx
cmp cl,10b
je .cd
push ecx
mov eax,[cache_ide3_system_data_size]
call calculate_for_hd
add eax,[cache_ide3_pointer]
mov [cache_ide3_system_data],eax
mov [cache_ide3_system_sad_size],ecx
push edi
mov edi,[cache_ide3_pointer]
call clear_ide_cache
pop edi
mov eax,[cache_ide3_appl_data_size]
call calculate_for_hd
add eax,[cache_ide3_data_pointer]
mov [cache_ide3_appl_data],eax
mov [cache_ide3_appl_sad_size],ecx
push edi
mov edi,[cache_ide3_data_pointer]
call clear_ide_cache
pop edi
pop ecx
ret
.cd:
push ecx
mov eax,[cache_ide3_system_data_size]
call calculate_for_cd
add eax,[cache_ide3_pointer]
mov [cache_ide3_system_data],eax
mov [cache_ide3_system_sad_size],ecx
push edi
mov edi,[cache_ide3_pointer]
call clear_ide_cache
pop edi
mov eax,[cache_ide3_appl_data_size]
call calculate_for_cd
add eax,[cache_ide3_data_pointer]
mov [cache_ide3_appl_data],eax
mov [cache_ide3_appl_sad_size],ecx
push edi
mov edi,[cache_ide3_data_pointer]
call clear_ide_cache
pop edi
pop ecx
ret
calculate_for_hd:
push eax
mov ebx,eax
shr eax,9
shl eax,3
sub ebx,eax
shr ebx,9
mov ecx,ebx
shl ebx,9
pop eax
sub eax,ebx
dec 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:
; mov [cache_ide0_pointer],HD_CACHE
; mov [cache_ide0_system_data],HD_CACHE+65536
; mov [cache_ide0_system_sad_size],1919
popa