$Revision: 580 $
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Low-level driver for HDD access
; DMA support by Mario79
align 4
hd_read:
;-----------------------------------------------------------
; input : eax = block to read
; ebx = destination
;-----------------------------------------------------------
and [hd_error], 0
push ecx esi edi ; scan cache
; mov ecx,cache_max ; entries in cache
; mov esi,HD_CACHE+8
call calculate_cache
add esi,8
mov edi,1
hdreadcache:
cmp dword [esi+4],0 ; empty
je nohdcache
cmp [esi],eax ; correct sector
je yeshdcache
nohdcache:
add esi,8
inc edi
dec ecx
jnz hdreadcache
call find_empty_slot ; ret in edi
cmp [hd_error],0
jne return_01
; DMA read is permitted if [allow_dma_access]=1 or 2
cmp [allow_dma_access], 2
ja .nodma
cmp [dma_hdd], 1
jnz .nodma
call hd_read_dma
jmp @f
.nodma:
call hd_read_pio
@@:
; lea esi,[edi*8+HD_CACHE]
; push eax
call calculate_cache_1
lea esi,[edi*8+esi]
; pop eax
mov [esi],eax ; sector number
mov dword [esi+4],1 ; hd read - mark as same as in hd
yeshdcache:
mov esi,edi
shl esi,9
; add esi,HD_CACHE+65536
push eax
call calculate_cache_2
add esi,eax
pop eax
mov edi,ebx
mov ecx,512/4
cld
rep movsd ; move data
return_01:
pop edi esi ecx
ret
align 4
hd_read_pio:
push eax edx
call wait_for_hd_idle
cmp [hd_error],0
jne hd_read_error
cli
xor eax,eax
mov edx,[hdbase]
inc edx
out dx,al ; ATAFeatures ॣ¨áâà "®á®¡¥®á⥩"
inc edx
inc eax
out dx,al ; ATASectorCount áçñâ稪 ᥪâ®à®¢
inc edx
mov eax,[esp+4]
out dx,al ; ATASectorNumber ॣ¨áâà ®¬¥à ᥪâ®à
shr eax,8
inc edx
out dx,al ; ATACylinder ®¬¥à 樫¨¤à (¬« ¤è¨© ¡ ©â)
shr eax,8
inc edx
out dx,al ; ®¬¥à 樫¨¤à (áâ à訩 ¡ ©â)
shr eax,8
inc edx
and al,1+2+4+8
add al,byte [hdid]
add al,128+64+32
out dx,al ; ®¬¥à £®«®¢ª¨/®¬¥à ¤¨áª
inc edx
mov al,20h
out dx,al ; ATACommand ॣ¨áâà ª®¬ ¤
sti
call wait_for_sector_buffer
cmp [hd_error],0
jne hd_read_error
cli
push edi
shl edi,9
; add edi,HD_CACHE+65536
push eax
call calculate_cache_2
add edi,eax
pop eax
mov ecx,256
mov edx,[hdbase]
cld
rep insw
pop edi
sti
pop edx eax
ret
disable_ide_int:
; mov edx,[hdbase]
; add edx,0x206
; mov al,2
; out dx,al
cli
ret
enable_ide_int:
; mov edx,[hdbase]
; add edx,0x206
; mov al,0
; out dx,al
sti
ret
align 4
hd_write:
;-----------------------------------------------------------
; input : eax = block
; ebx = pointer to memory
;-----------------------------------------------------------
push ecx esi edi
; check if the cache already has the sector and overwrite it
; mov ecx,cache_max
; mov esi,HD_CACHE+8
call calculate_cache
add esi,8
mov edi,1
hdwritecache:
cmp dword [esi+4],0 ; if cache slot is empty
je not_in_cache_write
cmp [esi],eax ; if the slot has the sector
je yes_in_cache_write
not_in_cache_write:
add esi,8
inc edi
dec ecx
jnz hdwritecache
; sector not found in cache
; write the block to a new location
call find_empty_slot ; ret in edi
cmp [hd_error],0
jne hd_write_access_denied
; lea esi,[edi*8+HD_CACHE]
; push eax
call calculate_cache_1
lea esi,[edi*8+esi]
; pop eax
mov [esi],eax ; sector number
yes_in_cache_write:
mov dword [esi+4],2 ; write - differs from hd
shl edi,9
; add edi,HD_CACHE+65536
push eax
call calculate_cache_2
add edi,eax
pop eax
mov esi,ebx
mov ecx,512/4
cld
rep movsd ; move data
hd_write_access_denied:
pop edi esi ecx
ret
align 4
cache_write_pio:
; call disable_ide_int
call wait_for_hd_idle
cmp [hd_error],0
jne hd_write_error
cli
xor eax,eax
mov edx,[hdbase]
inc edx
out dx,al
inc edx
inc eax
out dx,al
inc edx
mov eax,[esi] ; eax = sector to write
out dx,al
shr eax,8
inc edx
out dx,al
shr eax,8
inc edx
out dx,al
shr eax,8
inc edx
and al,1+2+4+8
add al,byte [hdid]
add al,128+64+32
out dx,al
inc edx
mov al,30h
out dx,al
sti
call wait_for_sector_buffer
cmp [hd_error],0
jne hd_write_error
push ecx esi
cli
mov esi,edi
shl esi,9
; add esi,HD_CACHE+65536 ; esi = from memory position
push eax
call calculate_cache_2
add esi,eax
pop eax
mov ecx,256
mov edx,[hdbase]
cld
rep outsw
sti
; call enable_ide_int
pop esi ecx
ret
save_hd_wait_timeout:
push eax
mov eax,[timer_ticks]
add eax,300 ; 3 sec timeout
mov [hd_wait_timeout],eax
pop eax
ret
align 4
check_hd_wait_timeout:
push eax
mov eax,[hd_wait_timeout]
cmp [timer_ticks], eax
jg hd_timeout_error
pop eax
mov [hd_error],0
ret
;iglobal
; hd_timeout_str db 'K : FS - HD timeout',0
; hd_read_str db 'K : FS - HD read error',0
; hd_write_str db 'K : FS - HD write error',0
; hd_lba_str db 'K : FS - HD LBA error',0
;endg
hd_timeout_error:
; call clear_hd_cache
; call clear_application_table_status
; mov esi,hd_timeout_str
; call sys_msg_board_str
DEBUGF 1,"K : FS - HD timeout\n"
mov [hd_error],1
pop eax
ret
hd_read_error:
; call clear_hd_cache
; call clear_application_table_status
; mov esi,hd_read_str
; call sys_msg_board_str
DEBUGF 1,"K : FS - HD read error\n"
pop edx eax
ret
hd_write_error:
; call clear_hd_cache
; call clear_application_table_status
; mov esi,hd_write_str
; call sys_msg_board_str
DEBUGF 1,"K : FS - HD write error\n"
ret
hd_write_error_dma:
; call clear_hd_cache
; call clear_application_table_status
; mov esi, hd_write_str
; call sys_msg_board_str
DEBUGF 1,"K : FS - HD read error\n"
pop esi
ret
hd_lba_error:
; call clear_hd_cache
; call clear_application_table_status
; mov esi,hd_lba_str
; call sys_msg_board_str
DEBUGF 1,"K : FS - HD LBA error\n"
jmp LBA_read_ret
align 4
wait_for_hd_idle:
push eax edx
call save_hd_wait_timeout
mov edx,[hdbase]
add edx,0x7
wfhil1:
call check_hd_wait_timeout
cmp [hd_error],0
jne @f
in al,dx
test al,128
jnz wfhil1
@@:
pop edx eax
ret
align 4
wait_for_sector_buffer:
push eax edx
mov edx,[hdbase]
add edx,0x7
call save_hd_wait_timeout
hdwait_sbuf: ; wait for sector buffer to be ready
call check_hd_wait_timeout
cmp [hd_error],0
jne @f
in al,dx
test al,8
jz hdwait_sbuf
mov [hd_error],0
cmp [hd_setup],1 ; do not mark error for setup request
je buf_wait_ok
test al,1 ; previous command ended up with an error
jz buf_wait_ok
@@:
mov [hd_error],1
buf_wait_ok:
pop edx eax
ret
; \begin{Mario79}
align 4
wait_for_sector_dma_ide0:
push eax
push edx
call save_hd_wait_timeout
.wait:
call change_task
cmp [irq14_func], hdd_irq14
jnz .done
call check_hd_wait_timeout
cmp [hd_error], 0
jz .wait
mov [irq14_func], hdd_irq_null
mov dx, [IDEContrRegsBaseAddr]
mov al, 0
out dx, al
.done:
pop edx
pop eax
ret
align 4
wait_for_sector_dma_ide1:
push eax
push edx
call save_hd_wait_timeout
.wait:
call change_task
cmp [irq15_func], hdd_irq15
jnz .done
call check_hd_wait_timeout
cmp [hd_error], 0
jz .wait
mov [irq15_func], hdd_irq_null
mov dx, [IDEContrRegsBaseAddr]
add dx, 8
mov al, 0
out dx, al
.done:
pop edx
pop eax
ret
iglobal
align 4
; note that IDE descriptor table must be 4-byte aligned and do not cross 4K boundary
IDE_descriptor_table:
dd 0x284000
dw 0x2000
dw 0x8000
dma_cur_sector dd not 40h
irq14_func dd hdd_irq_null
irq15_func dd hdd_irq_null
endg
uglobal
; all uglobals are zeroed at boot
dma_process dd 0
dma_slot_ptr dd 0
cache_chain_pos dd 0
cache_chain_ptr dd 0
cache_chain_size db 0
cache_chain_started db 0
dma_task_switched db 0
dma_hdd db 0
allow_dma_access db 0
endg
align 4
hdd_irq14:
pushfd
cli
pushad
mov [irq14_func], hdd_irq_null
mov dx, [IDEContrRegsBaseAddr]
mov al, 0
out dx, al
; call update_counters
; mov ebx, [dma_process]
; cmp [CURRENT_TASK], ebx
; jz .noswitch
; mov [dma_task_switched], 1
; mov edi, [dma_slot_ptr]
; mov eax, [CURRENT_TASK]
; mov [dma_process], eax
; mov eax, [TASK_BASE]
; mov [dma_slot_ptr], eax
; mov [CURRENT_TASK], ebx
; mov [TASK_BASE], edi
; mov byte [DONT_SWITCH], 1
; call do_change_task
.noswitch:
popad
popfd
align 4
hdd_irq_null:
ret
align 4
hdd_irq15:
pushfd
cli
pushad
mov [irq15_func], hdd_irq_null
mov dx, [IDEContrRegsBaseAddr]
add dx, 8
mov al, 0
out dx, al
; call update_counters
; mov ebx, [dma_process]
; cmp [CURRENT_TASK], ebx
; jz .noswitch
; mov [dma_task_switched], 1
; mov edi, [dma_slot_ptr]
; mov eax, [CURRENT_TASK]
; mov [dma_process], eax
; mov eax, [TASK_BASE]
; mov [dma_slot_ptr], eax
; mov [CURRENT_TASK], ebx
; mov [TASK_BASE], edi
; mov byte [DONT_SWITCH], 1
; call do_change_task
.noswitch:
popad
popfd
ret
align 4
hd_read_dma:
push eax
push edx
mov edx, [dma_cur_sector]
cmp eax, edx
jb .notread
add edx, 15
cmp [esp+4], edx
ja .notread
mov eax, [esp+4]
sub eax, [dma_cur_sector]
shl eax, 9
add eax, OS_BASE+0x284000
push ecx esi edi
mov esi, eax
shl edi, 9
; add edi, HD_CACHE+0x10000
push eax
call calculate_cache_2
add edi,eax
pop eax
mov ecx, 512/4
cld
rep movsd
pop edi esi ecx
pop edx
pop eax
ret
.notread:
mov eax, IDE_descriptor_table
mov dword [eax], 0x284000
mov word [eax+4], 0x2000
sub eax, OS_BASE
mov dx, [IDEContrRegsBaseAddr]
cmp [hdbase], 0x1F0
jz @f
add edx, 8
@@:
push edx
add edx, 4
out dx, eax
pop edx
mov al, 0
out dx, al
add edx, 2
mov al, 6
out dx, al
call wait_for_hd_idle
cmp [hd_error], 0
jnz hd_read_error
call disable_ide_int
xor eax, eax
mov edx, [hdbase]
inc edx
out dx, al
inc edx
mov eax, 10h
out dx, al
inc edx
mov eax, [esp+4]
out dx, al
shr eax, 8
inc edx
out dx, al
shr eax, 8
inc edx
out dx, al
shr eax, 8
inc edx
and al, 0xF
add al, byte [hdid]
add al, 11100000b
out dx, al
inc edx
mov al, 0xC8
out dx, al
mov dx, [IDEContrRegsBaseAddr]
cmp [hdbase], 0x1F0
jz @f
add dx, 8
@@:
mov al, 9
out dx, al
mov eax, [CURRENT_TASK]
mov [dma_process], eax
mov eax, [TASK_BASE]
mov [dma_slot_ptr], eax
cmp [hdbase], 0x1F0
jnz .ide1
mov [irq14_func], hdd_irq14
jmp @f
.ide1:
mov [irq15_func], hdd_irq15
@@:
call enable_ide_int
cmp [hdbase], 0x1F0
jnz .wait_ide1
call wait_for_sector_dma_ide0
jmp @f
.wait_ide1:
call wait_for_sector_dma_ide1
@@:
cmp [hd_error], 0
jnz hd_read_error
pop edx
pop eax
mov [dma_cur_sector], eax
jmp hd_read_dma
align 4
write_cache_sector:
mov [cache_chain_size],1
mov [cache_chain_pos],edi
write_cache_chain:
push esi
mov eax, IDE_descriptor_table
mov edx,eax
pusha
mov esi,[cache_chain_pos]
shl esi, 9
call calculate_cache_2
add esi,eax
mov edi,OS_BASE+0x284000 ;HD_CACHE
mov dword [edx], 0x284000 ;DMA_HD_MEM
movzx ecx, [cache_chain_size]
shl ecx, 9
mov word [edx+4], cx
shr ecx,2
cld
rep movsd
popa
sub eax, OS_BASE
mov dx, [IDEContrRegsBaseAddr]
cmp [hdbase], 0x1F0
jz @f
add edx, 8
@@:
push edx
add edx, 4
out dx, eax
pop edx
mov al, 0
out dx, al
add edx, 2
mov al, 6
out dx, al
call wait_for_hd_idle
cmp [hd_error], 0
jnz hd_write_error_dma
call disable_ide_int
xor eax, eax
mov edx, [hdbase]
inc edx
out dx, al
inc edx
mov al, [cache_chain_size]
out dx, al
inc edx
mov esi, [cache_chain_ptr]
mov eax, [esi]
out dx, al
shr eax, 8
inc edx
out dx, al
shr eax, 8
inc edx
out dx, al
shr eax, 8
inc edx
and al, 0xF
add al, byte [hdid]
add al, 11100000b
out dx, al
inc edx
mov al, 0xCA
out dx, al
mov dx, [IDEContrRegsBaseAddr]
cmp [hdbase], 0x1F0
jz @f
add dx, 8
@@:
mov al, 1
out dx, al
mov eax, [CURRENT_TASK]
mov [dma_process], eax
mov eax, [TASK_BASE]
mov [dma_slot_ptr], eax
cmp [hdbase], 0x1F0
jnz .ide1
mov [irq14_func], hdd_irq14
jmp @f
.ide1:
mov [irq15_func], hdd_irq15
@@:
call enable_ide_int
mov [dma_cur_sector], not 0x40
cmp [hdbase], 0x1F0
jnz .wait_ide1
call wait_for_sector_dma_ide0
jmp @f
.wait_ide1:
call wait_for_sector_dma_ide1
@@:
cmp [hd_error], 0
jnz hd_write_error_dma
pop esi
ret
uglobal
IDEContrRegsBaseAddr dw ?
endg
; \end{Mario79}