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kolibrios/kernel/branches/Kolibri-acpi/blkdev/hd_drv.inc
Sergey Semyonov (Serge) 3ed9acd41a kolibri-acpi:update 
git-svn-id: svn://kolibrios.org@4423 a494cfbc-eb01-0410-851d-a64ba20cac60
2014-01-01 21:16:27 +00:00

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision$
; Low-level driver for HDD access
; DMA support by Mario79
; LBA48 support by Mario79
;-----------------------------------------------------------------------------
struct HD_DATA
hdbase dd ?
hdid dd ?
hdpos dd ?
ends
iglobal
align 4
ide_callbacks:
dd ide_callbacks.end - ide_callbacks ; strucsize
dd 0 ; no close function
dd 0 ; no closemedia function
dd ide_querymedia
dd ide_read
dd ide_write
dd 0 ; no flush function
dd 0 ; use default cache size
.end:
hd0_data HD_DATA ?, 0, 1
hd1_data HD_DATA ?, 0x10, 2
hd2_data HD_DATA ?, 0, 3
hd3_data HD_DATA ?, 0x10, 4
hd_address_table:
dd 0x1f0, 0x00, 0x1f0, 0x10
dd 0x170, 0x00, 0x170, 0x10
endg
uglobal
ide_mutex MUTEX
ide_channel1_mutex MUTEX
ide_channel2_mutex MUTEX
endg
proc ide_read stdcall uses edi, \
hd_data, buffer, startsector:qword, numsectors
; hd_data = pointer to hd*_data
; buffer = pointer to buffer for data
; startsector = 64-bit start sector
; numsectors = pointer to number of sectors on input,
; must be filled with number of sectors really read
locals
sectors_todo dd ?
channel_lock dd ?
endl
; 1. Initialize number of sectors: get number of requested sectors
; and say that no sectors were read yet.
mov ecx, [numsectors]
mov eax, [ecx]
mov dword [ecx], 0
mov [sectors_todo], eax
; 2. Acquire the global lock.
mov ecx, ide_mutex
call mutex_lock
mov ecx, ide_channel2_mutex
mov eax, [hd_data]
push ecx
mov ecx, [hd_address_table]
cmp [eax+HD_DATA.hdbase], ecx ; 0x1F0
pop ecx
jne .IDE_Channel_2
mov ecx, ide_channel1_mutex
.IDE_Channel_2:
mov [channel_lock], ecx
call mutex_lock
; 3. Convert parameters to the form suitable for worker procedures.
; Underlying procedures do not know about 64-bit sectors.
; Worker procedures use global variables and edi for [buffer].
cmp dword [startsector+4], 0
jnz .fail
and [hd_error], 0
mov ecx, [hd_data]
mov eax, [ecx+HD_DATA.hdbase]
mov [hdbase], eax
mov eax, [ecx+HD_DATA.hdid]
mov [hdid], eax
mov eax, [ecx+HD_DATA.hdpos]
mov [hdpos], eax
mov eax, dword [startsector]
mov edi, [buffer]
; 4. Worker procedures take one sectors per time, so loop over all sectors to read.
.sectors_loop:
; DMA read is permitted if [allow_dma_access]=1 or 2
cmp [allow_dma_access], 2
ja .nodma
cmp [dma_hdd], 1
jnz .nodma
;--------------------------------------
push eax
mov eax, [hd_address_table]
cmp [hdbase], eax ; 0x1F0
pop eax
jnz @f
test [DRIVE_DATA+1], byte 10100000b
jnz .nodma
jmp .dma
@@:
test [DRIVE_DATA+1], byte 1010b
jnz .nodma
.dma:
;--------------------------------------
call hd_read_dma
jmp @f
.nodma:
call hd_read_pio
@@:
cmp [hd_error], 0
jnz .fail
mov ecx, [numsectors]
inc dword [ecx] ; one more sector is read
dec [sectors_todo]
jz .done
inc eax
jnz .sectors_loop
; 5. Loop is done, either due to error or because everything is done.
; Release the global lock and return the corresponding status.
.fail:
mov ecx, [channel_lock]
call mutex_unlock
mov ecx, ide_mutex
call mutex_unlock
or eax, -1
ret
.done:
mov ecx, [channel_lock]
call mutex_unlock
mov ecx, ide_mutex
call mutex_unlock
xor eax, eax
ret
endp
proc ide_write stdcall uses esi edi, \
hd_data, buffer, startsector:qword, numsectors
; hd_data = pointer to hd*_data
; buffer = pointer to buffer with data
; startsector = 64-bit start sector
; numsectors = pointer to number of sectors on input,
; must be filled with number of sectors really written
locals
sectors_todo dd ?
channel_lock dd ?
endl
; 1. Initialize number of sectors: get number of requested sectors
; and say that no sectors were read yet.
mov ecx, [numsectors]
mov eax, [ecx]
mov dword [ecx], 0
mov [sectors_todo], eax
; 2. Acquire the global lock.
mov ecx, ide_mutex
call mutex_lock
mov ecx, ide_channel2_mutex
mov eax, [hd_data]
push ecx
mov ecx, [hd_address_table]
cmp [eax+HD_DATA.hdbase], ecx ; 0x1F0
pop ecx
jne .IDE_Channel_2
mov ecx, ide_channel1_mutex
.IDE_Channel_2:
mov [channel_lock], ecx
call mutex_lock
; 3. Convert parameters to the form suitable for worker procedures.
; Underlying procedures do not know about 64-bit sectors.
; Worker procedures use global variables and esi for [buffer].
cmp dword [startsector+4], 0
jnz .fail
and [hd_error], 0
mov ecx, [hd_data]
mov eax, [ecx+HD_DATA.hdbase]
mov [hdbase], eax
mov eax, [ecx+HD_DATA.hdid]
mov [hdid], eax
mov eax, [ecx+HD_DATA.hdpos]
mov [hdpos], eax
mov esi, [buffer]
lea edi, [startsector]
mov [cache_chain_ptr], edi
; 4. Worker procedures take max 16 sectors per time,
; loop until all sectors will be processed.
.sectors_loop:
mov ecx, 16
cmp ecx, [sectors_todo]
jbe @f
mov ecx, [sectors_todo]
@@:
mov [cache_chain_size], cl
; DMA write is permitted only if [allow_dma_access]=1
cmp [allow_dma_access], 2
jae .nodma
cmp [dma_hdd], 1
jnz .nodma
;--------------------------------------
push eax
mov eax, [hd_address_table]
cmp [hdbase], eax ; 0x1F0
pop eax
jnz @f
test [DRIVE_DATA+1], byte 10100000b
jnz .nodma
jmp .dma
@@:
test [DRIVE_DATA+1], byte 1010b
jnz .nodma
.dma:
;--------------------------------------
call cache_write_dma
jmp .common
.nodma:
mov [cache_chain_size], 1
call cache_write_pio
.common:
cmp [hd_error], 0
jnz .fail
movzx ecx, [cache_chain_size]
mov eax, [numsectors]
add [eax], ecx
sub [sectors_todo], ecx
jz .done
add [edi], ecx
jc .fail
shl ecx, 9
add esi, ecx
jmp .sectors_loop
; 5. Loop is done, either due to error or because everything is done.
; Release the global lock and return the corresponding status.
.fail:
mov ecx, [channel_lock]
call mutex_unlock
mov ecx, ide_mutex
call mutex_unlock
or eax, -1
ret
.done:
mov ecx, [channel_lock]
call mutex_unlock
mov ecx, ide_mutex
call mutex_unlock
xor eax, eax
ret
endp
; This is a stub.
proc ide_querymedia stdcall, hd_data, mediainfo
mov eax, [mediainfo]
mov [eax+DISKMEDIAINFO.Flags], 0
mov [eax+DISKMEDIAINFO.SectorSize], 512
or dword [eax+DISKMEDIAINFO.Capacity], 0xFFFFFFFF
or dword [eax+DISKMEDIAINFO.Capacity+4], 0xFFFFFFFF
xor eax, eax
ret
endp
;-----------------------------------------------------------------------------
align 4
; input: eax = sector, edi -> buffer
; output: edi = edi + 512
hd_read_pio:
push eax edx
; Select the desired drive
mov edx, [hdbase]
add edx, 6 ;адрес регистра головок
mov al, byte [hdid]
add al, 128+64+32
out dx, al; номер головки/номер диска
call wait_for_hd_idle
cmp [hd_error], 0
jne hd_read_error
; ATA with 28 or 48 bit for sector number?
mov eax, [esp+4]
cmp eax, 0x10000000
jae .lba48
;--------------------------------------
.lba28:
pushfd
cli
xor eax, eax
mov edx, [hdbase]
inc edx
out dx, al ; ATA Features регистр "особенностей"
inc edx
inc eax
out dx, al ; ATA Sector Counter счётчик секторов
inc edx
mov eax, [esp+4+4]
out dx, al ; LBA Low LBA (7:0)
shr eax, 8
inc edx
out dx, al ; LBA Mid LBA (15:8)
shr eax, 8
inc edx
out dx, al ; LBA High LBA (23:16)
shr eax, 8
inc edx
and al, 1+2+4+8 ; LBA (27:24)
add al, byte [hdid]
add al, 128+64+32
out dx, al ; номер головки/номер диска
inc edx
mov al, 20h ; READ SECTOR(S)
out dx, al ; ATACommand регистр команд
popfd
jmp .continue
;--------------------------------------
.lba48:
pushfd
cli
xor eax, eax
mov edx, [hdbase]
inc edx
out dx, al ; Features Previous Reserved
out dx, al ; Features Current Reserved
inc edx
out dx, al ; Sector Count Previous Sector count (15:8)
inc eax
out dx, al ; Sector Count Current Sector count (7:0)
inc edx
mov eax, [esp+4+4]
rol eax, 8
out dx, al ; LBA Low Previous LBA (31:24)
xor eax, eax ; because only 32 bit cache
inc edx
out dx, al ; LBA Mid Previous LBA (39:32)
inc edx
out dx, al ; LBA High Previous LBA (47:40)
sub edx, 2
mov eax, [esp+4+4]
out dx, al ; LBA Low Current LBA (7:0)
shr eax, 8
inc edx
out dx, al ; LBA Mid Current LBA (15:8)
shr eax, 8
inc edx
out dx, al ; LBA High Current LBA (23:16)
inc edx
mov al, byte [hdid]
add al, 128+64+32
out dx, al ; номер головки/номер диска
inc edx
mov al, 24h ; READ SECTOR(S) EXT
out dx, al ; ATACommand регистр команд
popfd
;--------------------------------------
.continue:
call wait_for_sector_buffer
cmp [hd_error], 0
jne hd_read_error
pushfd
cli
mov ecx, 256
mov edx, [hdbase]
cld
rep insw
popfd
pop edx eax
ret
;-----------------------------------------------------------------------------
align 4
; edi -> sector, esi -> data
cache_write_pio:
; Select the desired drive
mov edx, [hdbase]
add edx, 6 ;адрес регистра головок
mov al, byte [hdid]
add al, 128+64+32
out dx, al ; номер головки/номер диска
call wait_for_hd_idle
cmp [hd_error], 0
jne hd_write_error
; ATA with 28 or 48 bit for sector number?
mov eax, [edi]
cmp eax, 0x10000000
jae .lba48
;--------------------------------------
.lba28:
pushfd
cli
xor eax, eax
mov edx, [hdbase]
inc edx
out dx, al ; ATA Features регистр "особенностей"
inc edx
inc eax
out dx, al ; ATA Sector Counter счётчик секторов
inc edx
mov eax, [edi] ; eax = sector to write
out dx, al ; LBA Low LBA (7:0)
shr eax, 8
inc edx
out dx, al ; LBA Mid LBA (15:8)
shr eax, 8
inc edx
out dx, al ; LBA High LBA (23:16)
shr eax, 8
inc edx
and al, 1+2+4+8 ; LBA (27:24)
add al, byte [hdid]
add al, 128+64+32
out dx, al ; номер головки/номер диска
inc edx
mov al, 30h ; WRITE SECTOR(S)
out dx, al ; ATACommand регистр команд
jmp .continue
;--------------------------------------
.lba48:
pushfd
cli
xor eax, eax
mov edx, [hdbase]
inc edx
out dx, al ; Features Previous Reserved
out dx, al ; Features Current Reserved
inc edx
out dx, al ; Sector Count Previous Sector count (15:8)
inc eax
out dx, al ; Sector Count Current Sector count (7:0)
inc edx
mov eax, [edi]
rol eax, 8
out dx, al ; LBA Low Previous LBA (31:24)
xor eax, eax ; because only 32 bit cache
inc edx
out dx, al ; LBA Mid Previous LBA (39:32)
inc edx
out dx, al ; LBA High Previous LBA (47:40)
sub edx, 2
mov eax, [edi]
out dx, al ; LBA Low Current LBA (7:0)
shr eax, 8
inc edx
out dx, al ; LBA Mid Current LBA (15:8)
shr eax, 8
inc edx
out dx, al ; LBA High Current LBA (23:16)
inc edx
mov al, byte [hdid]
add al, 128+64+32
out dx, al ; номер головки/номер диска
inc edx
mov al, 34h ; WRITE SECTOR(S) EXT
out dx, al ; ATACommand регистр команд
;--------------------------------------
.continue:
popfd
call wait_for_sector_buffer
cmp [hd_error], 0
jne hd_write_error
push ecx esi
pushfd
cli
mov ecx, 256
mov edx, [hdbase]
cld
rep outsw
popfd
pop esi ecx
ret
;-----------------------------------------------------------------------------
align 4
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
;-----------------------------------------------------------------------------
hd_timeout_error:
if lang eq sp
DEBUGF 1,"K : FS - HD tiempo de espera agotado\n"
else
DEBUGF 1,"K : FS - HD timeout\n"
end if
mov [hd_error], 1
pop eax
ret
;-----------------------------------------------------------------------------
hd_read_error:
if lang eq sp
DEBUGF 1,"K : FS - HD error de lectura\n"
else
DEBUGF 1,"K : FS - HD read error\n"
end if
pop edx eax
ret
;-----------------------------------------------------------------------------
hd_write_error_dma:
pop esi
hd_write_error:
if lang eq sp
DEBUGF 1,"K : FS - HD error de escritura\n"
else
DEBUGF 1,"K : FS - HD write error\n"
end if
ret
;-----------------------------------------------------------------------------
align 4
wait_for_hd_idle:
push eax edx
call save_hd_wait_timeout
mov edx, [hdbase]
add edx, 0x7
;--------------------------------------
align 4
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
;--------------------------------------
align 4
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
;-----------------------------------------------------------------------------
irq14_num equ byte 14
irq15_num equ byte 15
;-----------------------------------------------------------------------------
align 4
wait_for_sector_dma_ide0:
push eax
push edx
call save_hd_wait_timeout
;--------------------------------------
align 4
.wait:
call change_task
cmp [IDE_common_irq_param], 0
jz .done
call check_hd_wait_timeout
cmp [hd_error], 0
jz .wait
; clear Bus Master IDE Command register
pushfd
cli
mov [IDE_common_irq_param], 0
mov dx, [IDEContrRegsBaseAddr]
mov al, 0
out dx, al
popfd
;--------------------------------------
align 4
.done:
pop edx
pop eax
ret
;-----------------------------------------------------------------------------
align 4
wait_for_sector_dma_ide1:
push eax
push edx
call save_hd_wait_timeout
;--------------------------------------
align 4
.wait:
call change_task
cmp [IDE_common_irq_param], 0
jz .done
call check_hd_wait_timeout
cmp [hd_error], 0
jz .wait
; clear Bus Master IDE Command register
pushfd
cli
mov [IDE_common_irq_param], 0
mov dx, [IDEContrRegsBaseAddr]
add dx, 8
mov al, 0
out dx, al
popfd
;--------------------------------------
align 4
.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 IDE_DMA
dw 0x2000
dw 0x8000
dma_cur_sector dd not 40h
dma_hdpos dd 0
IDE_common_irq_param db 0
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
IDE_irq_14_handler:
cmp [IDE_common_irq_param], irq14_num
jne .exit
pushfd
cli
pushad
mov [IDE_common_irq_param], 0
mov dx, [IDEContrRegsBaseAddr]
; test whether it is our interrupt?
add edx, 2
in al, dx
test al, 100b
jz @f
; clear Bus Master IDE Status register
; clear Interrupt bit
out dx, al
; clear Bus Master IDE Command register
sub edx, 2
xor eax, eax
out dx, al
; read status register and remove the interrupt request
mov edx, [hdbase]
add edx, 0x7
in al, dx
popad
popfd
mov al, 1
ret
;--------------------------------------
align 4
@@:
popad
popfd
;--------------------------------------
align 4
.exit:
mov al, 0
ret
;-----------------------------------------------------------------------------
align 4
IDE_irq_15_handler:
cmp [IDE_common_irq_param], irq15_num
jne .exit
pushfd
cli
pushad
mov [IDE_common_irq_param], 0
mov dx, [IDEContrRegsBaseAddr]
add dx, 8
; test whether it is our interrupt?
add edx, 2
in al, dx
test al, 100b
jz @f
; clear Bus Master IDE Status register
; clear Interrupt bit
out dx, al
; clear Bus Master IDE Command register
sub edx, 2
mov al, 0
out dx, al
; read status register and remove the interrupt request
mov edx, [hdbase]
add edx, 0x7
in al, dx
popad
popfd
mov al, 1
ret
;--------------------------------------
align 4
@@:
popad
popfd
;--------------------------------------
align 4
.exit:
mov al, 0
ret
;-----------------------------------------------------------------------------
align 4
IDE_common_irq_handler:
cmp [IDE_common_irq_param], 0
je .exit
pushfd
cli
pushad
xor ebx, ebx
mov dx, [IDEContrRegsBaseAddr]
mov eax, IDE_common_irq_param
cmp [eax], irq14_num
mov [eax], bl
je @f
add dx, 8
;--------------------------------------
align 4
@@:
; test whether it is our interrupt?
add edx, 2
in al, dx
test al, 100b
jz @f
; clear Bus Master IDE Status register
; clear Interrupt bit
out dx, al
; clear Bus Master IDE Command register
sub edx, 2
xor eax, eax
out dx, al
; read status register and remove the interrupt request
mov edx, [hdbase]
add edx, 0x7
in al, dx
popad
popfd
mov al, 1
ret
;--------------------------------------
align 4
@@:
popad
popfd
;--------------------------------------
align 4
.exit:
mov al, 0
ret
;-----------------------------------------------------------------------------
align 4
hd_read_dma:
push eax
push edx
mov edx, [dma_hdpos]
cmp edx, [hdpos]
jne .notread
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+IDE_DMA)
push ecx esi
mov esi, eax
mov ecx, 512/4
cld
rep movsd
pop esi ecx
pop edx
pop eax
ret
.notread:
; set data for PRD Table
mov eax, IDE_descriptor_table
mov dword [eax], IDE_DMA
mov word [eax+4], 0x2000
sub eax, OS_BASE
; select controller Primary or Secondary
mov dx, [IDEContrRegsBaseAddr]
push eax
mov eax, [hd_address_table]
cmp [hdbase], eax ; 0x1F0
pop eax
jz @f
add edx, 8
@@:
push edx
; Bus Master IDE PRD Table Address
add edx, 4
; save IDE_descriptor_table
out dx, eax
pop edx
; clear Bus Master IDE Command register
mov al, 0
out dx, al
; clear Bus Master IDE Status register
; clear Error bit and Interrupt bit
add edx, 2
mov al, 6 ; 110b
out dx, al
; Select the desired drive
mov edx, [hdbase]
add edx, 6 ; адрес регистра головок
mov al, byte [hdid]
add al, 128+64+32
out dx, al ; номер головки/номер диска
call wait_for_hd_idle
cmp [hd_error], 0
jnz hd_read_error
; ATA with 28 or 48 bit for sector number?
mov eax, [esp+4]
; -10h because the PreCache hits the boundary between lba28 and lba48
; 10h = 16 - size of PreCache
cmp eax, 0x10000000-10h
jae .lba48
;--------------------------------------
.lba28:
pushfd
cli
xor eax, eax
mov edx, [hdbase]
inc edx
out dx, al ; ATA Features регистр "особенностей"
inc edx
mov eax, 10h ; Sector Counter = 16 ; PreCache
out dx, al ; ATA Sector Counter счётчик секторов
inc edx
mov eax, [esp+4+4]
out dx, al ; LBA Low LBA (7:0)
shr eax, 8
inc edx
out dx, al ; LBA Mid LBA (15:8)
shr eax, 8
inc edx
out dx, al ; LBA High LBA (23:16)
shr eax, 8
inc edx
and al, 0xF ; LBA (27:24)
add al, byte [hdid]
add al, 11100000b
out dx, al ; номер головки/номер диска
inc edx
mov al, 0xC8 ; READ DMA
out dx, al ; ATACommand регистр команд
jmp .continue
;--------------------------------------
.lba48:
pushfd
cli
xor eax, eax
mov edx, [hdbase]
inc edx
out dx, al ; Features Previous Reserved
out dx, al ; Features Current Reserved
inc edx
out dx, al ; Sector Count Previous Sector count (15:8)
mov eax, 10h ; Sector Counter = 16 PreCache
out dx, al ; Sector Count Current Sector count (7:0)
inc edx
mov eax, [esp+4+4]
rol eax, 8
out dx, al ; LBA Low Previous LBA (31:24)
xor eax, eax ; because only 32 bit cache
inc edx
out dx, al ; LBA Mid Previous LBA (39:32)
inc edx
out dx, al ; LBA High Previous LBA (47:40)
sub edx, 2
mov eax, [esp+4+4]
out dx, al ; LBA Low Current LBA (7:0)
shr eax, 8
inc edx
out dx, al ; LBA Mid Current LBA (15:8)
shr eax, 8
inc edx
out dx, al ; LBA High Current LBA (23:16)
inc edx
mov al, byte [hdid]
add al, 128+64+32
out dx, al ; номер головки/номер диска
inc edx
mov al, 25h ; READ DMA EXT
out dx, al ; ATACommand регистр команд
;--------------------------------------
.continue:
; select controller Primary or Secondary
mov dx, [IDEContrRegsBaseAddr]
mov eax, [hd_address_table]
cmp [hdbase], eax ; 0x1F0
jz @f
add dx, 8
@@:
; set write to memory and Start Bus Master
mov al, 9
out dx, al
mov eax, [CURRENT_TASK]
mov [dma_process], eax
mov eax, [TASK_BASE]
mov [dma_slot_ptr], eax
mov eax, [hd_address_table]
cmp [hdbase], eax ; 0x1F0
jnz .ide1
mov [IDE_common_irq_param], irq14_num
jmp @f
.ide1:
mov [IDE_common_irq_param], irq15_num
@@:
popfd
; wait for interrupt
mov eax, [hd_address_table]
cmp [hdbase], eax ; 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
mov eax, [hdpos]
mov [dma_hdpos], eax
pop edx
pop eax
mov [dma_cur_sector], eax
jmp hd_read_dma
;-----------------------------------------------------------------------------
cache_write_dma:
mov eax, [cache_chain_ptr] ; for what?
push esi
; set data for PRD Table
mov eax, IDE_descriptor_table
mov edx, eax
pusha
mov edi, (OS_BASE+IDE_DMA)
mov dword [edx], IDE_DMA
movzx ecx, [cache_chain_size]
shl ecx, 9
mov word [edx+4], cx
shr ecx, 2
cld
rep movsd
popa
sub eax, OS_BASE
; select controller Primary or Secondary
mov dx, [IDEContrRegsBaseAddr]
push eax
mov eax, [hd_address_table]
cmp [hdbase], eax ; 0x1F0
pop eax
jz @f
add edx, 8
@@:
push edx
; Bus Master IDE PRD Table Address
add edx, 4
; save IDE_descriptor_table
out dx, eax
pop edx
; clear Bus Master IDE Command register
mov al, 0
out dx, al
; clear Bus Master IDE Status register
; clear Error bit and Interrupt bit
add edx, 2
mov al, 6
out dx, al
; Select the desired drive
mov edx, [hdbase]
add edx, 6 ; адрес регистра головок
mov al, byte [hdid]
add al, 128+64+32
out dx, al ; номер головки/номер диска
call wait_for_hd_idle
cmp [hd_error], 0
jnz hd_write_error_dma
; ATA with 28 or 48 bit for sector number?
mov esi, [cache_chain_ptr]
mov eax, [esi]
; -40h because the PreCache hits the boundary between lba28 and lba48
; 40h = 64 - the maximum number of sectors to be written for one command
cmp eax, 0x10000000-40h
jae .lba48
;--------------------------------------
.lba28:
pushfd
cli
xor eax, eax
mov edx, [hdbase]
inc edx
out dx, al ; ATA Features регистр "особенностей"
inc edx
mov al, [cache_chain_size] ; Sector Counter
out dx, al ; ATA Sector Counter счётчик секторов
inc edx
mov eax, [esi]
out dx, al ; LBA Low LBA (7:0)
shr eax, 8
inc edx
out dx, al ; LBA Mid LBA (15:8)
shr eax, 8
inc edx
out dx, al ; LBA High LBA (23:16)
shr eax, 8
inc edx
and al, 0xF ; LBA (27:24)
add al, byte [hdid]
add al, 11100000b
out dx, al ; номер головки/номер диска
inc edx
mov al, 0xCA ; WRITE DMA
out dx, al ; ATACommand регистр команд
jmp .continue
;--------------------------------------
.lba48:
pushfd
cli
xor eax, eax
mov edx, [hdbase]
inc edx
out dx, al ; Features Previous Reserved
out dx, al ; Features Current Reserved
inc edx
out dx, al ; Sector Count Previous Sector count (15:8)
mov al, [cache_chain_size] ; Sector Counter
out dx, al ; Sector Count Current Sector count (7:0)
inc edx
mov eax, [esi]
rol eax, 8
out dx, al ; LBA Low Previous LBA (31:24)
xor eax, eax ; because only 32 bit cache
inc edx
out dx, al ; LBA Mid Previous LBA (39:32)
inc edx
out dx, al ; LBA High Previous LBA (47:40)
sub edx, 2
mov eax, [esi]
out dx, al ; LBA Low Current LBA (7:0)
shr eax, 8
inc edx
out dx, al ; LBA Mid Current LBA (15:8)
shr eax, 8
inc edx
out dx, al ; LBA High Current LBA (23:16)
inc edx
mov al, byte [hdid]
add al, 128+64+32
out dx, al ; номер головки/номер диска
inc edx
mov al, 35h ; WRITE DMA EXT
out dx, al ; ATACommand регистр команд
;--------------------------------------
.continue:
; select controller Primary or Secondary
mov dx, [IDEContrRegsBaseAddr]
mov eax, [hd_address_table]
cmp [hdbase], eax ; 0x1F0
jz @f
add dx, 8
@@:
; set write to device and Start Bus Master
mov al, 1
out dx, al
mov eax, [CURRENT_TASK]
mov [dma_process], eax
mov eax, [TASK_BASE]
mov [dma_slot_ptr], eax
mov eax, [hd_address_table]
cmp [hdbase], eax ; 0x1F0
jnz .ide1
mov [IDE_common_irq_param], irq14_num
jmp @f
.ide1:
mov [IDE_common_irq_param], irq15_num
@@:
popfd
; wait for interrupt
mov [dma_cur_sector], not 0x40
mov eax, [hd_address_table]
cmp [hdbase], eax ; 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
align 4
IDE_Interrupt dw ?
IDEContrRegsBaseAddr dw ?
IDEContrProgrammingInterface dw ?
IDE_BAR0_val dw ?
IDE_BAR1_val dw ?
IDE_BAR2_val dw ?
IDE_BAR3_val dw ?
endg
;-----------------------------------------------------------------------------
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