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merge ide_read and ide_write

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git-svn-id: svn://kolibrios.org@5570 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
CleverMouse 2015-06-17 18:37:58 +00:00
parent 0ad5c3e509
commit f62c4748c7
1 changed files with 15 additions and 93 deletions
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108
kernel/trunk/blkdev/hd_drv.inc
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@ -68,17 +68,27 @@ eventPointer dd ?
eventID dd ?
endg
;-----------------------------------------------------------------
proc ide_read stdcall uses esi edi ebx, \
ide_read:
mov al, 25h ; READ DMA EXT
jmp ide_read_write
ide_write:
mov al, 35h ; WRITE DMA EXT
; fall through to ide_read_write
proc ide_read_write stdcall uses esi edi ebx, \
hd_data, buffer, startsector:qword, numsectors
; hd_data = pointer to hd*_data
; buffer = pointer to buffer for data
; buffer = pointer to buffer with/for data
; startsector = 64-bit start sector
; numsectors = pointer to number of sectors on input,
; must be filled with number of sectors really read
; must be filled with number of sectors really read/written
locals
sectors_todo dd ?
channel_lock dd ?
operation db ?
endl
mov [operation], al
; get number of requested sectors and say that no sectors were read yet
mov ecx, [numsectors]
mov eax, [ecx]
@ -108,96 +118,8 @@ endl
mov ax, word [startsector+4]
mov [sector+4], ax
mov esi, [buffer]
mov bl, 25h ; READ DMA EXT
mov ecx, [hdpos]
dec ecx
shr ecx, 2
imul ecx, sizeof.IDE_DATA
add ecx, IDE_controller_1
mov [IDE_controller_pointer], ecx
mov eax, [hdpos]
dec eax
and eax, 11b
shr eax, 1
add eax, ecx
cmp [eax+IDE_DATA.dma_hdd_channel_1], 1
jz .next
dec bl ; READ SECTOR(S) EXT
mov edi, esi
; worker procedures take max 8000h sectors per time
; loop until all sectors will be processed
.next:
mov ecx, 8000h
cmp ecx, [sectors_todo]
jbe @f
mov ecx, [sectors_todo]
@@:
mov [blockSize], ecx
push ecx
call IDE_transfer
pop ecx
jc .out
mov eax, [numsectors]
add [eax], ecx
sub [sectors_todo], ecx
jz .out
add [sector], ecx
adc word [sector+4], 0
jmp .next
; loop is done, either due to error or because everything is done
; release the global lock and return the corresponding status
.out:
sbb eax, eax
push eax
mov ecx, [channel_lock]
call mutex_unlock
mov ecx, ide_mutex
call mutex_unlock
pop eax
ret
endp
;-----------------------------------------------------------------
proc ide_write stdcall uses esi edi ebx, \
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
; 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
; acquire the global lock
mov ecx, ide_mutex
call mutex_lock
mov ecx, [hd_data]
mov ecx, [ecx+HD_DATA.hdpos]
dec ecx
shr ecx, 1
shl ecx, 2
mov ecx, [ecx + ide_mutex_table]
mov [channel_lock], ecx
call mutex_lock
; prepare worker procedures variables
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 [sector], eax
mov ax, word [startsector+4]
mov [sector+4], ax
mov esi, [buffer]
mov bl, 35h ; WRITE DMA EXT
mov bl, [operation]
mov ecx, [hdpos]
dec ecx
shr ecx, 2
@ -211,7 +133,7 @@ endl
add eax, ecx
cmp [eax+IDE_DATA.dma_hdd_channel_1], 1
jz .next
dec bl ; WRITE SECTOR(S) EXT
dec ebx ; READ/WRITE SECTOR(S) EXT
; worker procedures take max 8000h sectors per time
; loop until all sectors will be processed
.next: