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The universal cache of IDE devices.

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Step 1:
1) Allocate of separate area for everyone IDE device.
2) Usage of the allocated areas for HDD. (Cache CD\DVD - not realized, but the memory for it is allocated. This be realized  in step 2).
3) The area of memory 0x80300000 - > 0x80400000 now is free and is not used.
4) The area of memory 0x80284000 - > 0x8028BFFF is used for HDD DMA.

git-svn-id: svn://kolibrios.org@580 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Marat Zakiyanov (Mario79)
2007-07-15 23:22:14 +00:00
parent 5f63bc470b
commit b229fdc2c2
8 changed files with 981 additions and 189 deletions
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262
kernel/trunk/blkdev/hd_drv.inc
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@@ -9,20 +9,6 @@ $Revision$
; Low-level driver for HDD access
; DMA support by Mario79
;**************************************************************************
;
; 0x600008 - 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 )
;
; +65536 - cache entries
;
;**************************************************************************
align 4
hd_read:
;-----------------------------------------------------------
@@ -32,8 +18,11 @@ hd_read:
and [hd_error], 0
push ecx esi edi ; scan cache
mov ecx,cache_max ; entries in cache
mov esi,HD_CACHE+8
; mov ecx,cache_max ; entries in cache
; mov esi,HD_CACHE+8
call calculate_cache
add esi,8
mov edi,1
hdreadcache:
@@ -64,8 +53,12 @@ hd_read:
.nodma:
call hd_read_pio
@@:
; lea esi,[edi*8+HD_CACHE]
; push eax
call calculate_cache_1
lea esi,[edi*8+esi]
; pop eax
lea esi,[edi*8+HD_CACHE]
mov [esi],eax ; sector number
mov dword [esi+4],1 ; hd read - mark as same as in hd
@@ -73,7 +66,12 @@ hd_read:
mov esi,edi
shl esi,9
add esi,HD_CACHE+65536
; add esi,HD_CACHE+65536
push eax
call calculate_cache_2
add esi,eax
pop eax
mov edi,ebx
mov ecx,512/4
cld
@@ -126,7 +124,12 @@ hd_read_pio:
cli
push edi
shl edi,9
add edi,HD_CACHE+65536
; add edi,HD_CACHE+65536
push eax
call calculate_cache_2
add edi,eax
pop eax
mov ecx,256
mov edx,[hdbase]
cld
@@ -163,8 +166,11 @@ hd_write:
; check if the cache already has the sector and overwrite it
mov ecx,cache_max
mov esi,HD_CACHE+8
; mov ecx,cache_max
; mov esi,HD_CACHE+8
call calculate_cache
add esi,8
mov edi,1
hdwritecache:
@@ -189,7 +195,12 @@ hd_write:
cmp [hd_error],0
jne hd_write_access_denied
lea esi,[edi*8+HD_CACHE]
; 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:
@@ -197,7 +208,12 @@ hd_write:
mov dword [esi+4],2 ; write - differs from hd
shl edi,9
add edi,HD_CACHE+65536
; add edi,HD_CACHE+65536
push eax
call calculate_cache_2
add edi,eax
pop eax
mov esi,ebx
mov ecx,512/4
cld
@@ -206,98 +222,15 @@ hd_write:
pop edi esi ecx
ret
write_cache:
;-----------------------------------------------------------
; write all changed sectors to disk
;-----------------------------------------------------------
push eax ecx edx esi edi
; write difference ( 2 ) from cache to hd
mov ecx,cache_max
mov esi,HD_CACHE+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
; 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], 64
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
cache_write_pio:
call disable_ide_int
; call disable_ide_int
call wait_for_hd_idle
cmp [hd_error],0
jne hd_write_error
; cli
cli
xor eax,eax
mov edx,[hdbase]
inc edx
@@ -323,7 +256,7 @@ cache_write_pio:
inc edx
mov al,30h
out dx,al
; sti
sti
call wait_for_sector_buffer
@@ -332,75 +265,26 @@ cache_write_pio:
push ecx esi
; cli
cli
mov esi,edi
shl esi,9
add esi,HD_CACHE+65536 ; esi = from memory position
; 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
sti
call enable_ide_int
; call enable_ide_int
pop esi ecx
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:
mov ecx,cache_max*10/100
mov edi,[cache_search_start]
search_for_empty:
inc edi
cmp edi,cache_max
jbe inside_cache
mov edi,1
inside_cache:
cmp dword [edi*8+HD_CACHE+4],2 ; get cache slot info
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:
mov [cache_search_start],edi
found_slot_access_denied:
ret
align 4
clear_hd_cache:
push eax ecx edi
mov edi, HD_CACHE
mov ecx,16384
xor eax,eax
cld
rep stosd ; clear hd cache with 0
mov [cache_search_start],eax
mov [fat_in_cache],-1
mov [fat_change],0
pop edi ecx eax
ret
save_hd_wait_timeout:
push eax
@@ -684,7 +568,12 @@ hd_read_dma:
push ecx esi edi
mov esi, eax
shl edi, 9
add edi, HD_CACHE+0x10000
; add edi, HD_CACHE+0x10000
push eax
call calculate_cache_2
add edi,eax
pop eax
mov ecx, 512/4
cld
rep movsd
@@ -774,26 +663,27 @@ hd_read_dma:
jmp hd_read_dma
align 4
write_cache_chain:
push esi
mov eax, IDE_descriptor_table
mov edx, [cache_chain_pos]
shl edx, 9
add edx, DMA_HD_MEM+0x10000
mov [eax], edx
movzx edx, [cache_chain_size]
shl edx, 9
mov [eax+4], dx
jmp do_write_dma
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, edi
shl edx, 9
add edx, DMA_HD_MEM+0x10000
mov [eax], edx
mov word [eax+4], 0x200
do_write_dma:
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