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make caching for PnP disks really work

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git-svn-id: svn://kolibrios.org@3164 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
CleverMouse 2013-01-14 09:24:25 +00:00
parent edb957dfa2
commit de94fe74ac
2 changed files with 25 additions and 8 deletions
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4
kernel/trunk/blkdev/disk.inc
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@ -626,8 +626,8 @@ disk_default_flush:
; The default implementation of DISKFUNC.adjust_cache_size.
disk_default_adjust_cache_size:
mov eax, [esp+4]
ret 4
mov eax, [esp+8]
ret 8
; This is an internal function called from 'disk_media_changed' when a new media
; is detected. It creates the list of partitions for the media.

29
kernel/trunk/blkdev/disk_cache.inc
View File

@ -135,7 +135,7 @@ end virtual
push esp
push edx
push [.sector_lo+12]
mov ecx, [.cache]
mov ecx, [.cache+16]
mov eax, edi
shl eax, 9
add eax, [ecx+DISKCACHE.data]
@ -317,7 +317,7 @@ end virtual
.yes_in_cache_write:
mov dword [esi+4], 2 ; write - differs from hd
mov dword [esi+8], 2 ; write - differs from hd
shl edi, 9
mov ecx, [.cache]
@ -373,11 +373,12 @@ find_empty_slot64:
; This function is intended to replace the old 'write_cache' function.
proc write_cache64 uses ecx edx esi edi, disk:dword
locals
cache_chain_started dd ?
cache_chain_started dd 0
cache_chain_size dd ?
cache_chain_pos dd ?
cache_chain_ptr dd ?
endl
saved_esi_pos = 16+12 ; size of local variables + size of registers before esi
; If there is no cache for this disk, nothing to do.
cmp [esi+DISKCACHE.pointer], 0
jz .flush
@ -465,7 +466,7 @@ endl
.write_cache_chain:
pusha
mov edi, [cache_chain_pos]
mov ecx, [ebp-12]
mov ecx, [ebp-saved_esi_pos]
shl edi, 9
add edi, [ecx+DISKCACHE.data]
mov ecx, [cache_chain_size]
@ -549,7 +550,7 @@ disk_init_cache:
mov eax, [esi+DISK.SysCache.data_size]
push ebx
call calculate_for_hd
call calculate_for_hd64
pop ebx
add eax, [esi+DISK.SysCache.pointer]
mov [esi+DISK.SysCache.data], eax
@ -564,7 +565,7 @@ disk_init_cache:
mov eax, [esi+DISK.AppCache.data_size]
push ebx
call calculate_for_hd
call calculate_for_hd64
pop ebx
add eax, [esi+DISK.AppCache.pointer]
mov [esi+DISK.AppCache.data], eax
@ -590,6 +591,22 @@ disk_init_cache:
mov al, 1
ret
calculate_for_hd64:
push eax
mov ebx, eax
shr eax, 9
lea eax, [eax*3]
shl eax, 2
sub ebx, eax
shr ebx, 9
mov ecx, ebx
shl ebx, 9
pop eax
sub eax, ebx
dec ecx
ret
; This internal function is called from disk_media_dereference to free the
; allocated cache, if there is one.
; esi = pointer to DISK structure