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Return capacity and bytes per sector of bios disks

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This patch makes bd_querymedia return valid Capacity and SectorSize
values. Bios disks detection code saves the values to extended
BiosDiskData structure, bd_querymedia copies them to DISKMEDIAINFO.


git-svn-id: svn://kolibrios.org@6843 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Ivan B
2017-01-21 00:14:05 +00:00
parent 26611cadd0
commit dbe9918dc6
5 changed files with 36 additions and 10 deletions
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28
kernel/trunk/blkdev/bd_drv.inc
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@@ -31,6 +31,14 @@ int13_regs_in rb sizeof.v86_regs
int13_regs_out rb sizeof.v86_regs
cache_chain_size db ?
endg
struct BiosDiskData
DriveNumber db ?
IRQ db ?
ATADEVbit dw ?
SectorSize dd ?
Capacity dq ?
ends
;-----------------------------------------------------------------
proc bd_read_interface stdcall uses edi, \
userdata, buffer, startsector:qword, numsectors
@@ -152,13 +160,18 @@ endl
ret
endp
;-----------------------------------------------------------------
; This is a stub.
proc bd_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
mov edx, [mediainfo]
mov eax, [hd_data]
lea eax, [(eax-80h)*4]
lea eax, [BiosDisksData+eax*4]
mov [edx+DISKMEDIAINFO.Flags], 0
mov ecx, [eax+BiosDiskData.SectorSize]
mov [edx+DISKMEDIAINFO.SectorSize], ecx
mov ecx, dword [eax+BiosDiskData.Capacity+0]
mov eax, dword [eax+BiosDiskData.Capacity+4]
mov dword [edx+DISKMEDIAINFO.Capacity+0], ecx
mov dword [edx+DISKMEDIAINFO.Capacity+4], eax
xor eax, eax
ret
endp
@@ -253,7 +266,8 @@ int13_call:
rep stosd
mov byte [ebx+v86_regs.eax+1], dl
mov eax, [hdpos]
lea eax, [BiosDisksData+(eax-80h)*4]
lea eax, [(eax-80h)*4]
lea eax, [BiosDisksData+eax*4]
mov dl, [eax]
mov byte [ebx+v86_regs.edx], dl
movzx edx, byte [eax+1]