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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 Baravy 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
View File

@ -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]

2
kernel/trunk/data32.inc
View File

@ -454,7 +454,7 @@ lba_read_enabled dd ? ; 0 = disabled , 1 = enabled
pci_access_enabled dd ? ; 0 = disabled , 1 = enabled
NumBiosDisks dd ?
BiosDisksData rb 200h
BiosDisksData rb 200h ; struct BiosDiskData
BiosDiskCaches rb 80h*(cache_ide1-cache_ide0)
BiosDiskPartitions rd 80h

12
kernel/trunk/detect/biosdisk.inc
View File

@ -11,6 +11,7 @@ $Revision$
; Detect all BIOS hard drives.
; diamond, 2008
; Do not include USB mass storages. CleverMouse, 2013
; Read the number of sectors, bytes per sector. dunkaist, 2017
xor cx, cx
mov es, cx
@ -65,6 +66,7 @@ bdds:
mov al, dl
stosb
push ds
push si
lds si, [es:si+1Ah]
mov al, [si+6]
and al, 0xF
@ -82,8 +84,9 @@ bdds:
; mov ax, -1
@@:
stosw
pop si
pop ds
jmp bddc2
jmp bddc3
.noide:
cmp word [es:si], 42h
jb .nousb
@ -103,6 +106,13 @@ bdds:
; stosb
; mov ax, -1
; stosw
bddc3:
movzx eax, word[es:si+24]
stosd
mov eax, [es:si+16]
stosd
mov eax, [es:si+20]
stosd
bddc2:
cmp cl, [es:0x475]
jae bdde

3
kernel/trunk/detect/sear_par.inc
View File

@ -216,7 +216,8 @@ search_partitions:
push 'bd'
.bdloop:
; 3b. Get the drive number for using in /bd* name.
movzx eax, byte [BiosDisksData+esi*4]
lea eax, [esi*4]
movzx eax, [BiosDisksData+eax*4+BiosDiskData.DriveNumber]
sub al, 80h
; 3c. Convert eax to decimal and store starting with [esp+3].
; First 2 bytes in [esp] are "bd".

1
kernel/trunk/kernel.asm
View File

@ -451,6 +451,7 @@ high_code:
movzx ecx, byte [esi-1]
mov [NumBiosDisks], ecx
mov edi, BiosDisksData
shl ecx, 2
rep movsd
; -------- Fast System Call init ----------