123 lines
3.7 KiB
PHP
123 lines
3.7 KiB
PHP
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
|
;; ;;
|
||
|
|
;; Copyright (C) KolibriOS team 2008-2015. All rights reserved. ;;
|
||
|
|
;; Distributed under terms of the GNU General Public License ;;
|
||
|
|
;; ;;
|
||
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
|
|
||
|
|
$Revision$
|
||
|
|
|
||
|
|
|
||
|
|
; 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
|
||
|
|
mov di, BOOT_LO.bios_hd
|
||
|
|
mov byte [es:di-1], cl
|
||
|
|
cmp [preboot_biosdisk], 1
|
||
|
|
jnz bdde
|
||
|
|
mov dl, 80h
|
||
|
|
bdds:
|
||
|
|
mov ah, 15h
|
||
|
|
push cx dx di
|
||
|
|
int 13h
|
||
|
|
pop di dx cx
|
||
|
|
jc bddc
|
||
|
|
test ah, ah
|
||
|
|
jz bddc
|
||
|
|
inc cx
|
||
|
|
; We are going to call int 13h/func 48h, Extended get drive parameters.
|
||
|
|
; The latest version of the EDD specification is 3.0.
|
||
|
|
; There are two slightly incompatible variants for version 3.0;
|
||
|
|
; original one from Phoenix in 1998, see e.g.
|
||
|
|
; http://www.t10.org/t13/technical/d98120r0.pdf, and T13 draft,
|
||
|
|
; http://www.t13.org/documents/UploadedDocuments/docs2004/d1572r3-EDD3.pdf
|
||
|
|
; T13 draft addresses more possible buses, so it gives additional 8 bytes
|
||
|
|
; for device path.
|
||
|
|
; Most BIOSes follow Phoenix, but T13 version is also known to be used
|
||
|
|
; (e.g. systems based on AMD Geode).
|
||
|
|
; Fortunately, there is an in/out length field, so
|
||
|
|
; it is easy to tell what variant was selected by the BIOS:
|
||
|
|
; Phoenix-3.0 has 42h bytes, T13-3.0 has 4Ah bytes.
|
||
|
|
; Note that 2.0 has 1Eh bytes, 1.1 has 1Ah bytes; both variants of 3.0 have
|
||
|
|
; the same structure for first 1Eh bytes, compatible with previous versions.
|
||
|
|
; Note also that difference between Phoenix-3.0 and T13-3.0 starts near the
|
||
|
|
; end of the structure, so the current code doesn't even need to distinguish.
|
||
|
|
; It needs, however, give at least 4Ah bytes as input and expect that BIOS
|
||
|
|
; could return 42h bytes as output while still giving all the information.
|
||
|
|
mov ah, 48h
|
||
|
|
push ds
|
||
|
|
push es
|
||
|
|
pop ds
|
||
|
|
mov si, 0xA000
|
||
|
|
mov word [si], 4Ah
|
||
|
|
mov ah, 48h
|
||
|
|
int 13h
|
||
|
|
pop ds
|
||
|
|
jc bddc2
|
||
|
|
cmp word [es:si], 1Eh
|
||
|
|
jb .noide
|
||
|
|
cmp word [es:si+1Ah], 0xFFFF
|
||
|
|
jz .noide
|
||
|
|
inc byte [es:BOOT_LO.bios_hd_cnt]
|
||
|
|
mov al, dl
|
||
|
|
stosb
|
||
|
|
push ds
|
||
|
|
push si
|
||
|
|
lds si, [es:si+1Ah]
|
||
|
|
mov al, [si+6]
|
||
|
|
and al, 0xF
|
||
|
|
stosb
|
||
|
|
mov al, byte [si+4]
|
||
|
|
shr al, 4
|
||
|
|
and ax, 1
|
||
|
|
cmp word [si], 1F0h
|
||
|
|
jz @f
|
||
|
|
inc ax
|
||
|
|
inc ax
|
||
|
|
cmp word [si], 170h
|
||
|
|
jz @f
|
||
|
|
or ax, -1
|
||
|
|
; mov ax, -1
|
||
|
|
@@:
|
||
|
|
stosw
|
||
|
|
pop si
|
||
|
|
pop ds
|
||
|
|
jmp bddc3
|
||
|
|
.noide:
|
||
|
|
cmp word [es:si], 42h
|
||
|
|
jb .nousb
|
||
|
|
cmp word [es:si+28h], 'US'
|
||
|
|
jnz .nousb
|
||
|
|
cmp byte [es:si+2Ah], 'B'
|
||
|
|
jz bddc2
|
||
|
|
.nousb:
|
||
|
|
inc byte [es:BOOT_LO.bios_hd_cnt]
|
||
|
|
mov al, dl
|
||
|
|
stosb
|
||
|
|
xor ax, ax
|
||
|
|
stosb
|
||
|
|
dec ax
|
||
|
|
stosw
|
||
|
|
; mov al, 0
|
||
|
|
; 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
|
||
|
|
bddc:
|
||
|
|
inc dl
|
||
|
|
jnz bdds
|
||
|
|
bdde:
|