WebSVN – Kolibri OS – Diff – /kernel/trunk/detect/biosdisk.inc


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;;                                                              ;;
;; Copyright (C) KolibriOS team 2008-2015. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License    ;;
;;                                                              ;;
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$Revision: 5363 $
 
 
; Detect all BIOS hard drives.
; diamond, 2008
; Do not include USB mass storages. CleverMouse, 2013
 
        xor     cx, cx
        mov     es, cx
        mov     di, 0x9080
        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:0x907F]
        mov     al, dl
        stosb
        push    ds
        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     ds
        jmp     bddc2
.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:0x907F]
        mov     al, dl
        stosb
        xor     ax, ax
        stosb
        dec     ax
        stosw
;        mov     al, 0
;        stosb
;        mov     ax, -1
;        stosw
bddc2:
        cmp     cl, [es:0x475]
        jae     bdde
bddc:
        inc     dl
        jnz     bdds
bdde:

Rev 4850	Rev 5363
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2	;; ;;	2	;; ;;
3	;; Copyright (C) KolibriOS team 2008-2014. All rights reserved. ;;	3	;; Copyright (C) KolibriOS team 2008-2015. All rights reserved. ;;
4	;; Distributed under terms of the GNU General Public License ;;	4	;; Distributed under terms of the GNU General Public License ;;
5	;; ;;	5	;; ;;
6	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;	6	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
7		7
8	$Revision: 4850 $	8	$Revision: 5363 $
9		9
10		10
11	; Detect all BIOS hard drives.	11	; Detect all BIOS hard drives.
12	; diamond, 2008	12	; diamond, 2008
13	; Do not include USB mass storages. CleverMouse, 2013	13	; Do not include USB mass storages. CleverMouse, 2013
14		14
15	xor cx, cx	15	xor cx, cx
16	mov es, cx	16	mov es, cx
17	mov di, 0x9080	17	mov di, 0x9080
18	mov byte [es:di-1], cl	18	mov byte [es:di-1], cl
19	cmp [preboot_biosdisk], 1	19	cmp [preboot_biosdisk], 1
20	jnz bdde	20	jnz bdde
21	mov dl, 80h	21	mov dl, 80h
22	bdds:	22	bdds:
23	mov ah, 15h	23	mov ah, 15h
24	push cx dx di	24	push cx dx di
25	int 13h	25	int 13h
26	pop di dx cx	26	pop di dx cx
27	jc bddc	27	jc bddc
28	test ah, ah	28	test ah, ah
29	jz bddc	29	jz bddc
30	inc cx	30	inc cx
31	; We are going to call int 13h/func 48h, Extended get drive parameters.	31	; We are going to call int 13h/func 48h, Extended get drive parameters.
32	; The latest version of the EDD specification is 3.0.	32	; The latest version of the EDD specification is 3.0.
33	; There are two slightly incompatible variants for version 3.0;	33	; There are two slightly incompatible variants for version 3.0;
34	; original one from Phoenix in 1998, see e.g.	34	; original one from Phoenix in 1998, see e.g.
35	; http://www.t10.org/t13/technical/d98120r0.pdf, and T13 draft,	35	; http://www.t10.org/t13/technical/d98120r0.pdf, and T13 draft,
36	; http://www.t13.org/documents/UploadedDocuments/docs2004/d1572r3-EDD3.pdf	36	; http://www.t13.org/documents/UploadedDocuments/docs2004/d1572r3-EDD3.pdf
37	; T13 draft addresses more possible buses, so it gives additional 8 bytes	37	; T13 draft addresses more possible buses, so it gives additional 8 bytes
38	; for device path.	38	; for device path.
39	; Most BIOSes follow Phoenix, but T13 version is also known to be used	39	; Most BIOSes follow Phoenix, but T13 version is also known to be used
40	; (e.g. systems based on AMD Geode).	40	; (e.g. systems based on AMD Geode).
41	; Fortunately, there is an in/out length field, so	41	; Fortunately, there is an in/out length field, so
42	; it is easy to tell what variant was selected by the BIOS:	42	; it is easy to tell what variant was selected by the BIOS:
43	; Phoenix-3.0 has 42h bytes, T13-3.0 has 4Ah bytes.	43	; Phoenix-3.0 has 42h bytes, T13-3.0 has 4Ah bytes.
44	; Note that 2.0 has 1Eh bytes, 1.1 has 1Ah bytes; both variants of 3.0 have	44	; Note that 2.0 has 1Eh bytes, 1.1 has 1Ah bytes; both variants of 3.0 have
45	; the same structure for first 1Eh bytes, compatible with previous versions.	45	; the same structure for first 1Eh bytes, compatible with previous versions.
46	; Note also that difference between Phoenix-3.0 and T13-3.0 starts near the	46	; Note also that difference between Phoenix-3.0 and T13-3.0 starts near the
47	; end of the structure, so the current code doesn't even need to distinguish.	47	; end of the structure, so the current code doesn't even need to distinguish.
48	; It needs, however, give at least 4Ah bytes as input and expect that BIOS	48	; It needs, however, give at least 4Ah bytes as input and expect that BIOS
49	; could return 42h bytes as output while still giving all the information.	49	; could return 42h bytes as output while still giving all the information.
50	mov ah, 48h	50	mov ah, 48h
51	push ds	51	push ds
52	push es	52	push es
53	pop ds	53	pop ds
54	mov si, 0xA000	54	mov si, 0xA000
55	mov word [si], 4Ah	55	mov word [si], 4Ah
56	mov ah, 48h	56	mov ah, 48h
57	int 13h	57	int 13h
58	pop ds	58	pop ds
59	jc bddc2	59	jc bddc2
60	cmp word [es:si], 1Eh	60	cmp word [es:si], 1Eh
61	jb .noide	61	jb .noide
62	cmp word [es:si+1Ah], 0xFFFF	62	cmp word [es:si+1Ah], 0xFFFF
63	jz .noide	63	jz .noide
64	inc byte [es:0x907F]	64	inc byte [es:0x907F]
65	mov al, dl	65	mov al, dl
66	stosb	66	stosb
67	push ds	67	push ds
68	lds si, [es:si+1Ah]	68	lds si, [es:si+1Ah]
69	mov al, [si+6]	69	mov al, [si+6]
70	and al, 0xF	70	and al, 0xF
71	stosb	71	stosb
72	mov al, byte [si+4]	72	mov al, byte [si+4]
73	shr al, 4	73	shr al, 4
74	and ax, 1	74	and ax, 1
75	cmp word [si], 1F0h	75	cmp word [si], 1F0h
76	jz @f	76	jz @f
77	inc ax	77	inc ax
78	inc ax	78	inc ax
79	cmp word [si], 170h	79	cmp word [si], 170h
80	jz @f	80	jz @f
81	or ax, -1	81	or ax, -1
82	; mov ax, -1	82	; mov ax, -1
83	@@:	83	@@:
84	stosw	84	stosw
85	pop ds	85	pop ds
86	jmp bddc2	86	jmp bddc2
87	.noide:	87	.noide:
88	cmp word [es:si], 42h	88	cmp word [es:si], 42h
89	jb .nousb	89	jb .nousb
90	cmp word [es:si+28h], 'US'	90	cmp word [es:si+28h], 'US'
91	jnz .nousb	91	jnz .nousb
92	cmp byte [es:si+2Ah], 'B'	92	cmp byte [es:si+2Ah], 'B'
93	jz bddc2	93	jz bddc2
94	.nousb:	94	.nousb:
95	inc byte [es:0x907F]	95	inc byte [es:0x907F]
96	mov al, dl	96	mov al, dl
97	stosb	97	stosb
98	xor ax, ax	98	xor ax, ax
99	stosb	99	stosb
100	dec ax	100	dec ax
101	stosw	101	stosw
102	; mov al, 0	102	; mov al, 0
103	; stosb	103	; stosb
104	; mov ax, -1	104	; mov ax, -1
105	; stosw	105	; stosw
106	bddc2:	106	bddc2:
107	cmp cl, [es:0x475]	107	cmp cl, [es:0x475]
108	jae bdde	108	jae bdde
109	bddc:	109	bddc:
110	inc dl	110	inc dl
111	jnz bdds	111	jnz bdds
112	bdde:	112	bdde:

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(root)/kernel/trunk/detect/biosdisk.inc – Rev 4850 → 5363