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: 7132 $
 
 
; 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:

Rev 7122	Rev 7132
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2	;; ;;	2	;; ;;
3	;; Copyright (C) KolibriOS team 2008-2015. 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: 7122 $	8	$Revision: 7132 $
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	; Read the number of sectors, bytes per sector. dunkaist, 2017	14	; Read the number of sectors, bytes per sector. dunkaist, 2017
15		15
16	xor cx, cx	16	xor cx, cx
17	mov es, cx	17	mov es, cx
18	mov di, BOOT_BIOS_HD	18	mov di, BOOT_LO.bios_hd
19	mov byte [es:di-1], cl	19	mov byte [es:di-1], cl
20	cmp [preboot_biosdisk], 1	20	cmp [preboot_biosdisk], 1
21	jnz bdde	21	jnz bdde
22	mov dl, 80h	22	mov dl, 80h
23	bdds:	23	bdds:
24	mov ah, 15h	24	mov ah, 15h
25	push cx dx di	25	push cx dx di
26	int 13h	26	int 13h
27	pop di dx cx	27	pop di dx cx
28	jc bddc	28	jc bddc
29	test ah, ah	29	test ah, ah
30	jz bddc	30	jz bddc
31	inc cx	31	inc cx
32	; We are going to call int 13h/func 48h, Extended get drive parameters.	32	; We are going to call int 13h/func 48h, Extended get drive parameters.
33	; The latest version of the EDD specification is 3.0.	33	; The latest version of the EDD specification is 3.0.
34	; There are two slightly incompatible variants for version 3.0;	34	; There are two slightly incompatible variants for version 3.0;
35	; original one from Phoenix in 1998, see e.g.	35	; original one from Phoenix in 1998, see e.g.
36	; http://www.t10.org/t13/technical/d98120r0.pdf, and T13 draft,	36	; http://www.t10.org/t13/technical/d98120r0.pdf, and T13 draft,
37	; http://www.t13.org/documents/UploadedDocuments/docs2004/d1572r3-EDD3.pdf	37	; http://www.t13.org/documents/UploadedDocuments/docs2004/d1572r3-EDD3.pdf
38	; T13 draft addresses more possible buses, so it gives additional 8 bytes	38	; T13 draft addresses more possible buses, so it gives additional 8 bytes
39	; for device path.	39	; for device path.
40	; Most BIOSes follow Phoenix, but T13 version is also known to be used	40	; Most BIOSes follow Phoenix, but T13 version is also known to be used
41	; (e.g. systems based on AMD Geode).	41	; (e.g. systems based on AMD Geode).
42	; Fortunately, there is an in/out length field, so	42	; Fortunately, there is an in/out length field, so
43	; it is easy to tell what variant was selected by the BIOS:	43	; it is easy to tell what variant was selected by the BIOS:
44	; Phoenix-3.0 has 42h bytes, T13-3.0 has 4Ah bytes.	44	; Phoenix-3.0 has 42h bytes, T13-3.0 has 4Ah bytes.
45	; Note that 2.0 has 1Eh bytes, 1.1 has 1Ah bytes; both variants of 3.0 have	45	; Note that 2.0 has 1Eh bytes, 1.1 has 1Ah bytes; both variants of 3.0 have
46	; the same structure for first 1Eh bytes, compatible with previous versions.	46	; the same structure for first 1Eh bytes, compatible with previous versions.
47	; Note also that difference between Phoenix-3.0 and T13-3.0 starts near the	47	; Note also that difference between Phoenix-3.0 and T13-3.0 starts near the
48	; end of the structure, so the current code doesn't even need to distinguish.	48	; end of the structure, so the current code doesn't even need to distinguish.
49	; It needs, however, give at least 4Ah bytes as input and expect that BIOS	49	; It needs, however, give at least 4Ah bytes as input and expect that BIOS
50	; could return 42h bytes as output while still giving all the information.	50	; could return 42h bytes as output while still giving all the information.
51	mov ah, 48h	51	mov ah, 48h
52	push ds	52	push ds
53	push es	53	push es
54	pop ds	54	pop ds
55	mov si, 0xA000	55	mov si, 0xA000
56	mov word [si], 4Ah	56	mov word [si], 4Ah
57	mov ah, 48h	57	mov ah, 48h
58	int 13h	58	int 13h
59	pop ds	59	pop ds
60	jc bddc2	60	jc bddc2
61	cmp word [es:si], 1Eh	61	cmp word [es:si], 1Eh
62	jb .noide	62	jb .noide
63	cmp word [es:si+1Ah], 0xFFFF	63	cmp word [es:si+1Ah], 0xFFFF
64	jz .noide	64	jz .noide
65	inc byte [es:BOOT_BIOS_HD_CNT]	65	inc byte [es:BOOT_LO.bios_hd_cnt]
66	mov al, dl	66	mov al, dl
67	stosb	67	stosb
68	push ds	68	push ds
69	push si	69	push si
70	lds si, [es:si+1Ah]	70	lds si, [es:si+1Ah]
71	mov al, [si+6]	71	mov al, [si+6]
72	and al, 0xF	72	and al, 0xF
73	stosb	73	stosb
74	mov al, byte [si+4]	74	mov al, byte [si+4]
75	shr al, 4	75	shr al, 4
76	and ax, 1	76	and ax, 1
77	cmp word [si], 1F0h	77	cmp word [si], 1F0h
78	jz @f	78	jz @f
79	inc ax	79	inc ax
80	inc ax	80	inc ax
81	cmp word [si], 170h	81	cmp word [si], 170h
82	jz @f	82	jz @f
83	or ax, -1	83	or ax, -1
84	; mov ax, -1	84	; mov ax, -1
85	@@:	85	@@:
86	stosw	86	stosw
87	pop si	87	pop si
88	pop ds	88	pop ds
89	jmp bddc3	89	jmp bddc3
90	.noide:	90	.noide:
91	cmp word [es:si], 42h	91	cmp word [es:si], 42h
92	jb .nousb	92	jb .nousb
93	cmp word [es:si+28h], 'US'	93	cmp word [es:si+28h], 'US'
94	jnz .nousb	94	jnz .nousb
95	cmp byte [es:si+2Ah], 'B'	95	cmp byte [es:si+2Ah], 'B'
96	jz bddc2	96	jz bddc2
97	.nousb:	97	.nousb:
98	inc byte [es:BOOT_BIOS_HD_CNT]	98	inc byte [es:BOOT_LO.bios_hd_cnt]
99	mov al, dl	99	mov al, dl
100	stosb	100	stosb
101	xor ax, ax	101	xor ax, ax
102	stosb	102	stosb
103	dec ax	103	dec ax
104	stosw	104	stosw
105	; mov al, 0	105	; mov al, 0
106	; stosb	106	; stosb
107	; mov ax, -1	107	; mov ax, -1
108	; stosw	108	; stosw
109	bddc3:	109	bddc3:
110	movzx eax, word[es:si+24]	110	movzx eax, word[es:si+24]
111	stosd	111	stosd
112	mov eax, [es:si+16]	112	mov eax, [es:si+16]
113	stosd	113	stosd
114	mov eax, [es:si+20]	114	mov eax, [es:si+20]
115	stosd	115	stosd
116	bddc2:	116	bddc2:
117	cmp cl, [es:0x475]	117	cmp cl, [es:0x475]
118	jae bdde	118	jae bdde
119	bddc:	119	bddc:
120	inc dl	120	inc dl
121	jnz bdds	121	jnz bdds
122	bdde:	122	bdde:

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(root)/kernel/trunk/detect/biosdisk.inc – Rev 7122 → 7132