WebSVN – Kolibri OS – Blame – /kernel/trunk/sec_loader/trunk/loader.asm

Rev	Author	Line No.	Line
2288	clevermous	1	; Copyright (c) 2008-2009,
		2	; All rights reserved.
		3	;
		4	; Redistribution and use in source and binary forms, with or without
		5	; modification, are permitted provided that the following conditions are met:
		6	; * Redistributions of source code must retain the above copyright
		7	; notice, this list of conditions and the following disclaimer.
		8	; * Redistributions in binary form must reproduce the above copyright
		9	; notice, this list of conditions and the following disclaimer in the
		10	; documentation and/or other materials provided with the distribution.
		11	; * Neither the name of the nor the
		12	; names of its contributors may be used to endorse or promote products
		13	; derived from this software without specific prior written permission.
		14	;
		15	; THIS SOFTWARE IS PROVIDED BY Alexey Teplov nickname ''AS IS'' AND ANY
		16	; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
		17	; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
		18	; DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY
		19	; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
		20	; (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
		21	; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
		22	; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		23	; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
		24	; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		25	;*****************************************************************************
		26
		27	;start of the project 13.02.2008 year.
		28	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		29	;Secondary Loader copyright Alexey Teplov nickname
		30	;if you need log preproc
		31	;/////////////
		32	;include 'listing.inc'
		33	;enable listing
		34	;////////////
		35	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		36	;start of code: ;
		37	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		38	use16
		39	org 0x0
		40	jmp start
3539	clevermous	41	include 'sl_equ.inc' ; в файле размещены все equ предопределения
2288	clevermous	42	include 'boot_st.inc'
		43	include 'debug_msg.inc' ;here is message from debug
		44	include 'parse_dat.inc'
		45	include 'sl_proc.inc'
		46	include 'parse.inc'
		47	include 'parse_loader.inc'
		48	include 'parse_any.inc'
		49	include 'parse_def_sect.inc'
		50	include 'parse_err.inc'
		51
3539	clevermous	52	file_data dw 0x0,ini_data_ ;формат: смещение: сегмент т.к. используется les
		53	size_data dw 16 ;16 блоков по 4 кб т.е предел до 64 кб
2288	clevermous	54	name_ini_f db 'kord/startos.ini',0
		55
		56	;////////////
		57	loader_callback dd ?
		58	load_drive dw ?
		59	load_ft dw ?
		60	;Start code
		61
		62	start:
		63	; Save far pointer to callback procedure, ds:si is point
		64	mov word [cs:loader_callback], si
		65	mov word [cs:loader_callback+2], ds
		66	; Save type of drive
		67	mov word [cs:load_drive], ax
		68	; Save type of FT
		69	mov word [cs:load_ft], bx
		70	; set up stack
		71	mov ax, cs
		72	mov ss, ax
		73	xor sp, sp
		74	; set up segment registers
		75	mov ds, ax
		76	mov es, ax
		77	; just to be sure: force DF=0, IF=1
		78	cld
		79	sti
		80
		81	; set videomode
		82	mov ax, 3
		83	int 0x10
		84
		85	mov si, version
		86	call printplain
		87	mov al, '#'
		88	mov cx, 80
3539	clevermous	89	;input cx=size al=char будет вывден символ сколько раз указано в cx
2288	clevermous	90	@@:
		91	call putchar
		92	loop @b
		93
		94	if DEBUG
		95	pushad
		96	mov ax, cs
3539	clevermous	97	shl eax, 4 ; в десятичной системе адрес сегмента
2288	clevermous	98	mov cx, 0xa
		99	mov di, cseg_msg
		100	call decode
		101	;***************
		102	mov si, cseg_msg
		103	call printplain
		104	popad
		105	end if
		106
		107
		108	if DEBUG
		109	mov si, stack_msg
		110	call printplain
		111	end if
		112
		113	; Require 586 or higher processor (cpuid and rdtsc,rdmsr/wrmsr commands)
		114	; install int 6 (#UD) handler
		115	xor bx, bx
		116	mov ds, bx
		117	push word [bx+6*4+2]
		118	push word [bx+6*4]
		119	mov word [bx+6*4], ud16
		120	mov word [bx+6*4+2], cs
		121	; issue CPUID command
		122	xor eax, eax ; N.B.: will cause #UD before 386
		123	cpuid ; N.B.: will cause #UD before later 486s
		124	test eax, eax
		125	jz cpubad
		126	; get processor features
		127	xor eax, eax
		128	inc ax
		129	cpuid
		130	test dl, 10h ; CPUID[1].edx[4] - TSC support
		131	jz cpubad
		132	test dl, 20h ; CPUID[1].edx[5] - MSR support
		133	jnz cpugood
		134
		135	ud16: ; #UD handler, called if processor did not recognize some commands
		136	cpubad:
		137	; restore int 6 (#UD) handler
		138	pop word [6*4]
		139	pop word [6*4+2]
		140	; say error
		141	push cs
		142	pop ds
		143	mov si, badprocessor
		144	sayerr:
		145	call printplain
		146	jmp $
		147
		148	cpugood:
		149	; restore int 6 (#UD) handler
		150	pop dword [6*4]
		151	push cs
		152	pop ds
		153
		154	; set up esp
		155	movzx esp, sp
		156
		157	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		158	; init memory
		159	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		160
		161
		162
		163
		164	; Load startos.ini
3539	clevermous	165	mov cx, loop_read_startos_file ;кол-во попыток чтения файла конфигурации startos.ini
2288	clevermous	166	align 4
		167	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		168	; Load startos.ini ;
		169	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		170	load_startos_file:
		171
		172	xor ax, ax
		173	mov di, file_data
		174	inc ax ;function 1 - read file
		175	push cx
		176	call far dword [loader_callback]
		177	pop cx
		178	push cs
		179	push cs
		180	pop ds
		181	pop es
		182
		183	test bx, bx
		184	jz check_conf_file
		185	dec cx
		186	jnz load_startos_file
		187
		188	;SET DEFAULT Not use ini file
		189	error_ini:
		190	mov si, error_ini_f1 ;Error: cannot load ini file, buffer is full
		191	dec bx
		192	jz err_show_ini
		193	mov si, error_ini_f2 ;Error: ini file not found
		194	dec bx
		195	jz err_show_ini
		196	mov si, error_ini_f3 ;Error: cannot read ini file
		197	dec bx
		198	jz err_show_ini
		199
		200	mov si, error_ini_nf ;Error: unrecognized error when loading ini file
		201	err_show_ini:
		202	call printplain
		203	mov si, error_ini_common
		204	call printplain
		205	; wait for keypress
		206	xor ax, ax
		207	int 16h
		208
		209	ini_loaded:
		210
		211	jmp $
		212
		213	align 4
		214	check_conf_file:
		215	;Check config file in current dir
		216	push ax ;save size file
		217	if DEBUG
		218	mov cx, 0x0a
		219	mov di, show_decode
		220	call decode
		221	;Show size
		222	mov si, show_string
		223	call printplain
		224	end if
		225
		226
		227	;Show message
		228	mov si, load_ini
		229	call printplain
		230
		231	pop cx ;restore size file
		232	use_parse ;parsing startos.ini
		233	;
		234	jmp ini_loaded
		235
		236	;;;;;;;;;;;;;;;;;;;;;;;;;;;
		237	;DATA
		238	;;;;;;;;;;;;;;;;;;;;;;;;;;;
		239	; table for move to extended memory (int 15h, ah=87h)
		240	align 4
		241	table_15_87:
		242	db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
		243	db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
		244
		245	db 0xff,0xff
		246	db 0x0,0x10
		247	db 0x00,0x93,0x0,0x0
		248
		249	db 0xff,0xff,0x0,0x00,0x10,0x93,0x0,0x0
		250
		251	db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
		252	db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
		253	db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
		254	db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
		255
		256	fat12_buffer:
3539	clevermous	257	.BS_jmpBoot db 0x90,0x90,0x90 ;3 байта NOP инструкция - ничего не делать
		258	.BS_OEMName db 'K SyS 64' ;8 байт
		259	.BPB_BytsPerSec dw 512 ;кол-во байтов в секторе может быть любое 512 1024 2048 4096 2 байта
		260	.BPB_SecPerClus db 0x1 ;кол-во секторов в кластере
		261	.BPB_RsvdSecCnt dw 0x1 ;для FAt12/16 только 1, для FAT32 обычно 32
		262	.BPB_NumFATs db 0x1 ;кол-во фат таблиц, на тот случай если будет сброс на дискету образа рам диска
		263	.BPB_RootEntCnt dw 512 ;для мак совместимости с fat16
		264	.BPB_TotSec16 dw 0x0 ;кл-во секторов
2288	clevermous	265	.BPB_Media db 0xF0
		266	.BPB_FATSz16 dw 0x0
3539	clevermous	267	.BPB_SecPerTrk dw 0x0 ;содержит геометрию диска для RAMFS на как бы без разницы, пока пустое поле, позже внести реальные значения.
2288	clevermous	268	.BPB_NumHeads dw 0x0
3539	clevermous	269	.BPB_HiddSec dd 0x0 ;кол-во скрытых секторов
2288	clevermous	270	.BPB_TotSec32 dd 0x0
3539	clevermous	271	.BS_DrvNum db 'R' ;от слова RAM
2288	clevermous	272	.BS_Reserved1 db 0x0
		273	.BS_BootSig db 0x29
		274	.BS_VolID db 'RFKS'
3539	clevermous	275	.BS_VolLab db 'RAM DISK FS' ;11 символов
		276	.BS_FilSysType db 'FAT12 ' ;8 символов
		277	;62 байта структура fat12.
2288	clevermous	278	db (512-($-fat12_buffer))dup(0x90)
		279
		280
		281
3539	clevermous	282	;структура для дирректории fat
2288	clevermous	283	struc FAT_32_entry ;Byte Directory Entry Structure
		284	{
		285	.DIR_Name rb 11
		286	.DIR_Attr db ?
		287	.DIR_NTRes db ?
		288	.DIR_CrtTimeTenth db ?
		289	.DIR_CrtTime dw ?
		290	.DIR_CrtDate dw ?
		291	.DIR_LstAccDate dw ?
		292	.DIR_FstClusHI dw ?
		293	.DIR_WrtTime dw ?
		294	.DIR_WrtDate dw ?
		295	.DIR_FstClusLO dw ?
		296	.DIR_FileSize dd ?
		297
		298
		299	}
3539	clevermous	300	;Тут будут распологатсья данные, которые затруднительно распологать в стековой области....
2288	clevermous	301	;;;
		302	;timer
3539	clevermous	303	shot_name_fat rb 11 ;временный буфер для fat12, в нем храняться имена файлов приведенные к правилам FAT /* вдальнейшем перенести в стэк
2288	clevermous	304
		305	if DEBUG
3539	clevermous	306	rb 1 ;нужен для отладки и вывода имени файла после преобразования
2288	clevermous	307	dest_name_fat db 24 dup('_');12
		308	db 0x0
		309	end if
		310
		311	value_timeout rw 1 ;value to timeout
3539	clevermous	312	old_timer rd 1 ;старое значение вектора таймера
		313	start_timer rd 1 ;значение таймера
		314	timer_ rd 1 ;новое значение вектора таймера т.е. SL
2288	clevermous	315	start_stack rw 1 ;save stack
		316	save_bp_from_timer rw 1 ;save bp from timer
		317

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(root)/kernel/trunk/sec_loader/trunk/loader.asm – Rev 3539