WebSVN – HelenOS – Diff – /branches/arm/tools/mkfat.py


#!/usr/bin/env python
#
# Copyright (c) 2008 Martin Decky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
"""
FAT creator
"""
 
import sys
import os
import random
import xstruct
 
BOOT_SECTOR = """little:
    uint8_t jmp[3]             /* jump instruction */
    char oem[8]                /* OEM string */
    uint16_t sector            /* bytes per sector */
    uint8_t cluster            /* sectors per cluster */
    uint16_t reserved          /* reserved sectors */
    uint8_t fats               /* number of FATs */
    uint16_t rootdir           /* root directory entries */
    uint16_t sectors           /* total number of sectors */
    uint8_t descriptor         /* media descriptor */
    uint16_t fat_sectors       /* sectors per single FAT */
    uint16_t track_sectors     /* sectors per track */
    uint16_t heads             /* number of heads */
    uint32_t hidden            /* hidden sectors */
    uint32_t sectors_big       /* total number of sectors (if sectors == 0) */
   
    /* Extended BIOS Parameter Block */
    uint8_t drive              /* physical drive number */
    padding[1]                 /* reserved (current head) */
    uint8_t extboot_signature  /* extended boot signature */
    uint32_t serial            /* serial number */
    char label[11]             /* volume label */
    char fstype[8]             /* filesystem type */
    padding[448]               /* boot code */
    uint8_t boot_signature[2]  /* boot signature */
"""
 
def usage(prname):
    "Print usage syntax"
    print prname + " <PATH> <IMAGE>"
 
def main():
    if (len(sys.argv) < 3):
        usage(sys.argv[0])
        return
   
    path = os.path.abspath(sys.argv[1])
    if (not os.path.isdir(path)):
        print "<PATH> must be a directory"
        return
   
    outf = file(sys.argv[2], "w")
   
    boot_sector = xstruct.create(BOOT_SECTOR)
    boot_sector.jmp = [0xEB, 0x3C, 0x90]
    boot_sector.oem = "MSDOS5.0"
    boot_sector.sector = 512
    boot_sector.cluster = 8 # 4096 bytes per cluster
    boot_sector.reserved = 1
    boot_sector.fats = 2
    boot_sector.rootdir = 224 # FIXME: root directory should be sector aligned
    boot_sector.sectors = 0 # FIXME
    boot_sector.descriptor = 0xF8
    boot_sector.fat_sectors = 0 # FIXME
    boot_sector.track_sectors = 0 # FIXME
    boot_sector.heads = 0 # FIXME
    boot_sector.hidden = 0
    boot_sector.sectors_big = 0 # FIXME
   
    boot_sector.drive = 0
    boot_sector.extboot_signature = 0x29
    boot_sector.serial = random.randint(0, 0xFFFFFFFF)
    boot_sector.label = "HELENOS"
    boot_sector.fstype = "FAT16   "
    boot_sector.boot_signature = [0x55, 0xAA]
   
    outf.write(boot_sector.pack())
   
    outf.close()
   
if __name__ == '__main__':
    main()
 

Subversion Repositories HelenOS

(root)/branches/arm/tools/mkfat.py @ 3759 – Rev 3264 → 3478

Rev 3264		Rev 3478
1	#!/usr/bin/env python	1	#!/usr/bin/env python
2	#	2	#
3	# Copyright (c) 2008 Martin Decky	3	# Copyright (c) 2008 Martin Decky
4	# All rights reserved.	4	# All rights reserved.
5	#	5	#
6	# Redistribution and use in source and binary forms, with or without	6	# Redistribution and use in source and binary forms, with or without
7	# modification, are permitted provided that the following conditions	7	# modification, are permitted provided that the following conditions
8	# are met:	8	# are met:
9	#	9	#
10	# - Redistributions of source code must retain the above copyright	10	# - Redistributions of source code must retain the above copyright
11	# notice, this list of conditions and the following disclaimer.	11	# notice, this list of conditions and the following disclaimer.
12	# - Redistributions in binary form must reproduce the above copyright	12	# - Redistributions in binary form must reproduce the above copyright
13	# notice, this list of conditions and the following disclaimer in the	13	# notice, this list of conditions and the following disclaimer in the
14	# documentation and/or other materials provided with the distribution.	14	# documentation and/or other materials provided with the distribution.
15	# - The name of the author may not be used to endorse or promote products	15	# - The name of the author may not be used to endorse or promote products
16	# derived from this software without specific prior written permission.	16	# derived from this software without specific prior written permission.
17	#	17	#
18	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	18	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	19	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	23	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	24	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	25	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	26	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	27	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	#	28	#
29	"""	29	"""
30	FAT creator	30	FAT creator
31	"""	31	"""
32		32
33	import sys	33	import sys
34	import os	34	import os
35	import random	35	import random
36	import xstruct	36	import xstruct
37		37
38	BOOT_SECTOR = """little:	38	BOOT_SECTOR = """little:
39	uint8_t jmp[3] /* jump instruction */	39	uint8_t jmp[3] /* jump instruction */
40	char oem[8] /* OEM string */	40	char oem[8] /* OEM string */
41	uint16_t sector /* bytes per sector */	41	uint16_t sector /* bytes per sector */
42	uint8_t cluster /* sectors per cluster */	42	uint8_t cluster /* sectors per cluster */
43	uint16_t reserved /* reserved sectors */	43	uint16_t reserved /* reserved sectors */
44	uint8_t fats /* number of FATs */	44	uint8_t fats /* number of FATs */
45	uint16_t rootdir /* root directory entries */	45	uint16_t rootdir /* root directory entries */
46	uint16_t sectors /* total number of sectors */	46	uint16_t sectors /* total number of sectors */
47	uint8_t descriptor /* media descriptor */	47	uint8_t descriptor /* media descriptor */
48	uint16_t fat_sectors /* sectors per single FAT */	48	uint16_t fat_sectors /* sectors per single FAT */
49	uint16_t track_sectors /* sectors per track */	49	uint16_t track_sectors /* sectors per track */
50	uint16_t heads /* number of heads */	50	uint16_t heads /* number of heads */
51	uint32_t hidden /* hidden sectors */	51	uint32_t hidden /* hidden sectors */
52	uint32_t sectors_big /* total number of sectors (if sectors == 0) */	52	uint32_t sectors_big /* total number of sectors (if sectors == 0) */
53		53
54	/* Extended BIOS Parameter Block */	54	/* Extended BIOS Parameter Block */
55	uint8_t drive /* physical drive number */	55	uint8_t drive /* physical drive number */
56	padding[1] /* reserved (current head) */	56	padding[1] /* reserved (current head) */
57	uint8_t extboot_signature /* extended boot signature */	57	uint8_t extboot_signature /* extended boot signature */
58	uint32_t serial /* serial number */	58	uint32_t serial /* serial number */
59	char label[11] /* volume label */	59	char label[11] /* volume label */
60	char fstype[8] /* filesystem type */	60	char fstype[8] /* filesystem type */
61	padding[448] /* boot code */	61	padding[448] /* boot code */
62	uint8_t boot_signature[2] /* boot signature */	62	uint8_t boot_signature[2] /* boot signature */
63	"""	63	"""
64		64
65	def usage(prname):	65	def usage(prname):
66	"Print usage syntax"	66	"Print usage syntax"
67	print prname + " <PATH> <IMAGE>"	67	print prname + " <PATH> <IMAGE>"
68		68
69	def main():	69	def main():
70	if (len(sys.argv) < 3):	70	if (len(sys.argv) < 3):
71	usage(sys.argv[0])	71	usage(sys.argv[0])
72	return	72	return
73		73
74	path = os.path.abspath(sys.argv[1])	74	path = os.path.abspath(sys.argv[1])
75	if (not os.path.isdir(path)):	75	if (not os.path.isdir(path)):
76	print "<PATH> must be a directory"	76	print "<PATH> must be a directory"
77	return	77	return
78		78
79	outf = file(sys.argv[2], "w")	79	outf = file(sys.argv[2], "w")
80		80
81	boot_sector = xstruct.create(BOOT_SECTOR)	81	boot_sector = xstruct.create(BOOT_SECTOR)
82	boot_sector.jmp = [0xEB, 0x3C, 0x90]	82	boot_sector.jmp = [0xEB, 0x3C, 0x90]
83	boot_sector.oem = "MSDOS5.0"	83	boot_sector.oem = "MSDOS5.0"
84	boot_sector.sector = 512	84	boot_sector.sector = 512
85	boot_sector.cluster = 8 # 4096 bytes per cluster	85	boot_sector.cluster = 8 # 4096 bytes per cluster
86	boot_sector.reserved = 1	86	boot_sector.reserved = 1
87	boot_sector.fats = 2	87	boot_sector.fats = 2
88	boot_sector.rootdir = 224 # FIXME: root directory should be sector aligned	88	boot_sector.rootdir = 224 # FIXME: root directory should be sector aligned
89	boot_sector.sectors = 0 # FIXME	89	boot_sector.sectors = 0 # FIXME
90	boot_sector.descriptor = 0xF8	90	boot_sector.descriptor = 0xF8
91	boot_sector.fat_sectors = 0 # FIXME	91	boot_sector.fat_sectors = 0 # FIXME
92	boot_sector.track_sectors = 0 # FIXME	92	boot_sector.track_sectors = 0 # FIXME
93	boot_sector.heads = 0 # FIXME	93	boot_sector.heads = 0 # FIXME
94	boot_sector.hidden = 0	94	boot_sector.hidden = 0
95	boot_sector.sectors_big = 0 # FIXME	95	boot_sector.sectors_big = 0 # FIXME
96		96
97	boot_sector.drive = 0	97	boot_sector.drive = 0
98	boot_sector.extboot_signature = 0x29	98	boot_sector.extboot_signature = 0x29
99	boot_sector.serial = random.randint(0, 0xFFFFFFFF)	99	boot_sector.serial = random.randint(0, 0xFFFFFFFF)
100	boot_sector.label = "HELENOS"	100	boot_sector.label = "HELENOS"
101	boot_sector.fstype = "FAT16 "	101	boot_sector.fstype = "FAT16 "
102	boot_sector.boot_signature = [0x55, 0xAA]	102	boot_sector.boot_signature = [0x55, 0xAA]
103		103
104	outf.write(boot_sector.pack())	104	outf.write(boot_sector.pack())
105		105
106	outf.close()	106	outf.close()
107		107
108	if __name__ == '__main__':	108	if __name__ == '__main__':
109	main()	109	main()
110		110