[g-bios] 完善boot kernel机制

yifei_wang

回复 10# CQMW114


      boot -f 7 启动后生成的默认 command line 参数为: ubi.mtd=7 root=ubi0_0 rootfstype=ubifs

      因此，对 boot -l 选项的测试没有对照性啊!

CQMW114

Introduction about UBI and UBIFS structrure

	Description	block
UBI	For Internal-vol,Wearleveling,Scrubbing	4
	For Bad Block	20

		SuperBlock/Master Block	3
		LOG/LPT	14
UBIFS		Empty Block	24
	Main Area	Index Block	19
		Data Block	1964

kopqiu

1. [    2.983032] Creating 8 MTD partitions on "omap2-nand.0":
   
2. [    2.988708] 0x000000000000-0x000000080000 : "g-bios"
   
3. [    3.049896] 0x000000080000-0x000000280000 : "g-bios"
   
4. [    3.075469] 0x000000280000-0x0000002a0000 : "g-bios"
   
5. [    3.100097] 0x0000002a0000-0x0000005a0000 : "linux"
   
6. [    3.129669] 0x0000005a0000-0x0000008a0000 : "ramdisk"
   
7. [    3.156799] 0x0000008a0000-0x0000048a0000 : "rootfs"
   
8. [    3.233215] 0x0000048a0000-0x0000088a0000 : "data_1"
   
9. [    3.310333] 0x0000088a0000-0x000010000000 : "data_2"
   
10. [    3.438690] OneNAND driver initializing
    
11. [    3.456329] UBI: attaching mtd7 to ubi0
    
12. [    3.457092] UBI: physical eraseblock size:   131072 bytes (128 KiB)
    
13. [    3.457611] UBI: logical eraseblock size:    126976 bytes
    
14. [    3.458068] UBI: smallest flash I/O unit:    2048
    
15. [    3.458496] UBI: VID header offset:          2048 (aligned 2048)
    
16. [    3.458984] UBI: data offset:                4096
    
17. [    3.469573] UBI error: validate_ec_hdr: bad VID header offset 512, expected 2048
    
18. [    3.470214] UBI error: validate_ec_hdr: bad EC header
    
19. ...........
    
20. 
    
21. [    3.508148] Kernel panic - not syncing: Attempted to kill init!
    
22. 
    

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目前的问题是：bad VID header offset 512, expected 2048。 应该是参数设置错误，尝试修改ubinize -o ubi.img -m 2048 -p 128KiB -s 512 ubinize.cfg中的-s选项。
继续中。。。

kopqiu

boot kernel时出现ECC ERROR，修改linux-3.0/driver/mtd/nand/omap2.c
fix-omap-ecc.patch.tar.bz2 (40 KB, 下载次数: 40)

2011-10-13 18:57 上传

点击文件名下载附件

CQMW114

经过分析讨论，在“ubinize -o ubi.img -m 2048 -p 128KiB -s 512 ubinize.cfg”中，将“-s”选项删去可以正常显示create volume table

1. [    3.147918] 8 cmdlinepart partitions found on MTD device omap2-nand.0
   
2. [    3.148529] Creating 8 MTD partitions on "omap2-nand.0":
   
3. [    3.150146] 0x000000000000-0x000000080000 : "g-bios"
   
4. [    3.197021] 0x000000080000-0x000000280000 : "g-bios"
   
5. [    3.224334] 0x000000280000-0x0000002a0000 : "g-bios"
   
6. [    3.261962] 0x0000002a0000-0x0000005a0000 : "linux"
   
7. [    3.293640] 0x0000005a0000-0x0000008a0000 : "ramdisk"
   
8. [    3.325256] 0x0000008a0000-0x0000048a0000 : "rootfs"
   
9. [    3.404083] 0x0000048a0000-0x0000088a0000 : "data_1"
   
10. [    3.481445] 0x0000088a0000-0x000010000000 : "data_2"
    
11. [    3.601898] OneNAND driver initializing
    
12. [    3.619140] UBI: attaching mtd7 to ubi0
    
13. [    3.619903] UBI: physical eraseblock size:   131072 bytes (128 KiB)
    
14. [    3.620574] UBI: logical eraseblock size:    126976 bytes
    
15. [    3.621032] UBI: smallest flash I/O unit:    2048
    
16. [    3.621429] UBI: VID header offset:          2048 (aligned 2048)
    
17. [    3.622009] UBI: data offset:                4096
    
18. [    7.465148] UBI: empty MTD device detected
    
19. [    7.466430] UBI: max. sequence number:       0
    
20. [    7.467559] UBI: create volume table (copy #1)

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下一步需要认出EC header

CQMW114

制作UBIFS的步骤不变，没出现错误，卡死循环

1. [    3.945495] UBI: physical eraseblock size:   131072 bytes (128 KiB)
   
2. [    3.945983] UBI: logical eraseblock size:    126976 bytes
   
3. [    3.946380] UBI: smallest flash I/O unit:    2048
   
4. [    3.948364] UBI: VID header offset:          2048 (aligned 2048)
   
5. [    3.949401] UBI: data offset:                4096
   
6. [    7.917114] UBI: max. sequence number:       0
   

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决定查看linux3.0 源码的UBI部分，查找错误。。

CQMW114

尝试跟linux3.0中UBI的部分源码，加入调试语句，提前打印volume table的信息，进行比对分析，未发现参数有误：

1.     UBI: attaching mtd4 to ubi0
   
2.     UBI: physical eraseblock size: 131072 bytes (128 KiB)
   
3.     UBI: logical eraseblock size: 129024 bytes
   
4.     UBI: smallest flash I/O unit: 2048
   
5.     UBI: sub-page size: 512
   
6.     UBI: VID header offset: 512 (aligned 512)
   
7.     UBI: data offset: 2048
   
8.     UBI: attached mtd4 to ubi0
   
9.     UBI: MTD device name: "File System"
   
10.     UBI: MTD device size: 121 MiB
    
11.     UBI: number of good PEBs: 970
    
12.     UBI: number of bad PEBs: 2
    
13.     UBI: max. allowed volumes: 128
    
14.     UBI: wear-leveling threshold: 4096
    
15.     UBI: number of internal volumes: 1
    
16.     UBI: number of user volumes: 1
    
17.     UBI: available PEBs: 0
    
18.     UBI: total number of reserved PEBs: 970
    
19. [color=Red]   UBI: number of PEBs reserved for bad PEB handling: 9[/color]
    
20.     UBI: max/mean erase counter: 2/0

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CQMW114

设置跟踪调试语句，在ubi_io_write函数中停止，由于程序运行需要2个多小时，所以尝试找出运行时间长的原因：

1. [    7.833740] vmt5 :LINE=569, FUN=ubi_resize_volume
   
2. [    7.834136] vtbl: LINE=92,FUN=ubi_change_vtbl_record
   
3. 
   
4. [    7.848419] eba: LINE=656,FUN=ubi_eba_write_leb
   
5. [    7.848815] wl.c :LINE=419,FUN=ubi_wl_get_peb
   
6. 
   
7. [    7.861267] wl.c :LINE=297,FUN=produce_free_peb
   
8. [    7.861663] wl.c :LINE=223,FUN=do_work
   
9. 
   
10. [    7.874237] ic.c :LINE=899,FUN=ubi_io_write_ec_hdr
    
11. [    7.874664] ic.c :LINE=248,FUN=ubi_io_write
    
12. 
    
13. [  169.957702] ic.c :LINE=903,FUN=ubi_io_write_ec_hdr
    
14. [  169.959167] wl.c :LINE=266,FUN=do_work
    
15. 
    
16. [  169.964813] wl.c :LINE=309,FUN=produce_free_peb
    
17. [  169.965667] wl.c :LINE=444,FUN=ubi_wl_get_peb
    
18. 
    
19. [  169.974212] eba: LINE=658,FUN=ubi_eba_write_leb
    
20. 
    
21. [  169.979156] LINE=1160,FUN=ubi_io_write_vid_hdr
    
22. [  169.979980] ic.c :LINE=248,FUN=ubi_io_write
    
23. 
    
24. [  327.953582] eba: LINE=673,FUN=ubi_eba_write_leb
    
25. 
    
26. [  327.955474] LINE=653,FUN=ubi_io_write_data
    
27. [  327.956909] ic.c :LINE=248,FUN=ubi_io_write

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CQMW114

运行两个多小时之后， 显示 “Unable to mount root fs  ”：

1. [size=4][ 8575.461853] List of all partitions:
   
2. [ 8575.463226] 1f00             512 mtdblock0  (driver?)
   
3. [ 8575.464385] 1f01            2048 mtdblock1  (driver?)
   
4. [ 8575.464874] 1f02             128 mtdblock2  (driver?)
   
5. [ 8575.465362] 1f03            3072 mtdblock3  (driver?)
   
6. [ 8575.465820] 1f04            3072 mtdblock4  (driver?)
   
7. [ 8575.466278] 1f05           65536 mtdblock5  (driver?)
   
8. [ 8575.466766] 1f06           65536 mtdblock6  (driver?)
   
9. [ 8575.467315] 1f07          122240 mtdblock7  (driver?)
   
10. [ 8575.467773] 1f08          116808 mtdblock8  (driver?)
    
11. [ 8575.468261] No filesystem could mount root, tried:  ubifs
    
12. [ 8575.468963] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)[/size]

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CQMW114

由于在虚拟机上启动kernel时间较长，中午改用s3c6400板子。安装minicom 2.5之后，启动g-bios发现无法输入命令行，所以尝试解决问题：
解决方法如下：
sudo minicon -s ->Serial port setup-> F - Hardware Flow Control,
将 F - Hardware Flow Control项中的“yes”改为"no"即可。