各位高手！我刚接触嵌入式不久，遇到了很多问题，现在正在做S3C2410的根文件系统，可是怎么试都不能顺利启动挂载。我的内核是2.6.14，基本步骤如下（参考《Linux系统移植》）：
1.创建根文件系统的基本目录结构。（包含bin dev etc lib proc sbin sys usr 等目录）
2.配置、编译和安装Busybox-1.1.3
3.修改和创建必要的文件。（增加为SHELL导入全局变量的文件/etc/profile、增加初始化文件、增加初始化脚本、创建inetd.conf配置文件等）
4.建立根文件系统包（利用cramfs-1.1制作cramfs包）
5.将制作好的my_rootfs.cramfs烧写到flash中。
结果启动时总是显示:
VIVI version 0.1.4 (root@localhost.localdomain) (gcc version 2.95.3 20010315 (re
lease)) #0.1.4 二 5月 26 18:41:14 CST 2009
MMU table base address = 0x33DFC000
Succeed memory mapping.
NAND device: Manufacture ID: 0xec, Chip ID: 0x76 (Samsung K9D1208V0M)
Could not found 'param' partition
invalid (saved) parameter block
Could not found stored vivi parameters. Use default vivi parameters.
Press Return to start the LINUX now, any other key for vivi
type "help" for help.
vivi> boot
Copy linux kernel from 0x00100000 to 0x30008000, size = 0x00300000 ... done
zImage magic = 0x016f2818
Setup linux parameters at 0x30000100
linux command line is: "noinitrd root=/dev/mtdblock2 init=/linuxrc console=ttyS
AC0,115200"
MACH_TYPE = 193
NOW, Booting Linux......
Uncompressing Linux.............................................................
..... done, booting the kernel.
Linux version 2.6.14 (root@localhost.localdomain) (gcc version 3.4.4) #1 Tue May
26 17:33:05 CST 2009
CPU: ARM920Tid(wb) [41129200] revision 0 (ARMv4T)
Machine: SMDK2410
ATAG_INITRD is deprecated; please update your bootloader.
Memory policy: ECC disabled, Data cache writeback
CPU S3C2410A (id 0x32410002)
S3C2410: core 200.000 MHz, memory 100.000 MHz, peripheral 50.000 MHz
S3C2410 Clocks, (c) 2004 Simtec Electronics
CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on
CPU0: D VIVT write-back cache
CPU0: I cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets
CPU0: D cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets
Built 1 zonelists
Kernel command line: noinitrd root=/dev/mtdblock2 init=/linuxrc console=ttySAC0
,115200
irq: clearing subpending status 00000003
irq: clearing subpending status 00000002
PID hash table entries: 512 (order: 9, 8192 bytes)
timer tcon=00000000, tcnt a2c1, tcfg 00000200,00000000, usec 00001eb8
Console: colour dummy device 80x30
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
Memory: 64MB = 64MB total
Memory: 62720KB available (1639K code, 372K data, 92K init)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
softlockup thread 0 started up.
NET: Registered protocol family 16
S3C2410: Initialising architecture
S3C2410 DMA Driver, (c) 2003-2004 Simtec Electronics
DMA channel 0 at c4800000, irq 33
DMA channel 1 at c4800040, irq 34
DMA channel 2 at c4800080, irq 35
DMA channel 3 at c48000c0, irq 36
NetWinder Floating Point Emulator V0.97 (double precision)
devfs: 2004-01-31 Richard Gooch (rgooch@atnf.csiro.au)
devfs: boot_options: 0x1
Console: switching to colour frame buffer device 80x25
fb0: Virtual frame buffer device, using 1024K of video memory
S3C2410 RTC, (c) 2004 Simtec Electronics
s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2410
s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2410
s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2410
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
S3C24XX NAND Driver, (c) 2004 Simtec Electronics
s3c2410-nand: mapped registers at c4980000
s3c2410-nand: timing: Tacls 40ns, Twrph0 80ns, Twrph1 80ns
NAND device: Manufacturer ID: 0xec, Chip ID: 0x76 (Samsung NAND 64MiB 3,3V 8-bit
)
Scanning device for bad blocks
mice: PS/2 mouse device common for all mice
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 4096 (order: 2, 16384 bytes)
TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
TCP reno registered
TCP bic registered
NET: Registered protocol family 1
Root-NFS: No NFS server available, giving up.
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "mtdblock2" or unknown-block(2,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
请各位高手们抽时间看看吧，指点指点，有好的资料分享一下吧！你们的帮助将成为我们初学者前进的动力和增加信心的砝码！我的邮箱是wlm0813@163.com
非常感谢！期待中...... |
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