One reason for junk char's is that your console baud rate is not matching in user space initialization. After "Freeing init memory" init is called which is in busybox and /etc/inittab is called. so check the baud rate On Fri, Nov 6, 2009 at 1:24 AM, Wan ZongShun <mcuos.com@xxxxxxxxx> wrote: > Hi Prabha, > > Please pay attention to the EABI configure option. > > 2009/11/2 Prabha J <prabha.j@xxxxxxx>: >> >> Hi , >> >> we are porting linux 2.6.27 on imx27 based platform. we did all the platform >> dependent changes . >> >> With this linux is booting till a point and stopping there .. >> >> stopping at >> >> (VFS) Mounting file system >> Freeing init memory >> >> While debugging through printk we could go till >> >> rest_init() -> kernel _init() -> init_post() ---> >> >> Going for opening initial console . .... using sys_open() .... After that no >> prints ....... >> >> >> Can any body help us to go forward ? >> >> Thanks in advance , >> Prabha >> >> >> Please see the following logs .. >> >> Launch LinuxUncompressing >> Linux...................................................................... >> done, booting the kernel. >> Linux version 2.6.28-arm2 (root@xxxxxxxxxxxxxxxxxxxxx) (gcc version 4.1.1) >> #75 Wed Oct 28 13:12:53 IST 2009 >> CPU: ARM926EJ-S [41069264] revision 4 (ARMv5TEJ), cr=00053177 >> CPU: VIVT data cache, VIVT instruction cache >> Machine: Freescale i.MX27ADS >> Memory policy: ECC disabled, Data cache writeback >> Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256 >> Kernel command line: root=/dev/ram rw mem=64M console=ttymxc0,115200 >> MXC GPIO hardware >> MXC IRQ initialized >> PID hash table entries: 256 (order: 8, 1024 bytes) >> >> Clock input source is 26000000 >> >> After for loop >> test1 >> CCM_PCCR1 = fe5aef88 >> b4 spll_clk.disableConsole: colour dummy device 80x30 >> Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) >> Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) >> Memory: 64MB = 64MB total >> Memory: 60780KB available (1956K code, 252K data, 92K init) >> Calibrating delay loop... 132.71 BogoMIPS (lpj=663552) >> Security Framework initialized >> Mount-cache hash table entries: 512 >> CPU: Testing write buffer coherency: ok >> kernel thread started : M.V<5>SCSI subsystem initialized >> checking if image is initramfs...it isn't (no cpio magic); looks like an >> initrd >> do_sys_open entry<6>Freeing initrd memory: 1792K >> NetWinder Floating Point Emulator V0.97 (extended precision) >> VFS: Disk quotas dquot_6.5.1 >> Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) >> JFS: nTxBlock = 489, nTxLock = 3914 >> msgmni has been set to 122 >> io scheduler noop registered >> io scheduler anticipatory registered >> io scheduler deadline registered >> io scheduler cfq registered (default) >> Serial: IMX driver >> imx-uart.0: ttymxc0 at MMIO 0x1000a000 (irq = 20) is a IMX >> console [ttymxc0] enabled >> imx-uart.1: ttymxc1 at MMIO 0x1000b000 (irq = 19) is a IMX >> imx-uart.2: ttymxc2 at MMIO 0x1000c000 (irq = 18) is a IMX >> imx-uart.3: ttymxc3 at MMIO 0x1000d000 (irq = 17) is a IMX >> imx-uart.4: ttymxc4 at MMIO 0x1001b000 (irq = 49) is a IMX >> imx-uart.5: ttymxc5 at MMIO 0x1001c000 (irq = 48) is a IMX >> brd: module loaded >> loop: module loaded >> st: Version 20080504, fixed bufsize 32768, s/g segs 256 >> Driver 'st' needs updating - please use bus_type methods >> Driver 'sd' needs updating - please use bus_type methods >> drivers/rtc/hctosys.c: unable to open rtc device (rtc0) >> do_sys_open entrydo_sys_open entry<5>RAMDISK: Compressed image found at >> block 0 >> EXT2-fs warning: mounting unchecked fs, running e2fsck is recommended >> VFS: Mounted root (ext2 filesystem). >> Freeing init memory: 92K >> >> >> After this some junk characters are coming like .... >> >> ��֍�򁰠0^ޝ��r�'���ϊ��r:�������:��M� ��D�d�z ?�� >> Τ��8V�`�Т���V잊]nn]^ク�m8m��^� �m� E��N��8��6���:]��� >> >> >> >> >> >> >> =====-----=====-----===== >> Notice: The information contained in this e-mail >> message and/or attachments to it may contain >> confidential or privileged information. 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Thank you >> >> >> >> _______________________________________________ >> linux-arm mailing list >> linux-arm@xxxxxxxxxxxxxxxxxxx >> http://lists.infradead.org/mailman/listinfo/linux-arm >> >> > > > > -- > linux-arm-kernel mailing list > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > > _______________________________________________ > linux-arm mailing list > linux-arm@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-arm > _______________________________________________ linux-arm mailing list linux-arm@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-arm
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