Re: not coming prompt in 2.6.33.6 kernel

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On Wed, Jul 28, 2010 at 08:51:06AM +0530, nitin vishnoi wrote:
> Hi
> 
> I am porting the 2.6.33.6 kernel,which i took from kernel.org.I am trying to
> port it on samsung-s3c2451 board.
> But i am not getting the shell prompt,due to getting the following error.Any
> body can tell due to what this error i am getting?
> 
> Starting kernel ...
> 
> 
> Uncompressing Linux... done, booting the kernel.
> Linux version 2.6.33.6 (root@ubntu-desktop) (gcc version 4.2.2) #12 Mon Jul
> 26 18:39:19 IST 2010
> CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
> CPU: VIVT data cache, VIVT instruction cache
> Machine: SMDK2450
> Ignoring unrecognised tag 0x00000000
> Memory policy: ECC disabled, Data cache writeback
> CPU S3C2450 EVT3 (id 0x32450003)
> SPA   epll  80200102  Mpll  80640061   clkdiv0 557
> S3C24XX Clocks, (c) 2004 Simtec Electronics
> S3C2450: mpll on 800.000 MHz, cpu 400.000 MHz, mem 133.333 MHz, pclk 66.666
> MHz
> S3C2450: epll on 96.000 MHz, usb-bus 48.000 MHz
> Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
> Kernel command line: root=/dev/ram0 initrd=0x30800000,16M ramdisk=32768
> init=/bin/sh console=ttySAC3,115200 mem=64M
> PID hash table entries: 256 (order: -2, 1024 bytes)
> 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: 45432KB available (2588K code, 271K data, 116K init, 0K highmem)
> Hierarchical RCU implementation.
> NR_IRQS:109
> irq: clearing subpending status 02000006
> irq: clearing subpending status 02000002
> timer tcon=00000000, tcnt 28af, tcfg 00000f00,00000000, usec 00007ae2
> Console: colour dummy device 80x30
> console [ttySAC3] enabled
> Calibrating delay loop... 398.95 BogoMIPS (lpj=997376)
> Mount-cache hash table entries: 512
> CPU: Testing write buffer coherency: ok
> NET: Registered protocol family 16
> whats up blady
> hello
> entered machine init
> S3C Power Management, Copyright 2004 Simtec Electronics
> S3C2450: Initialising architecture
> SPA s3c2450_init
> S3C2450: IRQ Support
> bio: create slab <bio-0> at 0
> SCSI subsystem initialized
> NET: Registered protocol family 2
> IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
> TCP established hash table entries: 2048 (order: 2, 16384 bytes)
> TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
> TCP: Hash tables configured (established 2048 bind 2048)
> TCP reno registered
> UDP hash table entries: 256 (order: 0, 4096 bytes)
> UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
> NET: Registered protocol family 1
> Trying to unpack rootfs image as initramfs...
> rootfs image is not initramfs (no cpio magic); looks like an initrd
> Freeing initrd memory: 16384K
> NetWinder Floating Point Emulator V0.97 (double precision)
> JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
> ROMFS MTD (C) 2007 Red Hat, Inc.
> msgmni has been set to 120
> alg: No test for stdrng (krng)
> Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
> io scheduler noop registered
> io scheduler deadline registered
> io scheduler cfq registered (default)
> brd: module loaded
> loop: module loaded
> Uniform Multi-Platform E-IDE driver
> ide-gd driver 1.18
> ide-cd driver 5.00
> PPP generic driver version 2.4.2
> PPP Deflate Compression module registered
> PPP BSD Compression module registered
> PPP MPPE Compression module registered
> NET: Registered protocol family 24
> SLIP: version 0.8.4-NET3.019-NEWTTY (dynamic channels, max=256).
> CSLIP: code copyright 1989 Regents of the University of California.
> mice: PS/2 mouse device common for all mice
> TCP cubic registered
> RAMDISK: gzip image found at block 0
> EXT2-fs (ram0): warning: maximal mount count reached, running e2fsck is
> recommended
> VFS: Mounted root (ext2 filesystem) on device 1:0.
> Freeing init memory: 116K
> Warning: unable to open an initial console.
> Kernel panic - not syncing: Attempted to kill init!
> [<c002b900>] (unwind_backtrace+0x0/0xe0) from [<c003fe9c>]
> (panic+0x40/0x12c)
> [<c003fe9c>] (panic+0x40/0x12c) from [<c0042cac>] (do_exit+0x58/0x57c)
> [<c0042cac>] (do_exit+0x58/0x57c) from [<c0043254>]
> (do_group_exit+0x84/0xb8)
> [<c0043254>] (do_group_exit+0x84/0xb8) from [<c004329c>]
> (sys_exit_group+0x14/0x20)
> [<c004329c>] (sys_exit_group+0x14/0x20) from [<c0025e80>]
> (ret_fast_syscall+0x0/0x28)

looks like whatever you're trying to run as init doesn't have /dev/console
available. there seems to be no evidence of UARTs being added in the
setup, are they being registered with the serial driver properly?

-- 
Ben

Q:      What's a light-year?
A:      One-third less calories than a regular year.

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