Boot problem on SMDK2440

"Kevin Morfitt" <kevin.morfitt@xxxxxxxxxxxx> · Thu, 22 Mar 2007 10:52:51 -0000

Hi

I'm trying to boot a 2.6.20.1 kernel on an SMDK2440 Board using a version of 

u-boot-1.0.0 modified by Samsung (but not supported by Samsung) to handle 

the NAND flash copy to SDRAM correctly. I start the boot using "bootp 

30008000" to tftp zImage from my host PC to the board then "run nfscmd" to 

boot where nfscmd is "setenv bootargs console=ttySAC0 root=dev/nfs rw 

nfsroot=192.168.172.50:/home/kmorfitt/glo-nav/rootfs 

ip=192.168.172.10:192.168.172.50:192.168.172.50:255.255.255.0:glo-nav-1::off 

panic=5; bootm 30008000".

When I run "boot" after tftp-ing zImage most of the time I see nothing, not 

even the "Uncompressing Linux" message, but if I set the wrong machine 

number in the boot args I always see a "invalid machine ID" error message 

from the kernel so it's definitely trying to boot.

I've found though that if I use gdb to single-step through the uncompression 

code at the start of the kernel boot I always get the boot messages below. 

OK, it still fails to boot, which is another problem I'll post separately, 

but it's at least trying.

As the kernel uncompressor doesn't configure the ARM at all it must rely on 

u-boot to set it up correctly (proper clock speed, MMU off, watchdog off 

etc) so I suspect it's a u-boot problem but I wondered if anyone had seen 

this before or had any ideas?

Thanks
Kevin

Uncompressing 

Linux.............................................................................................. 

done, booting the kernel.

Linux version 2.6.20.1 (kmorfitt@fearnside-laptop) (gcc version 4.1.0) #1 

Wed Mar 21 22:08:22 GMT 2007

CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177
Machine: SMDK2440
Memory policy: ECC disabled, Data cache writeback
CPU S3C2440A (id 0x32440001)
S3C244X: core 406.425 MHz, memory 135.475 MHz, peripheral 67.737 MHz
S3C24XX Clocks, (c) 2004 Simtec Electronics
CLOCK: Slow mode (2.116 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.  Total pages: 16256

Kernel command line: console=ttySAC0 root=dev/nfs rw 

nfsroot=192.168.172.50:/home/kmorfitt/glo-nav/rootfs 

ip=192.168.172.10:192.168.172.50:192.168.172.50:255.255.255.0:glo-nav-1::off 

panic=5

irq: clearing pending ext status 00000100
irq: clearing subpending status 00000003
irq: clearing subpending status 00000002
PID hash table entries: 256 (order: 8, 1024 bytes)
timer tcon=00500000, tcnt dc7f, tcfg 00000200,00000000, usec 000016ad
Console: 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: 61824KB available (2660K code, 271K data, 112K init)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
S3C24XX DMA Driver, (c) 2003-2004,2006 Simtec Electronics
Registering sysclass
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
NET: Registered protocol family 16
S3C2410 Power Management, (c) 2004 Simtec Electronics
S3C2440: Initialising architecture
S3C2440: IRQ Support
S3C2440: Clock Support, DVS off
0:               xdreq0, channels 0---
1:               xdreq1, channels -1--
2:                  sdi, channels 0123
3:                 spi0, channels -1--
4:                 spi1, channels ---3
5:                uart0, channels 0---
6:                uart1, channels -1--
7:                uart2, channels ---3
8:                timer, channels 0-23
9:              i2s-sdi, channels -12-
10:              i2s-sdo, channels 0-2-
11:               pcm-in, channels 0-2-
12:              pcm-out, channels -1-3
13:               mic-in, channels --23
14:              usb-ep1, channels 0---
15:              usb-ep2, channels -1--
16:              usb-ep3, channels --2-
17:              usb-ep4, channels ---3
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 2048 (order: 1, 8192 bytes)
TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
TCP: Hash tables configured (established 2048 bind 1024)
TCP reno registered
NetWinder Floating Point Emulator V0.97 (double precision)
JFFS2 version 2.2. (NAND) (C) 2001-2006 Red Hat, Inc.
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler deadline registered
io scheduler cfq registered

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