linux hangs after MMU:mapin

linux hangs after MMU:mapin

[nagraj c]

Hi all,

      "Wish You A Happy New Year".

      I am trying to port Linux on PPC405GP. I have downloaded
linuxppc_2_4_devel using BitKeeper and compiled using powerpc-linux- tools.
And I followed the following steps to compile kernel.
      make walnut_config
      make mrproper
      make menuconfig
      make dep
      make uImage

      After exucuting final step, vmlinux.UBoot has been created in
/linuxppc_2_4_devel/arch/ppc/boot/images.
      Boot Loader: I am using U-BOOT-0.4.0 as a boot loader.
      Board: Custom Board with IBM walnut405 features.

      U-BOOT is working fine. I have downloaded vmlinux.UBoot into 0x400000
memory location using tftp command. After I boot linux using command bootm
400000, it hangs after
PPC:> bootm 400000
## Booting image at 00400000 ...
   Image Name:   Linux-2.4.23
   Created:      2003-12-23  10:11:20 UTC
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    258050 Bytes = 252 kB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
id mach(): done
MMU:enter
MMU:hw init
MMU:mapin

        What could be the problem? Any suggestions are apreciated.

        My board info is as follows:

PPC:> bd_info
memstart    = 0x00000000
memsize     = 0x04000000
flashstart  = 0xFFF80000
flashsize   = 0x00480000
flashoffset = 0x0002D000
sramstart   = 0x00000000
sramsize    = 0x00000000
bootflags   = 0x0000A000
procfreq    = 266.660 MHz
plb_busfreq = 133.330 MHz
pci_busfreq = 33.332 MHz
ethaddr     = 00:01:01:01:01:01
IP addr     = 192.168.0.204
baudrate    = 9600 bps
	And environment variables are set as follows:
PPC:> printenv
bootcmd=bootm F0400000
loads_echo=1
ethaddr=00:01:01:01:01:01
bootdelay=50
filesize=80000
ipaddr=192.168.0.204
serverip=192.168.0.65
baudrate=115200
bootflags=0x00000001
bootargs=root=/dev/ram0 rw
stdin=serial
stdout=serial
stderr=serial

Environment size: 238/65532 bytes

With Best Regards,
Nag

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Re: linux hangs after MMU:mapin

[Wolfgang Denk]

Dear Nag,

in message <Law15-F93QzWsfdg29l00008f3e@hotmail.com> you wrote:
>
>       I am trying to port Linux on PPC405GP. I have downloaded
> linuxppc_2_4_devel using BitKeeper and compiled using powerpc-linux-
> tools. And I followed the following steps to compile kernel.
>       make walnut_config
>       make mrproper
>       make menuconfig
>       make dep
>       make uImage
>
>       After exucuting final step, vmlinux.UBoot has been created in
> /linuxppc_2_4_devel/arch/ppc/boot/images.
>       Boot Loader: I am using U-BOOT-0.4.0 as a boot loader.
>       Board: Custom Board with IBM walnut405 features.

Did you adapt the kernel sources (1) for use with U-Boot? [The struct
board_info  as  defined  in  "arch/ppc/platforms/walnut.h"   is   not
compatible to U-Boot] and (2) for use with your hardware [Your custom
board is probably not exactly identical to the Walnut.]

>         What could be the problem? Any suggestions are apreciated.

See http://www.denx.de/twiki/bin/view/DULG/LinuxHangsAfterUncompressingKernel

Best regards, and a Happy New Year!

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
We have found all life forms in the galaxy are  capable  of  superior
development.
	-- Kirk, "The Gamesters of Triskelion", stardate 3211.7

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