Booting Linux without bootloader on Sandpoint X3 with PPC755 CPU, Montavista Linux

Booting Linux without bootloader on Sandpoint X3 with PPC755 CPU, Montavista Linux

[dong in kang]

 Hello,

 I try to boot MontaVista Linux on Sandpoint X3 with PPC755 CPU.
I make zImage.initrd for Sandpoint X3, and loaded it on the SDRAM at
0x800000.
I used bdi to initialize memory controller and load the binary image of
zImage.initrd on the SDRAM.
Although I don't use bootloader, I can read/write SDRAM without any problem.
The only change I made is memory size change in
arch/ppc/platform/sandpoint_setup.c file

 size = 128*1024*1024;   /* 128 M bytes */

I also changed the size of memory in the boot parameters.

 However, the Linux doesn't seem to boot properly.
The serial line keeps silent.
It keeps running. When I halt the running with bdi, it is in
"emit_log_char".
Could anybody tell me what's possibly wrong?

 Thanks,

 Dong-In

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Re: Booting Linux without bootloader on Sandpoint X3 with PPC755 CPU, Montavista Linux

[Mark A. Greer]

Dong-In,

This has come up and been answered several times before.  Please search
the linuxppc-embedded and linuxppc-dev mail archives.

Mark
--

dong in kang wrote:

> Hello,
>
> I try to boot MontaVista Linux on Sandpoint X3 with PPC755 CPU.
>I make zImage.initrd for Sandpoint X3, and loaded it on the SDRAM at
>0x800000.
>I used bdi to initialize memory controller and load the binary image of
>zImage.initrd on the SDRAM.
>Although I don't use bootloader, I can read/write SDRAM without any problem.
>The only change I made is memory size change in
>arch/ppc/platform/sandpoint_setup.c file
>
> size = 128*1024*1024;   /* 128 M bytes */
>
>I also changed the size of memory in the boot parameters.
>
> However, the Linux doesn't seem to boot properly.
>The serial line keeps silent.
>It keeps running. When I halt the running with bdi, it is in
>"emit_log_char".
>Could anybody tell me what's possibly wrong?
>
> Thanks,
>
> Dong-In
>
>
>
>
>
>


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Re: Re[4]: initrd problem. CRC Error.

[Wolfgang Denk]

In message <E19PMLT-000Hhi-00.xol-mail-ru@f16.mail.ru> you wrote:
>
> I think I found out what is a problem
> The thread bi_record and initrd
> http://lists.linuxppc.org/linuxppc-embedded/200211/msg00286.html
>
> Discuss the problem of corrupting initrd by bi_record - board info record.
> As I have no good background in bootloading could you please let me know
> 1. What is a current status of fixing the bug. Are there any
> new kernel version there it was fixed

Don't know. Never ran into this problem.

> 2. Does this problem depends on bootloader. Will u-boot fix it?

Yes, it probably depends on the bootloader. More exactly, itt depends
on the interface between the bootloader and the Linux kernel.

U-Boot works fine if your kernel is configured for U-Boot. I  am  not
aware of a problem that needs fixing.

> 3. Does anybody succeded to use 2.4.18 with initrd? How?

Yes, we did. Many times. We use  U-=Boot,  and  make  sure  that  the
kernel interface fits.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
"That unit is a woman."
"A mass of conflicting impulses."
	-- Spock and Nomad, "The Changeling", stardate 3541.9

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