From: Nethra <nethra_gmit@yahoo.co.in>
To: linuxppc-embedded@ozlabs.org
Subject: Re: ask some questions about u-boot's bootm command
Date: Tue, 24 Jul 2007 04:41:34 -0700 (PDT) [thread overview]
Message-ID: <11761280.post@talk.nabble.com> (raw)
In-Reply-To: <200707221539215465156@163.com>
can u send me output of printenv in boot loader..?
Nethra
poorbeyond wrote:
>
> my cpu is 860T, using bootm command boot a linux kernel image, the
> following message print by smc1:
>
> bootm 300000
>
> ## Booting image at 00300000 ...
> Image Name: Linux-2.6.20.14
> Image Type: PowerPC Linux Kernel Image (gzip compressed)
> Data Size: 1081591 Bytes = 1 MB
> Load Address: 00100000
> Entry Point: 00100000
> Verifying Checksum ... OK
> Uncompressing Kernel Image ... OK
> ## Current stack ends at 0x01D5DB10 => set upper limit to 0x00800000
> No initrd
> ## Transferring control to Linux (at address 00100000) ...
>
>
>
> then, the program has no response.
>
> i debug it througth BDM, in u-boot function "do_bootm_linux", execute at
> "kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))hdr->ih_ep", the
> program branch to address "0x00000000", the code is shown as following:
> 00000000 mr r31,r3
> 00000004 mr r30,r4
> 00000008 mr r29,r5
> 0000000C mr r28,r6
> 00000010 mr r27,r7
> 00000014 bl 0x000020C8
> 00000018 mfmsr r0
> 0000001C ori r0,r0,0x30
> 00000020 mtspr SRR1,r0
> 00000024 lis r0,0xC0002004@h
> 00000028 ori r0,r0,0xC0002004@l
> 0000002C mtspr SRR0,r0
> 00000030 rfi
>
>
> my questions are:
>
> 1. Is the code "kernel = (void (*)(bd_t *, ulong, ulong, ulong,
> ulong))hdr->ih_ep" branch right?
>
> 2. What's the expected code after "kernel = (void (*)(bd_t *, ulong,
> ulong, ulong, ulong))hdr->ih_ep"?
>
> 3. When the kernel run to the "boot/simple/head.s"?
>
>
> thanks a lot
>
>
>
>
>
> poorbeyond
> 2007-07-22
>
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>
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prev parent reply other threads:[~2007-07-24 11:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-22 7:39 ask some questions about u-boot's bootm command poorbeyond
2007-07-24 11:41 ` Nethra [this message]
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