From: "旭 罗" <luoxu_gun@yahoo•com.cn>
To: linuxppc-dev@ozlabs•org
Subject: a question about use dtb to bootting linux kernel on MPC83xx platform
Date: Mon, 7 Apr 2008 09:35:17 +0800 (CST) [thread overview]
Message-ID: <959437.18740.qm@web15907.mail.cnb.yahoo.com> (raw)
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I am Linux software engineer. These days I was debugging a MPC8313 system. In the debugging process, some source code in the kernel makes me puzzled. So I have find your email address in the source code. I think you can give me some advises to solve the problem.
My version is linux-2.6.23.9 and I use the device tree(dtb) to booting the kernel. In my bootloader I use the following code to jump to the kernel.
(*image)((bd_t *)dtb_entry, (unsigned int)image, 0, 0, 0);
The dtb_entry is the address of dtb file which in the SDRAM, the image is the kernel entry point. I flashed some LEDs in my board. So I can make sure the program run to the machine_init() which is defined in the /arch/powerpc/kernel/setup_32.c
In order to trace the problem I search the source code. I can find that these information is printed by the start function which is defined in the /arch/powerpc/boot/main.c.
Fourth more I have found that the kernel call the platform_init which is defined in the /arch/powerpc/boot/cuboot-83xx.c. looking the file head I have known you are the author for this file.
Could you told me how the kernel call the platform_init function and I hope you can show me the booting process of the MPC83xx linux or you could give me some document about it.
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雅虎邮箱，您的终生邮箱！
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next reply other threads:[~2008-04-07 1:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-07 1:35 旭 罗 [this message]
2008-04-07 16:38 ` a question about use dtb to bootting linux kernel on MPC83xx platform Scott Wood
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