[coreboot] The problem of coreboot porting to fu540

王翔 merle at tya.email
Tue Dec 11 04:17:09 CET 2018


This is the code used to exits M-Mode.
hart0 was paused before , because hart0 does not support S-Mode and cannot run kernel code.
So there is no status information for hart0.


------------------



王翔

安全研究员

广州市腾御安信息科技有限公司





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 This is the code used to exits M-Mode. hart0 was paused before , because  hart0 does not support S-Mode and cannot run kernel code.

------------------ Original ------------------This is the code used to exits M-Mode. hart0 was paused before , because  hart0 does not support S-Mode and cannot run kernel code.

From:  "Jonathan Neuschäfer"<j.neuschaefer at gmx.net>;This is the code used to exits M-Mode. hart0 was paused before , because  hart0 does not supThis is the code used to exits M-Mode. hart0 was paused before , because  hart0 does not support S-Mode and cannot run kernel code.
port S-Mode and cannot run kernel code.This is the code used to exits M-Mode. hart0 was paused before , because  hart0 does not support S-Mode and cannot run kernel code.

Date:  Mon, Dec 10, 2018 07:16 PMThis is the code used to exits M-Mode. hart0 was paused before , because  hart0 does not support S-Mode and cannot run kernel code.

To:  "王翔"<merle at tya.email>; 
Cc:  "coreboot"<coreboot at coreboot.org>; "j.neuschaefer"<j.neuschaefer at gmx.net>; "philipp"<philipp at hug.cx>; "citypw"<citypw at gmail.com>; This is the code used to exits M-Mode. hart0 was paused before , because  hart0 does not support S-Mode and cannot run kernel code.

Subject:  Re: The problem of coreboot porting to fu540

 
Hi,

On Mon, Dec 10, 2018 at 05:29:44PM +0800, 王翔 wrote:This is the code used to exits M-Mode. hart0 was paused before , because  hart0 does not support S-Mode and cannot run kernel code.
This is the code used to exits M-Mode. hart0 was paused before , because  hart0 does not support S-Mode and cannot run kernThis is the code used to exits M-Mode. hart0 was paused before , because  hart0 does not support S-Mode and cannot run kernel code.
el code.

> I use bbl as the coreboot's payload, bbl can start and running into the enter_supervisor_mode function, but can't continue. This is the code used to exits M-Mode. hart0 was paused before , because  hart0 does not support S-Mode and cannot run kernel code.

> 
> I added some code to print register state before mret and print memory on target address.
> I debugged it for a long time and didn't know where the problem was. hoping to get your help.
> 
> 
> Below is my output:
> 
> ```
> 
> mhartid  : 2
[...]
> mhartid  : 1
[...]
> mhartid  : 3
[...]
> mhartid  : 4
[...]


My first guess is that BBL is waiting for Hart 0, but I have not looked
at BBL's code to verify that this could be the case.


Jonathan
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