[coreboot] ASRock E350M1: Boot delay with debug enabled, system RAM reported incorrectly in Linux

Marshall Buschman mbuschman at lucidmachines.com
Sun Jun 19 19:45:10 CEST 2011

On 06/19/2011 02:33 AM, Marshall Buschman wrote:
> On 06/19/2011 02:17 AM, Marshall Buschman wrote:
>> On 06/19/2011 01:38 AM, Scott Duplichan wrote:
>>> Marshall Buschman wrote:
>>> ]Hello:
>>> ]
>>> ]With Scott's work on PCIe support for the E350M1, the NIC and USB3 are
>>> ]now working -- Thanks Scott!
>>> Thanks for testing it on both the boards. Good to hear it works.
>>> ]The remaining problems that I know of are:
>>> ]
>>> ]1) Enabling coreboot serial debugging slows system boot 
>>> dramatically: 5min+
>>> ]Someone mentioned in IRC that this is because we are attempting to 
>>> write
>>> ]to the serial device before it is ready, which causes some kind of
>>> ]timeout/backoff/retry sequence. How can I help with this?
>>> That is weird. The log file you sent is 38819 bytes. I would expect the
>>> boot time penalty to be not much more than the I/O time of 38819 
>>> bytes /
>>> (11520 bytes/second) = 3.37 seconds. I did a test with loglevel 8. 
>>> It logged
>>> 45745 bytes and the boot time from cold reset to DOS prompt was 5.56
>>> seconds. When I watch the serial output, it spews text nearly 
>>> continuously.
>>> There is no hardware or software handshaking for the writes, so nothing
>>> should slow it down.
>>> ]2) System RAM is reported incorrectly. In linux, "free -m" reports 
>>> 480mb
>>> ]of total RAM -- the full total is 4gb.
>>> I see, I had tested only a small memory configuration so far. It looks
>>> like any size greater than 4GB will fail. Try the attached patch.
>> Works great, 3.5gb of available RAM. I've submitted it into the 
>> review system.
>>> Thanks,
>>> Scott
>> Thanks again!
>> -Marshall
> Okay, There's something odd going on here. Now the NIC is gone. I'm 
> going to investigate in the morning and abandon the change in gerrit 
> until I know what's going on.
> -Marshall
Nevermind, it works - Apparently there are disadvantages to doing things 
that require thought in the very early hours of the morning. :|
-Marshall Buschman

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