Hi May,
I just wanted to expand on your finding. On Rangeley, the USB
buffers MUST be pushed low because the USB controller isn't allowed to
write into the 0xe0000 - 0xfffff area. The processor is the only device
that can write to that area. The restricted area might be larger - I
can't recall. This restriction on Rangeley is the main reason that the
MALLOC_UPPERMEMORY option exists in SeaBIOS. (Thanks Kevin.)
Martin
On 01/13/2015 06:21 PM, May Park wrote:
Hey Werner,
Thanks for the reply.
I found what's wrong with my build for my Rangeley CRB, the usb issue
is caused by memory allocation, have to disable
23 #CONFIG_MALLOC_UPPERMEMORY=y
in SeaBIOS .config file.
all the USB devices work.
And also thanks to Kuzmichev Viktor, for his long log in which I found
this little clue.
thank you all :)
May
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