From: Alex_SYS <schmid-grafenau@t-online•de>
To: linuxppc-embedded@ozlabs•org
Subject: LIME on MPC5200B ioremap problem
Date: Sat, 12 Jul 2008 06:48:12 -0700 (PDT) [thread overview]
Message-ID: <18419614.post@talk.nabble.com> (raw)
Hello,
I have an MPC5200B with Linux and an Grafic Chip Lime on the LPB !
The Lime is configured under U-Boot und works very fine in 800x480x16 bit
colors.
In Linux I adapted the Virtual Framebuffer driver! There are only three
things necessary:
1: check_mem (0xE0000000, 750kB) ->thats OK
2: io__mem_request(0xE0000000, 750kB) ->thats OK , too
3_ioremap(0xE0000000, 750kB) ->thats OK , too
3: write Io request to framebuffers screen_base
The Kernel with Grafics output works fine with 800x350 resolution or 580x480
and so on.
But when I use 800x480, the screen output is OK, But the kernel crashes with
custom trace stop.
I have found out that it must be a ioremap failure, because it has to do
with the space i request!
It works fine if the mem_remap is under 546kB! Exactly it is not the space,
but the upper adress!
Because ioremap(0xE00000860, 500kB) crashes also the Kernel!
It seems like ioremap can`t give me the adresses upper
(0xE00000000+546kB)=0xE00088B80 ?
What can be the problem?
Kernel 2.6.23-rt5 with 16MB Flash and 64MB RAM
Thanks very much!
--
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reply other threads:[~2008-07-12 13:48 UTC|newest]
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