From: <zengshuai@sogou.com>
To: "ppc" <linuxppc-embedded@ozlabs.org>
Subject: linuxppc-embedded help needed:kernel access of bad area
Date: Wed, 30 Nov 2005 16:18:06 +0800 (CST) [thread overview]
Message-ID: <15152217.1133338686341.JavaMail.postfix@mx3.mail.sohu.com> (raw)
i writed a led driver for PQ2FADS(a ppc board).
but i can't read/write 0x04500000 where led register addr locate in.
i tested two ways to do that.
first,
p=0x04500000;
*p=0x12;
....
second,
outb(0x12,0x04500000);
...
two ways both didn't work.they had a some wrong:kernel access of bad area.
how can i know which area is bad area or good area?
and what can i do next? thanks.
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next reply other threads:[~2005-11-30 8:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-30 8:18 zengshuai [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-11-30 9:33 linuxppc-embedded help needed:kernel access of bad area Fillod Stephane
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