7DE0 0014 C01A5AC0
GPR08: 0450 000C C01A 30025CE8 10018B5C
GPR16: 9032 006B1F40 C0003E88
GPR24: C0003BE0 0001 1500 7EA4 7DE0 FFEA C01A5AA0 0014
Call backtrace:
1A1C C003A310
> -Original Message-
> From: zengshuai at sogou.com
> Sent: Thursday, December 01, 2005 00:52
> #define BCSRADDR 0x0450
This address is wrong.
It's the address the manual gives, but the bootloadre usually moves it
because it interferes with the SDRAM when running Linux.
Check the bootl
Hello,
> #define BCSRADDR 0x0450
>
...
> static int PQ2FADS_GPL_open(struct inode *inode,struct file *filp)
> {
> PQ2FADS_GPL_CSR=(PQ2FADS_BCSR*)BCSRADDR;
possible you have to change physical address to logical see ioremap.
achim
tion fault
#
--
> ---
> From: zengshuai at sogou.com
> To: ppc
> Subject: linuxppc-embedded help needed:kernel access of bad area
> Sent: Wed Nov 30 16:18:06 CST 2005
>
> > i writed a led driver for PQ2
i writed a led driver for PQ2FADS(a ppc board).
but i can't read/write 0x0450 where led register addr locate in.
i tested two ways to do that.
first,
p=0x0450;
*p=0x12;
second,
outb(0x12,0x0450);
...
two ways both didn't work.they had a some wrong:kernel access of bad area.
how can
Dear zengshuai,
zengshuai at sogou.com wrote:
> i writed a led driver for PQ2FADS(a ppc board).
> but i can't read/write 0x0450 where led register addr locate in.
> i tested two ways to do that.
> first,
> p=0x0450;
> *p=0x12;
>
> second,
> outb(0x12,0x0450);
> ...
> two ways both
