mx31: external abort on non-linefetch (debugging suspend to RAM)

[Thomas Nemeth]

Le jeudi 14 octobre 2010, Xinyu Chen a écrit :
> On Tue, Oct 12, 2010 at 5:59 PM, Thomas Nemeth
>
> <thomas.nemeth at betatech.fr> wrote:
> > # insight -D ./iMX31-regs.defs -R CCMR
> > Unhandled fault: external abort on non-linefetch (0x008) at
> > 0x40000000 Bus error
> >
> >    On the MX31ADS the result is the following one :
> > mx31# ./insight -D iMX31-regs.defs -R CCMR
> > CCMR: 0x074B097D
>
> Hi Thomas

    Hi !


> The exception is caused by you accessing the 0x40000000 which has
> been remapped as peripheral port memory in bootloader.

    I'll have a look at 0x40000000 mapping in uboot. However, CCMR
    is located at 0x53F80000 and that's what I ask mmap to remap.
    How can a map request of 0x53F80000 trying to access 0x40000000 ?

    Is it a symptom that can explain my problems with suspend-to-ram ?


> As it's mapped, you can not access it by non privileged user.

    You mean "from user land" (instead of "from kernel space") ?


> Please check the c15, c2, 4 coprocessor register settings in
> bootloader.
>
> Thanks!

    Thanks to you :)


Thomas.
-- 
Thomas Nemeth - Ingénieur d'Études en Informatique Industrielle
                Industrial Computing Software Designer
BETAtech - 15, rue Apollo, Z.A. de Montredon, 31240, L'Union.
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