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From: Rui Paulo <rpaulo@felyko.com>
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Subject: External Non-Linefetch Abort (S)
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Date: Sat, 27 Jul 2013 20:33:18 -0700
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On the BeagleBone, I'm trying to access this address 0x4a300000. I know =
there is a device there (the PRUSS) and I should be able to access it, =
but instead I get this data abort trap:

Fatal kernel mode data abort: 'External Non-Linefetch Abort (S)'
trapframe: 0xc08c5c84
FSR=3D00001008, FAR=3Dd4a5c000, spsr=3D60000093
r0 =3D00000000, r1 =3Dd4a5c000, r2 =3D00000000, r3 =3Dc062a908
r4 =3D00000000, r5 =3Dc08c5ce4, r6 =3Dc1825500, r7 =3Dc18eb700
r8 =3Dffffffff, r9 =3Dc1825d80, r10=3Dc1825500, r11=3Dc05511e0
r12=3D00000015, ssp=3Dc08c5cd0, slr=3Dc052f1b0, pc =3Dc050bf78

[ thread pid 0 tid 100000 ]
Stopped at      generic_bs_r_4: ldr     r0, [r1, r2]

It looks like 0xd4a5c000 is the virtual address that points to =
0x4a300000 (I checked with vtophys()).

Does anyone know what this problem could be? I made sure the clock for =
this device are running.

--
Rui Paulo