External Non-Linefetch Abort (S)

[Rui Paulo]

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=00001008, FAR=d4a5c000, spsr=60000093
r0 =00000000, r1 =d4a5c000, r2 =00000000, r3 =c062a908
r4 =00000000, r5 =c08c5ce4, r6 =c1825500, r7 =c18eb700
r8 =ffffffff, r9 =c1825d80, r10=c1825500, r11=c05511e0
r12=00000015, ssp=c08c5cd0, slr=c052f1b0, pc =c050bf78

[ 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