[PATCH] powerpc/4xx/ocm: fix compiler error

[christophe leroy]

Le 22/12/2018 à 18:16, Segher Boessenkool a écrit :
> On Sat, Dec 22, 2018 at 02:08:02PM +0100, christophe leroy wrote:
>>
>> Usually, Guarded implies no exec (at least on 6xx and 8xx).
> 
> Huh?  What do you mean here?
> 

 From the 885 Reference Manual:

Address translation: the EA is translated by using the MMU’s TLB 
mechanism. Instructions are not fetched from no-execute or guarded 
memory and data accesses are not executed speculatively to or from the 
guarded memory.

6.1.3.4 Instruction TLB Error Exception (0x01300)
This type of exception occurs as a result of one of the following 
conditions if MSR[IR] = 1:
- The EA cannot be translated.
- The fetch access violates memory protection
- The fetch access is to guarded memory


 From e300core reference manual:

Translation Exception Conditions:
Exception condition: Instruction fetch from guarded memory
with MSR[IR] = 1 ==> ISI interrupt SRR1[3] = 1


Christophe

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