Re: [Qemu-devel] [PATCH] Fix PReP NIP reset value

[Fabien Chouteau <chouteau@adacore.com>]

On 04/30/2013 05:24 PM, Alexander Graf wrote:
> On 04/30/2013 05:07 PM, Fabien Chouteau wrote:
>> The value was changed by the "PPC: fix hreset_vector..." patch.
>>
>> Signed-off-by: Fabien Chouteau<chouteau@adacore.com>
>> ---
>>   hw/ppc/prep.c |    3 +++
>>   1 file changed, 3 insertions(+)
>>
>> diff --git a/hw/ppc/prep.c b/hw/ppc/prep.c
>> index cceab3e..2d0c4fe 100644
>> --- a/hw/ppc/prep.c
>> +++ b/hw/ppc/prep.c
>> @@ -427,6 +427,9 @@ static void ppc_prep_reset(void *opaque)
>>       PowerPCCPU *cpu = opaque;
>>
>>       cpu_reset(CPU(cpu));
>> +
>> +    /* Reset address */
>> +    cpu->env.nip = 0xfffffffc;
> 
> Why does PREP reset at this vector? Is it architected to that? Does 601 reset to that offset?
> 

I don't know why PReP reset here. As I said in the hreset_vector patch,
even if the core manual says that hreset is at 0xfff00100, the value is
in fact board specific. OpenHackWare expects 0xfffffffc as reset
address.

-- 
Fabien Chouteau