Re: [Qemu-devel] [PATCH 2/2] PPC: fix hreset_vector for 60x, 7x0, 7x5, G2, MPC8xx, MPC5xx, 7400 and 7450

[Fabien Chouteau]

On 04/02/2013 10:09 AM, Alexander Graf wrote:
> 
> On 29.03.2013, at 13:06, Fabien Chouteau wrote:
> 
>> According to the different user's manuals, the vector offset for system
>> reset (both /HRESET and /SRESET) is 0x00100.
>>
>> This patch may break support of some executables, as the power-on start
>> address may change. For a specific board, if the power-on start address
>> is different than HRESET vector (i.e. 0x00000100 or 0xfff00100), this
>> should be fixed in board's initialization code.
>>
>> Signed-off-by: Fabien Chouteau <address@hidden>
> 
> What about the other users of hreset_vector? Can we just remove the variable 
> altogether?
>

For the CPUs that don't implement MSR[IP], the hreset_prefix is always
0x00000000, so hreset_vector will be the reset address (i.e. 0xFFFFFFFC)

I guess all this can be converted to a CPU feature flag, telling if
reset is an exception or not.

-- 
Fabien Chouteau