Question about Raspberry Pi bspstarthooks.c - potential patch

[Sebastian Huber]

On 29/06/2021 21:09, Alan Cudmore wrote:
>> On 29/06/2021 20:56, Alan Cudmore wrote:
>>> I understand the move in that commit now.
>>> Maybe it's not working on the single core models because the code is
>>> conditional for ARMV7 + A or ARMV8?
>>> https://git.rtems.org/rtems/tree/bsps/arm/shared/start/start.S#n485
>>> I think the single core RPIs are ARM1176JZF-S (ARMv6Z).
>> Oh, yes, this is probably the problem. I wasn't aware that we have a BSP
>> which uses Armv6. I will try to figure out the right options.
> Thanks! As soon as you have something that would work, we can test it.
> The CPU architecture is old, but it looks like these models will be in
> production until at least 2026.

I didn't find an Armv6 Reference Manual, so I have no idea if this works 
for all Armv6 systems (the only one in RTEMS is probably the Raspberry Pi)

diff --git a/bsps/arm/shared/start/start.S b/bsps/arm/shared/start/start.S
index 698495d32e..028bef6d2d 100644
--- a/bsps/arm/shared/start/start.S
+++ b/bsps/arm/shared/start/start.S
@@ -482,7 +482,8 @@ bsp_start_hook_0_done:

  .Lvector_table_copy_done:

-#if (__ARM_ARCH >= 7 && __ARM_ARCH_PROFILE == 'A') || __ARM_ARCH >= 8
+#if __ARM_ARCH == 6 || (__ARM_ARCH >= 7 && __ARM_ARCH_PROFILE == 'A') || \
+  __ARM_ARCH >= 8
         /*
          * This code path is only executed by the primary processor. 
Set the
          * VBAR to the normal vector table.  For secondary processors, 
this is


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