Uboot-V2: ARM: towards a common start-arm.S

-----Original Message-----
From: Peter Pearse [mailto:peter.pearse at arm.com]
Sent: 18 March 2008 09:32
To: 'Nishanth Menon'
Subject: RE: [U-Boot-Users] Uboot-V2: ARM: towards a common start-arm.S

Quoted 11 lines

-----Original Message-----
From: u-boot-users-bounces at lists.sourceforge.net [mailto:u-boot-users-bounces at lists.sourceforge.net] On Behalf Of Nishanth Menon
Sent: 17 March 2008 22:32
To: s.hauer at pengutronix.de; u-boot-users at lists.sourceforge.net
Subject: [U-Boot-Users] Uboot-V2: ARM: towards a common start-arm.S

Hi Sascha,

I think we dont have a seperate list for uboot-v2, so, just

wanted to

Quoted 1 line

know the opinion of having a single

arch/arm/cpu/start-arm.S instead

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of multiple start-arm files.
essentially providing hooks to arch,soc,board specific preinits can allow us to reuse major chunk of code..
I have attached a sample start-arm.S (modified from start-arm920t.S) as reference.

Great idea.

Two trivial points.

a) In the past confusion has arisen because the reset vector is so called. Some users thought the code after reset:
caused a reset, rather than running after the cpu has been reset. Could it be renamed start_code, as per current arm920t/start.S?

b) I dont believe that relocating the vector table to the reset address is ARCH or SOC dependent. It depends on TEXT_BASE and whether memory at the reset location is writeable. So it should be in your start.S somewhere, as per current arm920t/start.S.

Regards

Peter