From mboxrd@z Thu Jan  1 00:00:00 1970
From: Graeme Russ <graeme.russ@gmail.com>
Date: Fri, 12 Nov 2010 20:47:11 +1100
Subject: [U-Boot] [PATCH] arm: add 8-byte alignment for ABI compliance
 before board_init_f
In-Reply-To: <20101112085013.62415193@gemini.denx.de>
References: <1289544835-24425-1-git-send-email-hs@denx.de>	<4CDCE769.8080209@emk-elektronik.de>
	<20101112085013.62415193@gemini.denx.de>
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On 12/11/10 19:50, Wolfgang Denk wrote:
> Dear Reinhard Meyer,
> 
> In message <4CDCE769.8080209@emk-elektronik.de> you wrote:
>>
>> Is bootflag ever used? If not, why not change the parameter to
>> give the gd address to board_init_f?
> 
> No, bootflag is never used and could / should be removed.
> 
> Passing gd as parameter makes no sense, thoug, as it's global data and
> we reserve a register to store it's address, so it can always be used
> with minimal overhead.

Which is a really nice idea if you have a register to spare. Unfortunately,
x86 does not have this luxury, and the only way I can get gd (and as a
consequence upper memory bound for relocation) is to allocate it in
assembler and pass to C as a function argument

Regards,

Graeme