From: Graeme Russ <graeme.russ@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] arm: add 8-byte alignment for ABI compliance before board_init_f
Date: Fri, 12 Nov 2010 20:47:11 +1100 [thread overview]
Message-ID: <4CDD0D1F.7010805@gmail.com> (raw)
In-Reply-To: <20101112085013.62415193@gemini.denx.de>
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
next prev parent reply other threads:[~2010-11-12 9:47 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-12 6:53 [U-Boot] [PATCH] arm: add 8-byte alignment for ABI compliance before board_init_f Heiko Schocher
2010-11-12 7:06 ` Reinhard Meyer
2010-11-12 7:19 ` Heiko Schocher
2010-11-12 8:04 ` Albert ARIBAUD
2010-11-12 8:50 ` Graeme Russ
2010-11-12 8:50 ` Wolfgang Denk
2010-11-12 9:47 ` Graeme Russ [this message]
2010-11-12 9:56 ` Wolfgang Denk
2010-11-12 7:53 ` Albert ARIBAUD
2010-11-12 8:05 ` Heiko Schocher
2010-12-08 22:50 ` Wolfgang Denk
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