Re: [PATCH 3/5] arm: initial support for Marvell Dove SoCs

From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: barebox@lists.infradead.org,
	Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Subject: Re: [PATCH 3/5] arm: initial support for Marvell Dove SoCs
Date: Mon, 13 May 2013 18:34:18 +0200	[thread overview]
Message-ID: <20130513183418.4f9ce9e2@skate> (raw)
In-Reply-To: <51911510.8050207@gmail.com>

Dear Sebastian Hesselbarth,

On Mon, 13 May 2013 18:30:08 +0200, Sebastian Hesselbarth wrote:

> > No, I did not test that, it was just a supposition from me that it
> > would work. I was under the impression that the SoC would load the
> > entire image in SRAM, and then go through the DATA commands and
> > apply them. But of course, if it does apply each and every DATA
> > command as soon as it receives them, then it cannot work, and
> > Barebox will have to do its remapping and give up the possibility
> > of being booted by itself.
> 
> Hmm, Dove spec says about BootROM Address Decoding:
> "BootROM firmware uses the default address map, and does not change it
> throughout the entire boot process."
> 
> And of course, if you change the address map early, BootROM will fail
> to access peripherals (SPI, I2C, NAND, ...).
> 
> Remap by kwbimage.cfg looks like a no-go.

Looks like, yes. Thanks for the testing and investigation!

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

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