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Re: [PATCH 0/7] arm-uboot: support for different RAM bases

From: Leif Lindholm
Subject: Re: [PATCH 0/7] arm-uboot: support for different RAM bases
Date: Sun, 29 Dec 2013 23:04:17 +0000
User-agent: Mutt/1.5.21 (2010-09-15)

Hi Ian,

On Sun, Dec 29, 2013 at 06:47:19PM +0000, Ian Campbell wrote:
> The current arm-uboot image type is hardcoded to run at address
> 0x08000000 which means that it cannot be used on ARM systems which do
> not have RAM starting from address 0 (which is many of them). This is a
> bit of a problem for distros.
> The following series attempts to address this by only performing a
> partial link of the arm-uboot kernel.img at build time and enhancing
> grub-mkimage to finalise the link to a specific address while building
> the core.img.

Good stuff.

> I have test this on a Midway system, which has RAM at address 0, linking
> to a variety of addresses (0x{0,1,4}8000000) and on a cubieboard2 which
> has RAM at 0x40000000-0x80000000 linked at 0x48000000. (there is an
> unrelated issue on cubieboard2 relating to the scan for the uboot API
> signature, which I'm still investigating, but I hacked around it here
> and things worked fine otherwise).

We can add BeagleBone Black to the list (0x88000000 and 0x90000000).
(Although I'm having issues actually booting Linux on it, which I
had when I just manually changed the link address, GRUB runs fine.)


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