[U-Boot] [PATCH v2] mx25: Fix boot hang by avoiding vector relocation

[Tom Rini <trini@ti.com>]

On Tue, Jan 06, 2015 at 01:06:48PM -0200, Fabio Estevam wrote:

> From: Fabio Estevam <fabio.estevam@freescale.com>
> 
> Since commit 3ff46cc42b9d73d0 ("arm: relocate the exception vectors") mx25pdk
> hangs like this:
> 
> CPU:   Freescale i.MX25 rev1.2 at 399 MHz
> Reset cause: WDOG
> Board: MX25PDK
> I2C:   ready
> DRAM:  64 MiB
> (hangs)
> 
> Add a specific relocate_vectors macro that skips the vector relocation, as the 
> i.MX25 SoC does not provide RAM at the high vectors address (0xFFFF0000), and
> (0x00000000) maps to ROM.
> 
> This allows mx25 to boot again.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

I'd like to pull this in for the release.  I'd also really like someone
else to ack or otherwise comment on this (and why this is more right
than not just relocating the vectors as v1 did, I see both boot to a
U-Boot prompt but shouldn't we do a bit more testing to confirm that we
don't need to relocate these exception vectors or have we now introduced
some subtle breakage (or perhaps not so subtle once you hit it) in these
cases?  Thanks!

-- 
Tom
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