[U-Boot] [PATCH v4 0/4] Factorize ARM relocate_code instances

[Benoît Thébaudeau]

Hi Fabio, Stefano,

On Monday, May 20, 2013 11:26:10 AM, Albert ARIBAUD wrote:
> Hi Benoît,
> 
> On Sun, 19 May 2013 17:57:59 +0200 (CEST), Benoît Thébaudeau
> <benoit.thebaudeau at advansee.com> wrote:
> 
> > Hi Albert,
> > 
> > On Sunday, May 19, 2013 1:48:11 PM, Albert ARIBAUD wrote:
> > > This series replaces all instances of relocate_code in
> > > various start.S files from the ARM architecture with a
> > > single instance in arch/arm/lib/relocate.S.
> > > 
> > > This is done in steps, each step keeping the whole of ARM
> > > U-Boot buildable and runnable and touching as little code
> > > as necessary.
> > > 
> > > 1. Drop mx31pdk SPL call to relocate_code
> > > 
> > > In SPL of mx31pdk, board_init_f calls relocate_code to
> > > move SPL from the NAND read buffer to SRAM. This move
> > > is not a relocation and is thus better implemented as
> > > a simple ad hoc copy loop.
> > > 
> > > 2. Drop tx25 SPL call to relocate_code
> > > 
> > > Same as mx31pdk.
> > > 
> > > 3. Prevent all SPLs from assembling relocate_code
> > > 
> > > Now that no SPL uses relocate_code any more, remove
> > > it completely from SPL builds by putting it entirely
> > > between #ifndef CONFIG_SPL_BUILD and #endif preprocessor
> > > conditional.
> > > 
> > > 4. Actual factorization of relocate_code
> > > 
> > > Remove all instances of relocate_code from start.S and
> > > create a new file, arch/arm/lib/relocate.S, to provide
> > > the new single instance of relocate_code.
> > > 
> > > The only non-trivial change is that for PXA25X, a call
> > > to unlock (actually disable) dcache is moved from before
> > > relocating to after relocating. As this cache is either
> > > locked-as-RAM or disabled, but never used as actual DDR
> > > cache, this move has no performance effect on relocation
> > > and no functional impact either.
> > > 
> > > The relocation routine was step-tested on versatileqemu
> > > under gdb. Especially, both relocation offset (from
> > > _start to addr_moni and local offsets (from relocate_code
> > > to several linker script symbols) have been verified.
> > > 
> > > Changes in v4:
> > > - added blank line after PXA25X conditional code
> > > - fixed typos in relocate_code comments
> > > - brought back 'mov pc,lr' instead of 'bx lr' for ARMv4
> > 
> > [...]
> > 
> > Perfect!
> > 
> > For this v4 series:
> > Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau at advansee.com>
> 
> Thanks Benoît!
> 
> Now I need some people to regression-test it on their
> HW, both ARM and non-ARM just in case.

Can you test this series on mx31pdk (directly changed by this series), and some
other i.MX EVK (e.g. ARMv7, so mx51evk or mx53*) board please? That should be
enough for ARM.

Best regards,
Benoît