[U-Boot] [PATCH] arc: Introduce a possibility to not relocate U-boot

[Simon Glass]

On 25 January 2018 at 11:22, Alexey Brodkin <Alexey.Brodkin at synopsys.com> wrote:
> From: Alexey Brodkin <Alexey.Brodkin at synopsys.com>
>
> Disabling relocation might be useful on ARC for 2 reasons:
>  a) For advanced debugging with Synopsys proprietary MetaWare debugger
>     which is capable of accessing much more specific hardware resources
>     compared to gdb. For example it may show contents of L1 and L2 caches,
>     internal states of some hardware blocks etc.
>
>     But on the downside MetaWare debugger still cannot work with PIE.
>     Even though that limitation could be work-arounded with change of ELF's
>     header and stripping down all debug info but with it we won't have
>     debug info for source-level debugging which is quite inconvenient.
>
>  b) Some platforms which might benefit from usage of U-Boot basically
>     don't have enough RAM to accommodate relocation of U-Boot so we
>     keep code in flash and use as much of RAM as possible for more
>     interesting things.
>
> Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
> Cc: Simon Glass <sjg at chromium.org>
> Cc: Bin Meng <bmeng.cn at gmail.com>
> Cc: Heiko Schocher <hs at denx.de>
> Cc: York Sun <york.sun at nxp.com>
> Cc: Stefan Roese <sr at denx.de>
> ---
>  arch/arc/lib/relocate.c | 6 ++++++
>  arch/arc/lib/start.S    | 8 +++++++-
>  common/board_f.c        | 3 ++-
>  3 files changed, 15 insertions(+), 2 deletions(-)

Reviewed-by: Simon Glass <sjg at chromium.org>