[U-Boot] [PATCH v2 17/50] x86: broadwell: Allow SDRAM init from SPL

[Bin Meng]

On Fri, Apr 26, 2019 at 12:00 PM Simon Glass <sjg at chromium.org> wrote:
>
> At present, for broadwell, SDRAM is always set up in U-Boot proper since
> the 64-bit mode (which uses SDRAM init in SPL) is not supported.
>
> Update the code to allow SDRAM init in SPL instead so that U-Boot proper
> can be loaded into SDRAM and run from there. This allows U-Boot to be
> compressed to reduce space, since it is not necessary to run it directly
> from flash. It could later allow us to support 64-bit U-Boot on broadwell.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
>
> Changes in v2:
> - Update commit message to make it clear this patch is just for broadwell
> - Bring in sdram_console_tx_byte() to allow debugging
>
>  arch/x86/cpu/broadwell/Makefile      |   2 +-
>  arch/x86/cpu/broadwell/northbridge.c | 100 +++++++++++++++++++++++++++
>  arch/x86/cpu/broadwell/sdram.c       |  93 -------------------------
>  3 files changed, 101 insertions(+), 94 deletions(-)
>

Reviewed-by: Bin Meng <bmeng.cn at gmail.com>