[U-Boot] [PATCH][v2] board/p1_p2_rdb:Enable p1_p2_rdb boot from NAND/SD/SPI in SPL

[York Sun <yorksun@freescale.com>]

On 05/15/2014 04:13 AM, Prabhakar Kushwaha wrote:
> In the earlier patches, the SPL/TPL fraamework was introduced.
> For SD/SPI flash booting way, we introduce the SPL to enable a loader stub. The
> SPL was loaded by the code from the internal on-chip ROM. The SPL initializes
> the DDR according to the SPD and loads the final uboot image into DDR, then
> jump to the DDR to begin execution.
> 
> For NAND booting way, the nand SPL has size limitation on some board(e.g.
> P1010RDB), it can not be more than 4KB, we can call it "minimal SPL", So the
> dynamic DDR driver doesn't fit into this minimum SPL. We added the TPL that is
> loaded by the the minimal SPL. The TPL initializes the DDR according to the SPD
> and loads the final uboot image into DDR,then jump to the DDR to begin execution.
> 
> This patch enabled SPL/TPL for P1_P2_RDB to support starting from NAND/SD/SPI
> flash with SPL framework and initializing the DDR according to SPD in the SPL/TPL.
> Because the minimal SPL load the TPL to L2 SRAM and the jump to the L2 SRAM to
> execute, so the section .resetvec is no longer needed.
> 
> Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
> ---
>  Changes for v2: Incroporated York' comments


Applied to u-boot-mpc85xx/master.

York