[U-Boot] [PATCH 1/3] powerpc/p5040: enable NAND boot support

[Scott Wood <scottwood@freescale.com>]

On 01/15/2013 08:39:38 PM, Shaohui Xie wrote:
> Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
> ---
>  boards.cfg |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/boards.cfg b/boards.cfg
> index e4b0d44..8cf4936 100644
> --- a/boards.cfg
> +++ b/boards.cfg
> @@ -855,6 +855,7 @@ P5020DS_SECURE_BOOT          powerpc      
> mpc85xx     corenet_ds          freesca
>  P5020DS_SPIFLASH	     powerpc     mpc85xx      
> corenet_ds          freescale      -            
> P5020DS:RAMBOOT_PBL,SPIFLASH,SYS_TEXT_BASE=0xFFF80000
>  P5020DS_SRIO_PCIE_BOOT          powerpc     mpc85xx      
> corenet_ds          freescale      -            
> P5020DS:SRIO_PCIE_BOOT_SLAVE,SYS_TEXT_BASE=0xFFF80000
>  P5040DS                      powerpc     mpc85xx      
> corenet_ds          freescale
> +P5040DS_NAND		     powerpc     mpc85xx      
> corenet_ds          freescale      -            
> P5040DS:RAMBOOT_PBL,NAND,SYS_TEXT_BASE=0xFFF80000
>  BSC9131RDB_SPIFLASH          powerpc     mpc85xx      
> bsc9131rdb          freescale      -            
> BSC9131RDB:BSC9131RDB,SPIFLASH
>  stxgp3                       powerpc     mpc85xx      
> stxgp3              stx
>  stxssa                       powerpc     mpc85xx      
> stxssa              stx            -           stxssa

This needs more explanation.  What sort of image am I supposed to get  
when I build "P5040DS_NAND"?  Where is the PBI?

What is the long-term plan for fixing the problem of the environment  
not being available until after relocation?  With SPL we could use  
CONFIG_NAND_ENV_DST (which has some issues, but they're fixable).

It would also be nice to include instructions for configuring the board  
to boot from NAND in a README (Freescale's user manuals often do not  
make this clear, especially for soft configuration).  Also please  
provide a built-in command (or script in the default environment) to  
soft-boot into NAND (or if it already exists, please document it).

-Scott