[U-Boot] [PATCH 1/2] [v3] powerpc/85xx: introduce and document CONFIG_SYS_CCSRBAR macros

[Kumar Gala]

On Aug 4, 2011, at 6:03 PM, Timur Tabi wrote:

> Introduce the CONFIG_SYS_CCSRBAR_PHYS_HIGH and CONFIG_SYS_CCSRBAR_PHYS_LOW
> macros, which contain the high and low portions of CONFIG_SYS_CCSRBAR_PHYS.
> This is necessary for the assembly-language code that relocates CCSR, since
> the assembler does not understand 64-bit constants.
> 
> CONFIG_SYS_CCSRBAR_PHYS is automatically defined from the
> CONFIG_SYS_CCSRBAR_PHYS_HIGH and CONFIG_SYS_CCSRBAR_PHYS_LOW macros, so it
> should not be defined in a board header file.  Similarly,
> CONFIG_SYS_CCSRBAR_DEFAULT is defined for each SOC in config_mpc85xx.h, so
> it should also not be defined in the board header file.
> 
> CONFIG_SYS_CCSR_DO_NOT_RELOCATE is a "short-cut" macro that guarantees that
> CONFIG_SYS_CCSRBAR_PHYS is set to the same value as CONFIG_SYS_CCSRBAR_DEFAULT,
> and so CCSR will not be relocated.
> 
> Since CONFIG_SYS_CCSRBAR_DEFAULT is locked to a fixed value, multi-stage U-Boot
> builds (e.g. NAND) are required to relocate CCSR only during the last stage
> (i.e. the "real" U-Boot).  All other stages should define
> CONFIG_SYS_CCSR_DO_NOT_RELOCATE to ensure that CCSR is not relocated.
> 
> README is updated with descriptions of all the CONFIG_SYS_CCSRBAR_xxx macros.
> 
> Signed-off-by: Timur Tabi <timur at freescale.com>
> ---

applied to 85xx next

- k