[U-Boot] [U-Boot, v3] board_init: Change the logic to setup malloc_base

[Tom Rini]

On Thu, Nov 12, 2015 at 12:30:19PM -0200, Fabio Estevam wrote:

> Prior to commit 5ba534d247d418 ("arm: Switch 32-bit ARM to using generic
> global_data setup") we used to have assembly code that configured the
> malloc_base address.
> 
> Since this commit we use the board_init_f_mem() function in C to setup
> malloc_base address.
> 
> In board_init_f_mem() there was a deliberate choice to support only 
> early malloc() or full malloc() in SPL, but not both. 
> 
> Adapt this logic to allow both to be used, one after the other, in SPL.
> 
> This issue has been observed in a Congatec board, where we need to
> retrieve the manufacturing information from the SPI NOR (the SPI API 
> calls malloc) prior to configuring the DRAM. In this case as malloc_base
> was not configured we always see malloc to fail.
> 
> With this change we are able to use malloc in SPL prior to DRAM gets 
> initialized.
> 
> Also update the CONFIG_SYS_SPL_MALLOC_START entry in the README file.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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