[U-Boot] [PATCH] ARM: socfpga: Increase Malloc pool size to support FAT filesystem in SPL

[Chee, Tien Fong <tien.fong.chee@intel.com>]

On Fri, 2019-01-18 at 07:23 +0100, Marek Vasut wrote:
> On 1/17/19 7:57 AM, tien.fong.chee at intel.com wrote:
> > 
> > From: Tien Fong Chee <tien.fong.chee@intel.com>
> > 
> > This is minimum memory pool size required to get SPL booting to U-
> > Boot,
> > such as FPGA program and loading U-Boot image from FAT.
> Rather, this is the minimal size needed for FAT to work ? But then ,
> maybe you should just set the malloc area size a bit bigger to have
> some
> headroom available.
Yes, the is minimal size based on that series of FPGA program patches.
How much you think we should increase?
> 
> How did you come to the number 0x12000 ? Did you do some measurements
> ?
Yup, after applying these patches:
1. https://www.mail-archive.com/u-boot at lists.denx.de/msg313259.html -
Saving 84kIB max cluster block from excludng both fat write and EXT4 in
SPL.

2. https://www.mail-archive.com/u-boot at lists.denx.de/msg312340.html
Maximise reusable from memory pool, so the amount required for mmeory
pool can be reduced to only (1 max cluster size[0x100000] + other than
max cluster size[0x2000]), total is 0x12000.

> 
> > 
> > Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
> > ---
> >  include/configs/socfpga_common.h |    2 +-
> >  1 files changed, 1 insertions(+), 1 deletions(-)
> > 
> > diff --git a/include/configs/socfpga_common.h
> > b/include/configs/socfpga_common.h
> > index bd8f5c8..93273a8 100644
> > --- a/include/configs/socfpga_common.h
> > +++ b/include/configs/socfpga_common.h
> > @@ -258,7 +258,7 @@ unsigned int
> > cm_get_qspi_controller_clk_hz(void);
> >  #if defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
> >  /* SPL memory allocation configuration, this is for FAT
> > implementation */
> >  #ifndef CONFIG_SYS_SPL_MALLOC_START
> > -#define CONFIG_SYS_SPL_MALLOC_SIZE	0x00010000
> > +#define CONFIG_SYS_SPL_MALLOC_SIZE	0x00012000
> >  #define CONFIG_SYS_SPL_MALLOC_START	(CONFIG_SYS_INIT_RAM_SI
> > ZE - \
> >  					 CONFIG_SYS_SPL_MALLOC_SIZ
> > E + \
> >  					 CONFIG_SYS_INIT_RAM_ADDR)
> > 
>