[U-Boot] [PATCH v2 15/19] arm: socfpga: Add support to memory allocation in SPL

[Chee, Tien Fong]

On Isn, 2017-09-25 at 11:21 +0200, Marek Vasut wrote:
> On 09/25/2017 10:40 AM, tien.fong.chee at intel.com wrote:
> > 
> > From: Tien Fong Chee <tien.fong.chee at intel.com>
> > 
> > Add support to memory allocation in SPL for preparation to enable
> > FAT
> > in SPL. Memory allocation is needed by FAT to work properly.
> > 
> > Signed-off-by: Tien Fong Chee <tien.fong.chee at intel.com>
> Gen 5 does have malloc support in SPL, so what's the deal here ?
> 
For FAT to work properly in Arria 10 SPL, SPL malloc need to be
enabled, and the min of SPL malloc size is 0x2000. FAT needed in Arria
10 SPL, because u-boot.img is stored in FAT partition.
> > 
> > ---
> >  include/configs/socfpga_common.h | 23 ++++++++++++++++++++++-
> >  1 file changed, 22 insertions(+), 1 deletion(-)
> > 
> > diff --git a/include/configs/socfpga_common.h
> > b/include/configs/socfpga_common.h
> > index 7549ee8..9b6719e 100644
> > --- a/include/configs/socfpga_common.h
> > +++ b/include/configs/socfpga_common.h
> > @@ -280,17 +280,34 @@ unsigned int
> > cm_get_qspi_controller_clk_hz(void);
> >  /*
> >   * SPL
> >   *
> > - * SRAM Memory layout:
> > + * SRAM Memory layout for gen 5:
> >   *
> >   * 0xFFFF_0000 ...... Start of SRAM
> >   * 0xFFFF_xxxx ...... Top of stack (grows down)
> >   * 0xFFFF_yyyy ...... Malloc area
> >   * 0xFFFF_zzzz ...... Global Data
> >   * 0xFFFF_FF00 ...... End of SRAM
> > + *
> > + * SRAM Memory layout for Arria 10:
> > + * 0xFFE0_0000 ...... Start of SRAM (bottom)
> > + * 0xFFEx_xxxx ...... Top of stack (grows down to bottom)
> > + * 0xFFEy_yyyy ...... Malloc area (grows up to top)
> > + * 0xFFEz_zzzz ...... Global Data
> > + * 0xFFE3_FFFF ...... End of SRAM (top)
> >   */
> >  #define CONFIG_SPL_FRAMEWORK
> >  #define CONFIG_SPL_TEXT_BASE		CONFIG_SYS_INIT_RAM_AD
> > DR
> >  #define CONFIG_SPL_MAX_SIZE		CONFIG_SYS_INIT_RAM_SIZ
> > E
> > +#if defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
> > +/* SPL memory allocation configuration, it is required by FAT
> > feature */
> > +#ifndef CONFIG_SYS_SPL_MALLOC_START
> > +#define CONFIG_SYS_SPL_MALLOC_SIZE	0x00002000
> > +#define CONFIG_SYS_SPL_MALLOC_START	(CONFIG_SYS_INIT_RAM_SI
> > ZE - \
> > +					 GENERATED_GBL_DATA_SIZE -
> > \
> > +					 CONFIG_SYS_SPL_MALLOC_SIZ
> > E + \
> > +					 CONFIG_SYS_INIT_RAM_ADDR)
> > +#endif
> > +#endif
> >  
> >  /* SPL SDMMC boot support */
> >  #ifdef CONFIG_SPL_MMC_SUPPORT
> > @@ -320,7 +337,11 @@ unsigned int
> > cm_get_qspi_controller_clk_hz(void);
> >  /*
> >   * Stack setup
> >   */
> > +#if defined(CONFIG_TARGET_SOCFPGA_GEN5)
> >  #define CONFIG_SPL_STACK		CONFIG_SYS_INIT_SP_ADDR
> > +#elif defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
> > +#define CONFIG_SPL_STACK		(CONFIG_SYS_SPL_MALLOC_STA
> > RT - 1)
> > +#endif
> >  
> >  /* Extra Environment */
> >  #ifndef CONFIG_SPL_BUILD
> > 
>