[U-Boot] [PATCH v5 12/23] Add spl load feature

[Scott Wood]

On 02/12/2013 04:23:21 PM, Simon Glass wrote:
> +Albert
> 
> Hi Scott,
> 
> On Tue, Feb 12, 2013 at 12:29 PM, Scott Wood  
> <scottwood at freescale.com> wrote:
> > On 02/08/2013 09:12:08 AM, Simon Glass wrote:
> >>
> >> This adds secondary program loader support to the generic board.
> >>
> >> Signed-off-by: Simon Glass <sjg at chromium.org>
> >> ---
> >> Changes in v5: None
> >> Changes in v4: None
> >> Changes in v3: None
> >> Changes in v2: None
> >>
> >>  common/board_f.c | 20 ++++++++++++++++++++
> >>  1 file changed, 20 insertions(+)
> >>
> >> diff --git a/common/board_f.c b/common/board_f.c
> >> index aa10f4b..3a8036f 100644
> >> --- a/common/board_f.c
> >> +++ b/common/board_f.c
> >> @@ -309,6 +309,7 @@ static int reserve_uboot(void)
> >>         return 0;
> >>  }
> >>
> >> +#ifndef CONFIG_SPL_BUILD
> >>  /* reserve memory for malloc() area */
> >>  static int reserve_malloc(void)
> >>  {
> >> @@ -328,6 +329,7 @@ static int reserve_board(void)
> >>                         sizeof(bd_t), gd->dest_addr_sp);
> >>         return 0;
> >>  }
> >> +#endif
> >>
> >>  static int setup_machine(void)
> >>  {
> >> @@ -365,6 +367,7 @@ static int reserve_fdt(void)
> >>         return 0;
> >>  }
> >>
> >> +#ifndef CONFIG_SPL_BUILD
> >>  static int reserve_stacks(void)
> >>  {
> >>         /* setup stack pointer for exceptions */
> >> @@ -384,6 +387,17 @@ static int reserve_stacks(void)
> >>
> >>         return 0;
> >>  }
> >> +#endif
> >> +
> >> +#ifdef CONFIG_SPL_BUILD
> >> +static int reserve_stacks_spl(void)
> >> +{
> >> +       /* Why not -= ? */
> >> +       gd->dest_addr_sp += 128;        /* leave 32 words for  
> abort-stack
> >> */
> >> +       gd->irq_sp = gd->dest_addr_sp;
> >> +       return 0;
> >> +}
> >> +#endif
> >
> >
> > "abort-stack" doesn't sound very generic, and that "why not"  
> question should
> > probably be answered.
> 
> I'm not sure what you mean by the first comment.

It's ARM-specific terminology ("exception" is more typical than "abort"  
elsewhere).  Why 32 words, BTW?  Why is it larger in SPL versus non-SPL?

-Scott