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common/board_f: factor out reserve_stacks

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Introduce arch_reserve_stacks() to tailor gd->start_addr_sp and gd->irq_sp to
the architecture needs.

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Andreas Bießmann
2015-02-06 23:06:45 +01:00
parent 4db896236c
commit 68145d4c7b
6 changed files with 102 additions and 35 deletions
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44
common/board_f.c
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@@ -573,48 +573,22 @@ static int reserve_fdt(void)
return 0;
}
int arch_reserve_stacks(void)
{
return 0;
}
static int reserve_stacks(void)
{
#ifdef CONFIG_SPL_BUILD
# ifdef CONFIG_ARM
gd->start_addr_sp -= 128; /* leave 32 words for abort-stack */
gd->irq_sp = gd->start_addr_sp;
# endif
#else
# ifdef CONFIG_PPC
ulong *s;
# endif
/* setup stack pointer for exceptions */
/* make stack pointer 16-byte aligned */
gd->start_addr_sp -= 16;
gd->start_addr_sp &= ~0xf;
gd->irq_sp = gd->start_addr_sp;
/*
* Handle architecture-specific things here
* TODO(sjg@chromium.org): Perhaps create arch_reserve_stack()
* to handle this and put in arch/xxx/lib/stack.c
* let the architecture specific code tailor gd->start_addr_sp and
* gd->irq_sp
*/
# if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
# ifdef CONFIG_USE_IRQ
gd->start_addr_sp -= (CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ);
debug("Reserving %zu Bytes for IRQ stack at: %08lx\n",
CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ, gd->start_addr_sp);
/* 8-byte alignment for ARM ABI compliance */
gd->start_addr_sp &= ~0x07;
# endif
/* leave 3 words for abort-stack, plus 1 for alignment */
gd->start_addr_sp -= 16;
# elif defined(CONFIG_PPC)
/* Clear initial stack frame */
s = (ulong *) gd->start_addr_sp;
*s = 0; /* Terminate back chain */
*++s = 0; /* NULL return address */
# endif /* Architecture specific code */
return 0;
#endif
return arch_reserve_stacks();
}
static int display_new_sp(void)