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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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42
arch/arm/lib/stack.c Normal file
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@@ -0,0 +1,42 @@
/*
* Copyright (c) 2015 Andreas Bießmann <andreas.devel@googlemail.com>
*
* Copyright (c) 2011 The Chromium OS Authors.
* (C) Copyright 2002-2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
DECLARE_GLOBAL_DATA_PTR;
int arch_reserve_stacks(void)
{
#ifdef CONFIG_SPL_BUILD
gd->start_addr_sp -= 128; /* leave 32 words for abort-stack */
gd->irq_sp = gd->start_addr_sp;
#else
/* setup stack pointer for exceptions */
gd->irq_sp = gd->start_addr_sp;
# if !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;
# endif
#endif
return 0;
}