diff options
| author | Andreas Bießmann <andreas.devel@googlemail.com> | 2015-02-06 23:06:45 +0100 |
|---|---|---|
| committer | Andreas Bießmann <andreas.devel@googlemail.com> | 2015-02-17 22:52:42 +0100 |
| commit | 68145d4c7b3aa83d74c2dc904a39fab17cee1691 (patch) | |
| tree | a4b3b7204d322654ecd5afe9cc05a5f043adfa9f /arch/arm/lib/stack.c | |
| parent | 4db896236cdac37db17b215ba3ff2d2701bddb49 (diff) | |
common/board_f: factor out reserve_stacks
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>
Diffstat (limited to 'arch/arm/lib/stack.c')
| -rw-r--r-- | arch/arm/lib/stack.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/arm/lib/stack.c b/arch/arm/lib/stack.c new file mode 100644 index 0000000000..cf10a53ec6 --- /dev/null +++ b/arch/arm/lib/stack.c @@ -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; +} |