From e5c00a5d2c71cc7689e783f26a6031997857d661 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ky=C3=B6sti=20M=C3=A4lkki?= Date: Mon, 27 Jun 2016 14:50:27 +0300 Subject: intel post-car: Consolidate choose_top_of_stack() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: I2c49d68ea9a8f52737b6064bc4fa703bdb1af1df Signed-off-by: Kyösti Mälkki Reviewed-on: https://review.coreboot.org/15463 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/lib/romstage_stack.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 src/lib/romstage_stack.c (limited to 'src/lib/romstage_stack.c') diff --git a/src/lib/romstage_stack.c b/src/lib/romstage_stack.c new file mode 100644 index 0000000000..fde9d1b9b2 --- /dev/null +++ b/src/lib/romstage_stack.c @@ -0,0 +1,48 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * Copyright (C) 2015-2016 Intel Corp. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include + +/* + * Romstage needs quite a bit of stack for decompressing images since the lzma + * lib keeps its state on the stack during romstage. + */ +#define ROMSTAGE_RAM_STACK_SIZE 0x5000 + +uintptr_t romstage_ram_stack_base(size_t size, int src) +{ + /* cbmem_add() does a find() before add(). */ + if (src == ROMSTAGE_STACK_CBMEM) + return (uintptr_t)cbmem_add(CBMEM_ID_ROMSTAGE_RAM_STACK, size); + if (src == ROMSTAGE_STACK_LOW_MEM) + return CONFIG_RAMTOP - size; + return 0; +} + +uintptr_t romstage_ram_stack_bottom(void) +{ + return romstage_ram_stack_base(ROMSTAGE_RAM_STACK_SIZE, + ROMSTAGE_STACK_CBMEM); +} + +uintptr_t romstage_ram_stack_top(void) +{ + uintptr_t stack_top = romstage_ram_stack_base(ROMSTAGE_RAM_STACK_SIZE, + ROMSTAGE_STACK_CBMEM); + stack_top += ROMSTAGE_RAM_STACK_SIZE; + return stack_top; +} -- cgit v1.2.3