From 40a3e321d4e8f2877de1700db67b8c7f7ea89820 Mon Sep 17 00:00:00 2001 From: Patrick Georgi Date: Mon, 22 Jun 2015 19:41:29 +0200 Subject: nvidia/tegra210: add new SoC This includes Chrome OS downstream up to Change-Id: Ic89ed54c. Change-Id: I81853434600390d643160fe57554495b2bfe60ab Signed-off-by: Patrick Georgi Reviewed-on: http://review.coreboot.org/10633 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/soc/nvidia/tegra210/stack.S | 45 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 src/soc/nvidia/tegra210/stack.S (limited to 'src/soc/nvidia/tegra210/stack.S') diff --git a/src/soc/nvidia/tegra210/stack.S b/src/soc/nvidia/tegra210/stack.S new file mode 100644 index 0000000000..5a48d0e46c --- /dev/null +++ b/src/soc/nvidia/tegra210/stack.S @@ -0,0 +1,45 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2014 Google Inc. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc. + */ + +/* Macro to initialize stack, perform seeding if required and finally call the + * function provided + * @stack_top : First address above the stack + * @stack_bottom : Lowest address on the stack + * @seed : Stack seeding required (1=yes/otherwise=no) + * @func : Function to call after initializing stack + */ +.macro stack_init stack_top, stack_bottom, seed, func + /* Check if stack seeding is required */ + mov r0, #\seed + cmp r0, #1 + bne call_func + /* Stack seeding */ + ldr r0, =\stack_bottom + ldr r1, =\stack_top + ldr r2, =0xdeadbeef +init_stack_loop: + str r2, [r0] + add r0, #4 + cmp r0, r1 + bne init_stack_loop + +call_func: + ldr sp, =\stack_top /* Set up stack pointer */ + bl \func +.endm -- cgit v1.2.3