blob: fae1a37efcf68b5eb1e0474d788b336decb80f48 [file] [log] [blame]
Ronald G. Minnichd6b16f52013-08-16 15:57:56 -07001/*
2 * This file is part of the coreboot project.
3 *
4 * Copyright 2013 Google Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 */
30#include <stdlib.h>
31#include <arch/cpu.h>
32
Elyes HAOUAS777ea892016-07-29 07:40:41 +020033/* Return the CPU struct which is at the high memory address of the stack.
Ronald G. Minnichd6b16f52013-08-16 15:57:56 -070034 */
35struct cpu_info *cpu_info(void)
36{
Julius Werner635ee512014-09-23 20:53:20 -070037#error "This is BROKEN! ARM stacks are currently not guaranteed to be " \
Martin Roth46357872017-07-23 16:01:26 -060038 "STACK_SIZE-aligned in any way. If you ever plan to revive this " \
39 "feature, make sure you add the proper assertions " \
40 "(and maybe consider revising the whole thing to work closer to what " \
41 "arm64 is doing now)."
Ronald G. Minnichd6b16f52013-08-16 15:57:56 -070042 uintptr_t addr = ALIGN((uintptr_t)__builtin_frame_address(0),
43 CONFIG_STACK_SIZE);
44 addr -= sizeof(struct cpu_info);
45 return (void *)addr;
46}