blob: 0842825cb78d675e8ca92b013fe0f46527d6bf01 [file] [log] [blame]
Andrew Thoelke8c28fe02014-06-02 11:40:35 +01001/*
Soby Mathew3700a922015-07-13 11:21:11 +01002 * Copyright (c) 2014-2015, ARM Limited and Contributors. All rights reserved.
Andrew Thoelke8c28fe02014-06-02 11:40:35 +01003 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * Redistributions of source code must retain the above copyright notice, this
8 * list of conditions and the following disclaimer.
9 *
10 * Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * Neither the name of ARM nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific
16 * prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <asm_macros.S>
32#include <cpu_data.h>
33
34.globl init_cpu_data_ptr
Andrew Thoelke8c28fe02014-06-02 11:40:35 +010035.globl _cpu_data_by_index
36
37/* -----------------------------------------------------------------
38 * void init_cpu_data_ptr(void)
39 *
40 * Initialise the TPIDR_EL3 register to refer to the cpu_data_t
41 * for the calling CPU. This must be called before cm_get_cpu_data()
42 *
Soby Mathew3700a922015-07-13 11:21:11 +010043 * This can be called without a valid stack. It assumes that
44 * plat_my_core_pos() does not clobber register x10.
45 * clobbers: x0, x1, x10
Andrew Thoelke8c28fe02014-06-02 11:40:35 +010046 * -----------------------------------------------------------------
47 */
48func init_cpu_data_ptr
49 mov x10, x30
Soby Mathew3700a922015-07-13 11:21:11 +010050 bl plat_my_core_pos
51 bl _cpu_data_by_index
Andrew Thoelke8c28fe02014-06-02 11:40:35 +010052 msr tpidr_el3, x0
53 ret x10
Kévin Petita877c252015-03-24 14:03:57 +000054endfunc init_cpu_data_ptr
Andrew Thoelke8c28fe02014-06-02 11:40:35 +010055
Andrew Thoelke8c28fe02014-06-02 11:40:35 +010056/* -----------------------------------------------------------------
57 * cpu_data_t *_cpu_data_by_index(uint32_t cpu_index)
58 *
59 * Return the cpu_data structure for the CPU with given linear index
60 *
61 * This can be called without a valid stack.
62 * clobbers: x0, x1
63 * -----------------------------------------------------------------
64 */
65func _cpu_data_by_index
66 adr x1, percpu_data
67 add x0, x1, x0, LSL #CPU_DATA_LOG2SIZE
68 ret
Kévin Petita877c252015-03-24 14:03:57 +000069endfunc _cpu_data_by_index