blob: ebbf509b4b7b7b3c00bf8da237cd7f14a4e96316 [file] [log] [blame]
Andrew Thoelke65668f92014-03-20 10:48:23 +00001/*
2 * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
3 *
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 <arch.h>
Andrew Thoelke65668f92014-03-20 10:48:23 +000032#include <asm_macros.S>
Dan Handley2bd4ef22014-04-09 13:14:54 +010033#include <platform.h>
Andrew Thoelke65668f92014-03-20 10:48:23 +000034
35
36 .local pcpu_dv_mem_stack
37 .local platform_normal_stacks
38 .weak platform_set_stack
39 .weak platform_get_stack
40 .weak platform_set_coherent_stack
41
42
43 /* -----------------------------------------------------
44 * void platform_set_coherent_stack (unsigned long mpidr)
45 *
46 * For a given CPU, this function sets the stack pointer
47 * to a stack allocated in device memory. This stack can
48 * be used by C code which enables/disables the SCTLR.M
49 * SCTLR.C bit e.g. while powering down a cpu
50 * -----------------------------------------------------
51 */
52func platform_set_coherent_stack
53 mov x5, x30 // lr
54 get_mp_stack pcpu_dv_mem_stack, PCPU_DV_MEM_STACK_SIZE
55 mov sp, x0
56 ret x5
57
58 /* -----------------------------------------------------
59 * unsigned long platform_get_stack (unsigned long mpidr)
60 *
61 * For a given CPU, this function returns the stack
62 * pointer for a stack allocated in device memory.
63 * -----------------------------------------------------
64 */
65func platform_get_stack
66 mov x10, x30 // lr
67 get_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE
68 ret x10
69
70 /* -----------------------------------------------------
71 * void platform_set_stack (unsigned long mpidr)
72 *
73 * For a given CPU, this function sets the stack pointer
74 * to a stack allocated in normal memory.
75 * -----------------------------------------------------
76 */
77func platform_set_stack
78 mov x9, x30 // lr
79 bl platform_get_stack
80 mov sp, x0
81 ret x9
82
83 /* -----------------------------------------------------
84 * Per-cpu stacks in normal memory.
85 * Used for C code during runtime execution (when coherent
86 * stacks are not required).
87 * Each cpu gets a stack of PLATFORM_STACK_SIZE bytes.
88 * -----------------------------------------------------
89 */
90declare_stack platform_normal_stacks, tzfw_normal_stacks, \
91 PLATFORM_STACK_SIZE, PLATFORM_CORE_COUNT
92
93 /* -----------------------------------------------------
94 * Per-cpu stacks in device memory.
95 * Used for C code just before power down or right after
96 * power up when the MMU or caches need to be turned on
97 * or off.
98 * Each cpu gets a stack of PCPU_DV_MEM_STACK_SIZE bytes.
99 * -----------------------------------------------------
100 */
101declare_stack pcpu_dv_mem_stack, tzfw_coherent_mem, \
102 PCPU_DV_MEM_STACK_SIZE, PLATFORM_CORE_COUNT