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Yatharth Kochar6c0566c2015-10-02 17:56:48 +01001/*
Roberto Vargas777dd432018-02-12 12:36:17 +00002 * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
Yatharth Kochar6c0566c2015-10-02 17:56:48 +01003 *
dp-armfa3cf0b2017-05-03 09:38:09 +01004 * SPDX-License-Identifier: BSD-3-Clause
Yatharth Kochar6c0566c2015-10-02 17:56:48 +01005 */
6
7#include <assert.h>
8#include <bl31.h>
Soby Mathew0d786072016-03-24 16:56:29 +00009#include <bl_common.h>
Yatharth Kochar6c0566c2015-10-02 17:56:48 +010010#include <context.h>
11#include <context_mgmt.h>
12#include <cpu_data.h>
13#include <platform.h>
14
15
16/*******************************************************************************
17 * This function returns a pointer to the most recent 'cpu_context' structure
18 * for the calling CPU that was set as the context for the specified security
19 * state. NULL is returned if no such structure has been specified.
20 ******************************************************************************/
21void *cm_get_context(uint32_t security_state)
22{
23 assert(security_state <= NON_SECURE);
24
25 return get_cpu_data(cpu_context[security_state]);
26}
27
28/*******************************************************************************
29 * This function sets the pointer to the current 'cpu_context' structure for the
30 * specified security state for the calling CPU
31 ******************************************************************************/
32void cm_set_context(void *context, uint32_t security_state)
33{
34 assert(security_state <= NON_SECURE);
35
36 set_cpu_data(cpu_context[security_state], context);
37}
38
39/*******************************************************************************
40 * This function returns a pointer to the most recent 'cpu_context' structure
41 * for the CPU identified by `cpu_idx` that was set as the context for the
42 * specified security state. NULL is returned if no such structure has been
43 * specified.
44 ******************************************************************************/
45void *cm_get_context_by_index(unsigned int cpu_idx,
46 unsigned int security_state)
47{
48 assert(sec_state_is_valid(security_state));
49
50 return get_cpu_data_by_index(cpu_idx, cpu_context[security_state]);
51}
52
53/*******************************************************************************
54 * This function sets the pointer to the current 'cpu_context' structure for the
55 * specified security state for the CPU identified by CPU index.
56 ******************************************************************************/
57void cm_set_context_by_index(unsigned int cpu_idx, void *context,
58 unsigned int security_state)
59{
60 assert(sec_state_is_valid(security_state));
61
62 set_cpu_data_by_index(cpu_idx, cpu_context[security_state], context);
63}
64
65#if !ERROR_DEPRECATED
66/*
67 * These context management helpers are deprecated but are maintained for use
68 * by SPDs which have not migrated to the new API. If ERROR_DEPRECATED
69 * is enabled, these are excluded from the build so as to force users to
70 * migrate to the new API.
71 */
72
73/*******************************************************************************
74 * This function returns a pointer to the most recent 'cpu_context' structure
75 * for the CPU identified by MPIDR that was set as the context for the specified
76 * security state. NULL is returned if no such structure has been specified.
77 ******************************************************************************/
78void *cm_get_context_by_mpidr(uint64_t mpidr, uint32_t security_state)
79{
80 assert(sec_state_is_valid(security_state));
81
82 return cm_get_context_by_index(platform_get_core_pos(mpidr), security_state);
83}
84
85/*******************************************************************************
86 * This function sets the pointer to the current 'cpu_context' structure for the
87 * specified security state for the CPU identified by MPIDR
88 ******************************************************************************/
89void cm_set_context_by_mpidr(uint64_t mpidr, void *context, uint32_t security_state)
90{
91 assert(sec_state_is_valid(security_state));
92
93 cm_set_context_by_index(platform_get_core_pos(mpidr),
94 context, security_state);
95}
96
97/*******************************************************************************
98 * The following function provides a compatibility function for SPDs using the
99 * existing cm library routines. This function is expected to be invoked for
100 * initializing the cpu_context for the CPU specified by MPIDR for first use.
101 ******************************************************************************/
Roberto Vargas777dd432018-02-12 12:36:17 +0000102void cm_init_context(uint64_t mpidr, const entry_point_info_t *ep)
Yatharth Kochar6c0566c2015-10-02 17:56:48 +0100103{
104 if ((mpidr & MPIDR_AFFINITY_MASK) ==
105 (read_mpidr_el1() & MPIDR_AFFINITY_MASK))
106 cm_init_my_context(ep);
107 else
108 cm_init_context_by_index(platform_get_core_pos(mpidr), ep);
109}
Soby Mathew0d786072016-03-24 16:56:29 +0000110#endif