1 /*
2 * Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <assert.h>
8 #include <bl31.h>
9 #include <bl_common.h>
10 #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 ******************************************************************************/
cm_get_context(uint32_t security_state)21 void *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 ******************************************************************************/
cm_set_context(void * context,uint32_t security_state)32 void 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 ******************************************************************************/
cm_get_context_by_index(unsigned int cpu_idx,unsigned int security_state)45 void *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 ******************************************************************************/
cm_set_context_by_index(unsigned int cpu_idx,void * context,unsigned int security_state)57 void 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 ******************************************************************************/
cm_get_context_by_mpidr(uint64_t mpidr,uint32_t security_state)78 void *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 ******************************************************************************/
cm_set_context_by_mpidr(uint64_t mpidr,void * context,uint32_t security_state)89 void 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 ******************************************************************************/
cm_init_context(unsigned long mpidr,const entry_point_info_t * ep)102 void cm_init_context(unsigned long mpidr, const entry_point_info_t *ep)
103 {
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 }
110 #endif
111