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 ******************************************************************************/ 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 ******************************************************************************/ 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 ******************************************************************************/ 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 ******************************************************************************/ 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 ******************************************************************************/ 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 ******************************************************************************/ 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 ******************************************************************************/ 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
