bl31/bl31_context_mgmt.c

   1 /*
   2  * Copyright (c) 2013-2018, 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 }