blob: f8751c2ab0aa96f1e850fd2c4beaac64421ce36e [file] [log] [blame]
/*
* Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <assert.h>
#include <bl31.h>
#include <bl_common.h>
#include <context.h>
#include <context_mgmt.h>
#include <cpu_data.h>
#include <platform.h>
/*******************************************************************************
* This function returns a pointer to the most recent 'cpu_context' structure
* for the calling CPU that was set as the context for the specified security
* state. NULL is returned if no such structure has been specified.
******************************************************************************/
void *cm_get_context(uint32_t security_state)
{
assert(security_state <= NON_SECURE);
return get_cpu_data(cpu_context[security_state]);
}
/*******************************************************************************
* This function sets the pointer to the current 'cpu_context' structure for the
* specified security state for the calling CPU
******************************************************************************/
void cm_set_context(void *context, uint32_t security_state)
{
assert(security_state <= NON_SECURE);
set_cpu_data(cpu_context[security_state], context);
}
/*******************************************************************************
* This function returns a pointer to the most recent 'cpu_context' structure
* for the CPU identified by `cpu_idx` that was set as the context for the
* specified security state. NULL is returned if no such structure has been
* specified.
******************************************************************************/
void *cm_get_context_by_index(unsigned int cpu_idx,
unsigned int security_state)
{
assert(sec_state_is_valid(security_state));
return get_cpu_data_by_index(cpu_idx, cpu_context[security_state]);
}
/*******************************************************************************
* This function sets the pointer to the current 'cpu_context' structure for the
* specified security state for the CPU identified by CPU index.
******************************************************************************/
void cm_set_context_by_index(unsigned int cpu_idx, void *context,
unsigned int security_state)
{
assert(sec_state_is_valid(security_state));
set_cpu_data_by_index(cpu_idx, cpu_context[security_state], context);
}
#if !ERROR_DEPRECATED
/*
* These context management helpers are deprecated but are maintained for use
* by SPDs which have not migrated to the new API. If ERROR_DEPRECATED
* is enabled, these are excluded from the build so as to force users to
* migrate to the new API.
*/
/*******************************************************************************
* This function returns a pointer to the most recent 'cpu_context' structure
* for the CPU identified by MPIDR that was set as the context for the specified
* security state. NULL is returned if no such structure has been specified.
******************************************************************************/
void *cm_get_context_by_mpidr(uint64_t mpidr, uint32_t security_state)
{
assert(sec_state_is_valid(security_state));
return cm_get_context_by_index(platform_get_core_pos(mpidr), security_state);
}
/*******************************************************************************
* This function sets the pointer to the current 'cpu_context' structure for the
* specified security state for the CPU identified by MPIDR
******************************************************************************/
void cm_set_context_by_mpidr(uint64_t mpidr, void *context, uint32_t security_state)
{
assert(sec_state_is_valid(security_state));
cm_set_context_by_index(platform_get_core_pos(mpidr),
context, security_state);
}
/*******************************************************************************
* The following function provides a compatibility function for SPDs using the
* existing cm library routines. This function is expected to be invoked for
* initializing the cpu_context for the CPU specified by MPIDR for first use.
******************************************************************************/
void cm_init_context(unsigned long mpidr, const entry_point_info_t *ep)
{
if ((mpidr & MPIDR_AFFINITY_MASK) ==
(read_mpidr_el1() & MPIDR_AFFINITY_MASK))
cm_init_my_context(ep);
else
cm_init_context_by_index(platform_get_core_pos(mpidr), ep);
}
#endif