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/*
* Copyright (c) 2013-2014, 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.
*/
#ifndef __CM_H__
#define __CM_H__
#include <cpu_data.h>
#include <stdint.h>
/*******************************************************************************
* Forward declarations
******************************************************************************/
struct entry_point_info;
/*******************************************************************************
* Function & variable prototypes
******************************************************************************/
void cm_init(void);
void *cm_get_context_by_mpidr(uint64_t mpidr, uint32_t security_state);
static inline void *cm_get_context(uint32_t security_state);
void cm_set_context_by_mpidr(uint64_t mpidr,
void *context,
uint32_t security_state);
static inline void cm_set_context(void *context, uint32_t security_state);
void cm_el3_sysregs_context_save(uint32_t security_state);
void cm_init_context(uint64_t mpidr, const struct entry_point_info *ep);
void cm_prepare_el3_exit(uint32_t security_state);
void cm_el3_sysregs_context_restore(uint32_t security_state);
void cm_el1_sysregs_context_save(uint32_t security_state);
void cm_el1_sysregs_context_restore(uint32_t security_state);
void cm_set_elr_el3(uint32_t security_state, uint64_t entrypoint);
void cm_set_elr_spsr_el3(uint32_t security_state,
uint64_t entrypoint, uint32_t spsr);
void cm_write_scr_el3_bit(uint32_t security_state,
uint32_t bit_pos,
uint32_t value);
void cm_set_next_eret_context(uint32_t security_state);
uint32_t cm_get_scr_el3(uint32_t security_state);
/* Inline definitions */
/*******************************************************************************
* 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);
}
#endif /* __CM_H__ */