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bbf8f6f95b
The upcoming Firmware Update feature needs transitioning across Secure/Normal worlds to complete the FWU process and hence requires context management code to perform this task. Currently context management code is part of BL31 stage only. This patch moves the code from (include)/bl31 to (include)/common. Some function declarations/definitions and macros have also moved to different files to help code sharing. Change-Id: I3858b08aecdb76d390765ab2b099f457873f7b0c
104 lines
4.1 KiB
C
104 lines
4.1 KiB
C
/*
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* Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __CM_H__
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#define __CM_H__
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#include <arch.h>
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#include <bl_common.h>
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#include <common_def.h>
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/*******************************************************************************
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* Forward declarations
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******************************************************************************/
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struct entry_point_info;
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/*******************************************************************************
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* Function & variable prototypes
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******************************************************************************/
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void cm_init(void);
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void *cm_get_context_by_mpidr(uint64_t mpidr,
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uint32_t security_state) __warn_deprecated;
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void cm_set_context_by_mpidr(uint64_t mpidr,
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void *context,
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uint32_t security_state) __warn_deprecated;
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void *cm_get_context_by_index(unsigned int cpu_idx,
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unsigned int security_state);
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void cm_set_context_by_index(unsigned int cpu_idx,
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void *context,
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unsigned int security_state);
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void *cm_get_context(uint32_t security_state);
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void cm_set_context(void *context, uint32_t security_state);
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inline void cm_set_next_context(void *context);
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void cm_init_context(uint64_t mpidr,
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const struct entry_point_info *ep) __warn_deprecated;
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void cm_init_my_context(const struct entry_point_info *ep);
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void cm_init_context_by_index(unsigned int cpu_idx,
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const struct entry_point_info *ep);
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void cm_prepare_el3_exit(uint32_t security_state);
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void cm_el1_sysregs_context_save(uint32_t security_state);
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void cm_el1_sysregs_context_restore(uint32_t security_state);
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void cm_set_elr_el3(uint32_t security_state, uint64_t entrypoint);
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void cm_set_elr_spsr_el3(uint32_t security_state,
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uint64_t entrypoint, uint32_t spsr);
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void cm_write_scr_el3_bit(uint32_t security_state,
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uint32_t bit_pos,
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uint32_t value);
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void cm_set_next_eret_context(uint32_t security_state);
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uint32_t cm_get_scr_el3(uint32_t security_state);
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/* Inline definitions */
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/*******************************************************************************
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* This function is used to program the context that's used for exception
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* return. This initializes the SP_EL3 to a pointer to a 'cpu_context' set for
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* the required security state
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******************************************************************************/
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inline void cm_set_next_context(void *context)
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{
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#if DEBUG
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uint64_t sp_mode;
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/*
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* Check that this function is called with SP_EL0 as the stack
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* pointer
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*/
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__asm__ volatile("mrs %0, SPSel\n"
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: "=r" (sp_mode));
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assert(sp_mode == MODE_SP_EL0);
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#endif
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__asm__ volatile("msr spsel, #1\n"
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"mov sp, %0\n"
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"msr spsel, #0\n"
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: : "r" (context));
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}
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#endif /* __CM_H__ */
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