82 lines
2.3 KiB
ArmAsm
82 lines
2.3 KiB
ArmAsm
/*
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* Copyright (c) 2016, 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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#include <asm_macros.S>
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.macro push ra, rb, sp=sp
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stp \ra, \rb, [\sp,#-16]!
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.endm
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.macro pop ra, rb, sp=sp
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ldp \ra, \rb, [\sp], #16
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.endm
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.global trusty_context_switch_helper
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func trusty_context_switch_helper
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push x8, xzr
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push x19, x20
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push x21, x22
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push x23, x24
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push x25, x26
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push x27, x28
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push x29, x30
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mov x9, sp
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ldr x10, [x0]
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mov sp, x10
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str x9, [x0]
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pop x29, x30
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pop x27, x28
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pop x25, x26
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pop x23, x24
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pop x21, x22
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pop x19, x20
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pop x8, xzr
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stp x1, x2, [x8]
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stp x3, x4, [x8, #16]
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ret
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endfunc trusty_context_switch_helper
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.global trusty_init_context_stack
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func trusty_init_context_stack
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push x8, xzr, x1
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push xzr, xzr, x1
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push xzr, xzr, x1
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push xzr, xzr, x1
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push xzr, xzr, x1
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push xzr, xzr, x1
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adr x9, el3_exit
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push xzr, x9, x1
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str x1, [x0]
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ret
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endfunc trusty_init_context_stack
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