2019-08-04 17:38:32 +01:00
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/*
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* Copyright (c) 2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// From Arm TF
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/*
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* Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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2020-01-02 18:41:52 +00:00
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.global spinlockLock
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2019-08-04 17:38:32 +01:00
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.type spinlockLock, %function
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2020-01-02 18:41:52 +00:00
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.func spinlockLock
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.cfi_startproc
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2019-08-04 17:38:32 +01:00
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spinlockLock:
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mov w2, #1
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sevl
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l1:
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wfe
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l2:
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ldaxr w1, [x0]
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cbnz w1, l1
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stxr w1, w2, [x0]
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cbnz w1, l2
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ret
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2020-01-02 18:41:52 +00:00
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.endfunc
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.cfi_endproc
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2019-08-04 17:38:32 +01:00
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.global spinlockUnlock
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.type spinlockUnlock, %function
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2020-01-02 18:41:52 +00:00
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.func spinlockUnlock
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.cfi_startproc
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2019-08-04 17:38:32 +01:00
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spinlockUnlock:
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stlr wzr, [x0]
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sev
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ret
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2020-01-02 18:41:52 +00:00
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.endfunc
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.cfi_endproc
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