59 lines
1.4 KiB
ArmAsm
Executable File
59 lines
1.4 KiB
ArmAsm
Executable File
/* SPDX-License-Identifier: GPL-2.0
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* Copyright (c) 2014 Samsung Electronics Co., Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/linkage.h>
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/*
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* Each chip vendors have different logic of EL2.
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* So, we need to make different el2 calls.
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* Later, we may need another logic for other chip vendors like MTK.
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*/
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#ifdef CONFIG_ARCH_EXYNOS
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SYM_CODE_START(_uh_call)
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hvc #0
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ret
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SYM_CODE_END(_uh_call)
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#elif defined(CONFIG_ARCH_QCOM)
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SYM_CODE_START(uh_call)
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entry:
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stp x1, x0, [sp, #-16]!
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stp x3, x2, [sp, #-16]!
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stp x5, x4, [sp, #-16]!
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stp x7, x6, [sp, #-16]!
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back:
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smc #0x0
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/* save smc return result to x8 */
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mov x8, x0
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/* interrupted case does not need x0-x7 be restored */
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cmp x8, #0x1
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b.eq back
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ldp x7, x6, [sp], #16
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ldp x5, x4, [sp], #16
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ldp x3, x2, [sp], #16
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ldp x1, x0, [sp], #16
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cmp x8, #0x0
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/* busy return case does need x0-x7 be restored */
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b.ne entry
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ret
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SYM_CODE_END(uh_call)
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#endif
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