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54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
#pragma once
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/*
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* This file is part of open_agb_firm
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* Copyright (C) 2021 derrek, profi200
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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 3 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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* 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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#include "types.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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static inline void spinlockLock(u32 *lock)
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{
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u32 tmp;
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__asm__ volatile("1: ldrex %0, [%1]\n"
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" teq %0, #0\n"
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" wfene\n"
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" strexeq %0, %2, [%1]\n"
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" teqeq %0, #0\n"
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" bne 1b\n"
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" mcr p15, 0, %0, c7, c10, 5" // DMB
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: "=&r" (tmp) : "r" (lock), "r" (1) : "cc", "memory");
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}
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static inline void spinlockUnlock(u32 *lock)
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{
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__asm__ volatile("mcr p15, 0, %0, c7, c10, 5\n" // DMB
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"str %0, [%1]\n"
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"mcr p15, 0, %0, c7, c10, 4\n" // DSB
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"sev"
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: : "r" (0), "r" (lock) : "memory");
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}
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#ifdef __cplusplus
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} // extern "C"
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#endif |