53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
/*
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* \brief CPU driver for core
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* \author Martin stein
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* \date 2011-11-03
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*/
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/*
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* Copyright (C) 2011-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _CORE__SPEC__ARM_V7__CPU_SUPPORT_H_
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#define _CORE__SPEC__ARM_V7__CPU_SUPPORT_H_
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/* core includes */
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#include <spec/arm/cpu_support.h>
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namespace Genode { struct Arm_v7_cpu; }
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struct Genode::Arm_v7_cpu : Arm_cpu
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{
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/**
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* Returns whether this cpu implements the multiprocessor extensions
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*/
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static bool multi_processor()
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{
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static bool mp = Mpidr::Me::get(Mpidr::read());
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return mp;
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}
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/**
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* Invalidate TLB for given address space id
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*/
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static void invalidate_tlb(unsigned asid)
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{
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if (multi_processor()) {
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if (asid) Tlbiasidis::write(asid);
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else Tlbiallis::write(0);
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} else Arm_cpu::invalidate_tlb(asid);
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}
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static inline void synchronization_barrier()
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{
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asm volatile("dsb sy\n"
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"isb sy\n" ::: "memory");
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}
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};
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#endif /* _CORE__SPEC__ARM_V7__CPU_SUPPORT_H_ */
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