56 lines
1.2 KiB
C++
56 lines
1.2 KiB
C++
/*
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* \brief Generic page flags
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* \author Stefan Kalkowski
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* \date 2014-02-24
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*/
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/*
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* Copyright (C) 2014 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 General Public License version 2.
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*/
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#ifndef _TLB__PAGE_FLAGS_H_
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#define _TLB__PAGE_FLAGS_H_
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namespace Genode
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{
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/**
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* Map app-specific mem attributes to a TLB-specific POD
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*/
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struct Page_flags
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{
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bool writeable;
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bool executable;
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bool privileged;
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bool global;
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bool device;
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bool cacheable;
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/**
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* Create flag POD for Genode pagers
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*/
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static const Page_flags
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apply_mapping(bool const writeable,
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bool const write_combined,
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bool const io_mem) {
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return Page_flags { writeable, true, false, false,
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io_mem, !write_combined && !io_mem }; }
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/**
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* Create flag POD for kernel when it creates the core space
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*/
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static const Page_flags map_core_area(bool const io_mem) {
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return Page_flags { true, true, false, false, io_mem, !io_mem }; }
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/**
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* Create flag POD for the mode transition region
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*/
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static const Page_flags mode_transition() {
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return Page_flags { true, true, true, true, false, true }; }
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};
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}
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#endif /* _TLB__PAGE_FLAGS_H_ */
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