108 lines
2.2 KiB
C++
108 lines
2.2 KiB
C++
/*
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* \brief TLB driver for core
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* \author Martin Stein
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* \date 2012-02-22
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*/
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/*
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* Copyright (C) 2012-2013 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__ARM_V6_H_
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#define _TLB__ARM_V6_H_
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/* core includes */
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#include <tlb/arm.h>
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namespace Arm_v6
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{
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using namespace Genode;
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/**
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* First level translation table
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*/
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class Section_table;
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}
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class Arm_v6::Section_table : public Arm::Section_table
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{
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private:
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typedef Arm::Section_table Base;
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public:
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/**
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* Link to second level translation-table
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*/
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struct Page_table_descriptor : Base::Page_table_descriptor
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{
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/**
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* Compose descriptor value
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*/
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static access_t create(Arm::Page_table * const pt, Section_table *)
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{
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return Base::Page_table_descriptor::create(pt);
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}
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};
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/**
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* Section translation descriptor
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*/
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struct Section : Base::Section
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{
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/**
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* Compose descriptor value
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*/
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static access_t create(Page_flags const & flags,
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addr_t const pa, Section_table *)
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{
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return Base::Section::create(flags, pa);
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}
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};
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/**
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* Insert one atomic translation into this table
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*
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* For details see 'Base::insert_translation'
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*/
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size_t insert_translation(addr_t const vo, addr_t const pa,
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size_t const size_l2,
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Page_flags const & f,
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void * const p = 0)
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{
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return Base::insert_translation(vo, pa, size_l2, f, this, p);
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}
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/**
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* Insert translations for given area, do not permit displacement
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*
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* \param vo virtual offset within this table
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* \param s area size
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* \param io_mem wether the area maps MMIO
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*/
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void map_core_area(addr_t vo, size_t s, bool const io_mem)
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{
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Base::map_core_area(vo, s, io_mem, this);
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}
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};
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template <typename T>
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static typename T::access_t
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Arm::memory_region_attr(Page_flags const & flags)
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{
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typedef typename T::Tex Tex;
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typedef typename T::C C;
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typedef typename T::B B;
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if(flags.device) { return 0; }
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if(flags.cacheable) { return Tex::bits(5) | B::bits(1); }
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return Tex::bits(6) | C::bits(1);
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}
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#endif /* _TLB__ARM_V6_H_ */
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