131 lines
2.8 KiB
C++
131 lines
2.8 KiB
C++
/*
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* \brief Protection-domain facility
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* \author Norman Feske
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* \date 2015-05-01
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*/
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/*
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* Copyright (C) 2015-2017 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__INCLUDE__PLATFORM_PD_H_
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#define _CORE__INCLUDE__PLATFORM_PD_H_
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/* Genode includes */
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#include <base/allocator.h>
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/* core includes */
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#include <platform_thread.h>
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#include <address_space.h>
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#include <vm_space.h>
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/* base-internal includes */
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#include <base/internal/capability_space_sel4.h>
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namespace Genode { class Platform_pd; }
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class Genode::Platform_pd : public Address_space
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{
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private:
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unsigned const _id; /* used as index in top-level CNode */
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Page_table_registry _page_table_registry;
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Cap_sel const _page_directory_sel;
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addr_t const _page_directory;
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Vm_space _vm_space;
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Cnode _cspace_cnode_1st;
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Constructible<Cnode> _cspace_cnode_2nd[1UL << CSPACE_SIZE_LOG2_1ST];
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Native_capability _parent { };
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/*
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* Allocator for core-managed selectors within the PD's CSpace
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*/
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typedef Bit_allocator<1 << NUM_CORE_MANAGED_SEL_LOG2> Sel_bit_alloc;
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struct Sel_alloc : Sel_bit_alloc
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{
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Sel_alloc() { _reserve(0, INITIAL_SEL_END); }
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};
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Sel_alloc _sel_alloc { };
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Lock _sel_alloc_lock { };
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Cap_sel alloc_sel();
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void free_sel(Cap_sel sel);
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addr_t _init_page_directory() const;
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void _deinit_page_directory(addr_t) const;
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public:
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/**
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* Constructors
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*/
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Platform_pd(Allocator &md_alloc, char const *);
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/**
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* Destructor
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*/
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~Platform_pd();
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/**
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* Bind thread to protection domain
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*/
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bool bind_thread(Platform_thread &);
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/**
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* Unbind thread from protection domain
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*
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* Free the thread's slot and update thread object.
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*/
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void unbind_thread(Platform_thread &);
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/**
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* Assign parent interface to protection domain
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*/
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void assign_parent(Native_capability parent);
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/*****************************
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** Address-space interface **
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*****************************/
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void flush(addr_t, size_t, Core_local_addr) override;
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/*****************************
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** seL4-specific interface **
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*****************************/
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Cnode &cspace_cnode(Cap_sel sel)
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{
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const unsigned index = sel.value() / (1 << CSPACE_SIZE_LOG2_2ND);
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ASSERT(index < sizeof(_cspace_cnode_2nd) /
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sizeof(_cspace_cnode_2nd[0]));
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return *_cspace_cnode_2nd[index];
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}
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Cnode &cspace_cnode_1st() { return _cspace_cnode_1st; }
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Cap_sel page_directory_sel() const { return _page_directory_sel; }
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size_t cspace_size_log2() { return CSPACE_SIZE_LOG2; }
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bool install_mapping(Mapping const &mapping, const char * thread_name);
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static Bit_allocator<1024> &pd_id_alloc();
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};
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#endif /* _CORE__INCLUDE__PLATFORM_PD_H_ */
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