122 lines
2.5 KiB
C++
122 lines
2.5 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 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 _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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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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unsigned const _vm_pad_cnode_sel;
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unsigned const _vm_cnode_sel;
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unsigned const _page_directory_sel;
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Untyped_address _init_page_directory();
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Untyped_address const _page_directory = _init_page_directory();
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Vm_space _vm_space;
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unsigned const _cspace_cnode_sel;
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Cnode _cspace_cnode;
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enum { CSPACE_SIZE_LOG2 = 12 };
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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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enum { NUM_CORE_MANAGED_SELECTORS_LOG2 = 10 };
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struct Sel_alloc : Bit_allocator<1 << NUM_CORE_MANAGED_SELECTORS_LOG2> { };
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Sel_alloc _sel_alloc;
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Lock _sel_alloc_lock;
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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, size_t ram_quota,
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char const *, signed pd_id = -1, bool create = true);
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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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* \return 0 on success or
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* -1 if thread ID allocation failed.
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*/
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int bind_thread(Platform_thread *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 *thread);
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/**
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* Assign parent interface to protection domain
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*/
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int assign_parent(Native_capability parent) { return 0; }
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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) { PDBG("not implemented"); }
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/*****************************
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** seL4-specific interface **
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*****************************/
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unsigned alloc_sel();
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void free_sel(unsigned sel);
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Cnode &cspace_cnode() { return _cspace_cnode; }
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unsigned 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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void install_mapping(Mapping const &mapping);
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};
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#endif /* _CORE__INCLUDE__PLATFORM_PD_H_ */
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