b49e588c1c
This patch replaces the former 'Pd_session::bind_thread' function by a PD-capability argument of the 'Cpu_session::create_thread' function, and removes the ancient thread-start protocol via 'Rm_session::add_client' and 'Cpu_session::set_pager'. Threads are now bound to PDs at their creation time and implicitly paged according to the address space of the PD. Note the API change: This patch changes the signature of the 'Child' and 'Process' constructors. There is a new 'address_space' argument, which represents the region map representing the child's address space. It is supplied separately to the PD session capability (which principally can be invoked to obtain the PD's address space) to allow the population of the address space without relying on an 'Pd_session::address_space' RPC call. Furthermore, a new (optional) env_pd argument allows the explicit overriding of the PD capability handed out to the child as part of its environment. It can be used to intercept the interaction of the child with its PD session at core. This is used by Noux. Issue #1938
118 lines
2.4 KiB
C++
118 lines
2.4 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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/* 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 _init_page_directory();
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addr_t const _page_directory = _init_page_directory();
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Vm_space _vm_space;
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Cap_sel const _cspace_cnode_sel;
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Cnode _cspace_cnode;
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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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struct Sel_alloc : Bit_allocator<1 << NUM_CORE_MANAGED_SEL_LOG2>
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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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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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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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bool 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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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);
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/*****************************
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** seL4-specific interface **
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*****************************/
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Cap_sel alloc_sel();
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void free_sel(Cap_sel sel);
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Cnode &cspace_cnode() { return _cspace_cnode; }
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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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void install_mapping(Mapping const &mapping);
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};
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#endif /* _CORE__INCLUDE__PLATFORM_PD_H_ */
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