21de42c45d
The new core-internal 'Address_space' interface enables cores RM service to flush mappings of a PD in which a given 'Rm_client' thread resides. Prior this patch, each platform invented their own way to flush mappings in the respective 'rm_session_support.cc' implementation. However, those implementations used to deal poorly with some corner cases. In particular, if a PD session was destroyed prior a RM session, the RM session would try to use no longer existing PD session. The new 'Address_space' uses the just added weak-pointer mechanism to deal with this issue. Furthermore, the generic 'Rm_session_component::detach' function has been improved to avoid duplicated unmap operations for platforms that implement the 'Address_space' interface. Therefore, it is related to issue #595. Right now, this is OKL4 only, but other platforms will follow.
82 lines
1.7 KiB
C++
82 lines
1.7 KiB
C++
/*
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* \brief Protection-domain facility
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* \author Norman Feske
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* \date 2009-10-02
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*/
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/*
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* Copyright (C) 2009-2013 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 _CORE__INCLUDE__PLATFORM_PD_H_
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#define _CORE__INCLUDE__PLATFORM_PD_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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/* Codezero includes */
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#include <codezero/syscalls.h>
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namespace Genode {
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class Platform_thread;
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class Platform_pd : public Address_space
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{
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private:
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enum { MAX_THREADS_PER_PD = 32 };
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enum { UTCB_VIRT_BASE = 0x30000000 };
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enum { UTCB_AREA_SIZE = MAX_THREADS_PER_PD*sizeof(struct Codezero::utcb) };
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unsigned _space_id;
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bool utcb_in_use[MAX_THREADS_PER_PD];
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public:
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/**
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* Constructors
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*/
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Platform_pd(bool core);
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Platform_pd(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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}
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#endif /* _CORE__INCLUDE__PLATFORM_PD_H_ */
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