144 lines
3.1 KiB
C++
144 lines
3.1 KiB
C++
/*
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* \brief Platform specific part of a Genode protection domain
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* \author Martin Stein
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* \author Stefan Kalkowski
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* \date 2012-02-12
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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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/* Genode includes */
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#include <base/printf.h>
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#include <root/root.h>
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/* Core includes */
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#include <tlb.h>
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#include <platform.h>
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#include <platform_thread.h>
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#include <address_space.h>
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namespace Genode
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{
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/**
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* Regain all administrative memory that isn't used anymore by 'tlb'
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*/
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inline void regain_ram_from_tlb(Tlb * tlb)
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{
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size_t s;
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void * base;
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while (tlb->regain_memory(base, s)) {
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platform()->ram_alloc()->free(base, s);
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}
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}
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class Platform_thread;
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/**
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* Platform specific part of a Genode protection domain
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*/
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class Platform_pd : public Address_space
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{
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protected:
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unsigned _id;
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Native_capability _parent;
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Native_thread_id _main_thread;
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char const * const _label;
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Tlb * _tlb;
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public:
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/**
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* Constructor for core pd
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*/
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Platform_pd(Tlb * tlb)
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: _main_thread(0), _label("core"), _tlb(tlb) { }
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/**
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* Constructor
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*/
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Platform_pd(char const *label) : _main_thread(0), _label(label)
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{
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/* get some aligned space for the kernel object */
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void * kernel_pd = 0;
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Range_allocator * ram = platform()->ram_alloc();
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bool kernel_pd_ok =
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ram->alloc_aligned(Kernel::pd_size(), &kernel_pd,
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Kernel::pd_alignment_log2()).is_ok();
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if (!kernel_pd_ok) {
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PERR("failed to allocate kernel object");
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throw Root::Quota_exceeded();
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}
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/* create kernel object */
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_id = Kernel::new_pd(kernel_pd, this);
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if (!_id) {
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PERR("failed to create kernel object");
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throw Root::Unavailable();
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}
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_tlb = (Tlb *)kernel_pd;
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}
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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 't' to protection domain
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*
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* \return 0 on success or
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* -1 if failed
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*/
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int bind_thread(Platform_thread * t)
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{
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/* is this the first and therefore main thread in this PD? */
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if (!_main_thread)
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{
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/* annotate that we've got a main thread from now on */
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_main_thread = t->id();
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return t->join_pd(this, 1, Address_space::weak_ptr());
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}
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return t->join_pd(this, 0, Address_space::weak_ptr());
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}
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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)
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{
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if (!parent.valid()) {
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PERR("parent invalid");
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return -1;
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}
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_parent = parent;
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return 0;
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}
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/***************
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** Accessors **
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***************/
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unsigned const id() { return _id; }
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char const * const label() { return _label; }
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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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