109 lines
2.5 KiB
C++
109 lines
2.5 KiB
C++
/*
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* \brief Kernel backend for protection domains
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* \author Martin Stein
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* \author Stefan Kalkowski
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* \date 2012-11-30
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*/
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/*
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* Copyright (C) 2012-2017 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__KERNEL__PD_H_
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#define _CORE__KERNEL__PD_H_
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/* core includes */
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#include <hw/assert.h>
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#include <cpu.h>
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#include "core_interface.h"
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#include "object.h"
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#include <translation_table.h>
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namespace Genode {
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class Platform_pd;
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}
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namespace Kernel
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{
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class Cpu;
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/**
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* Kernel backend of protection domains
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*/
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class Pd;
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}
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class Kernel::Pd : public Kernel::Object
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{
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public:
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static constexpr unsigned max_cap_ids = 1 << (sizeof(capid_t) * 8);
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using Capid_allocator = Genode::Bit_allocator<max_cap_ids>;
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private:
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Hw::Page_table &_table;
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Genode::Platform_pd &_platform_pd;
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Capid_allocator _capid_alloc { };
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Object_identity_reference_tree _cap_tree { };
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public:
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Genode::Cpu::Mmu_context mmu_regs;
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/**
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* Constructor
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*
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* \param table translation table of the PD
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* \param platform_pd core object of the PD
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*/
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Pd(Hw::Page_table &table,
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Genode::Platform_pd &platform_pd)
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: _table(table), _platform_pd(platform_pd),
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mmu_regs((addr_t)&table)
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{
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capid_t invalid = _capid_alloc.alloc();
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assert(invalid == cap_id_invalid());
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}
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~Pd()
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{
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while (Object_identity_reference *oir = _cap_tree.first())
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oir->~Object_identity_reference();
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}
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static capid_t syscall_create(void * const dst,
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Hw::Page_table &tt,
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Genode::Platform_pd &pd)
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{
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return call(call_id_new_pd(), (Call_arg)dst,
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(Call_arg)&tt, (Call_arg)&pd);
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}
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static void syscall_destroy(Pd * const pd) {
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call(call_id_delete_pd(), (Call_arg)pd); }
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/**
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* Check whether the given 'cpu' needs to do some maintainance
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* work, after this pd has had changes in its page-tables
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*/
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bool invalidate_tlb(Cpu & cpu, addr_t addr, size_t size);
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/***************
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** Accessors **
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***************/
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Genode::Platform_pd &platform_pd() { return _platform_pd; }
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Hw::Page_table &translation_table() { return _table; }
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Capid_allocator &capid_alloc() { return _capid_alloc; }
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Object_identity_reference_tree &cap_tree() { return _cap_tree; }
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};
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#endif /* _CORE__KERNEL__PD_H_ */
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