96 lines
1.9 KiB
C++
96 lines
1.9 KiB
C++
/*
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* \brief Kernel backend for virtual machines
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* \author Martin Stein
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* \date 2013-10-30
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*/
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/*
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* Copyright (C) 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 _KERNEL__VM_H_
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#define _KERNEL__VM_H_
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/* Genode includes */
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#include <cpu/cpu_state.h>
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/* core includes */
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#include <kernel/scheduler.h>
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#include <kernel/kernel.h>
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#include <kernel/pd.h>
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#include <kernel/signal_receiver.h>
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namespace Kernel
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{
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/**
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* Kernel backend for a virtual machine
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*/
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class Vm;
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class Vm_ids : public Id_allocator<MAX_VMS> { };
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typedef Object_pool<Vm> Vm_pool;
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Vm_ids * vm_ids();
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Vm_pool * vm_pool();
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}
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class Kernel::Vm : public Object<Vm, MAX_VMS, Vm_ids, vm_ids, vm_pool>,
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public Execution_context
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{
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private:
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Genode::Cpu_state_modes * const _state;
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Signal_context * const _context;
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public:
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/**
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* Constructor
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*
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* \param state initial CPU state
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* \param context signal for VM exceptions other than interrupts
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*/
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Vm(Genode::Cpu_state_modes * const state,
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Signal_context * const context)
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:
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_state(state), _context(context)
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{
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/* set VM to least priority by now */
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priority = 0;
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}
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/****************
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** Vm_session **
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****************/
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void run() { cpu_scheduler()->insert(this); }
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void pause() { cpu_scheduler()->remove(this); }
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/***********************
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** Execution_context **
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***********************/
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void handle_exception()
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{
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switch(_state->cpu_exception) {
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case Genode::Cpu_state::INTERRUPT_REQUEST:
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case Genode::Cpu_state::FAST_INTERRUPT_REQUEST:
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handle_interrupt();
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return;
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default:
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cpu_scheduler()->remove(this);
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_context->submit(1);
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}
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}
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void proceed() { mtc()->continue_vm(_state); }
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};
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#endif /* _KERNEL__VM_H_ */
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