47 lines
909 B
C++
47 lines
909 B
C++
/*
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* \brief Paravirtualized access to serial device for a Trustzone VM
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* \author Martin Stein
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* \date 2015-10-23
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*/
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/*
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* Copyright (C) 2015-2017 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 _SERIAL_DRIVER_H_
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#define _SERIAL_DRIVER_H_
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/* Genode includes */
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#include <base/attached_ram_dataspace.h>
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/* local includes */
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#include <vm_base.h>
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namespace Genode { class Serial_driver; }
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class Genode::Serial_driver
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{
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private:
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enum { BUF_SIZE = 4096 };
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Attached_ram_dataspace _buf;
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addr_t _off = 0;
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void _push(char c) { _buf.local_addr<char>()[_off++] = c; }
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void _flush();
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void _send(Vm_base &vm);
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public:
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void handle_smc(Vm_base &vm);
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Serial_driver(Ram_allocator &ram) : _buf(&ram, BUF_SIZE) { }
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};
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#endif /* _SERIAL_DRIVER_H_ */
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