181 lines
3.5 KiB
C++
181 lines
3.5 KiB
C++
/*
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* \brief seL4 implementation of the IPC API
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* \author Norman Feske
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* \date 2014-10-14
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*/
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/*
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* Copyright (C) 2014 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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/* Genode includes */
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#include <base/ipc.h>
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#include <base/printf.h>
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#include <base/blocking.h>
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#include <base/thread.h>
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#include <util/misc_math.h>
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/* base-internal includes */
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#include <internal/capability_space.h>
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/* seL4 includes */
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#include <sel4/interfaces/sel4_client.h>
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using namespace Genode;
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/*****************************
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** IPC marshalling support **
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*****************************/
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void Ipc_ostream::_marshal_capability(Native_capability const &cap)
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{
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PDBG("not implemented");
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}
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void Ipc_istream::_unmarshal_capability(Native_capability &cap)
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{
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PDBG("not implemented");
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}
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/*****************
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** Ipc_ostream **
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*****************/
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void Ipc_ostream::_send()
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{
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PDBG("not implemented");
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_write_offset = sizeof(umword_t);
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}
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Ipc_ostream::Ipc_ostream(Native_capability dst, Msgbuf_base *snd_msg)
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:
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Ipc_marshaller((char *)snd_msg->addr(), snd_msg->size()),
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_snd_msg(snd_msg), _dst(dst)
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{
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_write_offset = sizeof(umword_t);
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}
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/*****************
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** Ipc_istream **
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*****************/
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void Ipc_istream::_wait()
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{
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PDBG("not implemented");
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for (;;)
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seL4_Yield();
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_read_offset = sizeof(umword_t);
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}
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Ipc_istream::Ipc_istream(Msgbuf_base *rcv_msg)
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:
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Ipc_unmarshaller((char *)rcv_msg->addr(), rcv_msg->size()),
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_rcv_msg(rcv_msg)
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{
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_read_offset = sizeof(umword_t);
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}
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Ipc_istream::~Ipc_istream() { }
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/****************
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** Ipc_client **
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****************/
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void Ipc_client::_call()
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{
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PDBG("not implemented");
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_write_offset = _read_offset = sizeof(umword_t);
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}
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Ipc_client::Ipc_client(Native_capability const &srv, Msgbuf_base *snd_msg,
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Msgbuf_base *rcv_msg, unsigned short)
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: Ipc_istream(rcv_msg), Ipc_ostream(srv, snd_msg), _result(0)
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{ }
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/****************
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** Ipc_server **
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****************/
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void Ipc_server::_prepare_next_reply_wait()
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{
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/* now we have a request to reply */
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_reply_needed = true;
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/* leave space for return value at the beginning of the msgbuf */
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_write_offset = 2*sizeof(umword_t);
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/* receive buffer offset */
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_read_offset = sizeof(umword_t);
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}
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void Ipc_server::_wait()
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{
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/* wait for new server request */
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PDBG("called, do seL4_Wait");
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seL4_MessageInfo_t const msg_info =
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seL4_Wait(Thread_base::myself()->tid().ep_sel, nullptr);
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PDBG("returned from seL4_Wait, call seL4_Reply");
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PDBG("msg_info: got unwrapped %d", seL4_MessageInfo_get_capsUnwrapped(msg_info));
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PDBG(" got extra caps %d", seL4_MessageInfo_get_extraCaps(msg_info));
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PDBG(" label %d", seL4_MessageInfo_get_label(msg_info));
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if (seL4_MessageInfo_get_capsUnwrapped(msg_info)) {
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PDBG(" badge %d", seL4_CapData_Badge_get_Badge(seL4_GetBadge(0)));
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}
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for (;;)
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seL4_Yield();
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// try { Ipc_istream::_wait(); } catch (Blocking_canceled) { }
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_prepare_next_reply_wait();
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}
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void Ipc_server::_reply()
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{
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try { _send(); } catch (Ipc_error) { }
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_prepare_next_reply_wait();
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}
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void Ipc_server::_reply_wait()
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{
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if (_reply_needed)
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_reply();
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_wait();
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}
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Ipc_server::Ipc_server(Msgbuf_base *snd_msg,
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Msgbuf_base *rcv_msg)
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:
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Ipc_istream(rcv_msg), Ipc_ostream(Native_capability(), snd_msg),
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_reply_needed(false)
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{
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*static_cast<Native_capability *>(this) = Native_capability(Capability_space::create_ep_cap(*Thread_base::myself()));
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}
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