75 lines
1.6 KiB
C++
Executable File
75 lines
1.6 KiB
C++
Executable File
/*
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* \brief Pager support for Microblaze Kernel
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* \author Norman Feske
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* \author Martin Stein
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* \date 2010-09-23
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*/
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/*
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* Copyright (C) 2010-2013 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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/* Genode includes */
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#include <base/ipc_pager.h>
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#include <base/printf.h>
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/* kernel includes */
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#include <kernel/syscalls.h>
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using namespace Genode;
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void Ipc_pager::wait_for_fault()
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{
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typedef Kernel::Paging::Request Request;
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while (1) {
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/* wait for fault message */
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unsigned const msg_length=Kernel::ipc_serve(0);
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/* check message format */
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if (msg_length==sizeof(Request)){
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_request=*((Request*)Thread_base::myself()->utcb());
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// PERR(
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// "Recieved pagefault, va=%p, tid=%i, pid=%i",
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// _request.virtual_page.address(),
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// _request.source.tid,
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// _request.virtual_page.protection_id());
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return;
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}
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}
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}
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void Ipc_pager::reply_and_wait_for_fault()
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{
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/* load mapping to tlb (not to be considered permanent) */
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if (_mapping.valid())
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Kernel::tlb_load(
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_mapping.physical_page.address(),
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_mapping.virtual_page.address(),
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_request.virtual_page.protection_id(),
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_mapping.physical_page.size(),
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_mapping.physical_page.permissions());
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// PERR(
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// "Resoluted, pa=%p, va=%p, tid=%i, pid=%i",
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// _mapping.physical_page.address(),
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// _mapping.virtual_page.address(),
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// _request.source.tid,
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// _request.virtual_page.protection_id());
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/* wake up faulter if mapping succeeded */ acknowledge_wakeup();
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/* wait for next page fault */ wait_for_fault();
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}
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