1d6a00f01a
Allocate exc_pt_sel inside Thread_base object instead of pager object, since it is a thread specific characteristic. Same for freeing of the thread capabilities: - ec, sc, rs, exc_pt_sel is thread specific and has nothing to do in server nor pager object.
79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
/*
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* \brief NOVA-specific implementation of the Thread API for core
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* \author Norman Feske
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* \author Sebastian Sumpf
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* \date 2010-01-19
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*/
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/*
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* Copyright (C) 2010-2012 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/thread.h>
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#include <base/cap_sel_alloc.h>
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#include <base/printf.h>
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#include <base/sleep.h>
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#include <base/env.h>
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/* NOVA includes */
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#include <nova/syscalls.h>
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/* core includes */
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#include <nova_util.h>
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using namespace Genode;
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/**
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* This function is called for constructing server activations and pager
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* objects. It allocates capability selectors for the thread's execution
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* context and a synchronization-helper semaphore needed for 'Lock'.
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*/
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void Thread_base::_init_platform_thread()
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{
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_tid.ec_sel = cap_selector_allocator()->alloc();
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_tid.sc_sel = ~0; /* not needed within core */
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_tid.rs_sel = cap_selector_allocator()->alloc();
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_tid.pd_sel = cap_selector_allocator()->pd_sel();
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_tid.exc_pt_sel = cap_selector_allocator()->alloc(Nova::NUM_INITIAL_PT_LOG2);
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/* create running semaphore required for locking */
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uint8_t res = Nova::create_sm(_tid.rs_sel, _tid.pd_sel, 0);
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if (res)
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PERR("create_sm returned %u", res);
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}
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void Thread_base::_deinit_platform_thread()
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{
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unmap_local(Nova::Obj_crd(_tid.ec_sel, 0));
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unmap_local(Nova::Obj_crd(_tid.rs_sel, 0));
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unmap_local(Nova::Obj_crd(_tid.exc_pt_sel, Nova::NUM_INITIAL_PT_LOG2));
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cap_selector_allocator()->free(_tid.ec_sel, 0);
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cap_selector_allocator()->free(_tid.rs_sel, 0);
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cap_selector_allocator()->free(_tid.exc_pt_sel, Nova::NUM_INITIAL_PT_LOG2);
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/* revoke utcb */
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Nova::Rights rwx(true, true, true);
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addr_t utcb = reinterpret_cast<addr_t>(&_context->utcb);
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Nova::revoke(Nova::Mem_crd(utcb >> 12, 0, rwx));
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}
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void Thread_base::start()
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{
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/*
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* On NOVA, core never starts regular threads.
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*/
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}
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void Thread_base::cancel_blocking()
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{
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Nova::sm_ctrl(_tid.rs_sel, Nova::SEMAPHORE_UP);
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}
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