127 lines
2.9 KiB
C++
127 lines
2.9 KiB
C++
/*
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* \brief Protection-domain facility
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* \author Norman Feske
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* \date 2009-10-02
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*/
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/*
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* Copyright (C) 2009-2013 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/printf.h>
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/* core includes */
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#include <platform_pd.h>
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#include <platform.h>
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#include <util.h>
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using namespace Genode;
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using namespace Codezero;
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/***************************
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** Public object members **
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***************************/
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int Platform_pd::bind_thread(Platform_thread *thread)
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{
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/* allocate new thread at the kernel */
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struct task_ids ids = { 1, _space_id, TASK_ID_INVALID };
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int ret = l4_thread_control(THREAD_CREATE | TC_SHARE_SPACE, &ids);
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if (ret < 0) {
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PERR("l4_thread_control returned %d, tid=%d\n", ret, ids.tid);
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return -1;
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}
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/* allocate UTCB for new thread */
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int utcb_idx;
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for (utcb_idx = 0; utcb_idx < MAX_THREADS_PER_PD; utcb_idx++)
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if (!utcb_in_use[utcb_idx]) break;
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if (utcb_idx == MAX_THREADS_PER_PD) {
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PERR("UTCB allocation failed");
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return -2;
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}
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/* mark UTCB as being in use */
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utcb_in_use[utcb_idx] = true;
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/* map UTCB area for the first thread of a new PD */
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if (utcb_idx == 0) {
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void *utcb_phys = 0;
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if (!platform()->ram_alloc()->alloc(UTCB_AREA_SIZE, &utcb_phys)) {
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PERR("could not allocate physical pages for UTCB");
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return -3;
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}
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ret = l4_map(utcb_phys, (void *)UTCB_VIRT_BASE,
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UTCB_AREA_SIZE/get_page_size(), MAP_USR_RW, ids.tid);
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if (ret < 0) {
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PERR("UTCB mapping into new PD failed, ret=%d", ret);
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return -4;
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}
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}
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addr_t utcb_addr = UTCB_VIRT_BASE + utcb_idx*sizeof(struct utcb);
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thread->_assign_physical_thread(ids.tid, _space_id, utcb_addr,
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this->Address_space::weak_ptr());
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return 0;
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}
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void Platform_pd::unbind_thread(Platform_thread *thread)
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{
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/* find UTCB index of thread */
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unsigned utcb_idx;
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for (utcb_idx = 0; utcb_idx < MAX_THREADS_PER_PD; utcb_idx++)
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if (thread->utcb() == UTCB_VIRT_BASE + utcb_idx*sizeof(struct utcb))
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break;
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if (utcb_idx == MAX_THREADS_PER_PD) {
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PWRN("could not find UTCB index of thread");
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return;
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}
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utcb_in_use[utcb_idx] = false;
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PWRN("not fully implemented");
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}
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Platform_pd::Platform_pd(bool core)
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{
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PWRN("not yet implemented");
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}
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Platform_pd::Platform_pd(char const *, signed pd_id, bool create)
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: _space_id(TASK_ID_INVALID)
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{
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_space_id = TASK_ID_INVALID;
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/* mark all UTCBs of the new PD as free */
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for (int i = 0; i < MAX_THREADS_PER_PD; i++)
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utcb_in_use[i] = false;
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struct task_ids ids = { TASK_ID_INVALID, TASK_ID_INVALID, TASK_ID_INVALID };
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int ret = l4_thread_control(THREAD_CREATE | TC_NEW_SPACE, &ids);
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if (ret < 0) {
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PERR("l4_thread_control(THREAD_CREATE | TC_NEW_SPACE) returned %d", ret);
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return;
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}
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/* set space ID to valid value to indicate success */
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_space_id = ids.spid;
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}
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Platform_pd::~Platform_pd()
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{
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PWRN("not yet implemented");
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}
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