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dd2e006309
Prerequisite to get rid of the base-nova special native_cap method in cpu_session. Vancouver/Seoul bootstrap code gets also much simpler. Issue #478
62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
/*
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* \brief Helper code used by core as base framework
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* \author Alexander Boettcher
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* \date 2012-08-08
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*/
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/*
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* Copyright (C) 2012-2013 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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#ifndef _NOVA__INCLUDE__UTIL_H_
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#define _NOVA__INCLUDE__UTIL_H_
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#include <base/printf.h>
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#include <base/thread.h>
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__attribute__((always_inline))
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inline void nova_die(const char * text = 0)
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{
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/*
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* If thread is de-constructed the sessions are already gone.
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* Be careful when enabling printf here.
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*/
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while (1)
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asm volatile ("ud2a" : : "a"(text));
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}
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inline void request_event_portal(Genode::Native_capability const &cap,
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Genode::addr_t sel, Genode::addr_t event,
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unsigned short log2_count = 0)
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{
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using namespace Nova;
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Utcb *utcb = (Utcb *)Genode::Thread_base::myself()->utcb();
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/* save original receive window */
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Crd orig_crd = utcb->crd_rcv;
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/* request event-handler portal */
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utcb->crd_rcv = Obj_crd(sel, log2_count);
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utcb->msg[0] = event;
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utcb->msg[1] = log2_count;
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utcb->set_msg_word(2);
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uint8_t res = call(cap.local_name());
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if (res)
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PERR("request of event (%lu) capability selector failed", event);
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/* restore original receive window */
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utcb->crd_rcv = orig_crd;
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}
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inline void request_native_ec_cap(Genode::Native_capability const &cap,
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Genode::addr_t sel) {
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request_event_portal(cap, sel , ~0U, 0); }
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#endif /* _NOVA__INCLUDE__UTIL_H_ */
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