genode/base-nova/include/nova/util.h
2013-01-10 21:44:47 +01:00

56 lines
1.3 KiB
C++

/*
* \brief Helper code used by core as base framework
* \author Alexander Boettcher
* \date 2012-08-08
*/
/*
* Copyright (C) 2012-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOVA__INCLUDE__UTIL_H_
#define _NOVA__INCLUDE__UTIL_H_
#include <base/printf.h>
#include <base/thread.h>
__attribute__((always_inline))
inline void nova_die(const char * text = 0)
{
/*
* If thread is de-constructed the sessions are already gone.
* Be careful when enabling printf here.
*/
while (1)
asm volatile ("ud2a" : : "a"(text));
}
inline void request_event_portal(Genode::Native_capability cap,
Genode::addr_t exc_base, Genode::addr_t event)
{
using namespace Nova;
Utcb *utcb = (Utcb *)Genode::Thread_base::myself()->utcb();
/* save original receive window */
Crd orig_crd = utcb->crd_rcv;
/* request event-handler portal */
utcb->crd_rcv = Obj_crd(exc_base + event, 0);
utcb->msg[0] = event;
utcb->set_msg_word(1);
uint8_t res = call(cap.local_name());
if (res)
PERR("request of event (%lu) capability selector failed",
event);
/* restore original receive window */
utcb->crd_rcv = orig_crd;
}
#endif /* _NOVA__INCLUDE__UTIL_H_ */