103 lines
2.6 KiB
C
103 lines
2.6 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) 2012-2017 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 Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__NOVA__UTIL_H_
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#define _INCLUDE__NOVA__UTIL_H_
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#include <base/log.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::addr_t const cap,
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Genode::addr_t const sel, Genode::addr_t event)
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{
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Genode::Thread * myself = Genode::Thread::myself();
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Nova::Utcb *utcb = reinterpret_cast<Nova::Utcb *>(myself->utcb());
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/* save original receive window */
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Nova::Crd orig_crd = utcb->crd_rcv;
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/* request event-handler portal */
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utcb->crd_rcv = Nova::Obj_crd(sel, 0);
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utcb->msg()[0] = event;
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utcb->set_msg_word(1);
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Genode::uint8_t res = Nova::call(cap);
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/* restore original receive window */
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utcb->crd_rcv = orig_crd;
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if (res)
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Genode::error("request of event (", Genode::Hex(event), ") ",
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"capability selector failed (res=", res, ")");
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}
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inline void request_native_ec_cap(Genode::addr_t const cap,
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Genode::addr_t const sel)
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{
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request_event_portal(cap, sel , ~0UL);
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}
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inline void request_signal_sm_cap(Genode::addr_t const cap,
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Genode::addr_t const sel)
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{
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request_event_portal(cap, sel, ~0UL - 1);
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}
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inline void translate_remote_pager(Genode::addr_t const cap,
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Genode::addr_t const sel)
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{
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Genode::Thread * myself = Genode::Thread::myself();
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Nova::Utcb *utcb = reinterpret_cast<Nova::Utcb *>(myself->utcb());
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/* save original receive window */
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Nova::Crd orig_crd = utcb->crd_rcv;
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utcb->crd_rcv = Nova::Obj_crd();
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Genode::uint8_t res = Nova::NOVA_OK;
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enum {
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TRANSLATE = true, THIS_PD = false, NON_GUEST = false, HOTSPOT = 0
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};
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/* translate one item */
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utcb->msg()[0] = 0xaffe;
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utcb->set_msg_word(1);
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Nova::Obj_crd obj_crd(sel, 0);
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if (utcb->append_item(obj_crd, HOTSPOT, THIS_PD, NON_GUEST, TRANSLATE))
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/* trigger the translation */
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res = Nova::call(cap);
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/* restore original receive window */
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utcb->crd_rcv = orig_crd;
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if (res != Nova::NOVA_OK)
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Genode::error("setting exception portals for vCPU failed res=", res);
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}
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#endif /* _INCLUDE__NOVA__UTIL_H_ */
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