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https://github.com/genodelabs/genode.git
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117 lines
3.2 KiB
C
117 lines
3.2 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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Genode::Thread_base * myself = Genode::Thread_base::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, 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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Genode::uint8_t res = Nova::call(cap.local_name());
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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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PERR("request of event (%lu) capability selector failed", event);
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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 const sel,
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unsigned const no_pager_cap = 0)
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{
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request_event_portal(cap, sel , ~0UL, no_pager_cap);
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}
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inline void request_signal_sm_cap(Genode::Native_capability 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, 0);
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}
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inline void delegate_vcpu_portals(Genode::Native_capability const &cap,
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Genode::addr_t const sel)
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{
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Genode::Thread_base * myself = Genode::Thread_base::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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TRANSFER_ITEMS = 1U << (Nova::NUM_INITIAL_VCPU_PT_LOG2 - 1)
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};
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/* prepare translation items for every portal separately */
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for (unsigned half = 0; !res && half < 2; half++) {
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/* translate half of portals - due to size constraints on 64bit */
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utcb->msg[0] = half;
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utcb->set_msg_word(1);
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/* add one translate item per portal */
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for (unsigned i = 0; !res && i < TRANSFER_ITEMS; i++) {
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Nova::Obj_crd obj_crd(sel + half * TRANSFER_ITEMS + i, 0);
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if (!utcb->append_item(obj_crd, HOTSPOT, THIS_PD, NON_GUEST,
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TRANSLATE))
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res = 0xff;
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}
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if (res != Nova::NOVA_OK)
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break;
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/* trigger the translation */
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res = Nova::call(cap.local_name());
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}
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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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PERR("setting exception portals for vCPU failed %u", res);
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}
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#endif /* _NOVA__INCLUDE__UTIL_H_ */
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