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f186587cab
Besides unifying the Msgbuf_base classes across all platforms, this patch merges the Ipc_marshaller functionality into Msgbuf_base, which leads to several further simplifications. For example, this patch eventually moves the Native_connection_state and removes all state from the former Ipc_server to the actual server loop, which not only makes the flow of control and information much more obvious, but is also more flexible. I.e., on NOVA, we don't even have the notion of reply-and-wait. Now, we are no longer forced to pretend otherwise. Issue #1832
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 _INCLUDE__NOVA__UTIL_H_
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#define _INCLUDE__NOVA__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 (res=%u)", event, res);
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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 /* _INCLUDE__NOVA__UTIL_H_ */
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