96eb82574a
* Acknowledge receive of page-fault signal with ack_signal, but restart thread execution separately * use kill_signal_context when disolving a pager_object to prevent race * Remove bureaucracy in form of Thread_event and Signal_ack_handler * remove dead code in riscv, namely Thread_base definition * translation_table_insertions function for ARM drops out, which was overcautious
89 lines
2.1 KiB
C++
89 lines
2.1 KiB
C++
/*
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* \brief RM- and pager implementations specific for base-hw and core
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* \author Martin Stein
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* \author Stefan Kalkowski
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* \date 2012-02-12
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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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/* core includes */
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#include <pager.h>
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#include <rm_session_component.h>
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#include <platform.h>
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#include <platform_pd.h>
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#include <platform_thread.h>
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#include <translation_table.h>
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/* base-internal includes */
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using namespace Genode;
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/***************
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** Rm_client **
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***************/
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void Rm_client::unmap(addr_t, addr_t virt_base, size_t size)
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{
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Locked_ptr<Address_space> locked_address_space(_address_space);
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if (locked_address_space.valid())
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locked_address_space->flush(virt_base, size);
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}
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/**********************
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** Pager_entrypoint **
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**********************/
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void Pager_entrypoint::entry()
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{
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Untyped_capability cap;
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while (1)
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{
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if (cap.valid()) Kernel::ack_signal(Capability_space::capid(cap));
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/* receive fault */
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if (Kernel::await_signal(Capability_space::capid(_cap))) continue;
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Pager_object *po = *(Pager_object**)Thread::myself()->utcb()->data();
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cap = po->cap();
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if (!po) continue;
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/* fetch fault data */
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Platform_thread * const pt = (Platform_thread *)po->badge();
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if (!pt) {
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Genode::warning("failed to get platform thread of faulter");
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continue;
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}
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_fault.ip = pt->kernel_object()->ip;
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_fault.addr = pt->kernel_object()->fault_addr();
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_fault.writes = pt->kernel_object()->fault_writes();
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/* try to resolve fault directly via local region managers */
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if (po->pager(*this)) continue;
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/* apply mapping that was determined by the local region managers */
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{
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Locked_ptr<Address_space> locked_ptr(pt->address_space());
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if (!locked_ptr.valid()) continue;
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Hw::Address_space * as = static_cast<Hw::Address_space*>(&*locked_ptr);
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as->insert_translation(_mapping.virt(), _mapping.phys(),
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_mapping.size(), _mapping.flags());
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}
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/* let pager object go back to no-fault state */
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po->wake_up();
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}
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}
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