fd401bdf53
This patch cleans up the thread API and comes with the following noteworthy changes: - Introduced Cpu_session::Weight type that replaces a formerly used plain integer value to prevent the accidental mix-up of arguments. - The enum definition of Cpu_session::DEFAULT_WEIGHT moved to Cpu_session::Weight::DEFAULT_WEIGHT - New Thread constructor that takes a 'Env &' as first argument. The original constructors are now marked as deprecated. For the common use case where the default 'Weight' and 'Affinity' are used, a shortcut is provided. In the long term, those two constructors should be the only ones to remain. - The former 'Thread<>' class template has been renamed to 'Thread_deprecated'. - The former 'Thread_base' class is now called 'Thread'. - The new 'name()' accessor returns the thread's name as 'Name' object as centrally defined via 'Cpu_session::Name'. It is meant to replace the old-fashioned 'name' method that takes a buffer and size as arguments. - Adaptation of the thread test to the new API Issue #1954
136 lines
2.5 KiB
C++
136 lines
2.5 KiB
C++
/*
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* \brief Pager
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* \author Norman Feske
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* \date 2015-05-01
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*/
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/*
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* Copyright (C) 2015 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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/* Genode includes */
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#include <base/sleep.h>
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/* core includes */
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#include <pager.h>
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#include <core_capability_space.h>
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#include <install_mapping.h>
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/* base-internal includes */
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#include <base/internal/capability_space_sel4.h>
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/* seL4 includes */
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#include <sel4/sel4.h>
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#include <sel4/arch/pfIPC.h>
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using namespace Genode;
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static bool const verbose = false;
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struct Fault_info
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{
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addr_t ip = 0;
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addr_t pf = 0;
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bool write = 0;
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Fault_info(seL4_MessageInfo_t msg_info)
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:
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ip(seL4_GetMR(0)),
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pf(seL4_GetMR(1)),
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write(seL4_Fault_isWriteFault(seL4_GetMR(3)))
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{
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if (verbose)
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PINF("PF: ip=0x%lx, pf=0x%lx, write=%d", ip, pf, write);
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}
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};
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/***************
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** IPC pager **
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***************/
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void Ipc_pager::wait_for_fault()
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{
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_last = 0;
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reply_and_wait_for_fault();
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}
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void Ipc_pager::reply_and_wait_for_fault()
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{
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if (_last)
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install_mapping(_reply_mapping, _last);
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seL4_Word badge = Rpc_obj_key::INVALID;
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seL4_MessageInfo_t page_fault_msg_info;
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if (_last) {
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seL4_MessageInfo_t const reply_msg = seL4_MessageInfo_new(0, 0, 0, 0);
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page_fault_msg_info =
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seL4_ReplyRecv(Thread::myself()->native_thread().ep_sel, reply_msg, &badge);
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} else {
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page_fault_msg_info =
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seL4_Recv(Thread::myself()->native_thread().ep_sel, &badge);
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}
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Fault_info const fault_info(page_fault_msg_info);
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_pf_ip = fault_info.ip;
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_pf_addr = fault_info.pf;
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_pf_write = fault_info.write;
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_last = badge;
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}
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void Ipc_pager::acknowledge_wakeup()
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{
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PDBG("not implemented");
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}
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Ipc_pager::Ipc_pager() : _last(0) { }
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/******************
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** Pager object **
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******************/
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void Pager_object::wake_up()
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{
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PDBG("not implemented");
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}
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void Pager_object::unresolved_page_fault_occurred()
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{
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state.unresolved_page_fault = true;
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}
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/**********************
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** Pager entrypoint **
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**********************/
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Untyped_capability Pager_entrypoint::_pager_object_cap(unsigned long badge)
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{
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/*
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* Create minted endpoint capability of the pager entrypoint.
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* The badge of the page-fault message is used to find the pager
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* object for faulted thread.
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*/
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Rpc_obj_key rpc_obj_key((addr_t)badge);
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Untyped_capability ep_cap(Capability_space::create_ep_cap(*this));
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return Capability_space::create_rpc_obj_cap(ep_cap, nullptr, rpc_obj_key);
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}
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