136 lines
2.5 KiB
C++
136 lines
2.5 KiB
C++
/*
|
|
* \brief Pager
|
|
* \author Norman Feske
|
|
* \date 2015-05-01
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2015 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
/* Genode includes */
|
|
#include <base/sleep.h>
|
|
|
|
/* core includes */
|
|
#include <pager.h>
|
|
#include <core_capability_space.h>
|
|
#include <install_mapping.h>
|
|
|
|
/* base-internal includes */
|
|
#include <internal/capability_space_sel4.h>
|
|
|
|
/* seL4 includes */
|
|
#include <sel4/sel4.h>
|
|
#include <sel4/arch/pfIPC.h>
|
|
|
|
using namespace Genode;
|
|
|
|
static bool const verbose = false;
|
|
|
|
|
|
struct Fault_info
|
|
{
|
|
addr_t ip = 0;
|
|
addr_t pf = 0;
|
|
bool write = 0;
|
|
|
|
Fault_info(seL4_MessageInfo_t msg_info)
|
|
:
|
|
ip(seL4_GetMR(0)),
|
|
pf(seL4_GetMR(1)),
|
|
write(seL4_Fault_isWriteFault(seL4_GetMR(3)))
|
|
{
|
|
if (verbose)
|
|
PINF("PF: ip=0x%lx, pf=0x%lx, write=%d", ip, pf, write);
|
|
}
|
|
};
|
|
|
|
|
|
/***************
|
|
** IPC pager **
|
|
***************/
|
|
|
|
void Ipc_pager::wait_for_fault()
|
|
{
|
|
_last = 0;
|
|
reply_and_wait_for_fault();
|
|
}
|
|
|
|
|
|
void Ipc_pager::reply_and_wait_for_fault()
|
|
{
|
|
if (_last)
|
|
install_mapping(_reply_mapping, _last);
|
|
|
|
seL4_Word badge = Rpc_obj_key::INVALID;
|
|
|
|
seL4_MessageInfo_t page_fault_msg_info;
|
|
|
|
if (_last) {
|
|
|
|
seL4_MessageInfo_t const reply_msg = seL4_MessageInfo_new(0, 0, 0, 0);
|
|
|
|
page_fault_msg_info =
|
|
seL4_ReplyRecv(Thread_base::myself()->tid().ep_sel, reply_msg, &badge);
|
|
|
|
} else {
|
|
page_fault_msg_info =
|
|
seL4_Recv(Thread_base::myself()->tid().ep_sel, &badge);
|
|
}
|
|
|
|
Fault_info const fault_info(page_fault_msg_info);
|
|
|
|
_pf_ip = fault_info.ip;
|
|
_pf_addr = fault_info.pf;
|
|
_pf_write = fault_info.write;
|
|
|
|
_last = badge;
|
|
}
|
|
|
|
|
|
void Ipc_pager::acknowledge_wakeup()
|
|
{
|
|
PDBG("not implemented");
|
|
}
|
|
|
|
|
|
Ipc_pager::Ipc_pager() : _last(0) { }
|
|
|
|
|
|
/******************
|
|
** Pager object **
|
|
******************/
|
|
|
|
void Pager_object::wake_up()
|
|
{
|
|
PDBG("not implemented");
|
|
}
|
|
|
|
|
|
void Pager_object::unresolved_page_fault_occurred()
|
|
{
|
|
state.unresolved_page_fault = true;
|
|
}
|
|
|
|
|
|
/**********************
|
|
** Pager entrypoint **
|
|
**********************/
|
|
|
|
Untyped_capability Pager_entrypoint::_pager_object_cap(unsigned long badge)
|
|
{
|
|
/*
|
|
* Create minted endpoint capability of the pager entrypoint.
|
|
* The badge of the page-fault message is used to find the pager
|
|
* object for faulted thread.
|
|
*/
|
|
Rpc_obj_key rpc_obj_key((addr_t)badge);
|
|
|
|
Untyped_capability ep_cap(Capability_space::create_ep_cap(*this));
|
|
return Capability_space::create_rpc_obj_cap(ep_cap, nullptr, rpc_obj_key);
|
|
}
|
|
|