142 lines
2.7 KiB
C++
142 lines
2.7 KiB
C++
/*
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* \brief Dummy pager support for Genode
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* \author Norman Feske
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* \date 2009-10-02
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*/
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/*
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* Copyright (C) 2009-2013 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__BASE__IPC_PAGER_H_
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#define _INCLUDE__BASE__IPC_PAGER_H_
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#include <base/cache.h>
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#include <base/ipc.h>
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#include <base/stdint.h>
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#include <base/native_types.h>
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namespace Genode {
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class Mapping
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{
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public:
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/**
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* Constructor
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*/
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Mapping(addr_t dst_addr, addr_t src_addr,
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Cache_attribute, bool io_mem,
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unsigned l2size = 12, bool rw = true) { }
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/**
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* Construct invalid mapping
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*/
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Mapping() { }
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/**
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* Prepare map operation
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*/
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void prepare_map_operation() { }
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};
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/**
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* Special paging server class
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*/
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class Ipc_pager : public Native_capability
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{
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protected:
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/**
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* Wait for short-message (register) IPC -- pagefault
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*/
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void _wait() { }
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/**
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* Send short flex page and
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* wait for next short-message (register) IPC -- pagefault
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*/
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void _reply_and_wait() { }
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public:
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/**
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* Constructor
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*/
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Ipc_pager() { }
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/**
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* Wait for a new fault received as short message IPC
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*/
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void wait_for_fault() { }
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/**
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* Reply current page-fault and wait for a new one
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*
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* Send short flex page and wait for next short-message (register)
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* IPC -- fault
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*/
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void reply_and_wait_for_fault() { }
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/**
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* Request instruction pointer of current page fault
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*/
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addr_t fault_ip() { return 0; }
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/**
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* Request fault address of current page fault
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*/
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addr_t fault_addr() { return 0; }
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/**
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* Set parameters for next reply
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*/
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void set_reply_mapping(Mapping m) { }
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/**
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* Set destination for next reply
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*/
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void set_reply_dst(Native_capability pager_object) { }
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/**
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* Answer call without sending a flex-page mapping
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*
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* This function is used to acknowledge local calls from one of
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* core's region-manager sessions.
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*/
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void acknowledge_wakeup() { }
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/**
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* Return thread ID of last faulter
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*/
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Native_thread_id last() const { return 0; }
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/**
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* Return badge for faulting thread
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*/
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unsigned long badge() const { return 0; }
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/**
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* Return true if last fault was a write fault
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*/
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bool is_write_fault() const { return false; }
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/**
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* Return true if last fault was an exception
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*/
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bool is_exception() const
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{
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/*
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* Reflection of exceptions is not supported on this platform.
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*/
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return false;
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}
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};
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}
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#endif /* _INCLUDE__BASE__IPC_PAGER_H_ */
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