2147c42ec6
* Enable page-fault messages for regions not directly managed by core * Unify output given when a page-fault occurs related to those regions Fix #2082
110 lines
2.5 KiB
C++
110 lines
2.5 KiB
C++
/*
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* \brief Core-internal utilities
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* \author Martin Stein
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* \date 2012-01-02
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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 _CORE__INCLUDE__UTIL_H_
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#define _CORE__INCLUDE__UTIL_H_
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/* Genode includes */
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#include <rm_session/rm_session.h>
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#include <base/printf.h>
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/* base-internal includes */
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#include <base/internal/page_size.h>
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/* base-hw includes */
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#include <kernel/interface.h>
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namespace Genode
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{
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struct Native_region
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{
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addr_t base;
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size_t size;
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};
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enum {
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ACTIVITY_TABLE_ON_FAULTS = 0,
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};
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/**
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* Get the base mask for the minimal supported page-size
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*/
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constexpr addr_t get_page_mask() { return ~(get_page_size() - 1); }
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/**
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* Round down to the minimal page-size alignment
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*/
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constexpr addr_t trunc_page(addr_t addr) {
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return addr & get_page_mask(); }
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/**
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* Round up to the minimal page-size alignment
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*/
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constexpr addr_t round_page(addr_t addr)
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{ return trunc_page(addr + get_page_size() - 1); }
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/**
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* Return an address rounded down to a specific alignment
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*
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* \param addr original address
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* \param alignm_log2 log2 of the required alignment
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*/
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inline addr_t trunc(addr_t const addr, addr_t const alignm_log2) {
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return (addr >> alignm_log2) << alignm_log2; }
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/**
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* Return wether a pointer fullfills an alignment
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*
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* \param p pointer
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* \param alignm_log2 log2 of the required alignment
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*/
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inline bool aligned(void * const p, addr_t const alignm_log2) {
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return (addr_t)p == trunc((addr_t)p, alignm_log2); }
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/**
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* Round up to a specific alignment
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*/
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inline addr_t round(addr_t const addr, unsigned const alignm_log2)
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{ return trunc(addr + (1<<alignm_log2) - 1, alignm_log2); }
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/**
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* Select source used for map operations
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*/
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inline addr_t map_src_addr(addr_t core_local, addr_t phys) { return phys; }
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/**
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* Return highest supported flexpage size for the given mapping size
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*
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* This function is called by the page-fault handler to determine the
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* mapping granularity to be used for a page-fault answer. If a kernel
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* supports flexible page sizes, this function can just return the
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* argument. If a kernel only supports a certain set of map sizes such
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* as 4K and 4M, this function should select one of those smaller or
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* equal to the argument.
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*/
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inline size_t constrain_map_size_log2(size_t size_log2)
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{
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if (size_log2<20) return 12;
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return 20;
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}
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}
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#endif /* _CORE__INCLUDE__UTIL_H_ */
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