46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/*
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* \brief Core-internal utilities
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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) 2009-2017 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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#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/log.h>
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/* base-internal includes */
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#include <base/internal/page_size.h>
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#include <platform_thread.h>
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namespace Genode {
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constexpr size_t get_super_page_size_log2() { return 22; }
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constexpr size_t get_super_page_size() { return 1 << get_super_page_size_log2(); }
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inline addr_t trunc_page(addr_t addr) { return addr & _align_mask(get_page_size_log2()); }
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inline addr_t round_page(addr_t addr) { return trunc_page(addr + get_page_size() - 1); }
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inline addr_t map_src_addr(addr_t /* core_local */, addr_t phys) { return phys; }
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inline size_t constrain_map_size_log2(size_t size_log2)
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{
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/* Nova::Mem_crd order has 5 bits available and is in 4K page units */
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enum { MAX_MAP_LOG2 = (1U << 5) - 1 + 12 };
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return size_log2 > MAX_MAP_LOG2 ? (size_t)MAX_MAP_LOG2 : size_log2;
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}
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}
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#endif /* _CORE__INCLUDE__UTIL_H_ */
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