38 lines
1000 B
C++
38 lines
1000 B
C++
/*
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* \brief Implementation of the cache operations
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* \author Christian Prochaska
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* \date 2014-05-13
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*/
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/*
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* Copyright (C) 2014-2017 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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#include <kernel/interface.h>
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#include <base/internal/page_size.h>
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#include <cpu/cache.h>
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#include <util/misc_math.h>
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void Genode::cache_coherent(Genode::addr_t addr, Genode::size_t size)
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{
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using namespace Genode;
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/**
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* The kernel accepts the 'cache_coherent_region' call for one designated
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* page only. Otherwise, it just ignores the call to limit the time being
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* uninteruppptible in the kernel. Therefor, we have to loop if more than
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* one page is affected by the given region.
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*/
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while (size) {
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addr_t next_page = align_addr(addr+1, get_page_size_log2());
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size_t s = min(size, next_page - addr);
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Kernel::cache_coherent_region(addr, s);
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addr += s;
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size -= s;
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}
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}
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