39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
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/*****************************************************************************
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* Fast function for filling cache-inhibited memory regions via h-call.
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*
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* Copyright 2015 Red Hat, Inc.
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*
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* This program and the accompanying materials
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* are made available under the terms of the BSD License
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* which accompanies this distribution, and is available at
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* http://www.opensource.org/licenses/bsd-license.php
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*
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* Contributors:
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* Thomas Huth, Red Hat Inc. - initial implementation
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*****************************************************************************/
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#include <cache.h>
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#include <string.h>
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typedef unsigned long type_u;
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/**
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* fast_rfill is the implementation of the FAST_RFILL macro with h-calls.
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* This is defined here instead of cache.h since we need a temporary
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* local buffer - and that caused stack size problems in engine() when
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* we used it directly in the FAST_RFILL macro.
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*/
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void fast_rfill(char *dst, long size, char pat)
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{
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type_u buf[64];
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memset(buf, pat, size < sizeof(buf) ? size : sizeof(buf));
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while (size > sizeof(buf)) {
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FAST_MRMOVE(buf, dst, sizeof(buf));
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dst += sizeof(buf);
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size -= sizeof(buf);
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}
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FAST_MRMOVE(buf, dst, size);
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}
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