/*
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* Copyright (C) 2001,2002,2003,2004 Philippe Gerum <rpm@xenomai.org>.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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#ifndef _LIB_COBALT_POWERPC_TSC_H
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#define _LIB_COBALT_POWERPC_TSC_H
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static inline unsigned long long cobalt_read_legacy_tsc(void)
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{
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union {
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unsigned long long t;
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unsigned long v[2];
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} u;
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unsigned long __tbu;
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__asm__ __volatile__("1: mfspr %0,269\n"
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"mfspr %1,268\n"
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"mfspr %2,269\n"
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"cmpw %2,%0\n"
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"bne- 1b\n":"=r"(u.v[0]),
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"=r"(u.v[1]), "=r"(__tbu));
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return u.t;
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}
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#endif /* !_LIB_COBALT_POWERPC_TSC_H */
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