80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/* $NetBSD: cpu_counter.h,v 1.2 2012/08/29 18:45:40 matt Exp $ */
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/*-
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* Copyright (c) 2012 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ARM_CPU_COUNTER_H_
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#define _ARM_CPU_COUNTER_H_
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/*
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* ARM specific support for CPU counter (ARM11 and Cortex only).
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* If __HAVE_CPU_COUNTER is defined for any other CPU_*, it will crash.
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*/
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#ifdef _KERNEL
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#include <sys/cpu.h>
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#if defined(CPU_CORTEX) || defined(CPU_ARM11)
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#define cpu_hascounter() (curcpu()->ci_data.cpu_cc_freq != 0)
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#else
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#define cpu_hascounter() false
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#endif
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#define cpu_counter() cpu_counter32()
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#if defined(CPU_CORTEX) || defined(CPU_ARM11)
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static __inline uint32_t
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cpu_counter32(void)
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{
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#if defined(CPU_CORTEX) && defined(CPU_ARM11)
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const bool cortex_p = CPU_ID_CORTEX_P(curcpu()->ci_cpu_id);
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#elif defined(CPU_CORTEX)
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const bool cortex_p = true;
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#elif defined(CPU_ARM11)
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const bool cortex_p = false;
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#endif
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if (cortex_p)
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return armreg_pmccntr_read();
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else
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return armreg_pmccntrv6_read();
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}
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#endif
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static __inline uint64_t
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cpu_frequency(struct cpu_info *ci)
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{
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return ci->ci_data.cpu_cc_freq;
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}
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#endif /* _KERNEL */
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#endif /* _ARM_CPU_COUNTER_H_ */
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