/* $NetBSD: cpu_counter.h,v 1.3 2014/02/26 01:54:10 matt Exp $ */ /*- * Copyright (c) 2012 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _ARM_CPU_COUNTER_H_ #define _ARM_CPU_COUNTER_H_ /* * ARM specific support for CPU counter (ARM11 and Cortex only). * If __HAVE_CPU_COUNTER is defined for any other CPU_*, it will crash. */ #ifdef _KERNEL #include <sys/cpu.h> #if defined(CPU_CORTEX) || defined(CPU_ARM11) #define cpu_hascounter() (curcpu()->ci_data.cpu_cc_freq != 0) #else #define cpu_hascounter() false #endif #define cpu_counter() cpu_counter32() #if defined(CPU_CORTEX) || defined(CPU_ARM11) static __inline uint32_t cpu_counter32(void) { #if defined(CPU_CORTEX) && defined(CPU_ARM11) const bool cortex_p = CPU_ID_CORTEX_P(curcpu()->ci_arm_cpuid); #elif defined(CPU_CORTEX) const bool cortex_p = true; #elif defined(CPU_ARM11) const bool cortex_p = false; #endif if (cortex_p) return armreg_pmccntr_read(); else return armreg_pmccntrv6_read(); } #endif static __inline uint64_t cpu_frequency(struct cpu_info *ci) { return ci->ci_data.cpu_cc_freq; } #endif /* _KERNEL */ #endif /* _ARM_CPU_COUNTER_H_ */ |