1 /* $NetBSD: cpu_counter.h,v 1.2 2012/08/29 18:45:40 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _ARM_CPU_COUNTER_H_ 33 #define _ARM_CPU_COUNTER_H_ 34 35 /* 36 * ARM specific support for CPU counter (ARM11 and Cortex only). 37 * If __HAVE_CPU_COUNTER is defined for any other CPU_*, it will crash. 38 */ 39 40 #ifdef _KERNEL 41 42 #include <sys/cpu.h> 43 44 #if defined(CPU_CORTEX) || defined(CPU_ARM11) 45 #define cpu_hascounter() (curcpu()->ci_data.cpu_cc_freq != 0) 46 #else 47 #define cpu_hascounter() false 48 #endif 49 50 #define cpu_counter() cpu_counter32() 51 52 #if defined(CPU_CORTEX) || defined(CPU_ARM11) 53 static __inline uint32_t 54 cpu_counter32(void) 55 { 56 #if defined(CPU_CORTEX) && defined(CPU_ARM11) 57 const bool cortex_p = CPU_ID_CORTEX_P(curcpu()->ci_cpu_id); 58 #elif defined(CPU_CORTEX) 59 const bool cortex_p = true; 60 #elif defined(CPU_ARM11) 61 const bool cortex_p = false; 62 #endif 63 64 if (cortex_p) 65 return armreg_pmccntr_read(); 66 else 67 return armreg_pmccntrv6_read(); 68 } 69 #endif 70 71 static __inline uint64_t 72 cpu_frequency(struct cpu_info *ci) 73 { 74 return ci->ci_data.cpu_cc_freq; 75 } 76 77 #endif /* _KERNEL */ 78 79 #endif /* _ARM_CPU_COUNTER_H_ */ 80