cpu_counter.h revision 1.1.18.2
1 1.1.18.2 jdolecek /* $NetBSD: cpu_counter.h,v 1.1.18.2 2017/12/03 11:36:39 jdolecek Exp $ */ 2 1.1.18.2 jdolecek 3 1.1.18.2 jdolecek /* 4 1.1.18.2 jdolecek * Copyright (c) 2000 Soren S. Jorvang. All rights reserved. 5 1.1.18.2 jdolecek * 6 1.1.18.2 jdolecek * Redistribution and use in source and binary forms, with or without 7 1.1.18.2 jdolecek * modification, are permitted provided that the following conditions 8 1.1.18.2 jdolecek * are met: 9 1.1.18.2 jdolecek * 1. Redistributions of source code must retain the above copyright 10 1.1.18.2 jdolecek * notice, this list of conditions, and the following disclaimer. 11 1.1.18.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 12 1.1.18.2 jdolecek * notice, this list of conditions and the following disclaimer in the 13 1.1.18.2 jdolecek * documentation and/or other materials provided with the distribution. 14 1.1.18.2 jdolecek * 15 1.1.18.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 1.1.18.2 jdolecek * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 1.1.18.2 jdolecek * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 1.1.18.2 jdolecek * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 1.1.18.2 jdolecek * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 1.1.18.2 jdolecek * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 1.1.18.2 jdolecek * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 1.1.18.2 jdolecek * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 1.1.18.2 jdolecek * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 1.1.18.2 jdolecek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 1.1.18.2 jdolecek * SUCH DAMAGE. 26 1.1.18.2 jdolecek */ 27 1.1.18.2 jdolecek 28 1.1.18.2 jdolecek /* $NetBSD: cpu_counter.h,v 1.1.18.2 2017/12/03 11:36:39 jdolecek Exp $ */ 29 1.1.18.2 jdolecek /*- 30 1.1.18.2 jdolecek * Copyright (c) 2014 The NetBSD Foundation, Inc. 31 1.1.18.2 jdolecek * All rights reserved. 32 1.1.18.2 jdolecek * 33 1.1.18.2 jdolecek * This code is derived from software contributed to The NetBSD Foundation 34 1.1.18.2 jdolecek * by Matt Thomas of 3am Software Foundry. 35 1.1.18.2 jdolecek * 36 1.1.18.2 jdolecek * Redistribution and use in source and binary forms, with or without 37 1.1.18.2 jdolecek * modification, are permitted provided that the following conditions 38 1.1.18.2 jdolecek * are met: 39 1.1.18.2 jdolecek * 1. Redistributions of source code must retain the above copyright 40 1.1.18.2 jdolecek * notice, this list of conditions and the following disclaimer. 41 1.1.18.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 42 1.1.18.2 jdolecek * notice, this list of conditions and the following disclaimer in the 43 1.1.18.2 jdolecek * documentation and/or other materials provided with the distribution. 44 1.1.18.2 jdolecek * 45 1.1.18.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 46 1.1.18.2 jdolecek * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 47 1.1.18.2 jdolecek * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 48 1.1.18.2 jdolecek * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 49 1.1.18.2 jdolecek * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 50 1.1.18.2 jdolecek * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 51 1.1.18.2 jdolecek * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 52 1.1.18.2 jdolecek * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 53 1.1.18.2 jdolecek * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 54 1.1.18.2 jdolecek * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 55 1.1.18.2 jdolecek * POSSIBILITY OF SUCH DAMAGE. 56 1.1.18.2 jdolecek */ 57 1.1.18.2 jdolecek 58 1.1.18.2 jdolecek #ifndef _RISCV_CPU_COUNTER_H_ 59 1.1.18.2 jdolecek #define _RISCV_CPU_COUNTER_H_ 60 1.1.18.2 jdolecek 61 1.1.18.2 jdolecek /* 62 1.1.18.2 jdolecek * Machine-specific support for CPU counter. 63 1.1.18.2 jdolecek */ 64 1.1.18.2 jdolecek 65 1.1.18.2 jdolecek #include <machine/cpu.h> 66 1.1.18.2 jdolecek 67 1.1.18.2 jdolecek #ifdef _KERNEL 68 1.1.18.2 jdolecek 69 1.1.18.2 jdolecek #define cpu_hascounter() true 70 1.1.18.2 jdolecek #define cpu_counter() cpu_counter32() 71 1.1.18.2 jdolecek 72 1.1.18.2 jdolecek static __inline uint32_t 73 1.1.18.2 jdolecek cpu_counter32(void) 74 1.1.18.2 jdolecek { 75 1.1.18.2 jdolecek uint32_t __count; 76 1.1.18.2 jdolecek __asm("csrr\t%0, cycle" : "=r"(__count)); 77 1.1.18.2 jdolecek return __count; 78 1.1.18.2 jdolecek } 79 1.1.18.2 jdolecek 80 1.1.18.2 jdolecek static __inline uint64_t 81 1.1.18.2 jdolecek cpu_frequency(const struct cpu_info *ci) 82 1.1.18.2 jdolecek { 83 1.1.18.2 jdolecek return ci->ci_data.cpu_cc_freq; 84 1.1.18.2 jdolecek } 85 1.1.18.2 jdolecek 86 1.1.18.2 jdolecek #endif /* _KERNEL */ 87 1.1.18.2 jdolecek 88 1.1.18.2 jdolecek #endif /* !_RISCV_CPU_COUNTER_H_ */ 89
Indexes created Thu Oct 23 22:10:10 GMT 2025