1 /* $NetBSD: cpu_topology.h,v 1.2 2020/02/15 08:16:11 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 2020 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #ifndef _ARM_CPU_TOPOLOGY_H_ 32 #define _ARM_CPU_TOPOLOGY_H_ 33 34 /* 35 * ARMv7 and ARMv8 compatible CPU topology support. 36 * 37 * arm_cpu_do_topology(cpuinfo) 38 * 39 * Call arm_cpu_do_topology() in cpu_attach(). It will update the topology 40 * view of relative speed. 41 * 42 * The CPU frontend can set the "capacity_dmips_mhz" property for this CPU, 43 * and arm_cpu_do_topology() will update the system view of this and other 44 * CPUs relative speeds 45 * 46 * arm_cpu_topology_set(cpuinfo, mpidr) 47 * 48 * arm_cpu_topology_set() is provided for locore and the boot CPU, 49 * and application CPUs. It updates data for the current CPU. 50 */ 51 52 #include <sys/param.h> 53 #include <sys/cpu.h> 54 55 void arm_cpu_do_topology(struct cpu_info * const); 56 void arm_cpu_topology_set(struct cpu_info * const, mpidr_t); 57 58 #endif /* _ARM_CPU_TOPOLOGY_H_ */ 59