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      1 /*	$NetBSD: cpu_topology.h,v 1.3 2021/12/11 19:24:20 mrg 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  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _ARM_CPU_TOPOLOGY_H_
     30 #define _ARM_CPU_TOPOLOGY_H_
     31 
     32 /*
     33  * ARMv7 and ARMv8 compatible CPU topology support.
     34  *
     35  * arm_cpu_do_topology(cpuinfo)
     36  *
     37  * Call arm_cpu_do_topology() in cpu_attach(). It will update the topology
     38  * view of relative speed.
     39  *
     40  * The CPU frontend can set the "capacity_dmips_mhz" property for this CPU,
     41  * and arm_cpu_do_topology() will update the system view of this and other
     42  * CPUs relative speeds
     43  *
     44  * arm_cpu_topology_set(cpuinfo, mpidr)
     45  *
     46  * arm_cpu_topology_set() is provided for locore and the boot CPU,
     47  * and application CPUs.  It updates data for the current CPU.
     48  */
     49 
     50 #include <sys/param.h>
     51 #include <sys/cpu.h>
     52 
     53 void arm_cpu_do_topology(struct cpu_info * const);
     54 void arm_cpu_topology_set(struct cpu_info * const, mpidr_t);
     55 
     56 #endif /* _ARM_CPU_TOPOLOGY_H_ */
     57