1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS 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; LOSS 22 * 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 OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #pragma once 30 31 #if __riscv 32 33 /** 34 * @file sys/hwprobe.h 35 * @brief RISC-V hardware probing. 36 */ 37 38 #include <sys/cdefs.h> 39 #include <sys/types.h> 40 41 /* Pull in struct riscv_hwprobe and corresponding constants. */ 42 #include <asm/hwprobe.h> 43 44 __BEGIN_DECLS 45 46 /** 47 * [__riscv_hwprobe(2)](https://docs.kernel.org/riscv/hwprobe.html) 48 * queries hardware characteristics. 49 * 50 * A `__cpu_count` of 0 and null `__cpus` means "all online cpus". 51 * 52 * Returns 0 on success and returns an error number on failure. 53 */ 54 int __riscv_hwprobe(struct riscv_hwprobe* _Nonnull __pairs, size_t __pair_count, size_t __cpu_count, unsigned long* _Nullable __cpus, unsigned __flags); 55 56 /** 57 * The type of the second argument passed to riscv64 ifunc resolvers. 58 * This argument allows riscv64 ifunc resolvers to call __riscv_hwprobe() 59 * without worrying about whether that relocation is resolved before 60 * the ifunc resolver is called. 61 */ 62 typedef int (*__riscv_hwprobe_t)(struct riscv_hwprobe* _Nonnull __pairs, size_t __pair_count, size_t __cpu_count, unsigned long* _Nullable __cpus, unsigned __flags); 63 64 __END_DECLS 65 66 #endif 67