/* * Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __ASM_CPUFEATURE_H #define __ASM_CPUFEATURE_H #include <asm/hwcap.h> /* * In the arm64 world (as in the ARM world), elf_hwcap is used both internally * in the kernel and for user space to keep track of which optional features * are supported by the current system. So let's map feature 'x' to HWCAP_x. * Note that HWCAP_x constants are bit fields so we need to take the log. */ #define MAX_CPU_FEATURES (8 * sizeof(elf_hwcap)) #define cpu_feature(x) ilog2(HWCAP_ ## x) static inline bool cpu_have_feature(unsigned int num) { return elf_hwcap & (1UL << num); } #endif