| /* |
| * 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 |
