1 /* 2 * Copyright (c) 2015 Google, Inc 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #ifndef __ASM_ARCH_MICROCODE_H 8 #define __ASM_ARCH_MICROCODE_H 9 10 #ifndef __ASSEMBLY__ 11 12 /** 13 * microcode_update_intel() - Apply microcode updates 14 * 15 * Applies any microcode updates in the device tree. 16 * 17 * @return 0 if OK, -EEXIST if the updates were already applied, -ENOENT if 18 * not updates were found, -EINVAL if an update was invalid 19 */ 20 int microcode_update_intel(void); 21 22 /** 23 * microcode_read_rev() - Read the microcode version 24 * 25 * This reads the microcode version of the currently running CPU 26 * 27 * @return microcode version number 28 */ 29 int microcode_read_rev(void); 30 #endif /* __ASSEMBLY__ */ 31 32 #endif 33