arch/x86/include/asm/cpu_common.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (c) 2016 Google, Inc
   4  */
   5
   6 #ifndef __ASM_CPU_COMMON_H
   7 #define __ASM_CPU_COMMON_H
   8
   9 #define IA32_PERF_CTL                   0x199
  10
  11 /**
  12  * cpu_common_init() - Set up common CPU init
  13  *
  14  * This reports BIST failure, enables the LAPIC, updates microcode, enables
  15  * the upper 128-bytes of CROM RAM, probes the northbridge, PCH, LPC and SATA.
  16  *
  17  * @return 0 if OK, -ve on error
  18  */
  19 int cpu_common_init(void);
  20
  21 /**
  22  * cpu_set_flex_ratio_to_tdp_nominal() - Set up the maximum non-turbo rate
  23  *
  24  * If a change is needed, this function will do a soft reset so it takes
  25  * effect.
  26  *
  27  * Some details are available here:
  28  * http://forum.hwbot.org/showthread.php?t=76092
  29  *
  30  * @return 0 if OK, -ve on error
  31  */
  32 int cpu_set_flex_ratio_to_tdp_nominal(void);
  33
  34 #endif