mirror of
https://github.com/AsahiLinux/u-boot
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2f0c2f03e7
These functions are the same on modern Intel CPUs, so use common code to
set them.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: return false instead of 0 in cpu_ivybridge_config_tdp_levels();
fix 'muiltiplier' and 'desgn' typos]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
82 lines
2 KiB
C
82 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Common code for Intel CPUs
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*
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* Copyright (c) 2016 Google, Inc
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*/
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#ifndef __ASM_CPU_COMMON_H
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#define __ASM_CPU_COMMON_H
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/* Standard Intel bus clock is fixed at 100MHz */
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enum {
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INTEL_BCLK_MHZ = 100
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};
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struct cpu_info;
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/**
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* cpu_common_init() - Set up common CPU init
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*
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* This reports BIST failure, enables the LAPIC, updates microcode, enables
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* the upper 128-bytes of CROM RAM, probes the northbridge, PCH, LPC and SATA.
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*
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* @return 0 if OK, -ve on error
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*/
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int cpu_common_init(void);
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/**
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* cpu_set_flex_ratio_to_tdp_nominal() - Set up the maximum non-turbo rate
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*
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* If a change is needed, this function will do a soft reset so it takes
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* effect.
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*
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* Some details are available here:
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* http://forum.hwbot.org/showthread.php?t=76092
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*
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* @return 0 if OK, -ve on error
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*/
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int cpu_set_flex_ratio_to_tdp_nominal(void);
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/**
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* cpu_intel_get_info() - Obtain CPU info for Intel CPUs
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*
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* Most Intel CPUs use the same MSR to obtain the clock speed, and use the same
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* features. This function fills in these values, given the value of the base
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* clock in MHz (typically this should be set to 100).
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*
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* @info: cpu_info struct to fill in
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* @bclk_mz: the base clock in MHz
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*
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* @return 0 always
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*/
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int cpu_intel_get_info(struct cpu_info *info, int bclk_mz);
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/**
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* cpu_configure_thermal_target() - Set the thermal target for a CPU
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*
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* This looks up the tcc-offset property and uses it to set the
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* MSR_TEMPERATURE_TARGET value.
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*
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* @dev: CPU device
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* @return 0 if OK, -ENOENT if no target is given in device tree
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*/
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int cpu_configure_thermal_target(struct udevice *dev);
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/**
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* cpu_set_perf_control() - Set the nominal CPU clock speed
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*
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* This sets the clock speed as a multiplier of BCLK
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*
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* @clk_ratio: Ratio to use
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*/
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void cpu_set_perf_control(uint clk_ratio);
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/**
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* cpu_config_tdp_levels() - Check for configurable TDP option
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*
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* @return true if the CPU has configurable TDP (Thermal-design power)
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*/
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bool cpu_config_tdp_levels(void);
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#endif
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