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https://github.com/brain-hackers/u-boot-brain
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55a6b13a75
Modern Intel CPUs use a standard bus clock value of 100MHz, so put this in a common file and tidy up the copies. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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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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#endif
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