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64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2020-2022 Martin Whitaker.
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//
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// Derived from an extract of memtest86+ init.c:
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//
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// MemTest86+ V5 Specific code (GPL V2.0)
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// By Samuel DEMEULEMEESTER, sdemeule@memtest.org
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// http://www.canardpc.com - http://www.memtest.org
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// ------------------------------------------------
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// init.c - MemTest-86 Version 3.6
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//
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// Released under version 2 of the Gnu Public License.
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// By Chris Brady
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#include <stdint.h>
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#include "cpuid.h"
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#include "cpuinfo.h"
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#include "msr.h"
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#include "pci.h"
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#include "temperature.h"
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//------------------------------------------------------------------------------
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// Public Functions
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//------------------------------------------------------------------------------
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int get_cpu_temperature(void)
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{
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if (imc_type == 0) {
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return 0;
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}
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// Intel CPU
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if (cpuid_info.vendor_id.str[0] == 'G' && cpuid_info.max_cpuid >= 6) {
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if (cpuid_info.dts_pmp & 1) {
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uint32_t msrl, msrh;
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rdmsr(MSR_IA32_THERM_STATUS, msrl, msrh);
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int Tabs = (msrl >> 16) & 0x7F;
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rdmsr(MSR_IA32_TEMPERATURE_TARGET, msrl, msrh);
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int Tjunc = (msrl >> 16) & 0x7F;
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if (Tjunc < 50 || Tjunc > 125) {
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Tjunc = 90;
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}
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return Tjunc - Tabs;
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}
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}
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#if 0 // TODO: This doesn't give accurate results.
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// AMD CPU
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if (cpuid_info.vendor_id.str[0] == 'A' && cpuid_info.version.extendedFamily > 0) {
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uint32_t rtcr;
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pci_conf_read(0, 24, 3, 0xA4, 4, &rtcr);
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int raw_temp = (rtcr >> 21) & 0x7FF;
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return raw_temp / 8;
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}
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#endif
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return 0;
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}
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