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Diffstat (limited to 'arch/x86/include/asm/cpu_common.h')
-rw-r--r--arch/x86/include/asm/cpu_common.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/x86/include/asm/cpu_common.h b/arch/x86/include/asm/cpu_common.h
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+++ b/arch/x86/include/asm/cpu_common.h
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+/*
+ * Copyright (c) 2016 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef __ASM_CPU_COMMON_H
+#define __ASM_CPU_COMMON_H
+
+#define IA32_PERF_CTL 0x199
+
+/**
+ * cpu_common_init() - Set up common CPU init
+ *
+ * This reports BIST failure, enables the LAPIC, updates microcode, enables
+ * the upper 128-bytes of CROM RAM, probes the northbridge, PCH, LPC and SATA.
+ *
+ * @return 0 if OK, -ve on error
+ */
+int cpu_common_init(void);
+
+/**
+ * cpu_set_flex_ratio_to_tdp_nominal() - Set up the maximum non-turbo rate
+ *
+ * If a change is needed, this function will do a soft reset so it takes
+ * effect.
+ *
+ * Some details are available here:
+ * http://forum.hwbot.org/showthread.php?t=76092
+ *
+ * @return 0 if OK, -ve on error
+ */
+int cpu_set_flex_ratio_to_tdp_nominal(void);
+
+#endif