u-boot/arch/x86/include/asm/turbo.h
Simon Glass 18739e2ccc x86: Add Intel speedstep and turbo mode code
Intel chips have a turbo mode where they can run faster for a short period
until they reach thermal limits. Add code to adjust and query this feature.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-11-25 06:34:02 -07:00

31 lines
528 B
C

/*
* From coreboot file of the same name
*
* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0
*/
#ifndef _ASM_TURBO_H
#define _ASM_TURBO_H
#define CPUID_LEAF_PM 6
#define PM_CAP_TURBO_MODE (1 << 1)
#define MSR_IA32_MISC_ENABLES 0x1a0
#define H_MISC_DISABLE_TURBO (1 << 6)
enum {
TURBO_UNKNOWN,
TURBO_UNAVAILABLE,
TURBO_DISABLED,
TURBO_ENABLED,
};
/* Return current turbo state */
int turbo_get_state(void);
/* Enable turbo */
void turbo_enable(void);
#endif