mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-09-04 05:21:24 +02:00
d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
105 lines
2.3 KiB
C
105 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* From Coreboot file of the same name
|
|
*
|
|
* Copyright (C) 2011 The Chromium Authors.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <log.h>
|
|
#include <asm/cpu.h>
|
|
#include <asm/global_data.h>
|
|
#include <asm/msr.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/turbo.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#ifdef CONFIG_CPU_INTEL_TURBO_NOT_PACKAGE_SCOPED
|
|
static inline int get_global_turbo_state(void)
|
|
{
|
|
return TURBO_UNKNOWN;
|
|
}
|
|
|
|
static inline void set_global_turbo_state(int state)
|
|
{
|
|
}
|
|
#else
|
|
static inline int get_global_turbo_state(void)
|
|
{
|
|
return gd->arch.turbo_state;
|
|
}
|
|
|
|
static inline void set_global_turbo_state(int state)
|
|
{
|
|
gd->arch.turbo_state = state;
|
|
}
|
|
#endif
|
|
|
|
/* gcc 7.3 does not wwant to drop strings, so use #ifdef */
|
|
#ifndef CONFIG_TPL_BUILD
|
|
static const char *const turbo_state_desc[] = {
|
|
[TURBO_UNKNOWN] = "unknown",
|
|
[TURBO_UNAVAILABLE] = "unavailable",
|
|
[TURBO_DISABLED] = "available but hidden",
|
|
[TURBO_ENABLED] = "available and visible"
|
|
};
|
|
#endif
|
|
|
|
/*
|
|
* Determine the current state of Turbo and cache it for later.
|
|
* Turbo is a package level config so it does not need to be
|
|
* enabled on every core.
|
|
*/
|
|
int turbo_get_state(void)
|
|
{
|
|
struct cpuid_result cpuid_regs;
|
|
int turbo_en, turbo_cap;
|
|
msr_t msr;
|
|
int turbo_state = get_global_turbo_state();
|
|
|
|
/* Return cached state if available */
|
|
if (turbo_state != TURBO_UNKNOWN)
|
|
return turbo_state;
|
|
|
|
cpuid_regs = cpuid(CPUID_LEAF_PM);
|
|
turbo_cap = !!(cpuid_regs.eax & PM_CAP_TURBO_MODE);
|
|
|
|
msr = msr_read(MSR_IA32_MISC_ENABLE);
|
|
turbo_en = !(msr.hi & MISC_DISABLE_TURBO);
|
|
|
|
if (!turbo_cap && turbo_en) {
|
|
/* Unavailable */
|
|
turbo_state = TURBO_UNAVAILABLE;
|
|
} else if (!turbo_cap && !turbo_en) {
|
|
/* Available but disabled */
|
|
turbo_state = TURBO_DISABLED;
|
|
} else if (turbo_cap && turbo_en) {
|
|
/* Available */
|
|
turbo_state = TURBO_ENABLED;
|
|
}
|
|
|
|
set_global_turbo_state(turbo_state);
|
|
#ifndef CONFIG_TPL_BUILD
|
|
debug("Turbo is %s\n", turbo_state_desc[turbo_state]);
|
|
#endif
|
|
return turbo_state;
|
|
}
|
|
|
|
void turbo_enable(void)
|
|
{
|
|
msr_t msr;
|
|
|
|
/* Only possible if turbo is available but hidden */
|
|
if (turbo_get_state() == TURBO_DISABLED) {
|
|
/* Clear Turbo Disable bit in Misc Enables */
|
|
msr = msr_read(MSR_IA32_MISC_ENABLE);
|
|
msr.hi &= ~MISC_DISABLE_TURBO;
|
|
msr_write(MSR_IA32_MISC_ENABLE, msr);
|
|
|
|
/* Update cached turbo state */
|
|
set_global_turbo_state(TURBO_ENABLED);
|
|
debug("Turbo has been enabled\n");
|
|
}
|
|
}
|