mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 18:28:55 +00:00
8b842be10c
Update various drivers to use of_match_ptr() and to avoid including debug strings in TPL. Omit the WiFi driver entirely, since it is not used in TPL. This reduces the TPL binary size by about 608 bytes. Signed-off-by: Simon Glass <sjg@chromium.org>
103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* From Coreboot file of the same name
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*
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* Copyright (C) 2011 The Chromium Authors.
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*/
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#include <common.h>
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#include <log.h>
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#include <asm/cpu.h>
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#include <asm/msr.h>
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#include <asm/processor.h>
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#include <asm/turbo.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef CONFIG_CPU_INTEL_TURBO_NOT_PACKAGE_SCOPED
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static inline int get_global_turbo_state(void)
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{
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return TURBO_UNKNOWN;
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}
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static inline void set_global_turbo_state(int state)
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{
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}
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#else
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static inline int get_global_turbo_state(void)
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{
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return gd->arch.turbo_state;
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}
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static inline void set_global_turbo_state(int state)
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{
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gd->arch.turbo_state = state;
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}
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#endif
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/* gcc 7.3 does not wwant to drop strings, so use #ifdef */
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#ifndef CONFIG_TPL_BUILD
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static const char *const turbo_state_desc[] = {
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[TURBO_UNKNOWN] = "unknown",
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[TURBO_UNAVAILABLE] = "unavailable",
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[TURBO_DISABLED] = "available but hidden",
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[TURBO_ENABLED] = "available and visible"
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};
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#endif
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/*
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* Determine the current state of Turbo and cache it for later.
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* Turbo is a package level config so it does not need to be
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* enabled on every core.
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*/
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int turbo_get_state(void)
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{
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struct cpuid_result cpuid_regs;
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int turbo_en, turbo_cap;
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msr_t msr;
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int turbo_state = get_global_turbo_state();
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/* Return cached state if available */
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if (turbo_state != TURBO_UNKNOWN)
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return turbo_state;
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cpuid_regs = cpuid(CPUID_LEAF_PM);
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turbo_cap = !!(cpuid_regs.eax & PM_CAP_TURBO_MODE);
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msr = msr_read(MSR_IA32_MISC_ENABLE);
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turbo_en = !(msr.hi & MISC_DISABLE_TURBO);
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if (!turbo_cap && turbo_en) {
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/* Unavailable */
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turbo_state = TURBO_UNAVAILABLE;
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} else if (!turbo_cap && !turbo_en) {
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/* Available but disabled */
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turbo_state = TURBO_DISABLED;
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} else if (turbo_cap && turbo_en) {
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/* Available */
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turbo_state = TURBO_ENABLED;
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}
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set_global_turbo_state(turbo_state);
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#ifndef CONFIG_TPL_BUILD
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debug("Turbo is %s\n", turbo_state_desc[turbo_state]);
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#endif
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return turbo_state;
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}
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void turbo_enable(void)
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{
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msr_t msr;
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/* Only possible if turbo is available but hidden */
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if (turbo_get_state() == TURBO_DISABLED) {
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/* Clear Turbo Disable bit in Misc Enables */
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msr = msr_read(MSR_IA32_MISC_ENABLE);
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msr.hi &= ~MISC_DISABLE_TURBO;
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msr_write(MSR_IA32_MISC_ENABLE, msr);
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/* Update cached turbo state */
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set_global_turbo_state(TURBO_ENABLED);
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debug("Turbo has been enabled\n");
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}
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}
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