intel/broadwell: Switch to TSC_MONOTONIC_TIMER

Change-Id: I01b73e20c8af1b00175dc6d9ee56e6b33ac5768d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36537
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

3 files changed, 1 insertions, 64 deletions

diff --git a/src/soc/intel/broadwell/Kconfig b/src/soc/intel/broadwell/Kconfig
index fadbb417ae..0bbb668c98 100644
--- a/src/soc/intel/broadwell/Kconfig
+++ b/src/soc/intel/broadwell/Kconfig
@@ -29,6 +29,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SSE2
 	select TSC_SYNC_MFENCE
 	select UDELAY_TSC
+	select TSC_MONOTONIC_TIMER
 	select SOC_INTEL_COMMON
 	select INTEL_DESCRIPTOR_MODE_CAPABLE
 	select SOC_INTEL_COMMON_ACPI_WAKE_SOURCE
diff --git a/src/soc/intel/broadwell/Makefile.inc b/src/soc/intel/broadwell/Makefile.inc
index 91a3da02c6..055a0049af 100644
--- a/src/soc/intel/broadwell/Makefile.inc
+++ b/src/soc/intel/broadwell/Makefile.inc
@@ -39,11 +39,6 @@ ramstage-y += memmap.c
 romstage-y += memmap.c
 postcar-y += memmap.c
 ramstage-y += minihd.c
-bootblock-y += monotonic_timer.c
-romstage-y += monotonic_timer.c
-postcar-y += monotonic_timer.c
-ramstage-y += monotonic_timer.c
-smm-y      += monotonic_timer.c
 ramstage-y += pch.c
 romstage-y += pch.c
 ramstage-y += pcie.c
diff --git a/src/soc/intel/broadwell/monotonic_timer.c b/src/soc/intel/broadwell/monotonic_timer.c
deleted file mode 100644
index 84eade8a30..0000000000
--- a/src/soc/intel/broadwell/monotonic_timer.c
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2014 Google Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <stdint.h>
-#include <cpu/x86/msr.h>
-#include <timer.h>
-#include <soc/msr.h>
-
-static struct monotonic_counter {
-	int initialized;
-	struct mono_time time;
-	uint32_t last_value;
-} mono_counter;
-
-static inline uint32_t read_counter_msr(void)
-{
-	/* Even though the MSR is 64-bit it is assumed that the hardware
-	 * is polled frequently enough to only use the lower 32-bits. */
-	msr_t counter_msr;
-
-	counter_msr = rdmsr(MSR_COUNTER_24_MHZ);
-
-	return counter_msr.lo;
-}
-
-void timer_monotonic_get(struct mono_time *mt)
-{
-	uint32_t current_tick;
-	uint32_t usecs_elapsed;
-
-	if (!mono_counter.initialized) {
-		mono_counter.last_value = read_counter_msr();
-		mono_counter.initialized = 1;
-	}
-
-	current_tick = read_counter_msr();
-	usecs_elapsed = (current_tick - mono_counter.last_value) / 24;
-
-	/* Update current time and tick values only if a full tick occurred. */
-	if (usecs_elapsed) {
-		mono_time_add_usecs(&mono_counter.time, usecs_elapsed);
-		mono_counter.last_value = current_tick;
-	}
-
-	/* Save result. */
-	*mt = mono_counter.time;
-}