intel/haswell: Replace monotonic timer

Remove implementation of 24 MHz clock, available only
on Haswell ULT SKUs. Use TSC_MONOTONIC_TIMER instead
for all boards.

Change-Id: Ic4aeb084d1b0913368f5eaa46e1bd68411435517
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34114
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

3 files changed, 1 insertions, 66 deletions

diff --git a/src/cpu/intel/haswell/Kconfig b/src/cpu/intel/haswell/Kconfig
index cb8bc77335..8f91b60953 100644
--- a/src/cpu/intel/haswell/Kconfig
+++ b/src/cpu/intel/haswell/Kconfig
@@ -15,6 +15,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SSE2
 	select UDELAY_TSC
 	select TSC_CONSTANT_RATE
+	select TSC_MONOTONIC_TIMER
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	#select AP_IN_SIPI_WAIT
 	select TSC_SYNC_MFENCE
diff --git a/src/cpu/intel/haswell/Makefile.inc b/src/cpu/intel/haswell/Makefile.inc
index a472da2d5e..f9606486c2 100644
--- a/src/cpu/intel/haswell/Makefile.inc
+++ b/src/cpu/intel/haswell/Makefile.inc
@@ -16,14 +16,6 @@ postcar-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += stage_cache.c
 smm-y += finalize.c
 smm-y += tsc_freq.c
 
-ifneq ($(CONFIG_TSC_MONOTONIC_TIMER),y)
-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
-endif
-
 bootblock-y += ../car/non-evict/cache_as_ram.S
 bootblock-y += ../car/bootblock.c
 bootblock-y += ../../x86/early_reset.S
diff --git a/src/cpu/intel/haswell/monotonic_timer.c b/src/cpu/intel/haswell/monotonic_timer.c
deleted file mode 100644
index 63500a4d26..0000000000
--- a/src/cpu/intel/haswell/monotonic_timer.c
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2013 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>
-
-#define MSR_COUNTER_24_MHz 0x637
-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;
-}