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authorPatrick Rudolph <siro@das-labor.org>2017-06-06 10:44:29 +0200
committerMartin Roth <martinroth@google.com>2017-06-09 16:27:19 +0200
commitb9959e279c40b6db50efa61d20838757080fa4dd (patch)
tree2076a6f8bbc9019c555a598d2a3bd5424e3462a0
parent21e7424fc985f2f92ee7e9f505acd72c53035531 (diff)
cpu/intel/model_206ax: Use tsc monotonic timer
Switch from lapic to tsc. Allows timestamps to be used in coreboot, as there's a reference clock available to calculate correct time units. Clean Kconfig, remove duplicated lapic code and include tsc dir for LGA1155 boards. Tested on Lenovo T430. Change-Id: I849ca2b3908116d9d22907039cd6e4464444b1d1 Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/20044 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
-rw-r--r--src/cpu/intel/model_206ax/Kconfig5
-rw-r--r--src/cpu/intel/model_206ax/Makefile.inc4
-rw-r--r--src/cpu/intel/model_206ax/tsc_freq.c27
-rw-r--r--src/cpu/intel/socket_LGA1155/Makefile.inc1
-rw-r--r--src/mainboard/gigabyte/ga-b75m-d3h/Kconfig1
-rw-r--r--src/mainboard/gigabyte/ga-b75m-d3v/Kconfig1
-rw-r--r--src/mainboard/sapphire/pureplatinumh61/Kconfig1
-rw-r--r--src/northbridge/intel/fsp_sandybridge/Makefile.inc1
-rw-r--r--src/northbridge/intel/fsp_sandybridge/udelay.c51
-rw-r--r--src/northbridge/intel/sandybridge/Makefile.inc1
-rw-r--r--src/northbridge/intel/sandybridge/udelay.c71
11 files changed, 35 insertions, 129 deletions
diff --git a/src/cpu/intel/model_206ax/Kconfig b/src/cpu/intel/model_206ax/Kconfig
index 6c04fba829..f16b11962c 100644
--- a/src/cpu/intel/model_206ax/Kconfig
+++ b/src/cpu/intel/model_206ax/Kconfig
@@ -14,12 +14,13 @@ config CPU_SPECIFIC_OPTIONS
select ARCH_RAMSTAGE_X86_32
select SMP
select SSE2
- select UDELAY_LAPIC
+ select UDELAY_TSC
+ select TSC_CONSTANT_RATE
+ select TSC_MONOTONIC_TIMER
select SMM_TSEG
select SUPPORT_CPU_UCODE_IN_CBFS
#select AP_IN_SIPI_WAIT
select TSC_SYNC_MFENCE
- select LAPIC_MONOTONIC_TIMER
select CPU_INTEL_COMMON
config BOOTBLOCK_CPU_INIT
diff --git a/src/cpu/intel/model_206ax/Makefile.inc b/src/cpu/intel/model_206ax/Makefile.inc
index b79ccd71ff..7516e9d246 100644
--- a/src/cpu/intel/model_206ax/Makefile.inc
+++ b/src/cpu/intel/model_206ax/Makefile.inc
@@ -5,6 +5,10 @@ subdirs-y += ../common
ramstage-y += acpi.c
+ramstage-y += tsc_freq.c
+romstage-y += tsc_freq.c
+smm-$(CONFIG_HAVE_SMI_HANDLER) += tsc_freq.c
+
smm-$(CONFIG_HAVE_SMI_HANDLER) += finalize.c
cpu_microcode_bins += 3rdparty/blobs/cpu/intel/model_206ax/microcode.bin
diff --git a/src/cpu/intel/model_206ax/tsc_freq.c b/src/cpu/intel/model_206ax/tsc_freq.c
new file mode 100644
index 0000000000..545ca5f106
--- /dev/null
+++ b/src/cpu/intel/model_206ax/tsc_freq.c
@@ -0,0 +1,27 @@
+/*
+ * 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 <cpu/x86/tsc.h>
+#include "model_206ax.h"
+
+unsigned long tsc_freq_mhz(void)
+{
+ msr_t platform_info;
+
+ platform_info = rdmsr(MSR_PLATFORM_INFO);
+ return SANDYBRIDGE_BCLK * ((platform_info.lo >> 8) & 0xff);
+}
diff --git a/src/cpu/intel/socket_LGA1155/Makefile.inc b/src/cpu/intel/socket_LGA1155/Makefile.inc
index eb7abf065e..539f285d92 100644
--- a/src/cpu/intel/socket_LGA1155/Makefile.inc
+++ b/src/cpu/intel/socket_LGA1155/Makefile.inc
@@ -1,3 +1,4 @@
+subdirs-y += ../../x86/tsc
subdirs-y += ../../x86/mtrr
subdirs-y += ../../x86/lapic
subdirs-y += ../../x86/cache
diff --git a/src/mainboard/gigabyte/ga-b75m-d3h/Kconfig b/src/mainboard/gigabyte/ga-b75m-d3h/Kconfig
index 4b4909a29c..ef66418d55 100644
--- a/src/mainboard/gigabyte/ga-b75m-d3h/Kconfig
+++ b/src/mainboard/gigabyte/ga-b75m-d3h/Kconfig
@@ -15,7 +15,6 @@ config BOARD_SPECIFIC_OPTIONS
select HAVE_ACPI_RESUME
select HAVE_SMI_HANDLER
select INTEL_INT15
- select UDELAY_TSC
select SERIRQ_CONTINUOUS_MODE
select MAINBOARD_HAS_LIBGFXINIT
select MAINBOARD_HAS_LPC_TPM
diff --git a/src/mainboard/gigabyte/ga-b75m-d3v/Kconfig b/src/mainboard/gigabyte/ga-b75m-d3v/Kconfig
index 2be33224fe..8e83deb5c7 100644
--- a/src/mainboard/gigabyte/ga-b75m-d3v/Kconfig
+++ b/src/mainboard/gigabyte/ga-b75m-d3v/Kconfig
@@ -15,7 +15,6 @@ config BOARD_SPECIFIC_OPTIONS
select HAVE_ACPI_RESUME
select HAVE_SMI_HANDLER
select INTEL_INT15
- select UDELAY_TSC
select SERIRQ_CONTINUOUS_MODE
config MMCONF_BASE_ADDRESS
diff --git a/src/mainboard/sapphire/pureplatinumh61/Kconfig b/src/mainboard/sapphire/pureplatinumh61/Kconfig
index 6ade9b5d29..58f7d36bde 100644
--- a/src/mainboard/sapphire/pureplatinumh61/Kconfig
+++ b/src/mainboard/sapphire/pureplatinumh61/Kconfig
@@ -15,7 +15,6 @@ config BOARD_SPECIFIC_OPTIONS
select HAVE_ACPI_RESUME
select MAINBOARD_HAS_LIBGFXINIT
select INTEL_INT15
- select UDELAY_TSC
select SERIRQ_CONTINUOUS_MODE
config HAVE_IFD_BIN
diff --git a/src/northbridge/intel/fsp_sandybridge/Makefile.inc b/src/northbridge/intel/fsp_sandybridge/Makefile.inc
index 2f9c43860e..2a4d9bdf9f 100644
--- a/src/northbridge/intel/fsp_sandybridge/Makefile.inc
+++ b/src/northbridge/intel/fsp_sandybridge/Makefile.inc
@@ -29,7 +29,6 @@ romstage-y += early_init.c
romstage-y += report_platform.c
romstage-y += ../../../arch/x86/walkcbfs.S
-smm-$(CONFIG_HAVE_SMI_HANDLER) += udelay.c
smm-$(CONFIG_HAVE_SMI_HANDLER) += finalize.c
CPPFLAGS_common += -I$(src)/northbridge/intel/fsp_sandybridge/fsp
diff --git a/src/northbridge/intel/fsp_sandybridge/udelay.c b/src/northbridge/intel/fsp_sandybridge/udelay.c
deleted file mode 100644
index 8f95595c12..0000000000
--- a/src/northbridge/intel/fsp_sandybridge/udelay.c
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2007-2008 coresystems GmbH
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <delay.h>
-#include <stdint.h>
-#include <cpu/x86/tsc.h>
-#include <cpu/x86/msr.h>
-
-/**
- * Intel SandyBridge/IvyBridge CPUs always run the TSC at BCLK = 100MHz
- */
-
-void udelay(u32 us)
-{
- u32 dword;
- tsc_t tsc, tsc1, tscd;
- msr_t msr;
- u32 fsb = 100, divisor;
- u32 d; /* ticks per us */
-
- msr = rdmsr(0xce);
- divisor = (msr.lo >> 8) & 0xff;
-
- d = fsb * divisor; /* On Core/Core2 this is divided by 4 */
- multiply_to_tsc(&tscd, us, d);
-
- tsc1 = rdtsc();
- dword = tsc1.lo + tscd.lo;
- if ((dword < tsc1.lo) || (dword < tscd.lo)) {
- tsc1.hi++;
- }
- tsc1.lo = dword;
- tsc1.hi += tscd.hi;
-
- do {
- tsc = rdtsc();
- } while ((tsc.hi < tsc1.hi)
- || ((tsc.hi == tsc1.hi) && (tsc.lo <= tsc1.lo)));
-}
diff --git a/src/northbridge/intel/sandybridge/Makefile.inc b/src/northbridge/intel/sandybridge/Makefile.inc
index a40fa157ef..846d31bd78 100644
--- a/src/northbridge/intel/sandybridge/Makefile.inc
+++ b/src/northbridge/intel/sandybridge/Makefile.inc
@@ -43,7 +43,6 @@ romstage-y += early_init.c
romstage-y += report_platform.c
romstage-y += ../../../arch/x86/walkcbfs.S
-smm-$(CONFIG_HAVE_SMI_HANDLER) += udelay.c
smm-$(CONFIG_HAVE_SMI_HANDLER) += finalize.c
ifneq ($(CONFIG_CHROMEOS),y)
diff --git a/src/northbridge/intel/sandybridge/udelay.c b/src/northbridge/intel/sandybridge/udelay.c
deleted file mode 100644
index 7362f75bcc..0000000000
--- a/src/northbridge/intel/sandybridge/udelay.c
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2007-2008 coresystems GmbH
- *
- * 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 <delay.h>
-#include <stdint.h>
-#include <cpu/x86/tsc.h>
-#include <cpu/x86/msr.h>
-
-/**
- * Intel Sandy Bridge/Ivy Bridge CPUs always run the TSC at BCLK=100MHz
- */
-
-void udelay(u32 us)
-{
- u32 dword;
- tsc_t tsc, tsc1, tscd;
- msr_t msr;
- u32 fsb = 100, divisor;
- u32 d; /* ticks per us */
-
- msr = rdmsr(0xce);
- divisor = (msr.lo >> 8) & 0xff;
-
- d = fsb * divisor; /* On Core/Core2 this is divided by 4 */
- multiply_to_tsc(&tscd, us, d);
-
- tsc1 = rdtsc();
- dword = tsc1.lo + tscd.lo;
- if ((dword < tsc1.lo) || (dword < tscd.lo)) {
- tsc1.hi++;
- }
- tsc1.lo = dword;
- tsc1.hi += tscd.hi;
-
- do {
- tsc = rdtsc();
- } while ((tsc.hi < tsc1.hi)
- || ((tsc.hi == tsc1.hi) && (tsc.lo < tsc1.lo)));
-}
-
-#if CONFIG_LAPIC_MONOTONIC_TIMER && !defined(__PRE_RAM__)
-#include <timer.h>
-
-void timer_monotonic_get(struct mono_time *mt)
-{
- tsc_t tsc;
- msr_t msr;
- u32 fsb = 100, divisor;
- u32 d; /* ticks per us */
-
- msr = rdmsr(0xce);
- divisor = (msr.lo >> 8) & 0xff;
- d = fsb * divisor; /* On Core/Core2 this is divided by 4 */
-
- tsc = rdtsc();
-
- mt->microseconds = (long)((((uint64_t)tsc.hi << 32) | tsc.lo) / d);
-}
-#endif