timestamps intel: Move timestamp scratchpad to chipset

This retrieves back the value stored with store_initial_timestamp()
in the bootblock for southbridge.

Change-Id: I377c823706c33ed65af023d20d2e4323edd31199
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3908
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-by: Aaron Durbin <adurbin@google.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/southbridge/intel/lynxpoint/early_pch.c b/src/southbridge/intel/lynxpoint/early_pch.c
index a390d737bc..1a78d571e6 100644
--- a/src/southbridge/intel/lynxpoint/early_pch.c
+++ b/src/southbridge/intel/lynxpoint/early_pch.c
@@ -21,6 +21,7 @@
 #include <console/console.h>
 #include <arch/io.h>
 #include <device/pci_def.h>
+#include <timestamp.h>
 #include <elog.h>
 #include "pch.h"
 
@@ -62,6 +63,17 @@ static void pch_generic_setup(void)
 	printk(BIOS_DEBUG, " done.\n");
 }
 
+#if CONFIG_COLLECT_TIMESTAMPS
+tsc_t get_initial_timestamp(void)
+{
+	tsc_t base_time = {
+		.lo = pci_read_config32(PCI_DEV(0, 0x00, 0), 0xdc),
+		.hi = pci_read_config32(PCI_DEV(0, 0x1f, 2), 0xd0)
+	};
+	return base_time;
+}
+#endif
+
 static int sleep_type_s3(void)
 {
 	u32 pm1_cnt;