Enable coreboot timestamp facility support in u-boot.

This change turns on the code which allows u-boot to add
timestamps to the timestamp table created by coreboot.

Since u-boot does not use the tsc_t like structure to represent
HW counter readings, this structure is being replaced by 64 bit
integer.

The timestamp_init() function is now initializing the base timer
value used by u-boot to calculate the HW counter increments.

Timestamp facility is initialized as soon as the timestamp table
pointer is found in the coreboot table. The u-boot generated
timer events' ID will start at 1000 to clearly separate u-boot
events from coreboot events in the timer trace.

BUG=chromium-os:20733
TEST=manual

 A Python script was used to retrieve the CBMEM timestamp table
 while running CromeOS. The script will later be submitted into
 the ChromeOS tools directory.

 The following output was  generated by the script:

 localhost ~ # /var/vbendeb/cbmem.py
 id 1, value 804,824,023
 id 2, value 7,846,816,530
 id 1000, value 19,356,528,758

Change-Id: I48c46e7b5cd2b2601d12465e0d8946152f31126e
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://gerrit.chromium.org/gerrit/8274
Reviewed-by: Stefan Reinauer <reinauer@google.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/board/chromebook-x86/coreboot/coreboot.c b/board/chromebook-x86/coreboot/coreboot.c
index cc47b4f8f15..c1a5e42a6e0 100644
--- a/board/chromebook-x86/coreboot/coreboot.c
+++ b/board/chromebook-x86/coreboot/coreboot.c
@@ -34,6 +34,7 @@
 #include <chromeos/power_management.h>
 #include <chromeos/common.h>
 #include <asm/io.h>
+#include <coreboot/timestamp.h>
 #ifdef CONFIG_HW_WATCHDOG
 #include <watchdog.h>
 #endif
@@ -53,7 +54,7 @@ int cpu_init_f(void)
 		printf("Failed to parse coreboot tables.\n");
 	}
 	gd->blob = lib_sysinfo.sys_fdt;
-
+	timestamp_init();
 	return ret;
 }