[U-Boot] [PATCH 02/15] x86: Enable coreboot timestamp facility support in u-boot.
Simon Glass
sjg at chromium.org
Wed Oct 24 06:04:33 CEST 2012
From: Vadim Bendebury <vbendeb at chromium.org>
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.
Signed-off-by: Vadim Bendebury <vbendeb at chromium.org>
Signed-off-by: Stefan Reinauer <reinauer at chromium.org>
Signed-off-by: Simon Glass <sjg at chromium.org>
---
arch/x86/cpu/coreboot/Makefile | 1 +
arch/x86/cpu/coreboot/coreboot.c | 4 ++
arch/x86/cpu/coreboot/timestamp.c | 61 ++++++++++++++++++++++++
arch/x86/include/asm/arch-coreboot/timestamp.h | 51 ++++++++++++++++++++
4 files changed, 117 insertions(+), 0 deletions(-)
create mode 100644 arch/x86/cpu/coreboot/timestamp.c
create mode 100644 arch/x86/include/asm/arch-coreboot/timestamp.h
diff --git a/arch/x86/cpu/coreboot/Makefile b/arch/x86/cpu/coreboot/Makefile
index 2afd30c..4612a3e 100644
--- a/arch/x86/cpu/coreboot/Makefile
+++ b/arch/x86/cpu/coreboot/Makefile
@@ -37,6 +37,7 @@ COBJS-$(CONFIG_SYS_COREBOOT) += coreboot.o
COBJS-$(CONFIG_SYS_COREBOOT) += tables.o
COBJS-$(CONFIG_SYS_COREBOOT) += ipchecksum.o
COBJS-$(CONFIG_SYS_COREBOOT) += sdram.o
+COBJS-$(CONFIG_SYS_COREBOOT) += timestamp.o
COBJS-$(CONFIG_PCI) += pci.o
SOBJS-$(CONFIG_SYS_COREBOOT) += coreboot_car.o
diff --git a/arch/x86/cpu/coreboot/coreboot.c b/arch/x86/cpu/coreboot/coreboot.c
index 22a643c..b942a3e 100644
--- a/arch/x86/cpu/coreboot/coreboot.c
+++ b/arch/x86/cpu/coreboot/coreboot.c
@@ -28,6 +28,7 @@
#include <netdev.h>
#include <asm/arch-coreboot/tables.h>
#include <asm/arch-coreboot/sysinfo.h>
+#include <asm/arch/timestamp.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -41,6 +42,9 @@ int cpu_init_f(void)
int ret = get_coreboot_info(&lib_sysinfo);
if (ret != 0)
printf("Failed to parse coreboot tables.\n");
+
+ timestamp_init();
+
return ret;
}
diff --git a/arch/x86/cpu/coreboot/timestamp.c b/arch/x86/cpu/coreboot/timestamp.c
new file mode 100644
index 0000000..2ca7a57
--- /dev/null
+++ b/arch/x86/cpu/coreboot/timestamp.c
@@ -0,0 +1,61 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#include <common.h>
+#include <asm/arch/timestamp.h>
+#include <asm/arch/sysinfo.h>
+#include <linux/compiler.h>
+
+struct timestamp_entry {
+ uint32_t entry_id;
+ uint64_t entry_stamp;
+} __packed;
+
+struct timestamp_table {
+ uint64_t base_time;
+ uint32_t max_entries;
+ uint32_t num_entries;
+ struct timestamp_entry entries[0]; /* Variable number of entries */
+} __packed;
+
+static struct timestamp_table *ts_table __attribute__((section(".data")));
+
+void timestamp_init(void)
+{
+ ts_table = lib_sysinfo.tstamp_table;
+ timer_set_tsc_base(ts_table->base_time);
+ timestamp_add_now(TS_U_BOOT_INITTED);
+}
+
+void timestamp_add(enum timestamp_id id, uint64_t ts_time)
+{
+ struct timestamp_entry *tse;
+
+ if (!ts_table || (ts_table->num_entries == ts_table->max_entries))
+ return;
+
+ tse = &ts_table->entries[ts_table->num_entries++];
+ tse->entry_id = id;
+ tse->entry_stamp = ts_time - ts_table->base_time;
+}
+
+void timestamp_add_now(enum timestamp_id id)
+{
+ timestamp_add(id, rdtsc());
+}
diff --git a/arch/x86/include/asm/arch-coreboot/timestamp.h b/arch/x86/include/asm/arch-coreboot/timestamp.h
new file mode 100644
index 0000000..e48ad86
--- /dev/null
+++ b/arch/x86/include/asm/arch-coreboot/timestamp.h
@@ -0,0 +1,51 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#ifndef __COREBOOT_TIMESTAMP_H__
+#define __COREBOOT_TIMESTAMP_H__
+
+enum timestamp_id {
+ /* coreboot specific timestamp IDs */
+ TS_START_ROMSTAGE = 1,
+ TS_BEFORE_INITRAM = 2,
+ TS_AFTER_INITRAM = 3,
+ TS_END_ROMSTAGE = 4,
+ TS_START_COPYRAM = 8,
+ TS_END_COPYRAM = 9,
+ TS_START_RAMSTAGE = 10,
+ TS_DEVICE_ENUMERATE = 30,
+ TS_DEVICE_CONFIGURE = 40,
+ TS_DEVICE_ENABLE = 50,
+ TS_DEVICE_INITIALIZE = 60,
+ TS_DEVICE_DONE = 70,
+ TS_CBMEM_POST = 75,
+ TS_WRITE_TABLES = 80,
+ TS_LOAD_PAYLOAD = 90,
+ TS_ACPI_WAKE_JUMP = 98,
+ TS_SELFBOOT_JUMP = 99,
+
+ /* U-Boot entry IDs start at 1000 */
+ TS_U_BOOT_INITTED = 1000, /* This is where u-boot starts */
+};
+
+void timestamp_init(void);
+void timestamp_add(enum timestamp_id id, uint64_t ts_time);
+void timestamp_add_now(enum timestamp_id id);
+
+#endif
--
1.7.7.3
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