This defines the basics of a new boot time measurement feature. This allows
logging of very accurate time measurements as the boot proceeds, by using
an available microsecond counter.
Signed-off-by: Simon Glass <s...@chromium.org>
---
README | 11 ++++++++
common/Makefile | 1 +
common/bootstage.c | 49 +++++++++++++++++++++++++++++++++++
include/bootstage.h | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++
include/common.h | 8 ++++++
5 files changed, 140 insertions(+), 0 deletions(-)
create mode 100644 common/bootstage.c
create mode 100644 include/bootstage.h
diff --git a/README b/README
index 6f3748d..f9e4e65 100644
--- a/README
+++ b/README
@@ -2026,6 +2026,17 @@ The following options need to be configured:
example, some LED's) on your board. At the moment,
the following checkpoints are implemented:
+- Time boot progress
+ CONFIG_BOOTSTAGE
+
+ Define this option to enable microsecond boot stage timing
+ on supported platforms. For this to work your platform
+ needs to define a function timer_get_us() which returns the
+ number of microseconds since reset. This would normally
+ be done in your SOC or board timer.c file.
+
+ You can add calls to bootstage_mark() to set time markers.
+
- Standalone program support:
CONFIG_STANDALONE_LOAD_ADDR
diff --git a/common/Makefile b/common/Makefile
index f81cff9..2c3bc9d 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -174,6 +174,7 @@ COBJS-$(CONFIG_LYNXKDI) += lynxkdi.o
COBJS-$(CONFIG_MODEM_SUPPORT) += modem.o
COBJS-$(CONFIG_UPDATE_TFTP) += update.o
COBJS-$(CONFIG_USB_KEYBOARD) += usb_kbd.o
+COBJS-$(CONFIG_BOOTSTAGE) += bootstage.o
COBJS := $(sort $(COBJS-y))
diff --git a/common/bootstage.c b/common/bootstage.c
new file mode 100644
index 0000000..10f1f34
--- /dev/null
+++ b/common/bootstage.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+
+/*
+ * This module records the progress of boot and arbitrary commands, and
+ * permits accurate timestamping of each.
+ */
+
+#include <common.h>
+
+
+struct bootstage_record {
+ uint32_t time_us;
+ const char *name;
+};
+
+static struct bootstage_record record[BOOTSTAGE_COUNT];
+
+uint32_t bootstage_mark(enum bootstage_id id, const char *name)
+{
+ struct bootstage_record *rec = &record[id];
+
+ /* Only record the first event for each */
+ if (!rec->name) {
+ rec->time_us = (uint32_t)timer_get_us();
+ rec->name = name;
+ }
+ return rec->time_us;
+}
diff --git a/include/bootstage.h b/include/bootstage.h
new file mode 100644
index 0000000..ba656ff
--- /dev/null
+++ b/include/bootstage.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef __BOOTSTAGE_H
+#define __BOOTSTAGE_H
+
+/*
+ * These are the things that can be timestamped. There are some pre-defined
+ * by U-Boot, and some which are user defined.
+ */
+enum bootstage_id {
+ BOOTSTAGE_AWAKE,
+ BOOTSTAGE_START_UBOOT,
+ BOOTSTAGE_USB_START,
+ BOOTSTAGE_ETH_START,
+ BOOTSTAGE_BOOTP_START,
+ BOOTSTAGE_BOOTP_STOP,
+ BOOTSTAGE_KERNELREAD_START,
+ BOOTSTAGE_KERNELREAD_STOP,
+ BOOTSTAGE_BOOTM_START,
+ BOOTSTAGE_BOOTM_HANDOFF,
+
+ /* a few spare for the user, from here */
+ BOOTSTAGE_USER,
+
+ /*
+ * Total number of entries - increase this at the cost of some BSS
+ * and ATAG space.
+ */
+ BOOTSTAGE_COUNT = 10
+};
+
+#ifdef CONFIG_BOOTSTAGE
+
+/**
+ * Mark a time stamp for the current boot stage.
+ *
+ * @param id ID from enum bootstage_id
+ * @param name name for this stage
+ * @returns timestamp in microseconds
+ */
+uint32_t bootstage_mark(enum bootstage_id id, const char *name);
+
+#else
+
+static inline uint32_t bootstage_mark(enum bootstage_id id, const char *name)
+{}
+
+#endif
+
+#endif
+
diff --git a/include/common.h b/include/common.h
index 1e4a6a5..04b0102 100644
--- a/include/common.h
+++ b/include/common.h
@@ -177,6 +177,14 @@ typedef void (interrupt_handler_t)(void *);
#endif /* CONFIG_SERIAL_MULTI */
/*
+ * Return the time since boot in microseconds, This is needed for bootstage
+ * and should be defined in CPU- or board-specific code.
+ */
+unsigned long timer_get_us(void);
+
+#include <bootstage.h>
+
+/*
* General Purpose Utilities
*/
#define min(X, Y) \
--
1.7.3.1
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