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authorSimon Glass <sjg@chromium.org>2012-09-28 08:56:37 +0000
committerAnatolij Gustschin <agust@denx.de>2012-10-02 22:39:33 +0200
commit94fd1316b75896b668d22ce846785d92c0340100 (patch)
tree39d8044fa76e189b0247efc2949895689c92542b /common
parent0e9967735869a4e2bbc92d5d0eea0e2136180d49 (diff)
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bootstage: Store boot timings in device tree
Add an option, CONFIG_BOOTSTAGE_FDT to pass boot timings to the kernel in the device tree, if available. To use this, you must have CONFIG_OF_LIBFDT defined. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common')
-rw-r--r--common/bootstage.c95
1 files changed, 89 insertions, 6 deletions
diff --git a/common/bootstage.c b/common/bootstage.c
index e7c3fa8..9ea0128 100644
--- a/common/bootstage.c
+++ b/common/bootstage.c
@@ -124,9 +124,32 @@ static void print_time(unsigned long us_time)
}
}
+/**
+ * Get a record name as a printable string
+ *
+ * @param buf Buffer to put name if needed
+ * @param len Length of buffer
+ * @param rec Boot stage record to get the name from
+ * @return pointer to name, either from the record or pointing to buf.
+ */
+static const char *get_record_name(char *buf, int len,
+ struct bootstage_record *rec)
+{
+ if (rec->name)
+ return rec->name;
+ else if (rec->id >= BOOTSTAGE_ID_USER)
+ snprintf(buf, len, "user_%d", rec->id - BOOTSTAGE_ID_USER);
+ else
+ snprintf(buf, len, "id=%d", rec->id);
+
+ return buf;
+}
+
static uint32_t print_time_record(enum bootstage_id id,
struct bootstage_record *rec, uint32_t prev)
{
+ char buf[20];
+
if (prev == -1U) {
printf("%11s", "");
print_time(rec->time_us);
@@ -134,12 +157,8 @@ static uint32_t print_time_record(enum bootstage_id id,
print_time(rec->time_us);
print_time(rec->time_us - prev);
}
- if (rec->name)
- printf(" %s\n", rec->name);
- else if (id >= BOOTSTAGE_ID_USER)
- printf(" user_%d\n", id - BOOTSTAGE_ID_USER);
- else
- printf(" id=%d\n", id);
+ printf(" %s\n", get_record_name(buf, sizeof(buf), rec));
+
return rec->time_us;
}
@@ -150,6 +169,70 @@ static int h_compare_record(const void *r1, const void *r2)
return rec1->time_us > rec2->time_us ? 1 : -1;
}
+#ifdef CONFIG_OF_LIBFDT
+/**
+ * Add all bootstage timings to a device tree.
+ *
+ * @param blob Device tree blob
+ * @return 0 on success, != 0 on failure.
+ */
+static int add_bootstages_devicetree(struct fdt_header *blob)
+{
+ int bootstage;
+ char buf[20];
+ int id;
+ int i;
+
+ if (!blob)
+ return 0;
+
+ /*
+ * Create the node for bootstage.
+ * The address of flat device tree is set up by the command bootm.
+ */
+ bootstage = fdt_add_subnode(blob, 0, "bootstage");
+ if (bootstage < 0)
+ return -1;
+
+ /*
+ * Insert the timings to the device tree in the reverse order so
+ * that they can be printed in the Linux kernel in the right order.
+ */
+ for (id = BOOTSTAGE_ID_COUNT - 1, i = 0; id >= 0; id--, i++) {
+ struct bootstage_record *rec = &record[id];
+ int node;
+
+ if (id != BOOTSTAGE_ID_AWAKE && rec->time_us == 0)
+ continue;
+
+ node = fdt_add_subnode(blob, bootstage, simple_itoa(i));
+ if (node < 0)
+ break;
+
+ /* add properties to the node. */
+ if (fdt_setprop_string(blob, node, "name",
+ get_record_name(buf, sizeof(buf), rec)))
+ return -1;
+
+ /* Check if this is a 'mark' or 'accum' record */
+ if (fdt_setprop_cell(blob, node,
+ rec->start_us ? "accum" : "mark",
+ rec->time_us))
+ return -1;
+ }
+
+ return 0;
+}
+
+int bootstage_fdt_add_report(void)
+{
+ if (add_bootstages_devicetree(working_fdt))
+ puts("bootstage: Failed to add to device tree\n");
+
+ return 0;
+}
+#endif
+
void bootstage_report(void)
{
struct bootstage_record *rec = record;