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-rw-r--r--src/boot/hardwaremain.c34
-rw-r--r--src/include/timestamp.h4
-rw-r--r--src/lib/timestamp.c43
3 files changed, 55 insertions, 26 deletions
diff --git a/src/boot/hardwaremain.c b/src/boot/hardwaremain.c
index b08fe79d0a..c90742e190 100644
--- a/src/boot/hardwaremain.c
+++ b/src/boot/hardwaremain.c
@@ -58,10 +58,8 @@ void hardwaremain(int boot_complete);
void hardwaremain(int boot_complete)
{
struct lb_memory *lb_mem;
-#if CONFIG_COLLECT_TIMESTAMPS
- tsc_t timestamps[6];
- timestamps[0] = rdtsc();
-#endif
+
+ timestamp_stash(TS_START_RAMSTAGE);
post_code(POST_ENTRY_RAMSTAGE);
/* console_init() MUST PRECEDE ALL printk()! */
@@ -83,37 +81,27 @@ void hardwaremain(int boot_complete)
/* FIXME: Is there a better way to handle this? */
init_timer();
-#if CONFIG_COLLECT_TIMESTAMPS
- timestamps[1] = rdtsc();
-#endif
+ timestamp_stash(TS_DEVICE_ENUMERATE);
/* Find the devices we don't have hard coded knowledge about. */
dev_enumerate();
post_code(POST_DEVICE_ENUMERATION_COMPLETE);
-#if CONFIG_COLLECT_TIMESTAMPS
- timestamps[2] = rdtsc();
-#endif
+ timestamp_stash(TS_DEVICE_CONFIGURE);
/* Now compute and assign the bus resources. */
dev_configure();
post_code(POST_DEVICE_CONFIGURATION_COMPLETE);
-#if CONFIG_COLLECT_TIMESTAMPS
- timestamps[3] = rdtsc();
-#endif
+ timestamp_stash(TS_DEVICE_ENABLE);
/* Now actually enable devices on the bus */
dev_enable();
post_code(POST_DEVICES_ENABLED);
-#if CONFIG_COLLECT_TIMESTAMPS
- timestamps[4] = rdtsc();
-#endif
+ timestamp_stash(TS_DEVICE_INITIALIZE);
/* And of course initialize devices on the bus */
dev_initialize();
post_code(POST_DEVICES_INITIALIZED);
-#if CONFIG_COLLECT_TIMESTAMPS
- timestamps[5] = rdtsc();
-#endif
+ timestamp_stash(TS_DEVICE_DONE);
#if CONFIG_WRITE_HIGH_TABLES
cbmem_initialize();
@@ -121,13 +109,7 @@ void hardwaremain(int boot_complete)
cbmemc_reinit();
#endif
#endif
-
- timestamp_add(TS_START_RAMSTAGE, timestamps[0]);
- timestamp_add(TS_DEVICE_ENUMERATE, timestamps[1]);
- timestamp_add(TS_DEVICE_CONFIGURE, timestamps[2]);
- timestamp_add(TS_DEVICE_ENABLE, timestamps[3]);
- timestamp_add(TS_DEVICE_INITIALIZE, timestamps[4]);
- timestamp_add(TS_DEVICE_DONE, timestamps[5]);
+ timestamp_sync();
#if CONFIG_HAVE_ACPI_RESUME
suspend_resume();
diff --git a/src/include/timestamp.h b/src/include/timestamp.h
index 8bf5287c69..e76716c608 100644
--- a/src/include/timestamp.h
+++ b/src/include/timestamp.h
@@ -57,10 +57,14 @@ enum timestamp_id {
void timestamp_init(tsc_t base);
void timestamp_add(enum timestamp_id id, tsc_t ts_time);
void timestamp_add_now(enum timestamp_id id);
+void timestamp_stash(enum timestamp_id id);
+void timestamp_sync(void);
#else
#define timestamp_init(base)
#define timestamp_add(id, time)
#define timestamp_add_now(id)
+#define timestamp_stash(id)
+#define timestamp_sync()
#endif
#endif
diff --git a/src/lib/timestamp.c b/src/lib/timestamp.c
index bbb8197dca..2161d445db 100644
--- a/src/lib/timestamp.c
+++ b/src/lib/timestamp.c
@@ -21,6 +21,10 @@
#include <console/console.h>
#include <cbmem.h>
#include <timestamp.h>
+#ifndef __PRE_RAM__
+/* For CAR_GLOBAL... This should move out of x86 specific code */
+#include <cpu/x86/car.h>
+#endif
#define MAX_TIMESTAMPS 30
@@ -72,3 +76,42 @@ void timestamp_add_now(enum timestamp_id id)
{
timestamp_add(id, rdtsc());
}
+
+#ifndef __PRE_RAM__
+
+#define MAX_TIMESTAMP_CACHE 8
+struct timestamp_cache {
+ enum timestamp_id id;
+ tsc_t time;
+} timestamp_cache[MAX_TIMESTAMP_CACHE] CAR_GLOBAL;
+
+static int timestamp_entries CAR_GLOBAL = 0;
+
+/**
+ * timestamp_stash() allows to temporarily cache time stamps.
+ * This is needed when time stamping before the CBMEM area
+ * is initialized. The function timestamp_sync() is used to
+ * write the time stamps to the CBMEM area. This is done in
+ * hardwaremain()
+ */
+
+void timestamp_stash(enum timestamp_id id)
+{
+ if (timestamp_entries >= MAX_TIMESTAMP_CACHE) {
+ printk(BIOS_ERR, "ERROR: failed to add timestamp to cache\n");
+ return;
+ }
+ timestamp_cache[timestamp_entries].id = id;
+ timestamp_cache[timestamp_entries].time = rdtsc();
+ timestamp_entries++;
+}
+
+void timestamp_sync(void)
+{
+ int i;
+ for (i = 0; i < timestamp_entries; i++)
+ timestamp_add(timestamp_cache[i].id, timestamp_cache[i].time);
+ timestamp_entries = 0;
+}
+
+#endif