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authorKyösti Mälkki <kyosti.malkki@gmail.com>2013-09-07 17:26:08 +0300
committerKyösti Mälkki <kyosti.malkki@gmail.com>2013-09-21 06:20:21 +0200
commitb766b1c76aa2258bf66569f429fb092c23813bbc (patch)
treecd99bf9bfd750768cc6c447ca8e96ede84da7430 /src/lib
parente28bd4ade6f716024afdff0bac48028a42a62e71 (diff)
downloadcoreboot-b766b1c76aa2258bf66569f429fb092c23813bbc.tar.xz
timestamps: Use stash before CBMEM is usable
Change-Id: I9e927abdb1d7d9c233de5620a9a65b419e803ebf Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/3909 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Aaron Durbin <adurbin@google.com>
Diffstat (limited to 'src/lib')
-rw-r--r--src/lib/hardwaremain.c15
-rw-r--r--src/lib/timestamp.c62
2 files changed, 52 insertions, 25 deletions
diff --git a/src/lib/hardwaremain.c b/src/lib/hardwaremain.c
index 898e91048b..dd9719642e 100644
--- a/src/lib/hardwaremain.c
+++ b/src/lib/hardwaremain.c
@@ -126,7 +126,7 @@ static boot_state_t bs_pre_device(void *arg)
static boot_state_t bs_dev_init_chips(void *arg)
{
- timestamp_stash(TS_DEVICE_ENUMERATE);
+ timestamp_add_now(TS_DEVICE_ENUMERATE);
/* Initialize chips early, they might disable unused devices. */
dev_initialize_chips();
@@ -145,7 +145,7 @@ static boot_state_t bs_dev_enumerate(void *arg)
static boot_state_t bs_dev_resources(void *arg)
{
- timestamp_stash(TS_DEVICE_CONFIGURE);
+ timestamp_add_now(TS_DEVICE_CONFIGURE);
/* Now compute and assign the bus resources. */
dev_configure();
post_code(POST_DEVICE_CONFIGURATION_COMPLETE);
@@ -155,7 +155,7 @@ static boot_state_t bs_dev_resources(void *arg)
static boot_state_t bs_dev_enable(void *arg)
{
- timestamp_stash(TS_DEVICE_ENABLE);
+ timestamp_add_now(TS_DEVICE_ENABLE);
/* Now actually enable devices on the bus */
dev_enable();
post_code(POST_DEVICES_ENABLED);
@@ -165,7 +165,7 @@ static boot_state_t bs_dev_enable(void *arg)
static boot_state_t bs_dev_init(void *arg)
{
- timestamp_stash(TS_DEVICE_INITIALIZE);
+ timestamp_add_now(TS_DEVICE_INITIALIZE);
/* And of course initialize devices on the bus */
dev_initialize();
post_code(POST_DEVICES_INITIALIZED);
@@ -175,7 +175,7 @@ static boot_state_t bs_dev_init(void *arg)
static boot_state_t bs_post_device(void *arg)
{
- timestamp_stash(TS_DEVICE_DONE);
+ timestamp_add_now(TS_DEVICE_DONE);
timestamp_sync();
@@ -446,7 +446,10 @@ static void boot_state_schedule_static_entries(void)
void main(void)
{
- timestamp_stash(TS_START_RAMSTAGE);
+ /* Record current time, try to locate timestamps in CBMEM. */
+ timestamp_init(rdtsc());
+
+ timestamp_add_now(TS_START_RAMSTAGE);
post_code(POST_ENTRY_RAMSTAGE);
/* console_init() MUST PRECEDE ALL printk()! */
diff --git a/src/lib/timestamp.c b/src/lib/timestamp.c
index 3f8a7bd621..7e2f7011e6 100644
--- a/src/lib/timestamp.c
+++ b/src/lib/timestamp.c
@@ -17,27 +17,26 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*/
+#include <stddef.h>
#include <stdint.h>
#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
-#ifndef __PRE_RAM__
-static struct timestamp_table* ts_table;
-#endif
+static struct timestamp_table* ts_table CAR_GLOBAL = NULL;
+static tsc_t ts_basetime CAR_GLOBAL = { .lo = 0, .hi =0 };
+
+static void timestamp_stash(enum timestamp_id id, tsc_t ts_time);
static uint64_t tsc_to_uint64(tsc_t tstamp)
{
return (((uint64_t)tstamp.hi) << 32) + tstamp.lo;
}
-void timestamp_init(tsc_t base)
+static void timestamp_real_init(tsc_t base)
{
struct timestamp_table* tst;
@@ -53,18 +52,19 @@ void timestamp_init(tsc_t base)
tst->base_time = tsc_to_uint64(base);
tst->max_entries = MAX_TIMESTAMPS;
tst->num_entries = 0;
+
+ ts_table = tst;
}
void timestamp_add(enum timestamp_id id, tsc_t ts_time)
{
struct timestamp_entry *tse;
-#ifdef __PRE_RAM__
- struct timestamp_table *ts_table = cbmem_find(CBMEM_ID_TIMESTAMP);
-#else
- if (!ts_table)
- ts_table = cbmem_find(CBMEM_ID_TIMESTAMP);
-#endif
- if (!ts_table || (ts_table->num_entries == ts_table->max_entries))
+
+ if (!ts_table) {
+ timestamp_stash(id, ts_time);
+ return;
+ }
+ if (ts_table->num_entries == ts_table->max_entries)
return;
tse = &ts_table->entries[ts_table->num_entries++];
@@ -77,8 +77,6 @@ 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;
@@ -95,18 +93,18 @@ static int timestamp_entries CAR_GLOBAL = 0;
* ram stage main()
*/
-void timestamp_stash(enum timestamp_id id)
+static void timestamp_stash(enum timestamp_id id, tsc_t ts_time)
{
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_cache[timestamp_entries].time = ts_time;
timestamp_entries++;
}
-void timestamp_sync(void)
+static void timestamp_do_sync(void)
{
int i;
for (i = 0; i < timestamp_entries; i++)
@@ -114,4 +112,30 @@ void timestamp_sync(void)
timestamp_entries = 0;
}
+void timestamp_init(tsc_t base)
+{
+#ifndef __PRE_RAM__
+ struct timestamp_table* tst;
+
+ /* Locate and use an already existing table. */
+ tst = cbmem_find(CBMEM_ID_TIMESTAMP);
+ if (tst) {
+ ts_table = tst;
+ return;
+ }
+#endif
+
+ timestamp_real_init(base);
+ if (ts_table)
+ timestamp_do_sync();
+ else
+ ts_basetime = base;
+}
+
+#ifndef __PRE_RAM__
+void timestamp_sync(void)
+{
+ if (!ts_table)
+ timestamp_init(ts_basetime);
+}
#endif