New patch to review for coreboot: 25ab0a1 intel/gm45: Add more debug output to read/write training

[Nico Huber]

Nico Huber ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3257

-gerrit

commit 25ab0a15c516c79df281e6a487ed473ab8483939
Author: Nico Huber 
Date:   Tue May 14 12:28:42 2013 +0200

intel/gm45: Add more debug output to read/write training

This adds debug output for the timing values of the edges found during
    read and write training.

Change-Id: Idb7c84b514716c7265b94890c39b7225de7800dc
    Signed-off-by: Nico Huber 
---
 .../intel/gm45/raminit_read_write_training.c       | 26 +++++++++++++++++-----
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/src/northbridge/intel/gm45/raminit_read_write_training.c b/src/northbridge/intel/gm45/raminit_read_write_training.c
index 0a23901..a4ba4ef 100644
--- a/src/northbridge/intel/gm45/raminit_read_write_training.c
+++ b/src/northbridge/intel/gm45/raminit_read_write_training.c
@@ -56,6 +56,13 @@ typedef struct {
    int t;
    int p;
 } read_timing_t;
+static void print_read_timing(const int msg_lvl, const char *const msg,
+			      const int lane, const int channel,
+			      const read_timing_t *const timing)
+{
+	printk(msg_lvl, "%s for byte lane %d on channel %d: %d.%d\n",
+	       msg, lane, channel, timing->t, timing->p);
+}
 static int normalize_read_timing(read_timing_t *const timing)
 {
    while (timing->p >= READ_TIMING_P_BOUND) {
@@ -182,6 +189,7 @@ static void read_training_per_lane(const int channel, const int lane,
    lower.p = 0;
    if (read_training_find_lower(channel, lane, addresses, &lower) < 0)
    	die("Read training failure: lower bound.\n");
+	print_read_timing(BIOS_SPEW, "Lower bound", lane, channel, &lower);

/*** Search upper bound. ***/

@@ -191,6 +199,7 @@ static void read_training_per_lane(const int channel, const int lane,
    if (read_training_find_upper(channel, lane, addresses, &upper) < 0)
    	/* Overflow on upper edge is not fatal. */
    	printk(BIOS_WARNING, "Read training failure: upper bound.\n");
+	print_read_timing(BIOS_SPEW, "Upper bound", lane, channel, &upper);

/*** Calculate and program mean value. ***/

@@ -201,8 +210,7 @@ static void read_training_per_lane(const int channel, const int lane,
    lower.t = mean_p >> READ_TIMING_P_SHIFT;
    lower.p = mean_p & (READ_TIMING_P_BOUND - 1);
    program_read_timing(channel, lane, &lower);
-	printk(BIOS_DEBUG, "Final timings for byte lane %d on channel %d: "
-			   "%d.%d\n", lane, channel, lower.t, lower.p);
+	print_read_timing(BIOS_DEBUG, "Final timings", lane, channel, &lower);
 }
 static void perform_read_training(const dimminfo_t *const dimms)
 {
@@ -341,6 +349,13 @@ typedef struct {
    const int t_bound;
    int p;
 } write_timing_t;
+static void print_write_timing(const int msg_lvl, const char *const msg,
+			       const int group, const int channel,
+			       const write_timing_t *const timing)
+{
+	printk(msg_lvl, "%s for group %d on channel %d: %d.%d.%d\n",
+	       msg, group, channel, timing->f, timing->t, timing->p);
+}
 static int normalize_write_timing(write_timing_t *const timing)
 {
    while (timing->p >= WRITE_TIMING_P_BOUND) {
@@ -516,6 +531,7 @@ static void write_training_per_group(const int ch, const int group,
    if (write_training_find_lower(ch, group, addresses,
    			      masks, memclk1067, &lower) < 0)
    	die("Write training failure: lower bound.\n");
+	print_write_timing(BIOS_SPEW, "Lower bound", group, ch, &lower);

/*** Search upper bound. ***/

@@ -527,6 +543,7 @@ static void write_training_per_group(const int ch, const int group,
    if (write_training_find_upper(ch, group, addresses,
    			      masks, memclk1067, &upper) < 0)
    	printk(BIOS_WARNING, "Write training failure: upper bound.\n");
+	print_write_timing(BIOS_SPEW, "Upper bound", group, ch, &upper);

/*** Calculate and program mean value. ***/

@@ -540,10 +557,7 @@ static void write_training_per_group(const int ch, const int group,
    lower.t = (mean_p >> WRITE_TIMING_P_SHIFT) % lower.t_bound;
    lower.p = mean_p & (WRITE_TIMING_P_BOUND - 1);
    program_write_timing(ch, group, &lower, memclk1067);
-
-	printk(BIOS_DEBUG, "Final timings for group %d"
-			   " on channel %d: %d.%d.%d\n",
-	       group, ch, lower.f, lower.t, lower.p);
+	print_write_timing(BIOS_DEBUG, "Final timings", group, ch, &lower);
 }
 static void perform_write_training(const int memclk1067,
    			   const dimminfo_t *const dimms)