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nb/amd/amdmct/mct_ddr3: Use StopOnError to decrease training time

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There is no need to continue testing a DCT configuration after
data errors have already been detected; this just wastes time
during boot.

Change-Id: I979e27c32a3e0b101590fba0de3d7a25d6fc44d2
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: https://review.coreboot.org/12066
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Timothy Pearson 2015-09-03 18:59:53 -05:00 committed by Martin Roth
parent 9586dc72db
commit 309303884c
2 changed files with 64 additions and 24 deletions
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84
src/northbridge/amd/amdmct/mct_ddr3/mctdqs_d.c
View file

@ -1117,7 +1117,7 @@ static void stop_dram_dqs_training_pattern_fam15(struct MCTStatStruc *pMCTstat,
}
static void read_dram_dqs_training_pattern_fam15(struct MCTStatStruc *pMCTstat,
struct DCTStatStruc *pDCTstat, uint8_t dct, uint8_t Receiver, uint8_t lane)
struct DCTStatStruc *pDCTstat, uint8_t dct, uint8_t Receiver, uint8_t lane, uint8_t stop_on_error)
{
uint32_t dword;
uint32_t dev = pDCTstat->dev_dct;
@ -1129,24 +1129,35 @@ static void read_dram_dqs_training_pattern_fam15(struct MCTStatStruc *pMCTstat,
if (lane < 4) {
Set_NB32_DCT(dev, dct, 0x274, ~(0xff << (lane * 8)));
Set_NB32_DCT(dev, dct, 0x278, ~0x0);
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword |= 0xff; /* EccMask = 0xff */
Set_NB32_DCT(dev, dct, 0x27c, dword);
} else if (lane < 8) {
Set_NB32_DCT(dev, dct, 0x274, ~0x0);
Set_NB32_DCT(dev, dct, 0x278, ~(0xff << (lane * 8)));
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword |= 0xff; /* EccMask = 0xff */
Set_NB32_DCT(dev, dct, 0x27c, dword);
} else if (lane == 8) {
Set_NB32_DCT(dev, dct, 0x274, ~0x0);
Set_NB32_DCT(dev, dct, 0x278, ~0x0);
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword &= ~(0xff); /* EccMask = 0x0 */
Set_NB32_DCT(dev, dct, 0x27c, dword);
} else if (lane == 0xff) {
Set_NB32_DCT(dev, dct, 0x274, ~0xffffffff);
Set_NB32_DCT(dev, dct, 0x278, ~0xffffffff);
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword &= ~(0xff); /* EccMask = 0x0 */
Set_NB32_DCT(dev, dct, 0x27c, dword);
} else {
Set_NB32_DCT(dev, dct, 0x274, ~0x0);
Set_NB32_DCT(dev, dct, 0x278, ~0x0);
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword |= 0xff; /* EccMask = 0xff */
Set_NB32_DCT(dev, dct, 0x27c, dword);
}
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword &= ~(0xff); /* EccMask = 0 */
if (lane != 0xff)
if ((lane != 8) || (pDCTstat->DimmECCPresent == 0))
dword |= 0xff; /* EccMask = 0xff */
Set_NB32_DCT(dev, dct, 0x27c, dword);
dword = Get_NB32_DCT(dev, dct, 0x270);
dword &= ~(0x7ffff); /* DataPrbsSeed = 55555 */
// dword |= (0x55555);
@ -1178,7 +1189,8 @@ static void read_dram_dqs_training_pattern_fam15(struct MCTStatStruc *pMCTstat,
dword = Get_NB32_DCT(dev, dct, 0x250);
dword |= (0x1 << 3); /* ResetAllErr = 1 */
dword &= ~(0x1 << 4); /* StopOnErr = 0 */
dword &= ~(0x1 << 4); /* StopOnErr = stop_on_error */
dword |= (stop_on_error & 0x1) << 4;
dword &= ~(0x3 << 8); /* CmdTgt = 1 (Alternate between Target A and Target B) */
dword |= (0x1 << 8);
dword &= ~(0x7 << 5); /* CmdType = 0 (Read) */
@ -1198,7 +1210,7 @@ static void read_dram_dqs_training_pattern_fam15(struct MCTStatStruc *pMCTstat,
}
static void write_dram_dqs_training_pattern_fam15(struct MCTStatStruc *pMCTstat,
struct DCTStatStruc *pDCTstat, uint8_t dct, uint8_t Receiver, uint8_t lane)
struct DCTStatStruc *pDCTstat, uint8_t dct, uint8_t Receiver, uint8_t lane, uint8_t stop_on_error)
{
uint32_t dword;
uint32_t dev = pDCTstat->dev_dct;
@ -1210,24 +1222,35 @@ static void write_dram_dqs_training_pattern_fam15(struct MCTStatStruc *pMCTstat,
if (lane < 4) {
Set_NB32_DCT(dev, dct, 0x274, ~(0xff << (lane * 8)));
Set_NB32_DCT(dev, dct, 0x278, ~0x0);
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword |= 0xff; /* EccMask = 0xff */
Set_NB32_DCT(dev, dct, 0x27c, dword);
} else if (lane < 8) {
Set_NB32_DCT(dev, dct, 0x274, ~0x0);
Set_NB32_DCT(dev, dct, 0x278, ~(0xff << (lane * 8)));
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword |= 0xff; /* EccMask = 0xff */
Set_NB32_DCT(dev, dct, 0x27c, dword);
} else if (lane == 8) {
Set_NB32_DCT(dev, dct, 0x274, ~0x0);
Set_NB32_DCT(dev, dct, 0x278, ~0x0);
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword &= ~(0xff); /* EccMask = 0x0 */
Set_NB32_DCT(dev, dct, 0x27c, dword);
} else if (lane == 0xff) {
Set_NB32_DCT(dev, dct, 0x274, ~0xffffffff);
Set_NB32_DCT(dev, dct, 0x278, ~0xffffffff);
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword &= ~(0xff); /* EccMask = 0x0 */
Set_NB32_DCT(dev, dct, 0x27c, dword);
} else {
Set_NB32_DCT(dev, dct, 0x274, ~0x0);
Set_NB32_DCT(dev, dct, 0x278, ~0x0);
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword |= 0xff; /* EccMask = 0xff */
Set_NB32_DCT(dev, dct, 0x27c, dword);
}
dword = Get_NB32_DCT(dev, dct, 0x27c);
dword &= ~(0xff); /* EccMask = 0 */
if (lane != 0xff)
if ((lane != 8) || (pDCTstat->DimmECCPresent == 0))
dword |= 0xff; /* EccMask = 0xff */
Set_NB32_DCT(dev, dct, 0x27c, dword);
dword = Get_NB32_DCT(dev, dct, 0x270);
dword &= ~(0x7ffff); /* DataPrbsSeed = 55555 */
// dword |= (0x55555);
@ -1259,7 +1282,8 @@ static void write_dram_dqs_training_pattern_fam15(struct MCTStatStruc *pMCTstat,
dword = Get_NB32_DCT(dev, dct, 0x250);
dword |= (0x1 << 3); /* ResetAllErr = 1 */
dword &= ~(0x1 << 4); /* StopOnErr = 0 */
dword &= ~(0x1 << 4); /* StopOnErr = stop_on_error */
dword |= (stop_on_error & 0x1) << 4;
dword &= ~(0x3 << 8); /* CmdTgt = 1 (Alternate between Target A and Target B) */
dword |= (0x1 << 8);
dword &= ~(0x7 << 5); /* CmdType = 1 (Write) */
@ -1293,6 +1317,7 @@ static uint8_t TrainDQSRdWrPos_D_Fam15(struct MCTStatStruc *pMCTstat,
uint8_t dual_rank;
uint8_t write_iter;
uint8_t read_iter;
uint8_t check_antiphase;
uint16_t initial_write_dqs_delay[MAX_BYTE_LANES];
uint16_t initial_read_dqs_delay[MAX_BYTE_LANES];
uint16_t initial_write_data_timing[MAX_BYTE_LANES];
@ -1374,7 +1399,7 @@ static uint8_t TrainDQSRdWrPos_D_Fam15(struct MCTStatStruc *pMCTstat,
/* 2.10.5.8.4 (2 B)
* Write the DRAM training pattern to the test address
*/
write_dram_dqs_training_pattern_fam15(pMCTstat, pDCTstat, dct, Receiver, lane);
write_dram_dqs_training_pattern_fam15(pMCTstat, pDCTstat, dct, Receiver, lane, 0);
/* Read current settings of other (previously trained) lanes */
read_dqs_read_data_timing_registers(current_read_dqs_delay, dev, dct, dimm, index_reg);
@ -1385,6 +1410,12 @@ static uint8_t TrainDQSRdWrPos_D_Fam15(struct MCTStatStruc *pMCTstat,
for (current_read_dqs_delay[lane] = 0; current_read_dqs_delay[lane] < 0x40; current_read_dqs_delay[lane] += 2) {
print_debug_dqs("\t\t\t\t\tTrainDQSRdWrPos: 161 current_read_dqs_delay[lane] ", current_read_dqs_delay[lane], 6);
if ((current_read_dqs_delay[lane] >> 1) >= (32 - 16)) {
check_antiphase = 1;
} else {
check_antiphase = 0;
}
/* 2.10.5.8.4 (2 A i)
* Commit the current Read DQS Timing Control settings to the hardware registers
*/
@ -1393,7 +1424,16 @@ static uint8_t TrainDQSRdWrPos_D_Fam15(struct MCTStatStruc *pMCTstat,
/* 2.10.5.8.4 (2 A ii)
* Read the DRAM training pattern from the test address
*/
read_dram_dqs_training_pattern_fam15(pMCTstat, pDCTstat, dct, Receiver, lane);
read_dram_dqs_training_pattern_fam15(pMCTstat, pDCTstat, dct, Receiver, lane, ((check_antiphase == 0)?1:0));
if (check_antiphase == 0) {
/* Check for early abort before analyzing per-nibble status */
dword = Get_NB32_DCT(dev, dct, 0x264) & 0x1ffffff;
if (dword != 0) {
dqs_results_array[Receiver & 0x1][lane - lane_start][current_write_data_delay[lane] - initial_write_dqs_delay[lane]][(current_read_dqs_delay[lane] >> 1) + 16] = 0; /* Fail */
continue;
}
}
/* 2.10.5.8.4 (2 A iii)
* Record pass / fail status
@ -1403,7 +1443,7 @@ static uint8_t TrainDQSRdWrPos_D_Fam15(struct MCTStatStruc *pMCTstat,
dqs_results_array[Receiver & 0x1][lane - lane_start][current_write_data_delay[lane] - initial_write_dqs_delay[lane]][(current_read_dqs_delay[lane] >> 1) + 16] = 0; /* Fail */
else
dqs_results_array[Receiver & 0x1][lane - lane_start][current_write_data_delay[lane] - initial_write_dqs_delay[lane]][(current_read_dqs_delay[lane] >> 1) + 16] = 1; /* Pass */
if ((current_read_dqs_delay[lane] >> 1) >= (32 - 16)) {
if (check_antiphase == 1) {
/* Check antiphase results */
dword = Get_NB32_DCT(dev, dct, 0x26c) & 0x3ffff;
if (dword & (0x3 << (lane * 2)))
@ -1626,7 +1666,7 @@ static void TrainDQSReceiverEnCyc_D_Fam15(struct MCTStatStruc *pMCTstat,
uint16_t current_phy_phase_delay[MAX_BYTE_LANES];
uint8_t dqs_results_array[1024];
uint16_t ren_step = 0x40;
uint16_t ren_step = 0x40;
uint32_t index_reg = 0x98;
uint32_t dev = pDCTstat->dev_dct;

4
src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c
View file

@ -1610,14 +1610,14 @@ static void dqsTrainMaxRdLatency_SW_Fam15(struct MCTStatStruc *pMCTstat,
/* 2.10.5.8.5.1.[2,3]
* Write the DRAM training pattern to the test address
*/
write_dram_dqs_training_pattern_fam15(pMCTstat, pDCTstat, Channel, current_worst_case_total_delay_dimm << 1, 0xff);
write_dram_dqs_training_pattern_fam15(pMCTstat, pDCTstat, Channel, current_worst_case_total_delay_dimm << 1, 0xff, 0);
/* 2.10.5.8.5.1.4
* Incrementally test each MaxRdLatency candidate
*/
for (; pDCTstat->CH_MaxRdLat[Channel] < 0x3ff; pDCTstat->CH_MaxRdLat[Channel]++) {
write_max_read_latency_to_registers(pMCTstat, pDCTstat, Channel, pDCTstat->CH_MaxRdLat[Channel]);
read_dram_dqs_training_pattern_fam15(pMCTstat, pDCTstat, Channel, current_worst_case_total_delay_dimm << 1, 0xff);
read_dram_dqs_training_pattern_fam15(pMCTstat, pDCTstat, Channel, current_worst_case_total_delay_dimm << 1, 0xff, 0);
dword = Get_NB32_DCT(dev, Channel, 0x268) & 0x3ffff;
if (!dword)
break;