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From 0609ebe6ead8e3024e9ceeba7b46817ff6fc47a8 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineeringinc.com>
Date: Thu, 11 Jun 2015 16:14:15 -0500
Subject: [PATCH 055/143] src/northbridge/amd/amdmct: Add option to override
bad SPD checksum
Change-Id: Ia743a13348d0a6e5e4dfffa04ed9582e0f7f3dad
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
---
src/mainboard/asus/kgpe-d16/cmos.default | 1 +
src/mainboard/asus/kgpe-d16/cmos.layout | 6 +++++-
src/northbridge/amd/amdmct/mct_ddr3/mct_d.c | 5 +++--
src/northbridge/amd/amdmct/wrappers/mcti_d.c | 8 ++++++++
4 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/src/mainboard/asus/kgpe-d16/cmos.default b/src/mainboard/asus/kgpe-d16/cmos.default
index a52b7fa..73f2a38 100644
--- a/src/mainboard/asus/kgpe-d16/cmos.default
+++ b/src/mainboard/asus/kgpe-d16/cmos.default
@@ -8,6 +8,7 @@ nmi = Disable
hypertransport_speed_limit = Auto
max_mem_clock = DDR3-1600
minimum_memory_voltage = 1.5V
+dimm_spd_checksum = Enforce
ECC_memory = Enable
ECC_redirection = Enable
ecc_scrub_rate = 1.28us
diff --git a/src/mainboard/asus/kgpe-d16/cmos.layout b/src/mainboard/asus/kgpe-d16/cmos.layout
index 307bddc..068eaf4 100644
--- a/src/mainboard/asus/kgpe-d16/cmos.layout
+++ b/src/mainboard/asus/kgpe-d16/cmos.layout
@@ -47,7 +47,8 @@ entries
466 1 e 1 cpu_cc6_state
467 1 e 1 sata_ahci_mode
468 4 h 0 maximum_p_state_limit
-473 1 r 0 allow_spd_nvram_cache_restore
+472 2 e 13 dimm_spd_checksum
+474 1 r 0 allow_spd_nvram_cache_restore
477 1 e 1 ieee1394
728 256 h 0 user_data
984 16 h 0 check_sum
@@ -142,6 +143,9 @@ enumerations
12 1 1.35V
12 2 1.25V
12 3 1.15V
+13 0 Enforce
+13 1 Ignore
+13 2 Override
checksums
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c
index 4d7e5aa..f4859d0 100644
--- a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c
+++ b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c
@@ -1449,7 +1449,7 @@ restartinit:
}
}
if (NodesWmem == 0) {
- printk(BIOS_DEBUG, "No Nodes?!\n");
+ printk(BIOS_ALERT, "Unable to detect valid memory on any nodes. Halting!\n");
goto fatalexit;
}
@@ -3884,13 +3884,14 @@ static u8 DIMMPresence_D(struct MCTStatStruc *pMCTstat,
read_spd_bytes(pMCTstat, pDCTstat, i);
crc_status = crcCheck(pDCTstat, i);
}
- if (crc_status) { /* CRC is OK */
+ if ((crc_status) || (SPDCtrl == 2)) { /* CRC is OK */
byte = pDCTstat->spd_data.spd_bytes[i][SPD_TYPE];
if (byte == JED_DDR3SDRAM) {
/*Dimm is 'Present'*/
pDCTstat->DIMMValid |= 1 << i;
}
} else {
+ printk(BIOS_WARNING, "Node %d DIMM %d: SPD checksum invalid\n", pDCTstat->Node_ID, i);
pDCTstat->DIMMSPDCSE = 1 << i;
if (SPDCtrl == 0) {
pDCTstat->ErrStatus |= 1 << SB_DIMMChkSum;
diff --git a/src/northbridge/amd/amdmct/wrappers/mcti_d.c b/src/northbridge/amd/amdmct/wrappers/mcti_d.c
index 5ca8eac..3053d58 100644
--- a/src/northbridge/amd/amdmct/wrappers/mcti_d.c
+++ b/src/northbridge/amd/amdmct/wrappers/mcti_d.c
@@ -150,6 +150,14 @@ static u16 mctGet_NVbits(u8 index)
case NV_SPDCHK_RESTRT:
val = 0; /* Exit current node initialization if any DIMM has SPD checksum error */
//val = 1; /* Ignore faulty SPD checksum (DIMM will still be disabled), continue current node intialization */
+ //val = 2; /* Override faulty SPD checksum (DIMM will be enabled), continue current node intialization */
+
+ if (get_option(&nvram, "dimm_spd_checksum") == CB_SUCCESS)
+ val = nvram & 0x3;
+
+ if (val > 2)
+ val = 2;
+
break;
case NV_DQSTrainCTL:
//val = 0; /*Skip dqs training */
--
1.7.9.5
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