diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/usr/diag/prdf/common/plat/pegasus/prdfCenDqBitmap.C | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/src/usr/diag/prdf/common/plat/pegasus/prdfCenDqBitmap.C b/src/usr/diag/prdf/common/plat/pegasus/prdfCenDqBitmap.C index 44cefd2ea..4eb7b6952 100644 --- a/src/usr/diag/prdf/common/plat/pegasus/prdfCenDqBitmap.C +++ b/src/usr/diag/prdf/common/plat/pegasus/prdfCenDqBitmap.C @@ -5,7 +5,9 @@ /* */ /* OpenPOWER HostBoot Project */ /* */ -/* COPYRIGHT International Business Machines Corp. 2013,2014 */ +/* Contributors Listed Below - COPYRIGHT 2013,2014 */ +/* [+] International Business Machines Corp. */ +/* */ /* */ /* Licensed under the Apache License, Version 2.0 (the "License"); */ /* you may not use this file except in compliance with the License. */ @@ -212,18 +214,24 @@ int32_t CenDqBitmap::isChipMark( const CenSymbol & i_symbol, bool & o_cm ) break; } - uint8_t pins = 0xff; + // When PRD marks a DRAM as 'bad', it will set all bits on the DRAM in + // VPD. Due to a bug in DRAM init training, the training procedure will + // change the VPD to 0xee (x8) or 0xe (x4). Therefore, PRD will need to + // compare against the value the procedure sets in order to confirm a + // chip mark has been verified on this DRAM. + + uint8_t pinMsk = 0xee; uint8_t cmData = iv_data[portSlct][byteIdx]; if ( iv_x4Dram ) { - pins = 0xf; // limit to 4 bits + pinMsk = 0xe; // limit to 4 bits uint32_t shift = (DQS_PER_BYTE-1) - bitIdx; shift = (shift / DQS_PER_NIBBLE) * DQS_PER_NIBBLE; // 0,4 cmData = (cmData >> shift) & 0xf; } - o_cm = ( cmData == pins ); + o_cm = ( (cmData & pinMsk) == pinMsk ); } while (0); |
