Specifications

System Registers 7-55
Table 7-26 TLEPAERR Register Bit Definitions
Name Bit(s) Type Function
RSVD
NO_ACK
CSR_WR_NXM
WSPC_RD_PEND
IBOXTO
WSPC_RD_ERR
SYSFAULT
SYSDERR
D2ACPE
DTSPE
DTDPE
<31:18>
<17:16>
<15>
<14:13>
<12:11>
<10:9>
<8>
<7>
<6>
<5>
<4>
R/W, 0
W1C, 0
R, 0
R, 0
W1C, 0
W1C, 0
W1C, 0
W1C, 0
W1C, 0
W1C, 0
W1C, 0
Reserved. Must be written as zeros.
No Acknowledgment. No acknowledgment from
one of the DECchip 21164 processors. Bit <16> ap-
plies to CPU0; bit <17> to CPU1.
CSR Write Not Transmitted. CSR write to other
than the TLMBPR register was not acknowledged.
Window Space Read Pending. Set when a win-
dow space read is pending in the corresponding
CPU. Bit <13> applies to CPU0; bit <14> to CPU1.
Ibox Timeout. When set, indicates that the
DECchip 21164 Ibox timers have fired. Bit <11>
applies to CPU0; bit <12> to CPU1.
Window Space Read Error. When set, indicates
a window space read error. Bit <9> applies to
CPU0; bit <10> to CPU1.
System Fault. When set, indicates that
TLSB_FAULT is asserted, but not by this module.
System Data Error. Set as a result of the asser-
tion of TLSB_DATA_ERROR. If <SYSDERR> is
set and no TLBER bits are set, then <SYSDERR> is
indicative of a TLSB data error detected on a mod-
ule other than TLEP, but not detected on TLEP.
DIGA0 to ADG CSR Parity Error. Set when the
ADG detects a parity error on CSR data transmit-
ted from DIGA0 to the ADG. This error can occur
when a CSR in the ADG is being written. This er-
ror indicates that CSR data has been corrupted.
This is a hard error.
DTag Status Parity Error. Set when the ADG
detects a parity error on duplicate tag store status
data. This error can be detected as a result of any
duplicate tag read, including DTag lookups and di-
agnostic DTag reads. This error indicates corrupted
system coherency. This is a hard error and causes
a machine check.
DTag Data Parity Error. Set when the ADG de-
tects a parity error on duplicate tag store tag data.
This error can be detected as a result of any dupli-
cate tag read, including DTag lookups and diagnos-
tic DTag reads. This error indicates corrupted sys-
tem coherency. This is a hard error and causes a
machine check.