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C_STAT[4:0] As follows:
C_STS[3:0] If C_STAT equals xxx_MEM_ERR or xxx_BC_ERR, then C_STS contains the
status of the block as follows; otherwise, the value of C_STS is X:
C_ADDR[6:42] Address of last reported ECC or parity error. If C_STAT value is
DSTREAM_DC_ERR, only bits 6:19 are valid.
Table 5–26 Cbox Read IPR Fields Description (Continued)
Name Description
Bits Error Status
0 0 0 0 0 Either no error, or error on a speculative load, or a Bcache victim read
due to a Dcache/Bcache miss
00001 BC_PERR(Bcachetagparityerror)
0 0 0 1 0 DC_PERR (duplicate tag parity error)
0 0 0 1 1 DSTREAM_MEM_ERR
0 0 1 0 0 DSTREAM_BC_ERR
00101 DSTREAM_DC_ERR
0011XPROBE_BC_ERR
01000 Reserved
01001 Reserved
01010 Reserved
0 1 0 1 1 ISTREAM_MEM_ERR
0 1 1 0 0 ISTREAM_BC_ERR
01101 Reserved
0111XReserved
1 0 0 1 1 DSTREAM_MEM_DBL
1
1
When the Cbox WRITE_ONCE chain bit
SKEWED_FILL_MODE[0] is clear, the error status is as specified;
when set, the error status applies only to first octaword of the fill, and
error status for the rest of the fill is generic DOUBLE_BIT_ERROR
(1XXXX).
10100 DSTREAM_BC_DBL
1
1 1 0 1 1 ISTREAM_MEM_DBL
1
11100 ISTREAM_BC_DBL
1
Bit Value Status of Block
7:4 Reserved
3Parity
2Valid
1Dirty
0Shared