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ISFSR is updated either upon a occurrence of a
instruction_access_exception
detailed update policy of each field, and
ISFSR Update Policy
TABLE F-7
Field
Miss
MMU miss
Exception
Access exception
Error
Access error
Error on exception
Exception on error
Error on miss
Exception on miss
Miss on exception/error
Miss on miss
1.
The value of ISFSR.CT is 11 when the ASI is not a translating ASI. The value 11 is recorded in ISFSR.CT for
an illegal value in the ASI (00
35
–3B
).
16
16
2.
Valid only for the
instruction_access_error
3.
Types: 0 – logical 0; 1 –logical 1; V– Valid field to be updated; "—" – not a valid field
4.
Updated when mITLB is signified.
5.
Types: 0 – logical 0; 1 – logical 1; K – keep; U – Update as per fault/miss
D-SFSR Bit Description (1 of 3)
TABLE F-8
Bits
Field Name
Data <63:62>
TLB#
Data <59:49>
index
100
SPARC JPS1 Implementation Supplement: Fujitsu SPARC64 V • Release 1.0, 1 July 2002
, or an
TLB#, index
FV
Fresh fault or miss
—
0
—
1
4
V
1
Overwrite policy
4
U
1
K
1
U
1
K
1
K
1
K
K
–03
, 12
–13
, 16
16
16
16
16
caused by ISFSR.UE or ISFSR.UPA.
RW
Description
R/W
Faulty TLB# log. Recorded upon an mDTLB error to identify the faulty TLB
(fDTLB: 00
or sDTLB: 10
2
conditions (parity error and multiple-hit error) is as follows:
fTLB parity
sTLB parity
sTLB multihit
fTLB multihit
R/W
Faulty TLB index log. Recorded upon an mDTLB error. Index number for
the faulty TLB. The priority of error logging for multiple error conditions
(parity error and multiple-hit error) is as follows:
fTLB parity
sTLB parity
sTLB-multihit
fTLB-multihit
The smaller index number is selected for multiple hits.
fast_instruction_access_MMU_miss
instruction_access_error
describes the fields.
TABLE F-8
1
OW
PR, CT
FT
3
0
V
0
V
0
V
5
1
U
1
U
K
U
K
U
K
K
K
U
–17
, 1A
–1B
, 1E
–23
16
16
16
16
16
). The priority of error logging for multiple error
2
high
low
high
low
trap.
shows the
TABLE F-7
UE, UPA,
TM
ASI
mITLB, NC
—
1
—
—
V
0
V
—
—
0
V
V
K
K
U
U
U
K
U
K
K
1
U
U
U
1
U
K
K
1
K
K
K
1
K
K
, 2D
–2F
, and
16
16
16
, an
2
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