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154 SPARC JPS1 Implementation Supplement: Fujitsu SPARC64 V • Release 1.0, 1 July 2002
P.2.2 Summary of Actions Upon Error Detection
TABLE P-2
summarizes what happens when an error is detected.
TABLE P-2
Action Upon Detection of an Error (1 of 4)
Fatal Error (FE)
Error State Transition
Error (EE) Urgent Error (UGE) Restrainable Error (RE)
Error detection
mask (the
condition to
suppress error
detection)
None When
ASI_ECR.WEAK_ED
=1, the error
detection is
suppressed
incompletely.
I_UGE
,
IAE
,
DAE
When
ASI_ECR.WEAK_ED = 1, error
detection is suppressed
incompletely.
A_UGE
Error detection except the
register usage is suppressed
when ASI_ECR.WEAK_ED =1
or upon a condition unique to
each error.
Error detection at the register
usage is suppressed by
conditions unique to each
error.
Only some
A_UGE
s have the
above unique conditions to
suppress error detection; most
do not.
None
Trap mask (the
condition to
suppress the
error trap
occurrence)
None None
I_UGE, IAE, IAE
None
A_UGE
ASI_ECR.UGE_HANDLER =1
or
ASI_ECR.WEAK_ED =1
The
A_UGE
detected during
the trap is suppressed, is kept
pending in the hardware, and
causes the
ADE
trap when the
trap is enabled.
ASI_ECR.UGE_HANDLER = 1
or
ASI_ECR.WEAK_ED =1
or
PSTATE.IE =0
or
ASI_ECR.RTE_xx = 0, where
RTE_xx is the trap enable
mask for each error group.
RTE_xx is RTE_CEDG or
RTE_UE.