Restrainable Error - Fujitsu SPARC JPS1 Implementation Supplement Manual

The
Traps for Urgent Errors
When an urgent error is detected and not masked, the error is reported to privileged
software by the following exceptions:
I_UGE
IAE
DAE
P.1.4

Restrainable Error

A restrainable error is one that does not adversely affect the currently executing
program and that does not require immediate handling by privileged software. A
restrainable error causes a disrupting trap with low priority.
There are three types of restrainable errors.
Correctable Error (
Upon detecting the
has no deleterious effect on the CPU.
When a
by hardware, but it depends on the
the
Uncorrectable error without direct damage to the currently executing
instruction sequence.
An error detected in cache line writeback or copyback data is of this type.
152 SPARC JPS1 Implementation Supplement: Fujitsu SPARC64 V • Release 1.0, 1 July 2002
When the resource with the error is used, the program cannot continue
execution, or the error_state transition error or the fatal error is detected.
The error in an important resource that is expected to invoke the operating
system "panic" process
The operating system panic process is expected when this error is detected
because the normal processing cannot be expected to continue when this error
occurs.
is a disrupting error with the following deviations.
A_UGE
The trap for is not masked by PSTATE.IE.
A_UGE
The instruction designated by TPC may not end precisely. The instruction end-
method is reported in the trap status register for
, :
async_data_error
A_UGE
:
instruction_access_error
:
data_access_error
), corrected by hardware
CE
, the hardware uses the data corrected by hardware. So a
CE
is detected, data seen by the CPU has always already been corrected
CE
is corrected or not.
CE
A_UGE
exception
exception
exception
type whether the original data containing
CE
.
CE