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User’s Manual
Preliminary PPC440x5 CPU Core
intrupts.fm.
September 12, 2002
Page 175 of 589
6.5 Interrupt Definitions
Table 6-2 provides a summary of each interrupt type, in the order corresponding to their associated IVOR
register. The table also summarizes the various exception types that may cause that interrupt type; the clas-
sification of the interrupt; which ESR bit(s) can be set, if any; and which mask bit(s) can mask the interrupt
type, if any.
Detailed descrptions of each of the interrupt types follow the table..
5 ICP
Instruction Cache Parity Error
0 Exception not caused by I-cache parity error
1 Exception caused by I-cache parity error
6 DCSP
Data Cache Search Parity Error
0 Exception not caused by DCU Search parity error
1 Exception caused by DCU Search parity error
Set if and only If the DCU parity error was dis-
covered during a DCU Search operation.
See Data Cache Parity Operations on
page 129.
7 DCFP
Data Cache Flush Parity Error
0 Exception not caused by DCU Flush parity error
1 Exception caused by DCU Flush parity error
Set if and only If the DCU parity error was dis-
covered during a DCU Flush operation.
See Data Cache Parity Operations on
page 129.
8 IMPE
Imprecise Machine Check Exception
0 No imprecise machine check exception occurred.
1 Imprecise machine check exception occurred.
Set if a machine check exception occurs that
sets MCSR[MCS] (or would if it were not
already set) and MSR[ME] = 0.
9:31 Reserved
Table 6-2. Interrupt and Exception Types
IVOR Interrupt Type Exception Type
Asynchronous
Synchronous, Precise
Synchronous, Imprecise
Critical
ESR
(See Note 4)
MSR Mask Bit(s)
DBCR0/TCR Mask Bit
Notes
IVOR0 Critical Input Critical Input x x CE 1
IVOR1 Machine Check
Instruction Machine Check [MCI] ME 2
Data Machine Check ME 2
TLB Machine Check ME 2
IVOR2 Data Storage
Read Access Control x [FP,AP]
Write Access Control x ST,[FP,AP]
Cache Locking x {DLK
0
,DLK
1
}
Byte Ordering x BO,[ST],[FP,AP] 5
IVOR3 Instruction Storage
Execute Access Control x
Byte Ordering x BO 6
IVOR4 External Input External Input x EE 1
IVOR5 Alignment Alignment x [ST],[FP,AP]