User’s Manual
PPC440x5 CPU Core Preliminary
Page 170 of 589 intrupts.fm.
September 12, 2002
Programming Note: An MSR bit that is reserved may be altered byrfmci, consistent with
the value being restored from MCSRR1.
MCSRR1 can be written from a GPR using mtspr, and can be read into a GPR usingmfspr.
6.4.8 Data Exception Address Register (DEAR)
The DEAR contains the address that was referenced by a load, store, or cache management instruction that
caused an Alignment, Data TLB Miss, or Data Storage exception.
The DEAR can be written from a GPR using mtspr, and can be read into a GPR usingmfspr.
6.4.9 Interrupt Vector Offset Registers (IVOR0–IVOR15)
An IVOR specifies the quadword (16 byte)-aligned interrupt vector offset from the base address provided by
the IVPR (see Interrupt Vector Prefix Register (IVPR) on page171) for its respective interrupt type. IVOR0–
IVOR15 are provided for the defined interrupt types. The interrupt vector effective address is formed as
follows:
IVPR0:15 || IVORn16:27 || 0b0000
where nspecifies the IVOR register to be used for the particular interrupt type.
Any IVOR can be written from a GPR using mtspr, and can be read into a GPR usingmfspr.
Figure 0-1. Machine Check Save/Restore Register 1 (MCSRR1)
0:31 Copy of the MSR at the time of a machine check interrupt.
Figure 6-7.Data Exception Address Register (DEAR)
0:31 Address of data exception for Data Storage, Align-
ment, and Data TLB Error interrupts
0 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 31
FE1
WE
PR DS
CE
EE DE
FP
ME DWE
FE0 IS
0 31