Mmu Assist Register 5 (Mas5) - IBM A2 User Manual

User's Manual
A2 Processor

6.17.11 MMU Assist Register 5 (MAS5)

The MAS5 register is written from a GPR using mtspr and can be read into a GPR using mfspr. This register
is replicated for all processing threads. MAS5 is used to supply hypervisor-related parameters for certain TLB
management instructions.
Register Short Name:
Decimal SPR Number:
Initial Value:
Slow SPR:
Guest Supervisor Mapping:
Bits Field Name
32 SGS
33:55 ///
56:63 SLPID
Memory Management
Page 256 of 864
MAS5
339
0x0000000000000000
Y
Initial
Value
0b0 Search Guest State
Specifies the GS value used when searching the TLB during execution of tlbsx and tlbsrx.
and for selecting TLB entries to be invalidated by tlbivax or tlbilx. The SGS field is com-
pared with the TGS field of each TLB entry to find a matching entry.
0x0 Reserved
0x0 Search Logical Partition Identifier
Specifies the LPID value used when searching the TLB during execution of tlbsx and
tlbsrx. and for selecting TLB entries to be invalidated by tlbivax or tlbilx. The SLPID field
is compared with the TLPID field of each TLB entry to find a matching entry.
Read Access:
Write Access:
Duplicated for Multithread:
Notes:
Scan Ring:
Description
Hypv
Hypv
Y
HM
func
Version 1.3
October 23, 2012