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140 AMD Geode™ LX Processors Data Book
CPU Core Register Descriptions
33234H
5.5.2.34 Extended Debug Registers 9 and 8 MSR (XDR9_XDR8_MSR)
XDR9_XDR8_MSR provides access to Extended Debug Register 9 (XDR9) and Extended Debug Register 8 (XDR8).
XDR8 contains an opcode match value. XDR9 contains an opcode match mask.
MSR Address 00001354h
Typ e R /W
Reset Value FFFFFFFF_00000000h
XDR9_XDR8_MSR Register Map
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
PREFIX_MASK5 OPCODE_MASK5
313029282726252423222120191817161514131211109876543210
PREFIX_VALUE5
OPCODE_VALUE5
PN PR PL PC PS PO PA PF
XDR9_XDR8_MSR Bit Descriptions
Bit Name Description
63:56 PREFIX_MASK5 Prefix Mask Value for Extended Breakpoint 5.
55:32 OPCODE_MASK5 Opcode Mask Value for Extended Breakpoint 5.
31 PN REPNE/REPNZ Prefix Value for Extended Breakpoint 5.
30 PR REP/REPE/REPZ Prefix Value for Extended Breakpoint 5.
29 PL LOCK Prefix Value for Extended Breakpoint 5.
28 PC CS Segment Override Prefix Value for Extended Breakpoint 5.
27 PS SS/DS/ES/FS/GS Segment Override Prefix Value for Extended Breakpoint 5.
26 PO Operand Size Prefix Value for Extended Breakpoint 5.
25 PA Address Size Prefix Value for Extended Breakpoint 5.
24 PF 0F or 0F 0F Prefix Value for Extended Breakpoint 5.
23:0 OPCODE_VALUE5 Opcode Match Value for Extended Breakpoint 5.