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138 AMD Geode™ LX Processors Data Book
CPU Core Register Descriptions
33234H
5.5.2.32 Extended Debug Registers 5 and 4 MSR (XDR5_XDR4_MSR)
XDR5/XDR4_MSR provides access to Extended Debug Register 5 (XDR5) and Extended Debug Register 4 (XDR4). XDR4
contains an opcode match value. XDR5 contains an opcode match mask.
5.5.2.33 Extended Debug Registers 7 and 6 MSR (XDR7_XDR6_MSR)
XDR7_XDR6_MSR provides access to the extended breakpoint enables, types, lengths, and status.
MSR Address 00001352h
Typ e R /W
Reset Value FFFFFFFF_00000000h
XDR5_XDR4_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_MASK4 OPCODE_MASK4
313029282726252423222120191817161514131211109876543210
PREFIX_VALUE4
OPCODE_VALUE4
PN PR PL PC PS PO PA PF
XDR5_XDR4_MSR Bit Descriptions
Bit Name Description
63:56 PREFIX_MASK4 Prefix Mask Value for Extended Breakpoint 4.
55:32 OPCODE_MASK4 Opcode Mask Value for Extended Breakpoint 4.
31 PN REPNE/REPNZ Prefix Value for Extended Breakpoint 4.
30 PR REP/REPE/REPZ Prefix Value for Extended Breakpoint 4.
29 PL LOCK Prefix Value for Extended Breakpoint 4.
28 PC CS Segment Override Prefix Value for Extended Breakpoint 4.
27 PS SS/DS/ES/FS/GS Segment Override Prefix Value for Extended Breakpoint 4.
26 PO Operand Size Prefix Value for Extended Breakpoint 4.
25 PA Address Size Prefix Value for Extended Breakpoint 4.
24 PF 0F or 0F 0F Prefix Value for Extended Breakpoint 4.
23:0 OPCODE_VALUE4 Opcode Match Value for Extended Breakpoint 4.
MSR Address 00001353h
Typ e R /W
Reset Value xxxxxxxx_xxxxxxxxh
XDR7_XDR6_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
LEN3 TYPE3 LEN2 TYPE2 LEN1 TYPE1 LEN0 TYPE0 RSVD E6 E5 E4 E3 E2 E1 E0
313029282726252423222120191817161514131211109876543210
RSVD (1FFFFh) BS
RSVD (1)
BI RSVD (1Fh) B6B5B5B3B2B1B0