27 debug registers 1 and 0 msr (dr1_dr0_msr), 28 debug registers 3 and 2 msr (dr3_dr2_msr), 00001340h – AMD Geode LX [email protected] User Manual
Page 135: Debug registers 1 and 0 msr (dr1_dr0_msr), Xxxxxxxx_xxxxxxxxh, 00001341h, Debug registers 3 and 2 msr (dr3_dr2_msr)
AMD Geode™ LX Processors Data Book
135
CPU Core Register Descriptions
33234H
5.5.2.27 Debug Registers 1 and 0 MSR (DR1_DR0_MSR)
DR1_DR0_MSR provides access to Debug Register 1 (DR1) and Debug Register 0 (DR0). DR0 and DR1 each contain
either an I/O port number or a linear address for use as a breakpoint. The contents of debug registers are more easily
accessed using the MOV instruction.
5.5.2.28 Debug Registers 3 and 2 MSR (DR3_DR2_MSR)
DR3/DR2_MSR provides access to Debug Register 3 (DR3) and Debug Register 2 (DR2). DR2 and DR3 each contain
either an I/O port number or a linear address for use as a breakpoint. The contents of debug registers are more easily
accessed using the MOV instruction.
MSR Address
00001340h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
DR1_DR0_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
DR1
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
DR0
DR1_DR0_MSR Bit Descriptions
Bit
Name
Description
63:32
DR1
Breakpoint 1 I/O Port Number/Linear Address.
31:0
DR0
Breakpoint 0 I/O Port Number/Linear Address.
MSR Address
00001341h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
DR3_DR2_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
DR3
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
DR2
DR2_DR3_MSR Bit Descriptions
Bit
Name
Description
63:32
DR3
Breakpoint 3 I/O Port Number/Linear Address.
31:0
DR2
Breakpoint 2 I/O Port Number/Linear Address.