Epson ARM720T Benutzerhandbuch
11: Test Support
11-4
EPSON
ARM720T CORE CPU MANUAL
Table 11-3 summarizes register c7, c9, and c15 operations.
The CAM read format for Rd is shown in Figure 11-2.
Figure 11-2 Rd format, CAM read
The CAM write format for Rd is shown in Figure 11-3.
Figure 11-3 Rd format, CAM write
In Figure 11-3, bit labels have the following meanings:
V
Valid.
De
Dirty even (words [3:0]). Not used.
Do
Dirty odd (words [7:4]). Not used.
WB
Writeback. Not used.
Table 11-3 Summary of CP15 register c7, c9, and c15 operations
Function
Rd Instruction
Invalidate cache
SBZ
MCR p15, 0, <Rd>, c7, c7, 0
Write cache victim and lockdown base
Victim=Base
MCR p15, 0, <Rd>, c9, c0, 0
Write cache victim
Victim, Seg
MCR p15, 0, <Rd>, c9, c1, 0
CAM read to C15.C
Seg
MCR p15, 2, <Rd>, c15, c7, 2
CAM write
Tag, Seg, Dirty
MCR p15, 2, <Rd>, c15, c7, 6
RAM read to C15.C
Seg, Word
MCR p15, 2, <Rd>, c15, c11, 2
RAM write from C15.C
Seg, Word
MCR p15, 2, <Rd>, c15, c11, 6
CAM match, RAM read to C15.C
Tag, Seg, Word
MCR p15, 2, <Rd>, c15, c7, 5
Write to register C15.C
Data
MCR p15, 3, <Rd>, c15, c3, 0
Read from register C15.C
Data read
MRC p15, 3, <Rd>, c15, c3, 0
SBZ
Seg
31
7 6 5 4
0
SBZ
31
7 6 5 4
0
MVA TAG
De
Seg
Do
WB
V
1
2
3
SBZ