AT91RM9200-CI-002 Atmel, AT91RM9200-CI-002 Datasheet - Page 56

• Manufacturer Part Number: AT91RM9200-CI-002
• Description: IC ARM9 MCU 256 BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-CI-002

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR
• Number Of I /o: 122
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: ROM
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

11.7.10
Access: Read/Write
The CP15 Register 9, or Cache Lockdown Register, is 0x0 on reset. The Cache Lockdown Register allows software to con-
trol which cache line in the ICache or DCache is loaded for a linefill. It prevents lines in the ICache or DCache from being
evicted during a linefill, locking them into the cache.
Reading from the CP15 Register 9 returns the value of the Cache Lockdown Register that is the base pointer for all cache
segments.
Only the bits[31:26] are returned; others are unpredictable.
Writing to the CP15 Register 9 updates the Cache Lockdown Register with both the base and the current victim pointers for
all cache segments.
Table 11-8.
• index[31:26]: Victim Pointer
Current victim pointer that specifies the cache line to be used as victim for the next linefill.
The non-defined bits should be zero when written and are unpredictable when read.
56
Function
Read DCache lockdown base
Write DCache victim and lockdown base
Read ICache lockdown base
Write ICache victim and lockdown base
31
23
15
7
-
-
-
AT91RM9200
CP15 Register 9, Cache Lockdown Register
Cache Lockdown Functions
30
22
14
6
-
-
-
29
21
13
5
-
-
-
index
28
20
12
4
-
-
-
Victim = Base
Victim = Base
27
19
11
3
-
-
-
Base
Base
Data
26
18
10
2
-
-
-
CRm
0
0
0
0
25
17
9
1
-
-
-
-
1768I–ATARM–09-Jul-09
opcode_2
0
0
1
1
24
16
8
0
-
-
-
-