The purpose of the L2 data array operations is to:

The L2 data array operation is accessible in secure privileged modes only. You can determine the value of N in Figure 3.88 and Figure 3.89 from Table 3.163.

Figure 3.88 shows the bit arrangement of the L2 data RAM array read operation.

Figure 3.89 shows the bit arrangement of the L2 data RAM array write operation.

To write one entry to the L2 data RAM array, for example:

LDR R0, =0x01234567;            

MCR p15, 0, R0, c15, c8, 0;     Move R0 to L2 Data 0 Register

LDR R0, =0x89ABCDEF;            

MCR p15, 0, R0, c15, c8, 1;     Move R0 to L2 Data 1 Register

LDR R0, =0x00000001;            

MCR p15, 0, R0, c15, c8, 5;     Move R0 to L2 Data 2 Register

LDR R1, =0x400000C8;            

MCR p15, 0, R1, c15, c8, 3;     Write L2 Data 0-2 Registers to L2 data RAM

To read one entry from the L2 data RAM array, for example:

LDR R1, =0x400000C8;           

MCR p15, 0, R1, c15, c9, 3;     Read L2 data RAM into L2 Data 0-2 Registers

MRC p15, 0, R2, c15, c8, 0;     Move L2 Data 0 Register to R2

MRC p15, 0, R3, c15, c8, 1;     Move L2 Data 1 Register to R3

MRC p15, 0, R4, c15, c8, 5;     Move L2 Data 2 Register to R4