agent_ccc0_ccc_hash_bypass

         This control register allows the directory to avoid index hashing. The directory is designed with two different indexing mechanisms. For way 0, the index bits specified in the configuration are used directly from the address. For way 1, additional address bits XORed with the index bits. This hashing is used to reduce the probability of conflicts within the directory.
The hash bypass register will skip the hashing that is performed for way 1. This can allow a more straightforward debug. It can also be used with the indirect access control registers to enable a more intuitive access of the RAM array.
A change of this bypass will change the lookup mechanism of the RAM. Since it changes the location where addresses can reside, this bypass should only be used when the directory is invalid or during debug operations. If changed during normal operation, coherency will likely be violated.

      
Module Instance Base Address Register Address
i_ccu_noc_registers 0xF7000000 0xF7030030

Size: 64

Offset: 0x30030

Access: RW

Access mode: SECURE | PRIVILEGEMODE

Note: The processor must make a secure, privileged bus access to this register. You can configure processor mode settings in the control registers of the ARM Cortex-A53 MPcore processor. For more information about processor modes, please refer to the ARM Infocenter.

Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
Bit Fields
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48

UNSD_63_1

RO 0x0

47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32

UNSD_63_1

RO 0x0

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

UNSD_63_1

RO 0x0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

UNSD_63_1

RO 0x0

DIS

RW 0x0

agent_ccc0_ccc_hash_bypass Fields

Bit Name Description Access Reset
63:1 UNSD_63_1
                 
                 
RO 0x0
0 DIS
                 1'b1: A value of 1 indicates hashing should be ignored
1'b0: A value of 0 indicates hashing should be used, which is also the default

                 
RW 0x0