GRBUCSSFIDR0
GRBU Coherent Subsystem Snoop Filter Identification Register
| Module Instance | Base Address | Register Address |
|---|---|---|
i_ccu__DSU__1c000000__sys_global_register_blk
|
0x1C0FF000
|
0x1C0FFF00
|
Size: 32
Offset: 0xF00
Access: RO
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 | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
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| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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GRBUCSSFIDR0 Fields
| Bit | Name | Description | Access | Reset |
|---|---|---|---|---|
| 31:29 |
Rsvd1
|
Reserved. |
RO
|
0x0
|
| 28:26 |
filterType
|
Snoop Filter Type. This field indicates the type of snoop filter. The type of the snoop filter is given as follows (all other values are RESERVED): 0b000-Unimplemented filter, 0b001-Null filter, 0b010-Tag filter-presence vector, 0b011-Tag filter-owner pointer/sharer vector, 0b110-Tag filter with victim buffer-presence vector, 0b111-Tag filter with victim buffer-owner pointer/sharer vector |
RO
|
0x3
|
| 25:20 |
nWays
|
Number of Snoop Filter Ways. This field indicates the number of ways (i.e. the associativity) in the snoop filter minus one. For an unimplemented filter or a null filter, the value of this field is zero. |
RO
|
0xA
|
| 19:0 |
nSets
|
Number of Snoop Filter Sets. This field indicates the number of sets in the snoop filter minus one in each DIRU. To determine the total number of sets in the snoop filter, this value must be multiplied by the number of DIRUs. For an unimplemented filter or a null filter, the value of this field is zero. |
RO
|
0x800
|