Preliminary
www.ti.com
MPU Subsystem
1.2.6.3
AXI to OCP Tag Mapping
and
gives the Read and Write Channel AXI ID to OCP Tag Mappings
Table 1-5. Read Channel AXI ID to OCP Tag Mappings
AXI ID
Request type
OCP Thread[2]
OCP Tag
Outstanding
Requests
4’b0000
NC/SO[1] data load
Thread_Mx
5’b00000
9 (one integer and
up to 8 Neon)
4’b0001
Device data load
Thread_Mx
5’b00001
4’b0011
peripheral
n/a
n/a
4’b1110
Cacheable linefill into L1D
Thread_Mx
5’b01110
4’b0100
NC/SO[1] instruction fetch
Thread_Mx
5’b00100
1
4’b0101
Device instruction fetch
Thread_Mx
5’b00101
4’b1111
Linefills into L1I$ (line is L2
Thread_Mx
5’b01111
non-cacheable)
4’b0110
NC/SO[1] Table-walk requests
Thread_Mx
5’b00110
1
(instruction, data or PLE)
4’b1000
Cacheable linefills (I, D, TLB, PLE) #1,
Thread_Mx
5’b01000
1
except linefill into L1D
4’b1001
Cacheable linefills (I, D, TLB, PLE) #2,
Thread_Mx
5’b01001
1
except linefill into L1D
4’b1010
Cacheable linefills (I, D, TLB, PLE) #3,
Thread_Mx
5’b01010
1
except linefill into L1D
4’b1011
Cacheable linefills (I, D, TLB, PLE) #4,
Thread_Mx
5’b01011
1
except linefill into L1D
4’b0010
Reserved
n/a
n/a
n/a
4’b0111
4’b1100
4’b1101
Table 1-6. Write Channel AXI ID to OCP Tag Mappings
AXI ID
Request type
OCP Thread[2]
OCP Tag
Outstanding
Requests
4’b0000
NC/SO[1], or WT stores
Thread_Mx
5'b10000
Up to 8
4’b0001
Device writes
Thread_Mx
5'b10001
4’b0011
Peripheral write
n/a
n/a
4’b1000
Eviction #1 (including PLE)
Thread_Mx
5'b11000
1
4’b1001
Eviction #2 (including PLE)
Thread_Mx
5'b11001
1
4’b1010
Eviction #3 (including PLE)
Thread_Mx
5'b11010
1
4’b1011
Eviction #4 (including PLE)
Thread_Mx
5'b11011
1
4’b0010
Reserved
n/a
n/a
n/a
4’b0100
4’b0101
4’b0110
4’b0111
4’b1100
4’b1101
4’b1110
4’b1111
103
SPRUGX9 – 15 April 2011
Chip Level Resources
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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