G1-233P-85-1.8
| Model | G1-233P-85-1.8 |
| Description | Processor Series Low Power Integrated x86 Solution |
| PDF file | Total 247 pages (File size: 4M) |
| Chip Manufacturer | NSC |
Geode™ GX1 Processor Series
Integrated Functions
(Continued)
Table 4-4. L1 Cache BitBLT Register Summary
Mnemonic Name
1
L1_BB0_BASE
L1 Cache BitBLT 0 Base Address
L1_BB0_POINTER
L1 Cache BitBLT 0 Pointer
L1_BB1_BASE
L1 Cache BitBLT 1 Base Address
L1_BB1_POINTER
L1 Cache BitBLT 1 Pointer
1.
2.
Function
2
Contains the L1 set 0 address to the first byte of BLT Buffer 0.
Contains the L1 set 0 address offset to the current line of BLT Buffer 0.
Contains the L1 set 0 address to the first byte of BLT Buffer 1.
Contains the L1 set 0 address offset to the current line of BLT Buffer 1.
For information on accessing these registers, refer to Section 4.1.6 “CPU_READ/CPU_WRITE Instructions” on page
The L1 cache locations accessed by the BitBLT registers must be enabled as scratchpad RAM prior to use.
Table 4-5. L1 Cache BitBLT Registers
Bit
Name
Description
L1_BB0_BASE Register (R/W)
15:12
11:4
3:0
RSVD
INDEX
BYTE
Reserved:
Set to 0.
BitBLT 0 Base Index:
The index to the starting cache line of set 0 in L1 of BLT Buffer 0.
BitBLT 0 Starting Byte:
Determines which byte of the starting line is the beginning of BLT Buffer 0.
L1_BB0_POINTER Register (R/W)
15:12
11:4
3:0
RSVD
INDEX
RSVD
Reserved:
Set to 0.
BitBLT 0 Pointer Index:
The index to the current cache line of set 0 in L1 of BLT Buffer 0.
Reserved:
Set to 0.
L1_BB1_Base Register (R/W)
15:12
11:4
3:0
RSVD
INDEX
BYTE
Reserved:
Set to 0.
BitBLT 1 Base Index:
The index to the starting cache line of set 0 in L1 of BLT Buffer 1.
BitBLT 1 Starting Byte:
Determines which byte of the starting line is the beginning of BLT Buffer 1.
L1_BB1_POINTER Register (R/W)
15:12
11:4
3:0
RSVD
INDEX
RSVD
Reserved:
Set to 0.
BitBLT 1 Pointer Index:
The index to the current cache line of set 0 in L1 of BLT Buffer 1.
Reserved:
Set to 0.
Default Value = None
Default Value = None
Default Value = None
Default Value = None
Revision 1.0
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