Filter
Top Products
5-6 SA-1100
Developer’s Manual
Coprocessors
5.2.10 Register 9 – Read-Buffer Operations
The read buffer is controlled and accessed through register 9 of coprocessor 15. The functions
supported are: flush-all buffers, flush-a-single entry, load-an-entry (1, 4 or 8 words), and
enable/disable user mode access.
The CRm and OPC_2 fields are used to encode these control operations. All other values for
OPC_2 and CRm are undefined and the results of using them are unpredictable.
See Chapter 6, “Caches, Write Buffer, and Read Buffer” for details on the use and operation of the
read buffer.
5.2.11 Registers 10 – 12 RESERVED
Accessing any of these registers yields unpredictable results.
Function OPC_2 CRm Data
Flush all entries 0b000 0b0000 Ignored
Flush Buffer 0 0b001 0b0000 Ignored
Flush Buffer 1 0b001 0b0001 Ignored
Flush Buffer 2 0b001 0b0010 Ignored
Flush Buffer 3 0b001 0b0011 Ignored
Load Buffer 0 with one word 0b010 0b0000 Virtual address
Load Buffer 0 with four words 0b010 0b0100 Virtual address
Load Buffer 0 with eight words 0b010 0b1000 Virtual address
Load Buffer 1 with one word 0b010 0b0001 Virtual address
Load Buffer 1 with four words 0b010 0b0101 Virtual address
Load Buffer 1 with eight words 0b010 0b1001 Virtual address
Load Buffer 2 with one word 0b010 0b0010 Virtual address
Load Buffer 2 with four words 0b010 0b0110 Virtual address
Load Buffer 2 with eight words 0b010 0b1010 Virtual address
Load Buffer 3 with one word 0b010 0b0011 Virtual address
Load Buffer 3 with four words 0b010 0b0111 Virtual address
Load Buffer 3 with eight words 0b010 0b1011 Virtual address
Disable user-mode MCR access 0b100 0b0000 Ignored
Enable user-mode MCR access 0b101 0b0000 Ignored