Transactional memory that performs a programmable address translation if a DAT bit in a transactional memory write command is set

摘要

A transactional memory receives a command, where the command includes an address and a novel DAT (Do Address Translation) bit. If the DAT bit is set and if the transactional memory is enabled to do address translations and if the command is for an access (read or write) of a memory of the transactional memory, then the transactional memory performs an address translation operation on the address of the command. Parameters of the address translation are programmable and are set up before the command is received. In one configuration, certain bits of the incoming address are deleted, and other bits are shifted in bit position, and a base address is ORed in, and a padding bit is added, thereby generating the translated address. The resulting translated address is then used to access the memory of the transactional memory to carry out the command.

主权项

1. A transactional memory, comprising:
a memory; and interface and decoding circuit that receives a command onto the transactional memory via a bus, wherein the command includes an incoming address and a “Do Address Translation” (DAT) bit, wherein if the command is a command to access the memory and the DAT bit is set then the interface and decoding circuit performs address translation on the incoming address by deleting certain bits and shifting other bits of the incoming address thereby generating a translated address so that the transactional memory uses the translated address to access the memory, whereas if the DAT bit is not set then the interface and decoding circuit does not perform address translation but rather the transactional memory uses the incoming address to access the memory, and wherein the transactional memory is not a processor that fetches instructions.