Managing conflicts on shared L2 bus

• Main Authors: Keil, Shane, Edmondson, John H
• Format: Patent
• Language: English
• Published: 05.06.2012

One embodiment of the present invention sets forth a mechanism to schedule read data transmissions and write data transmissions to/from a cache to frame buffer logic on the L2 bus. When processing a read or a write command, a scheduling arbiter examines a bus schedule to determine that a read-read conflict, a read-write conflict or a write-read exists, and allocates an available memory space in a read buffer to store the read data causing the conflict until the read return data transmission can be scheduled. In the case of a write command, the scheduling arbiter then transmits a write request to a request buffer. When processing a write request, the request arbiter examines the request buffers to determine whether a write-write conflict. If so, then the request arbiter allocates a memory space in a request buffer to store the write request until the write data transmission can be scheduled.