公开(公告)号：US20200371926A1

公开(公告)日：2020-11-26

申请号：US16882365

申请日：2020-05-22

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Abhijeet Ashok CHACHAD ,  Naveen BHORIA ,  David Matthew THOMPSON ,  Neelima MURALIDHARAN

IPC: G06F12/0811 ,  G06F12/0891 ,  G06F12/0817 ,  G06F9/46 ,  G06F9/30

Abstract: A method includes receiving, by a L2 controller, a request to perform a global operation on a L2 cache and preventing new blocking transactions from entering a pipeline coupled to the L2 cache while permitting new non-blocking transactions to enter the pipeline. Blocking transactions include read transactions and non-victim write transactions. Non-blocking transactions include response transactions, snoop transactions, and victim transactions. The method further includes, in response to an indication that the pipeline does not contain any pending blocking transactions, preventing new snoop transactions from entering the pipeline while permitting new response transactions and victim transactions to enter the pipeline; in response to an indication that the pipeline does not contain any pending snoop transactions, preventing, all new transactions from entering the pipeline; and, in response to an indication that the pipeline does not contain any pending transactions, performing the global operation on the L2 cache.

公开(公告)号：US20200371874A1

公开(公告)日：2020-11-26

申请号：US16882372

申请日：2020-05-22

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Abhijeet Ashok CHACHAD ,  David Matthew THOMPSON ,  Son Hung TRAN

IPC: G06F11/10 ,  G06F13/16

Abstract: An apparatus includes a central processing unit (CPU) core and a cache subsystem coupled to the CPU core. The cache subsystem includes a memory configured to store a line of data and an error correcting code (ECC) syndrome associated with the line of data, where the ECC syndrome is calculated based on the line of data and the ECC syndrome is a first type ECC. The cache subsystem also includes a controller configured to, in response to a request from a master configured to implement a second type ECC, the request being directed to the line of data, transform the first type ECC syndrome for the line of data to a second type ECC syndrome send a response to the master. The response includes the line of data and the second type ECC syndrome associated with the line of data.

公开(公告)号：US20200371834A1

公开(公告)日：2020-11-26

申请号：US16882321

申请日：2020-05-22

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Abhijeet Ashok CHACHAD ,  David Matthew THOMPSON

IPC: G06F9/46 ,  G06F9/48 ,  G06F9/448 ,  G06F9/38 ,  G06F9/54 ,  G06F12/0811 ,  G06F11/30

Abstract: A method includes receiving, by a first stage in a pipeline, a first transaction from a previous stage in pipeline; in response to first transaction comprising a high priority transaction, processing high priority transaction by sending high priority transaction to a buffer; receiving a second transaction from previous stage; in response to second transaction comprising a low priority transaction, processing low priority transaction by monitoring a full signal from buffer while sending low priority transaction to buffer; in response to full signal asserted and no high priority transaction being available from previous stage, pausing processing of low priority transaction; in response to full signal asserted and a high priority transaction being available from previous stage, stopping processing of low priority transaction and processing high priority transaction; and in response to full signal being de-asserted, processing low priority transaction by sending low priority transaction to buffer.