Translation lookaside buffer (TLB) (mTLB) in process-specific memory for enhancing memory management unit (MMU) TLB for translating virtual addresses (VA) to physical addresses (PA) in processor-based systems

Abstract

A process-specific memory translation lookaside buffer (TLB) (mTLB) for enhancing a memory management unit (MMU) TLB for translating a virtual address (VA) to a physical address (PA) in a processor-based system is disclosed. In disclosed examples, an in-store TLB that is specific for each process is supported in system memory such that a cache page table entry of one process does not replace a cache page table entry of another process. When a process is scheduled to execute in a central processing unit (CPU), an in-memory TLB address stored for the process may be used by a page table traversal circuit in the CPU MMU to access a dedicated in-memory TLB for executing a process for performing a VA to PA translation when a TLB miss occurs in the MMU TLB. If a TLB miss occurs in the in-store TLB, the page table traversal circuit may traverse the page table in the MMU.

Description

technical field [0001] The techniques of this disclosure relate to processor-based systems employing a central processing unit (CPU) (also referred to as a "processor"), and more particularly to being accessed to provide virtual address (VA) to physical address (PA) translation The memory management unit (MMU) in the processor includes the translation lookaside buffer (TLB) and page tables. Background technique [0002] Microprocessors, also known as "processors," perform computing tasks for a wide variety of applications. A traditional microprocessor includes one or more central processing units (CPUs), also known as processor cores. The processor is implemented in a processor-based system that includes a memory system that is accessed to retrieve computer instructions for execution by the processor to perform tasks. The storage system is also accessed to retrieve data for executing the computer instructions. The results of executed computer instructions may be stored as...

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