公开(公告)号：US12013931B2

公开(公告)日：2024-06-18

申请号：US17550948

申请日：2021-12-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kedar Satish Chitnis ,  Mihir Narendra Mody ,  Amritpal Singh Mundra ,  Yashwant Dutt ,  Gregory Raymond Shurtz ,  Robert John Tivy

IPC: G06F21/54 ,  G06F9/48 ,  G06F21/55 ,  G06F21/79

CPC classification number: G06F21/54 ,  G06F9/485 ,  G06F21/554 ,  G06F21/79

Abstract: A method of enabling memory access freedom from interference (FFI) rules, comprising: determining a first safety privilege access ID (PrivID) for a first component of a system (e.g., based on Automotive Safety Integrity Level (ASIL) attributes of tasks executed by the first component); determining a first access attribute for a first software task executing on the first component; receiving, at a first firewall component of the system, a request from the first software task to access a first memory region of a second component of the system, wherein the request specifies the first PrivID and the first access attribute; and determining, by the first firewall component, whether to permit the first software task to access the first memory region based on the first PrivID, the first access attribute, and the first memory region.