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    System on chip firewall memory architecture
    32.
    发明授权
    System on chip firewall memory architecture 有权

    公开(公告)号：US11115383B2

    公开(公告)日：2021-09-07

    申请号：US16221318

    申请日：2018-12-14

    Applicant: Texas Instruments Incorporated

    Inventor： Amritpal Singh Mundra ,  Chunhua Hu

    IPC: H04L29/06

    Abstract: In described examples, a system on a chip (SoC) and method for sending messages in the SoC include determining locations of initiator-side firewall block and receiver-side firewall block memories using respective pointers to the firewall block memories stored in a single, contiguous memory. Addresses of the pointers within the single memory depend on respective unique firewall identifiers of the firewall blocks. An exclusive security configuration controller uses the pointers to configure the firewall blocks over a security bus which is electrically isolated from a system bus. The system bus is used to send messages from sending functional blocks to receiving functional blocks. The initiator-side firewall block adds a message identifier to messages. The message identifier depends on the initiator-side firewall block's configuration settings. The receiver-side firewall block controls permission for the receiving functional block to access the message, depending on the message identifier and the receiver-side firewall block's configuration settings.

    Secure message routing
    33.
    发明授权
    Secure message routing 有权

    公开(公告)号：US11093653B2

    公开(公告)日：2021-08-17

    申请号：US16221344

    申请日：2018-12-14

    Applicant: Texas Instruments Incorporated

    Inventor： Amritpal Singh Mundra ,  Eric Lasmana

    IPC: G06F21/72 ,  G06F15/78 ,  G06F21/74 ,  G06F9/54

    Abstract: In described examples, a method of routing messages in a system on a chip (SoC) includes a secure message router receiving a message including a content, an identifier of the message's sending (origin) functional block and/or of a receiving (destination) functional block, a message secure value, a promote value, and a demote value. A context corresponding to the identifier is retrieved from a memory. The context includes an allow promote value and an allow demote value. The message secure value is increased if the promote value requests the increase and matches the allow promote value. The message secure value is decreased if the demote value requests the decrease and matches the allow demote value. Cleartext corresponding to the content is made accessible by the destination if the context secure value matches the message secure value. The message is then outputted from the secure message router to the destination.

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