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.

公开(公告)号：US11972030B2

公开(公告)日：2024-04-30

申请号：US17402693

申请日：2021-08-16

Applicant: Texas Instruments Incorporated

Inventor： Amritpal Singh Mundra ,  Eric Lasmana

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

CPC classification number: G06F21/72 ,  G06F9/546 ,  G06F15/7807 ,  G06F21/74

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.

公开(公告)号：US20210374286A1

公开(公告)日：2021-12-02

申请号：US17402693

申请日：2021-08-16

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.