公开(公告)号：US20230050729A1

公开(公告)日：2023-02-16

申请号：US17401958

申请日：2021-08-13

Applicant: Texas Instruments Incorporated

Inventor： Eric Thierry Jean Peeters ,  Gary Augustine Cooper ,  Robin Osa Hoel ,  Ruchi Shankar ,  Prachi Mishra

IPC: G06F21/60

Abstract: In described examples, a processor system includes a mailbox, a hardware security functional block (HSFB, also called a trusted agent herein), a processor, and a processor firewall. The HSFB includes a database configured to store at least one software context access rule. The processor executes multiple software contexts. The HSFB approves or denies an access request received from a debugging tool, via the mailbox, in response to the database and a software context identification (ID) included in the access request. The HSFB sends a message to the processor firewall indicating whether the access request is approved. The processor firewall determines whether to pass instructions to the processor for execution with respect to the identified software context in response to the message.

公开(公告)号：US12137081B2

公开(公告)日：2024-11-05

申请号：US17470528

申请日：2021-09-09

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Robin O. Hoel ,  Eric Peeters ,  Prithvi Shankar Yeyyadi Anantha ,  Aniruddha Periyapatna Nagendra ,  Shobhit Singhal ,  Ruchi Shankar ,  Prachi Mishra

IPC: H04L9/40 ,  G06F13/36

Abstract: A microcontroller is provided and comprises a central repository, a processing device, and a firewall. Rule repository memory in the central repository stores one or more access rules defining an access permission of a software context to one or more target resources of the microcontroller. The firewall receives a bus transaction initiated based on an instruction and determines whether any access rule stored in memory of the firewall defines the access permission of the software context to a destination resource. If no access rule stored in the firewall memory defines the access permission, the firewall communicates a miss query condition to the central repository. The central repository searches the rule repository memory for an access rule defining the access permission of the software context to the destination resource, and if a related access rule is found, the related access rule is stored in the firewall memory.

公开(公告)号：US11650930B2

公开(公告)日：2023-05-16

申请号：US17482676

申请日：2021-09-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Veeramanikandan Raju ,  Anand Kumar G ,  Prachi Mishra

IPC: G06F13/10 ,  G06F12/10

CPC classification number: G06F12/10 ,  G06F13/102 ,  G06F2212/657

Abstract: A computing device, including a processor; a memory, wherein the memory is accessible for memory operations via a range of logical memory addresses; a peripheral interface including a first control register; and a peripheral address remapping module configured to determine that the peripheral interface is unused for interfacing with a peripheral; determine a first memory address for accessing the first control register; determine a first logical memory address, the first logical memory address outside of the range of logical memory addresses for accessing the memory; and map the first logical memory address to the first memory address, wherein the first control register is accessible for memory operations using the first logical memory address.

公开(公告)号：US20230076376A1

公开(公告)日：2023-03-09

申请号：US17470528

申请日：2021-09-09

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Robin O. Hoel ,  Eric Peeters ,  Prithvi Shankar Yeyyadi Anantha ,  Aniruddha Periyapatna Nagendra ,  Shobhit Singhal ,  Ruchi Shankar ,  Prachi Mishra

IPC: H04L29/06 ,  G06F13/36

Abstract: A microcontroller is provided and comprises a central repository, a processing device, and a firewall. Rule repository memory in the central repository stores one or more access rules defining an access permission of a software context to one or more target resources of the microcontroller. The firewall receives a bus transaction initiated based on an instruction and determines whether any access rule stored in memory of the firewall defines the access permission of the software context to a destination resource. If no access rule stored in the firewall memory defines the access permission, the firewall communicates a miss query condition to the central repository. The central repository searches the rule repository memory for an access rule defining the access permission of the software context to the destination resource, and if a related access rule is found, the related access rule is stored in the firewall memory.