公开(公告)号：US20150317259A1

公开(公告)日：2015-11-05

申请号：US14797859

申请日：2015-07-13

Applicant: Texas Instruments Incorporated

Inventor： Joseph Raymond Michael Zbiciak ,  Amitabh Menon

IPC: G06F12/14

CPC classification number: G06F12/1483 ,  G06F12/14 ,  G06F12/1425 ,  G06F12/1433 ,  G06F12/1441 ,  G06F12/1458 ,  G06F12/1491 ,  G06F13/366 ,  G06F21/78 ,  G06F21/79 ,  G06F2212/1052 ,  Y02D10/14

Abstract: A memory management and protection system that manages memory access requests from a number of requestors. Memory accesses are allowed or disallowed based on the privilege level of the master, usually a CPU originating the request based on a Privilege Identifier that accompanies each memory access request. Deputy masters such as DMA controllers inherit the Privilege Identifier of the originating master. An extended memory controller selects the appropriate set of segment registers based on the Privilege Identifier to insure that the request is compared to and translated by the segment register associated with the master originating the request.

Abstract translation: 一种管理来自多个请求者的存储器访问请求的存储器管理和保护系统。 基于主机的权限级别（通常是根据伴随每个存储器访问请求的权限标识符发起请求的CPU）允许或不允许内存访问。 诸如DMA控制器的副主人继承了始发主机的权限标识符。 扩展存储器控制器基于特权标识符选择适当的段寄存器集合，以确保请求被与发起请求的主机相关联的段寄存器进行比较和转换。

公开(公告)号：US09465753B2

公开(公告)日：2016-10-11

申请号：US14797859

申请日：2015-07-13

Applicant: Texas Instruments Incorporated

Inventor： Joseph Raymond Michael Zbiciak ,  Amitabh Menon

IPC: G06F12/02 ,  G06F12/14 ,  G06F13/366 ,  G06F21/78 ,  G06F21/79

CPC classification number: G06F12/1483 ,  G06F12/14 ,  G06F12/1425 ,  G06F12/1433 ,  G06F12/1441 ,  G06F12/1458 ,  G06F12/1491 ,  G06F13/366 ,  G06F21/78 ,  G06F21/79 ,  G06F2212/1052 ,  Y02D10/14

Abstract: A memory management and protection system that manages memory access requests from a number of requestors. Memory accesses are allowed or disallowed based on the privilege level of the master, usually a CPU originating the request based on a Privilege Identifier that accompanies each memory access request. Deputy masters such as DMA controllers inherit the Privilege Identifier of the originating master. An extended memory controller selects the appropriate set of segment registers based on the Privilege Identifier to insure that the request is compared to and translated by the segment register associated with the master originating the request.