Agere Systems Inc.

Scott McCurdy

William R Bullman

A shared memory controller is provided for controlling access to a shared memory by a plurality of processors. At least one device includes a storage area for storing a respective address range for each of a plurality of memory regions. The at least one device further includes a permission table containing, for each of the plurality of memory regions, read and write permission data for each of the plurality of processors. A memory fault detector is coupled to the at least one device and has an input for receiving a memory access request including a memory address, a processor identification and a read/write indicator. The memory fault detector includes logic for determining whether a memory access according to the memory access request would conflict with the read and write permission data in the permission table.

Memory protection system and method

A CPE application automatically detects an intermediate-layer protocol used at a DSL-connection head end and configures the DSL modem driver for that protocol. The application sets the driver to a possible driver protocol and attempts to connect to a head-end server. If a response is received from the head end, then the application reads the headers on the responsive message to determine whether the protocol at the head end is consistent with the protocol that the DSL modem is set to. If so, then the settings are loaded into the driver. If no response is received from the head end, then the application initiates a series of commands to elicit a response from the head end. If the protocol is not consistent or no response is elicited, then the DSL modem is set to another protocol, and the application again attempts to connect to the server at the head end.

DSL automatic protocol detection system

An application implemented at customer premises equipment automatically detects the network-layer protocol used at the head end of a DSL connection and configures the DSL modem driver for that protocol. The application sets the DSL modem driver to one of the possible protocols for the type (e.g., WAN or LAN) of driver being used and attempts to connect to a server at the head end. If a response is received from the head end, then the application reads the headers on the responsive message to determine whether the protocol at the head end is consistent with the protocol that the DSL modem is set to. If the protocols are consistent, then the settings are loaded onto the driver. If no response is received from the head end when the application attempts to connect to the server, then the application initiates a series of commands for the purpose of eliciting a response from the head end. If the protocol is not consistent or no response is elicited, then the DSL modem is set to another protocol, and the application again attempts to connect to the server at the head end. These steps are repeated until either the correct head-end network-layer protocol is found, or the possible protocols are exhausted.

Growing community of inventors

Whitehall, PA, United States of America

Scott McCurdy