摘要:
According to one embodiment, a search engine device (100) may include an input (102), search portion (106), and a vote portion (108). A vote portion (108) may receive responses to a search request at inputs. According to precedence information in received responses, a vote portion (108) may generate an output response having its own precedence information.
摘要:
A content addressable memory (CAM) device (100) may include a number of blocks (102-[n−1, n, n+1]) that each generate CAM search results and result compare circuits (104-[n−1, n, n+1] that receive CAM search results from multiple blocks (102-[n−1, n, n−1]), and compare at least a portion of such CAM search results. According to such a comparison result, a compare circuit (104-[n−1, n, n+1]) can generate an output CAM search result for subsequent comparison with CAM search result in another compare circuit (104-[n−1, n, n+1]).
摘要:
According to an embodiment, a content addressable memory (CAM) device (104) may be capable of executing a “restricted” search operation. A restricted search operation (an “explore” or “search beyond” operation) may compare only a portion of the CAM entries to a search key device. Preferably, a restricted search operation may restrict searches to entries having an index value greater than a received search index value.
摘要:
A search engine system (100) is disclosed that can include at least one content addressable memory (CAM) device (102) arranged in a cascade configuration with at least one memory device (104), such as a static random access memory (SRAM). A CAM device (102) and memory device (104) may be connected to one another by point-to-point unidirectional connections. Command data issued by a device, such as a network processing unit (NPU) (110), can flow through all devices beginning with a CAM device (102) and eventually to a memory device (104). A memory device (104) can compare its own current result data with that of a previous device in a flow (such as another RAM device), and generate an output response.
摘要:
A method and apparatus for configuring signal lines with idle codes is disclosed. According to one embodiment, data transmission system (100) may include encoders (112, 114, 116 and 118) that transmit data over signal line lanes (Lane 0 to Lane n). In an idle state, an encoder (112, 114, 116 and 118) may output one of at least two idle codes (IDLE A and IDLE B). One idle code (IDLE A) may indicate a first lane of a group of lanes. Another idle code (IDLE B) may indicate subsequent lanes of a group of lanes.
摘要:
A method and apparatus for configuring signal lines with idle codes is disclosed. According to one embodiment, data transmission system (100) may include encoders (112, 114, 116 and 118) that transmit data over signal line lanes (Lane 0 to Lane n). In an idle state, an encoder (112, 114, 116 and 118) may output one of at least two idle codes (IDLE A and IDLE B). One idle code (IDLE A) may indicate a first lane of a group of lanes. Another idle code (IDLE B) may indicate subsequent lanes of a group of lanes.
摘要:
According to one embodiment, a content addressable memory (CAM) device (100) may include a number of segments (102 or 104). Search target compare circuits (110 and 112) can compare a target value TARGET to programmable information values (PIV0 and PIV1) associated with a particular segment (102 and 104). If a search target value TARGET matches a programmable information value (PIV0 and PIV1), search operations may be performed in a segment (102 or 104). If a search target value TARGET does not match a programmable information value, (PIV0 and PIV1), search operations may be prevented within a segment (102 or 104).
摘要:
A search engine system (100) is disclosed that can include at least one content addressable memory (CAM) device (102) arranged in a cascade configuration with at least one memory device (104), such as a static random access memory (SRAM). A CAM device (102) and memory device (104) may be connected to one another by point-to-point unidirectional connections. Command data issued by a device, such as a network processing unit (NPU) (110), can flow through all devices beginning with a CAM device (102) and eventually to a memory device (104). A memory device (104) can compare its own current result data with that of a previous device in a flow (such as another RAM device), and generate an output response.
摘要:
A search engine system (100) and CAM device (300) are disclosed. A search engine system (100) may generate response packets (112) in response to requests packets (110) and include at least one content addressable memory (CAM) device (102-0) having an input interface (116-0) for receiving data packets and an output interface (116-1) for transmitting data packets.
摘要:
According to a data packet framing method of one embodiment, a data packet (100) may include a combination control character (102) that may convey framing information FLAG (102-0) and a code information CODE (102-1). Framing information FLAG (102-0) can indicate a start of a packet, and a code information CODE (102-1) can indicate another feature of a packet, such as size. A combination control character (102) may preferably be no larger than a data character of a data packet.