CN115913816A - Communication conversion device and method for communication between master equipment and slave equipment - Google Patents
Communication conversion device and method for communication between master equipment and slave equipment Download PDFInfo
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Abstract
The invention discloses a communication conversion device and a method for communication between master equipment and slave equipment. The method comprises the following steps: the conversion controller is used for carrying out signal conversion processing on the operation request signal of the master device, forming a slave device driving signal and sending the slave device driving signal to the slave device, and forming a first response driving signal and feeding the first response driving signal back to the master device; and the response signal in the Wishbone protocol format fed back by the slave device is subjected to signal conversion processing to form a second response driving signal in the TileLink-UL D channel format and fed back to the master device. The operation request signal of the master device is converted into a slave device driving signal which can be responded by the slave device and a first response driving signal which responds to the master device through the conversion controller, and then the response signal of the slave device is converted into a second response driving signal which responds to the master device, so that communication conversion and data interaction between the TileLink-UL master device and the Wishbone protocol slave device under the same bit width are realized.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication protocol conversion, in particular to a communication conversion device and a communication conversion method for communication between master equipment and slave equipment.
Background
TileLink is a chip-level interconnect standard that provides consistent (coherent) memory mapped access to memory and other slave devices for multiple master devices. TileLink is designed for System on Chip (SoC) to interface with general purpose multiprocessors, coprocessors, accelerators, DMA engines, and simple or complex devices using fast scalable interconnects to provide low latency and high throughput data handling; the TileLink bus protocol comprises three sub-protocols, namely a TileLink cache-free lightweight sub-protocol (TileLink-UL), a TileLink cache-free heavyweight sub-protocol (TileLink-UH) and a TileLink cache support level protocol (TileLink-C) from few functions to many structures. The Wishbone bus completes interconnection by establishing a common interface between Internet Protocol (IP) cores. The method can be used for interconnection among the soft core, the fixed core and the hard core, has a simple and compact structure, and supports data formats of a big end and a small end.
The Wishbone bus has clear and easily-understood logic and a simple and compact structure, so the Wishbone bus is still used in many scenes with relaxed requirements on data read-write time sequences. The TileLink bus has been increasingly applied in various situations due to its relatively complete function and reliable performance. However, at present, the switching data of the TileLink-UL bus and the Wishbone bus is less, and there is a certain gap in the technical field, so that a general TileLink-UL and Wishbone bus switching method is necessary to be provided for interconnection of the TileLink-UL interface device and the Wishbone interface device in practical application.
Disclosure of Invention
The embodiment of the invention provides a communication conversion device and a communication conversion method between master equipment and slave equipment, which are used for realizing the communication conversion between TileLink-UL master equipment and Wishbone protocol slave equipment under the same bit width.
In one aspect of the present invention, a communication conversion apparatus for communication between a master device and a slave device is provided, where the TileLink-UL interface for connecting at least one TileLink-UL master device and the Wishbone protocol interface for connecting Wishbone protocol slave devices are connected, and the apparatus further includes: a conversion controller;
the conversion controller is configured to perform signal conversion processing on an operation request signal in a TileLink-UL a channel format of the master device, form a slave device drive signal in a Wishbone protocol format, send the slave device drive signal to the slave device, form a first response drive signal in a TileLink-UL D channel format, and feed the first response drive signal back to the master device; and the slave device is further configured to perform signal conversion processing on the response signal in the Wishbone protocol format fed back by the slave device, form a second response driving signal in the TileLink-UL D channel format, and feed back the second response driving signal to the master device.
In one aspect of the present invention, a communication conversion method for communication between a master device and a slave device is provided, which is applied to a communication conversion device for communication between a master device and a slave device, and the communication conversion device for communication between a master device and a slave device includes: the method comprises the following steps of connecting a TileLink-UL interface of at least one TileLink-UL main device, connecting a Wishbone protocol interface of Wishbone protocol slave devices and a conversion controller, wherein the method comprises the following steps:
performing signal conversion processing on the operation request signal in the TileLink-UL A channel format of the main equipment through the conversion controller to form a slave equipment driving signal in a Wishbone protocol format, sending the slave equipment driving signal to the slave equipment, and forming a first response driving signal in the TileLink-UL D channel format and feeding the first response driving signal back to the main equipment;
and performing signal conversion processing on the response signal in the Wishbone protocol format fed back by the slave equipment through the conversion controller to form a second response driving signal in the TileLink-UL D channel format and feed back the second response driving signal to the master equipment.
The technical scheme of the embodiment of the invention comprises the following steps: the TileLink-UL interface connected with at least one TileLink-UL main device and the Wishbone protocol interface connected with Wishbone protocol slave device further comprise: a conversion controller; the switching controller is used for performing signal switching processing on an operation request signal in a TileLink-UL A channel format of the main equipment, forming a slave equipment driving signal in a Wishbone protocol format, sending the slave equipment driving signal to the slave equipment, forming a first response driving signal in a TileLink-UL D channel format, and feeding the first response driving signal back to the main equipment; and the response signal in the Wishbone protocol format fed back by the slave equipment is subjected to signal conversion processing to form a second response driving signal in the TileLink-UL D channel format and fed back to the master equipment. According to the technical scheme, the operation request signal of the TileLink-UL main equipment is converted into a slave equipment driving signal which can be responded by the Wishbone protocol slave equipment and a first response driving signal which responds to the D channel of the main equipment through the conversion controller, and then a response signal of the slave equipment is converted into a second response driving signal which responds to the D channel of the main equipment, so that the automatic conversion of communication signals between the main equipment and the slave equipment is realized, and the communication conversion and data interaction between the TileLink-UL main equipment and the Wishbone protocol slave equipment under the same position width are realized.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a communication conversion apparatus for communication between a master device and a slave device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an implementation of a read/write operation timing control of a communication conversion apparatus when an operation request signal is error-free according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating an implementation of a read/write operation timing control of a communication conversion apparatus according to an embodiment of the present invention when an operation request signal is faulty;
fig. 4 is a flowchart illustrating a communication conversion method for communication between a master device and a slave device according to a second embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Example one
Fig. 1 is a schematic structural diagram of a communication conversion device for communication between a master device and a slave device according to an embodiment of the present invention, where the system is applicable to a communication conversion situation between a TileLink-UL master device and a Wishbone protocol slave device with the same bit width, and as shown in fig. 1, the communication conversion device 10 for communication between the master device and the slave device includes: the TileLink-UL interface 11 of the TileLink-UL master device and the Wishbone protocol interface 12 connected to the Wishbone protocol slave device further include: a conversion controller 13. Wherein, the conversion controller 13 includes: the apparatus includes a master input signal buffer, a same bit width mapping region for performing same data bit width mapping on each input signal, a master output signal buffer, a control module region, a slave output signal buffer, a slave input signal buffer, and an error detection region (where the error detection region may be configured unnecessarily), and arrows may represent transmission of each signal.
It should be noted that the parity width may be understood as the data bit width of the master device and the slave device is the same; the data bit width is understood to be the bus bit width, i.e. the number of data bits that can be transmitted simultaneously on the bus. When the master device transmits an operation request once, the slave device can respond to the operation request transmitted by the master device by one-time processing.
The conversion controller 13 is configured to perform signal conversion processing on an operation request signal in a TileLink-UL a channel format of the master device, form a slave device driving signal in a Wishbone protocol format, send the slave device driving signal to the slave device, form a first response driving signal in a TileLink-UL D channel format, and feed the first response driving signal back to the master device; and the response signal in the Wishbone protocol format fed back by the slave device is subjected to signal conversion processing to form a second response driving signal in the TileLink-UL D channel format and fed back to the master device.
In this embodiment, the TileLink-UL master device may be understood as a master device based on the TileLink-UL protocol, that is, the master device uses the TileLink-UL protocol; wherein the master device can be understood as a device with operational requirements; the TileLink-UL master device may also be referred to as a master device hereinafter. A Wishbone protocol slave device may be understood as a Wishbone protocol-based slave device, that is, a slave device uses the Wishbone protocol; the slave equipment can be understood as equipment which completes the corresponding function of the operation request; the Wishbone protocol slave device below may also be referred to as a slave device. The TileLink-UL interface 11 may be understood as an interface using the TileLink-UL protocol. The Wishbone protocol interface 12 may be understood to be an interface using the Wishbone protocol.
The operation request signal may be understood as a request signal generated by the master device requiring the slave device to operate, and the operation request signal may be a signal in a TileLink-UL a channel format received through an a channel of the master device. The slave device driving signal may be understood as a signal in the Wishbone protocol format that drives the slave device so that the slave device can perform a corresponding function. The first response driving signal may be understood as a signal of a TileLink-UL D channel format formed for feedback to the master device based on the operation request signal; for example, the first response driving signal may include a D-channel operation code signal (i.e., D _ opcode), a D-channel operation size signal (i.e., D _ size), and a D-channel master Identification (ID) signal (i.e., D _ source).
The reply signal may be understood as a signal in the Wishbone protocol format for informing the slave device that the operation request has been processed. The second reply drive signal may be understood as a signal in TileLink-UL D channel format determined based on the reply signal for feeding back the processing result to the master device.
Specifically, the conversion controller 13 may receive an operation request signal of the master device, and perform signal conversion processing on the operation request signal of the master device, to form a slave device driving signal in a Wishbone protocol format that can drive the slave device to respond to a corresponding function in the operation request signal, and to form a first response driving signal in a TileLink-UL D channel format and feed back the first response driving signal to the master device; and send a slave device drive signal to the slave device to activate the slave device to respond. And after receiving the response signal in the Wishbone protocol format fed back when the slave device completes processing, performing signal conversion processing on the response signal fed back by the slave device to form a second response driving signal in the TileLink-UL D channel format and feeding back the second response driving signal to the master device.
The technical scheme of the embodiment of the invention is that the TileLink-UL interface connected with at least one TileLink-UL main device and the Wishbone protocol interface connected with the Wishbone protocol slave device further comprise: a conversion controller; the switching controller is used for performing signal switching processing on the operation request signal in the TileLink-UL A channel format of the main equipment, forming a slave equipment driving signal in a Wishbone protocol format, sending the slave equipment driving signal to the slave equipment, forming a first response driving signal in the TileLink-UL D channel format, and feeding the first response driving signal back to the main equipment; and the response signal in the Wishbone protocol format fed back by the slave equipment is subjected to signal conversion processing to form a second response driving signal in the TileLink-UL D channel format and fed back to the master equipment. According to the technical scheme, the operation request signal of the TileLink-UL main equipment is converted into a slave equipment driving signal which can be responded by the Wishbone protocol slave equipment and a first response driving signal which responds to the D channel of the main equipment through the conversion controller, and then a response signal of the slave equipment is converted into a second response driving signal which responds to the D channel of the main equipment, so that the automatic conversion of communication signals between the main equipment and the slave equipment is realized, and the communication conversion and data interaction between the TileLink-UL main equipment and the Wishbone protocol slave equipment under the same position width are realized.
Optionally, the conversion controller 13 includes:
and the master signal receiving module is used for receiving the current operation request signal output from the master device input signal buffer area when the A-channel handshake signal of the master device is set high and the slave device is in an idle state.
In the present embodiment, set high can be understood as pulling a signal from low to high. Accordingly, being low can be understood as pulling a signal low from a high level to a low level. The idle state may be understood as a state in which other request processing is not currently performed (i.e., there is no operation request signal in other processing currently). The master input signal buffer may be understood as an area for storing a current operation request signal of the master.
It should be noted that the Tilelink-UL protocol may include an a channel and a D channel, that is, the main device using the Tilelink-UL protocol may perform signal transmission and reception through the a channel and the D channel of the Tilelink-UL protocol; the a channel may be used for signal transmission, and the D channel may be used for signal reception. When the current operation request signal of the master device is sent through the a-channel signal, the handshake signal (i.e., the a-channel handshake signal) in the a-channel interface signal is usually set high (i.e., a _ valid = 1) to indicate that there is the current operation request signal.
Specifically, the master signal receiving module may receive the current operation request signal output in the master input signal buffer when the a-channel handshake signal of the master is asserted and the slave is in an idle state. In order to avoid the loss of the current operation request signal, the main signal receiving module may further perform storage processing on the current operation request signal.
For example, the a channel interface signal of the communication protocol Tilelink-UL of the master device may include: a _ opcode, a _ param, a _ size, a _ source (ID of master), a _ address, a _ mask, a _ data, a _ corrupt, a _ valid, and a _ ready.
The D channel interface signal of the communication protocol Tilelink-UL of the master device may include: d _ opcode, d _ param, d _ size, d _ source (ID of master), d _ sink (ID of slave), d _ data, d _ corrupt (data exception), d _ denied, d _ valid, and d _ ready.
The Wishbone interface signal of the slave device may include: cyc (bus cycle signal), stb (strobe signal), we (write enable signal), sel (byte select signal), addr (address), data _ wr (output data), data _ rd (read data), ack (operation success signal), and err (operation failure signal).
And the main signal processing module is used for processing the current operation request signal according to a preset co-location width mapping information table when the data of the current operation request signal is correct and the slave device is in an idle state, obtaining a corresponding slave device driving signal and a first response driving signal, and feeding the first response driving signal back to the main device through a TiLELink-UL interface.
In this embodiment, a _ corrupt =0 in the current operation request signal may indicate that the data of the current operation request signal is error-free. The same-bit-width mapping information table may be understood as a preset mapping table for determining a signal value when the master device and the slave device have the same data bit width.
Specifically, the master signal processing module may determine, from a preset co-located width mapping information table, mapping values corresponding to signals included in the current operation request signal when data of the current operation request signal is error-free and the slave device is in an idle state, and may further obtain, according to the mapping values, a slave device driving signal and a first response driving signal corresponding to the current operation request signal, and feed the first response driving signal back to the master device through the TileLink-UL interface.
The slave driving signals may include we, sel, addr, cyc, and stb, among others.
For example, the same-bit-width mapping information table may be given, as shown in table 1, where a _ opcode =4 in table 1 corresponds to a GET operation (i.e., a read operation, which indicates an operation of reading data), a _ opcode =0 corresponds to a PullFullData operation, and a _ opcode =1 corresponds to a PullPartialData operation; the PullFullData operation and the PullPartialData operation are write operations, i.e., operations that represent writing data. Operation C may represent a custom translation of the signal, which is related to a specific application scenario. For example: the address space code used in the module a is 0x00 to 0xff, but the address space code allocated to the module a on the chip integrated with the module a is 0x1000 to 0x10ff, then the conversion mode C may be C (a _ address) = a _ address-0x1000.A | | B may represent a logical or of signal a and signal B. The error detection module can be used for checking whether the response data of the TileLink is in error or not, and is not an essential module.
TABLE 1 table of parity width mapping information
And the slave signal sending module is used for storing the slave device driving signal into a slave device output signal buffer, and sending the slave device driving signal to the slave device through the Wishbone protocol interface 12.
In the present embodiment, the slave device output signal buffer may be understood as an area for storing the slave device driving signal. Specifically, the slave signal transmission module may store the slave device driving signal in a slave device output signal buffer, and transmit the slave device driving signal to the slave device through the Wishbone protocol interface 12.
And the slave signal processing module is used for receiving the response signal fed back by the slave equipment and input from the equipment input signal buffer area, and carrying out signal conversion processing on the response signal fed back by the slave equipment according to the same-bit width mapping information table when the operation success signal of the slave equipment is set to be high, so as to form a second response driving signal.
Specifically, the slave signal processing module may receive a response signal fed back from the device, which is input from the device input signal buffer; and when the operation success signal of the slave device is set to be high (i.e. ack = 1), the value corresponding to the slave device response signal may be determined according to the rule corresponding to each entry in the same bit width mapping information table, and the value corresponding to the slave device response signal and the mapping entry may be used as the second response driving signal. The second response driving signal may include d _ data and its corresponding mapped value (data _ rd), d _ corrupt and its corresponding mapped value (0 or the output of the error detection module), and d _ distorted and its corresponding mapped value (err).
And the main signal sending module is used for storing the second response driving signal to the output signal buffer area of the main equipment and feeding back the second response driving signal to the main equipment through the TileLink-UL interface 11 when the D channel handshake signal of the main equipment is set to be high.
In this embodiment, the master signal sending module may store the second response driving signal in the master device output signal buffer, determine whether the master device sets the handshake signal of the D channel high, and feed back the response driving signal to the master device through the TileLink-UL interface 11 when the handshake signal of the D channel of the master device is set high (i.e., D _ valid = 1).
Optionally, the main signal processing module includes:
a type determining unit, configured to analyze an operation type to which a current operation request signal belongs, and determine a signal conversion mapping area corresponding to the current operation request signal according to the same-bit-width mapping information table and the operation type, where the operation type includes: a read operation and a write operation.
In this embodiment, the operation type may be understood as a classification of a type in which the master device needs the slave device to perform an operation, and may include: a read operation and a write operation. The signal conversion mapping region may be understood as a region of the parity width mapping information table indicating a signal mapping corresponding to a read operation or a write operation. It can be understood that the signal conversion mapping region corresponding to the read operation is different from the signal conversion mapping region corresponding to the write operation. As shown in table 1, the signal conversion mapping region corresponding to the read operation may be a region formed by the first column and the second column of table 1; the signal conversion mapping region corresponding to the write operation may be a region formed by the first column, the third column, and the fourth column of table 1.
Specifically, the type determining unit may determine the operation type to which the operation request signal belongs according to a value of an operation code signal (i.e., a _ opcode) included in the current operation request signal, such as a read operation type when a _ opcode = 4; when a _ opcode =0 or 1, it corresponds to a write operation type. And according to the same-bit-width mapping information table, determining a corresponding signal conversion mapping area under the operation type.
And the first conversion unit is used for converting the current operation request signal to form a slave driving signal and a first response driving signal based on a first signal conversion mapping area corresponding to the read operation when the operation type of the current operation request signal is the read operation.
In this embodiment, the first converting unit may perform signal conversion on the current operation request signal according to the signal conversion mapping region corresponding to the read operation when the operation type in the parity width mapping information table is the read operation, so as to form the corresponding slave device driving signal and the first response driving signal.
And a second conversion unit for converting the current operation request signal to form the slave driving signal and the first response driving signal based on a second signal conversion mapping region corresponding to the write operation when the operation type of the current operation request signal is the write operation.
In this embodiment, the second converting unit may perform signal conversion on the current operation request signal according to the signal conversion mapping region corresponding to the write operation when the operation type in the same-bit-width mapping information table is the write operation, so as to form a corresponding slave device driving signal and the first response driving signal.
And the signal sending unit is used for feeding back the first response driving signal to the main equipment through the TileLink-UL interface 11.
Optionally, the first conversion unit is specifically configured to:
determining a corresponding first slave device driving item and a first D channel signal item under the type of read operation;
determining a first slave device driving value corresponding to each first slave device driving item and a first D channel signal value corresponding to each first D channel signal item from the first signal conversion mapping area;
taking each first slave device driving item and the corresponding first slave device driving value thereof as a slave device driving signal;
and taking each first D channel signal item and the corresponding first D channel signal value as a first response driving signal.
In this embodiment, the first slave device driving item may be understood as a signal item for driving the slave device to complete the operation request under the read operation; such as we signal terms, sel signal terms, addr signal terms, cyc signal terms, and stb signal terms. The first slave device driving value may be understood as a mapping value corresponding to the first slave device driving item in the first signal conversion mapping area of the mapping information table; for example, the we signal entry corresponds to a mapping value of 0.
The first D-channel signal item may be understood as a signal item for D-channel signal driving under a read operation; such as d _ opcode signal item, d _ size signal item, and d _ source signal item. The first D-channel signal value may be understood as a mapping value corresponding to the first D-channel signal item in the first signal conversion mapping region of the mapping information table; for example, the mapping value corresponding to the d _ opcode signal entry is 1.
The first conversion unit may determine, in a first signal conversion mapping area of the mapping information table, a first slave device driving value corresponding to each first slave device driving item and a first D-channel signal value corresponding to each first D-channel signal item under a read operation in a table look-up manner, so as to use each first slave device driving item and its corresponding first slave device driving value as a slave device driving signal; and taking each first D-channel signal item and the corresponding first D-channel signal value as a first response driving signal.
Optionally, the second conversion unit is specifically configured to:
determining a corresponding second slave device driving item and a corresponding second D channel signal item under the write operation type;
determining a second slave device driving value corresponding to each second slave device driving item and a second D channel signal value corresponding to each second D channel signal item from the second signal conversion mapping area;
taking each second slave device driving item and the corresponding second slave device driving value thereof as a slave device driving signal;
and taking each second D-channel signal item and the corresponding second D-channel signal value as a first response driving signal.
In the present embodiment, the second slave device driving item may be understood as a signal item for driving the slave device to complete the operation request under the write operation; such as we signal terms, sel signal terms, addr signal terms, data _ wr signal terms, cyc signal terms, and stb signal terms. The second slave device driving value may be understood as a mapping value corresponding to the second slave device driving item in the second signal conversion mapping region of the mapping information table; for example, we signal entry corresponds to a mapping value of 1.
The second D-channel signal item may be understood as a signal item for D-channel signal driving in the write operation; such as d _ opcode signal item, d _ size signal item, and d _ source signal item. The second D-channel signal value may be understood as a mapping value corresponding to the second D-channel signal item in the second signal conversion mapping region of the mapping information table; for example, the mapping value corresponding to the d _ opcode signal item is 0.
The second converting unit may determine, in a second signal conversion mapping area of the mapping information table, a second slave device driving value corresponding to each second slave device driving item and a second D-channel signal value corresponding to each second D-channel signal item under the write operation in a form of table lookup, so as to use each second slave device driving item and its corresponding second slave device driving value as a slave device driving signal; and taking each second D-channel signal item and the corresponding second D-channel signal value thereof as a first response driving signal.
Optionally, the slave signal processing module includes:
and the reading processing unit is used for receiving a reading processing response signal fed back by the slave device and performing signal conversion processing on the reading processing response signal according to the same bit width mapping information table to obtain a D channel data signal, a first D channel data abnormal signal and a first D channel access rejection signal to serve as a second response driving signal if the slave device driving signal sent to the slave device is used for reading processing.
In this embodiment, the read process may be understood as a process of reading data corresponding to a read operation. A read processing response signal is understood to mean a read processing corresponding response signal. The D-channel data signal may be a D _ data signal under a read process. The first D-channel data exception signal may be understood as a D _ corrupt signal under read processing. The first D-channel access denied signal may be understood as a D _ trusted signal under read processing.
Specifically, if the slave device driving signal sent to the slave device is used for read processing, the read processing unit may drive the output signal of the D channel at the TileLink-UL interface end after receiving a read processing response signal fed back after the slave device completes response, and perform conversion processing on the result after the read processing of the slave device according to a rule corresponding to each entry in the same-bit width mapping information table to obtain a D channel data signal, a first D channel data exception signal, and a first D channel access rejection signal, which are used as the second response driving signal. For example, the D-channel data signal includes a D _ data signal item and a corresponding mapping value data _ rd.
Optionally, the slave signal processing module further includes:
and the write processing unit is used for receiving a write processing response signal fed back by the slave device and performing signal conversion processing on the write processing response signal according to the same-bit-width mapping information table to obtain a second D channel data abnormal signal and a second D channel access rejection signal to serve as a second response driving signal if the slave device driving signal sent to the slave device is used for write processing.
In this embodiment, the write processing may be understood as processing of write data corresponding to a write operation. A write processing response signal is understood to be a response signal corresponding to a write processing. The second D-channel data exception signal may be understood as a D _ corrupt signal under write processing. The second D-channel access denied signal may be understood as a D _ trusted signal under write processing.
Specifically, if the slave device driving signal sent to the slave device is used for write processing, the write processing unit may drive the output signal of the D channel at the TileLink-UL interface end after receiving a write processing response signal fed back after the slave device completes response, and perform conversion processing on the result after write processing of the slave device according to a rule corresponding to each entry in the same-bit width mapping information table, to obtain a second D channel data exception signal and a second D channel access rejection signal, which are used as second response driving signals. For example, the second D-channel data exception signal includes a D _ corrupt signal entry and a corresponding mapping value of 0.
Optionally, the conversion controller further includes:
the signal rejection processing module is used for determining a rejection D-channel signal item corresponding to the current operation request signal when the data of the current operation request signal is wrong and/or the slave device is in a non-idle state;
the signal rejection processing module is further configured to query a rejection D channel signal value corresponding to the rejection D channel signal item from the parity width mapping information table, use the rejection D channel signal item and the rejection D channel signal value corresponding to the rejection D channel signal item as a rejection response driving signal in a TileLink-UL D channel format corresponding to the current operation request signal, and send the rejection response driving signal to the main signal sending module.
In the present embodiment, a _ corrupt =1 in the current operation request signal may indicate that the data of the current operation request signal is erroneous. The non-idle state may be understood as a state in which there are currently other requests to process. The reject D-channel signal item may be understood as a D-channel signal item for informing the master device of the rejection of the operation request signal. Optionally, rejecting the D-channel signal item may include: a D-channel operation code signal item (i.e., D _ opcode signal item), a D-channel operation size signal item (i.e., D _ size signal item), a D-channel master ID signal item (i.e., D _ source signal item), a D-channel data exception signal item (i.e., D _ corrupt signal item), and a D-channel access rejection signal item (i.e., D _ distorted signal item). The rejected D-channel signal value can be understood as a mapping value corresponding to the rejected D-channel signal entry in the parity width mapping information table. The rejection response driving signal may be understood as a driving signal for informing the master device of rejection of the operation request signal.
Specifically, when the data of the received operation request signal is incorrect and/or the slave device is in a non-idle state, the signal rejection processing module may determine a rejection D-channel signal item corresponding to the current operation request signal, query a rejection D-channel signal value corresponding to the rejection D-channel signal item from the parity width mapping information table, use the determined rejection D-channel signal item and the corresponding rejection D-channel signal value as a rejection response driving signal in a TileLink-UL D channel format corresponding to the current operation request signal, and send the rejection response driving signal to the master signal sending module.
In this embodiment, a set co-located width mapping information table provides support for signal conversion between the master device and the slave device, thereby realizing automatic conversion between a master device signal and a slave device signal, realizing data interaction between the master device and the slave device with different communication protocols, and satisfying the response of diversified requirements of the master device.
Illustratively, following the notation in the above exemplary description, when a _ corrupt =0 (i.e. the operation request signal sent by the master device is error-free), the implementation process of the present application is exemplarily described in the case that the current operation request information type of the master device is a read/write operation through a time sequence form (d _ param, d _ sink may be fixed to a fixed value, and do not participate in the mapping determination process of the driving signal).
Fig. 2 is a schematic diagram illustrating an implementation of a read/write operation timing control of a communication conversion apparatus when an operation request signal is error-free according to an embodiment of the present invention. As shown in fig. 2, clock represents a clock signal, and in the case where the master device transmits data without error (i.e., a _ corrupt = 0), the timing waveform diagram is as follows. Where a _ indicates all signals remaining in the a channel except the a channel signal shown in fig. 2, D _ indicates all signals remaining in the D channel except the D channel signal shown in fig. 2, WB _ out indicates all output signals remaining in the slave (Wishbone terminal, hereinafter abbreviated as WB terminal) except the WB terminal signal shown in fig. 2, and WB _ in indicates all input signals remaining in the slave (Wishbone terminal, hereinafter abbreviated as WB terminal) except the WB terminal signal shown in fig. 2. The double dotted line represents a plurality of clock cycles (the minimum consumption can be 0 cycle) consumed by the process of waiting for the master device to receive the response, wherein the double dotted line 1 represents the processing process after the conversion controller receives the master device request; the double dashed line 2 represents the processing of the slave device; the double dashed line 3 represents the processing after the conversion controller receives the slave answer; the double dashed line 4 indicates that the switch controller waits for the master to receive an acknowledgement.
When the operation type of the operation request signal is read, when an operation request signal of the master device is received (a _ valid =1, that is, when an a _ valid item is high in the figure) and other request processing is not performed, signals d _ opcode, d _ size, d _ source, we, sel and addr are driven according to a corresponding rule in the parity width mapping information table, and a _ ready indicates that a request is received; pulling cyc and stb high (i.e., cyc =1 and stb = 1) to activate the slave device, determining d _ data, d _ corrupt and d _ dense according to the mapping rule corresponding to each entry in the mapping information table when the slave device replies (ack = 1), and pulling cyc and stb low (i.e., cyc =0 and stb = 0) to turn off the slave device. Feeding back the determined D channel signal to the main equipment through a TileLink-UL interface, raising D _ valid to represent a response to the main equipment request, and when the main equipment receives the response (D _ ready = 1), representing that the request is completed.
When the operation type of the operation request signal is write operation, when an operation request signal of the master device is received (a _ valid =1, that is, when an a _ valid item is high in the figure) and other request processing is not performed, signals d _ opcode, d _ size, d _ source, we, sel, addr and data _ wr can be driven according to a corresponding rule in the parity width mapping information table, and the increase a _ ready indicates that the request is received; pulling cyc and stb high (i.e., cyc =1 and stb = 1) to activate the slave device, and when the slave device replies (ack = 1), determining d _ corrupt and d _ dense according to the mapping rule corresponding to each entry in the mapping information table, and pulling cyc and stb low (i.e., cyc =0 and stb = 0) to turn off the slave device. Feeding back the determined D channel signal to the main equipment through a TileLink-UL interface, raising D _ valid to represent a response to the main equipment request, and when the main equipment receives the response (D _ ready = 1), representing that the request is completed.
Illustratively, following the notation in the above exemplary description, in the case that the master device sends data in a time sequence form with an error (the data error can be determined by a _ correct = 1), the implementation process of the present application is exemplarily described (d _ param, d _ sink can be fixed to a fixed value, and do not participate in the slave device driving signal obtaining process).
Fig. 3 is a schematic diagram illustrating an implementation of a read/write operation timing control of a communication conversion apparatus according to an embodiment of the present invention when an operation request signal is faulty. As shown in fig. 3, clock represents a clock signal, double dotted lines represent a number of clock cycles (minimum consumption may be 0 cycles) consumed by the process of waiting for the master to receive a response, when an operation request signal (a _ valid =1, i.e. when a _ valid item is high in the figure) of the master is received and no other request processing is performed, D channel signals D _ opcode, D _ size, D _ source, D _ corrupt and D _ dense (e.g. D _ opcode =4, 0 or 1, D _ size = a _ size, D _ source = a _ source, D _ data may be arbitrary, D _ corrupt =0, D _ dense = 1) are first driven according to the corresponding mapping relationship in the parity width mapping information table (D _ opcode =4, 0 or 1); and raising a _ ready indicates that a request has been received; then, raising d _ valid (i.e., d _ valid = 1) indicates a response to the request of the master device, and when the master device receives the response (i.e., d _ ready = 1), indicates that the request is completed (i.e., rejected).
Example two
Fig. 4 is a schematic flowchart of a communication conversion method for communication between a master device and a slave device according to a second embodiment of the present invention, where the method is applicable to a communication conversion apparatus for communication between a master device and a slave device, and the communication conversion apparatus for communication between a master device and a slave device includes: the system comprises a TileLink-UL interface connected with at least one TileLink-UL main device, a Wishbone protocol interface connected with Wishbone protocol slave devices and a conversion controller. As shown in fig. 4, the method includes:
s210, performing signal conversion processing on the operation request signal in the TileLink-UL A channel format of the main device through the conversion controller, forming a slave device driving signal in a Wishbone protocol format, sending the slave device driving signal to the slave device, forming a first response driving signal in the TileLink-UL D channel format, and feeding the first response driving signal back to the main device.
And S220, performing signal conversion processing on the response signal in the Wishbone protocol format fed back by the slave device through the conversion controller to form a second response driving signal in the TileLink-UL D channel format and feeding the second response driving signal back to the master device.
The embodiment provides a communication conversion method for communication between master equipment and slave equipment, which comprises the following steps: the TileLink-UL interface connected with at least one TileLink-UL main device and the Wishbone protocol interface connected with Wishbone protocol slave device further comprise: a conversion controller; performing signal conversion processing on an operation request signal in a TileLink-UL A channel format of the main equipment through a conversion controller to form a slave equipment driving signal in a Wishbone protocol format, sending the slave equipment driving signal to the slave equipment, and forming a first response driving signal in a TileLink-UL D channel format, and feeding the first response driving signal back to the main equipment; and performing signal conversion processing on the response signal in the Wishbone protocol format fed back by the slave equipment through the conversion controller to form a second response driving signal in a TileLink-UL D channel format and feed back the second response driving signal to the master equipment. According to the technical scheme, the operation request signal of the TileLink-UL main equipment is converted into a slave equipment driving signal which can be responded by the Wishbone protocol slave equipment and a first response driving signal which responds to the D channel of the main equipment through the conversion controller, and then a response signal of the slave equipment is converted into a second response driving signal which responds to the D channel of the main equipment, so that the automatic conversion of communication signals between the main equipment and the slave equipment is realized, and the communication conversion and data interaction between the TileLink-UL main equipment and the Wishbone protocol slave equipment under the same position width are realized.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A communication switching apparatus for communication between a master device and a slave device, comprising: the TileLink-UL interface connected with at least one TileLink non-cache lightweight sub-protocol TileLink-UL main device and the Wishbone protocol interface connected with the Wishbone protocol slave device further comprise: a conversion controller;
the conversion controller is used for performing signal conversion processing on the operation request signal in the TileLink-UL A channel format of the main equipment, forming a slave equipment driving signal in a Wishbone protocol format, sending the slave equipment driving signal to the slave equipment, forming a first response driving signal in the TileLink-UL D channel format, and feeding the first response driving signal back to the main equipment; and the slave device is further configured to perform signal conversion processing on the response signal in the Wishbone protocol format fed back by the slave device, form a second response driving signal in the TileLink-UL D channel format, and feed back the second response driving signal to the master device.
2. The apparatus of claim 1, wherein the conversion controller comprises:
the master signal receiving module is used for receiving a current operation request signal output from a master device input signal buffer area when an A channel handshake signal of the master device is set high and the slave device is in an idle state;
a master signal processing module, configured to process the current operation request signal according to a preset mapping information table of parity width when data of the current operation request signal is error-free and the slave device is in an idle state, obtain a corresponding slave device driving signal and a first response driving signal, and feed back the first response driving signal to the master device through the TileLink-UL interface;
a slave signal sending module, configured to store the slave device driving signal in a slave device output signal buffer, and send the slave device driving signal to the slave device through the Wishbone protocol interface;
the slave signal processing module is used for receiving a response signal fed back by slave equipment and input from the equipment input signal buffer area, and when the operation success signal of the slave equipment is set to be high, performing signal conversion processing on the response signal fed back by the slave equipment according to the same-bit width mapping information table to form a second response driving signal;
and the main signal sending module is used for storing the second response driving signal to a main equipment output signal buffer area and feeding back the second response driving signal to the main equipment through the TileLink-UL interface when a D channel handshake signal of the main equipment is set to be high.
3. The apparatus of claim 2, wherein the main signal processing module comprises:
a type determining unit, configured to analyze an operation type to which the current operation request signal belongs, and determine, according to the same-bit width mapping information table and the operation type, a signal conversion mapping area corresponding to the current operation request signal, where the operation type includes: a read operation and a write operation;
and the first conversion unit is used for converting the current operation request signal to form the slave device driving signal and the first response driving signal based on a first signal conversion mapping area corresponding to the read operation when the operation type of the current operation request signal is the read operation.
A second conversion unit, configured to, when the operation type of the current operation request signal is a write operation, convert the current operation request signal into the slave device driving signal and a first response driving signal based on a second signal conversion mapping region corresponding to the write operation;
and the signal sending unit is used for feeding back the first response driving signal to the main equipment through the TileLink-UL interface.
4. The apparatus according to claim 3, wherein the first conversion unit is specifically configured to:
determining a corresponding first slave device driving item and a corresponding first D-channel signal item under the read operation type;
determining a first slave device driving value corresponding to each first slave device driving item and a first D channel signal value corresponding to each first D channel signal item from the first signal conversion mapping area;
taking each first slave device driving item and the corresponding first slave device driving value thereof as a slave device driving signal;
and taking each first D-channel signal item and the corresponding first D-channel signal value as a first response driving signal.
5. The apparatus according to claim 3, wherein the second conversion unit is specifically configured to:
determining a corresponding second slave device driving item and a corresponding second D channel signal item under the write operation type;
determining a second slave device driving value corresponding to each second slave device driving item and a second D channel signal value corresponding to each second D channel signal item from the second signal conversion mapping region;
taking each second slave device driving item and the corresponding second slave device driving value as a slave device driving signal;
and taking each second D-channel signal item and the corresponding second D-channel signal value as a first response driving signal.
6. The apparatus of claim 3, wherein the slave signal processing module comprises:
and the read processing unit is used for receiving a read processing response signal fed back by the slave device and performing signal conversion processing on the read processing response signal according to the same-bit-width mapping information table to obtain a D channel data signal, a first D channel data abnormal signal and a first D channel access rejection signal to serve as a second response driving signal if the slave device driving signal sent to the slave device is used for read processing.
7. The apparatus of claim 3, wherein the slave signal processing module further comprises:
and the write processing unit is used for receiving a write processing response signal fed back by the slave device if the slave device driving signal sent to the slave device is used for write processing, and performing signal conversion processing on the write processing response signal according to the same-bit width mapping information table to obtain a second D channel data abnormal signal and a second D channel access rejection signal to serve as a second response driving signal.
8. The apparatus of claim 2, wherein the conversion controller further comprises:
the signal rejection processing module is used for determining a rejection D-channel signal item corresponding to the current operation request signal when the data of the current operation request signal is wrong and/or the slave device is in a non-idle state;
and the signal rejection processing module is further configured to query a rejection D-channel signal value corresponding to the rejection D-channel signal item from the same-bit width mapping information table, use the rejection D-channel signal item and the rejection D-channel signal value corresponding to the rejection D-channel signal item as a rejection response driving signal in a TileLink-UL D-channel format corresponding to the current operation request signal, and send the rejection response driving signal to the main signal sending module.
9. The apparatus of claim 8, wherein rejecting D-channel signal items comprises: the device comprises a D channel operation code signal item, a D channel operation size signal item, a D channel main device Identification (ID) signal item, a D channel data exception signal item and a D channel access rejection signal item.
10. A communication conversion method for communication between a master device and a slave device is characterized in that the communication conversion method is applied to a communication conversion device for communication between the master device and the slave device, and the communication conversion device for communication between the master device and the slave device comprises the following steps: the method comprises the following steps of connecting a TiLELink-UL interface of at least one TiLELink-UL main device, connecting a Wishbone protocol interface of a Wishbone protocol slave device and a conversion controller, wherein the method comprises the following steps:
performing signal conversion processing on the operation request signal in the TileLink-UL A channel format of the main equipment through the conversion controller to form a slave equipment driving signal in a Wishbone protocol format, sending the slave equipment driving signal to the slave equipment, and forming a first response driving signal in the TileLink-UL D channel format and feeding the first response driving signal back to the main equipment;
and performing signal conversion processing on the response signal in the Wishbone protocol format fed back by the slave equipment through the conversion controller to form a second response driving signal in a TileLink-UL D channel format and feed back the second response driving signal to the master equipment.
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