XS7_Assembler.cpp

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/******************************************************************************
 * Copyright 2022 Kristiyan Manev (University of Manchester)
 *
 * Licensed under the Apache License, Version 2.0(the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *****************************************************************************/
 
#include<iostream>
#include<algorithm> //replace
#include<string>
#include<stdexcept>
#include<fstream>
#include<cstring>
#include<iomanip>//setfill, setw
 
#include "XilinxSeries7.h"
#include "../../../Common/FileIO.h"
#include "../../../Common/str.h"
#include "../../../Common/Endianness.h"
 
using namespace std;
 
void XilinxSeries7::assembler(string filenameIn, string filenameOut)
{
    enum FILEFORMAT {FILE_NULL = 0, FILE_BIT, FILE_BIN, FILE_BIT_ASM};
    FILEFORMAT fileformatIn = FILE_NULL, fileformatOut = FILE_NULL;
    
    if(str::iff::stringEndsWith(filenameIn, ".bit"))
        fileformatIn = FILE_BIT;
    if(str::iff::stringEndsWith(filenameIn, ".bin"))
        fileformatIn = FILE_BIN;
    if(str::iff::stringEndsWith(filenameIn, ".bitasm"))
        fileformatIn = FILE_BIT_ASM;
    if(str::iff::stringEndsWith(filenameOut, ".bit"))
        fileformatOut = FILE_BIT;
    if(str::iff::stringEndsWith(filenameOut, ".bin"))
        fileformatOut = FILE_BIN;
    if(str::iff::stringEndsWith(filenameOut, ".bitasm"))
        fileformatOut = FILE_BIT_ASM;
    
    ifstream fin (filenameIn, ifstream::binary);
    if(!fin.good())
        throw runtime_error(string("Could not open file: \"").append(filenameIn).append("\" .\n"));
    
    ofstream fout (filenameOut, ofstream::binary | ofstream::trunc);
    if(!fout.good())
        throw runtime_error(string("Could not open file: \"").append(filenameOut).append("\"!\n"));
    
    if(fileformatIn == FILE_BIT && fileformatOut == FILE_BIT_ASM)
        disassemblerBitToAsm(fin, fout);
    else if(fileformatIn == FILE_BIN && fileformatOut == FILE_BIT_ASM)
        disassemblerBinToAsm(filenameIn, fin, fout);
    else if(fileformatIn == FILE_BIT_ASM && fileformatOut == FILE_BIT)
        assemblerAsmToBit(fin, fout);
    else if(fileformatIn == FILE_BIT_ASM && fileformatOut == FILE_BIN)
        assemblerAsmToBin(fin, fout);
    else
        throw runtime_error(string("Unknown Xilinx Series 7 assembler operation between file formats. See \"byteman -h assembly\".\n"));
    fin.close();
    fout.close();
}
 
void XilinxSeries7::disassemblerBinToAsm(string filenameIn, ifstream& fin, ofstream& fout) {
    loadedBitstreamEndianness = parseBitstreamEndianness(fin);
    uint32_t idcode = parseBitstreamIDCODE(fin, loadedBitstreamEndianness);
    setDeviceByIDCODEOrThrow(idcode);
    designName = filenameIn;
    updateDateAndTime();
    
    disassemblerToAsm(fin, fout);
}
 
void XilinxSeries7::disassemblerBitToAsm(ifstream& fin, ofstream& fout) {
    loadedBitstreamEndianness = parseBitstreamEndianness(fin);
    parseBITheader(fin, loadedBitstreamEndianness);
    setDeviceByPartNameOrThrow();
    
    disassemblerToAsm(fin, fout);
}
void XilinxSeries7::assemblerAsmToBit(ifstream& fin, ofstream& fout){
    assemblerParseHeader(fin);
    
    setDeviceByPartNameOrThrow();
    initializeResourceStringParameters();
    outputBITheader(fout, loadedBitstreamEndianness);
    
    assemblerAsmTo(fin, fout);
}
void XilinxSeries7::assemblerAsmToBin(ifstream& fin, ofstream& fout){
    assemblerParseHeader(fin);
    
    setDeviceByPartNameOrThrow();
    initializeResourceStringParameters();
    
    assemblerAsmTo(fin, fout);
}
 
void XilinxSeries7::assemblerParseHeader(ifstream& fin)
{
    for (string line; getline(fin, line); ) {
        auto firstEqPos = line.find_first_of('=');
        if(firstEqPos != string::npos)
            line.replace(firstEqPos, 1, '=',' ');
        
        if(str::iff::stringContains(line, "Name"))designName = str::parse::lastStringWord(line);
        if(str::iff::stringContains(line, "FPGA"))partName = str::parse::lastStringWord(line);
        if(str::iff::stringContains(line, "Date"))fileDate = str::parse::lastStringWord(line);
        if(str::iff::stringContains(line, "Time"))fileTime = str::parse::lastStringWord(line);
        if(str::iff::stringContains(line, "HEADER END"))break;
    }
    log("Design name: " + designName);
    log("FPGA: " + partName);
    log("Date: " + fileDate);
    log("Time: " + fileTime);
}
void XilinxSeries7::assemblerAsmTo(ifstream& fin, ofstream& fout)
{
    outputCAPheaderConstant(fout, loadedBitstreamEndianness);
    
    XCAP::Register regAddr = XCAP::Register::UNDEFINED;
    int frameCount = 0;
    int slr = 0, b = 7, r = 0, c = 0, m = 0;
    for (string line; getline(fin, line); ) {
        if(line.at(line.find_first_not_of(" \t")) == '#')// if #, skip that line as comment
            continue;
        transform(line.begin(), line.end(), line.begin(), ::toupper);
        replace(line.begin(), line.end(), '=',' ');
        replace(line.begin(), line.end(), '#',' ');
        replace(line.begin(), line.end(), ',', ' ');
        if(str::iff::stringContains(line, "SYNC") && (!str::iff::stringContains(line, "DESYNC"))){
            XCAP_writeSYNQ(fout, loadedBitstreamEndianness);
        }
        else if(str::iff::stringContains(line, ".WORD")){
            uint32_t wordValue;
            if(!str::parse::multipleUints(line, wordValue))wordValue = 0;
            FileIO::write32(fout, wordValue, loadedBitstreamEndianness);
        }
        else if(str::iff::stringContains(line, ".BYTE")){
            uint32_t value;
            if(!str::parse::multipleUints(line, value))value = 0;
            uint32_t byteValue = value % 256;
            FileIO::write8(fout, byteValue, loadedBitstreamEndianness);
        }
        else if(str::iff::stringContains(line, "NOP")){
            int nopHiddenValue;
            if(!str::parse::multipleInts(line, nopHiddenValue))nopHiddenValue = 0;
            XCAP_writeNOP(fout, 1, nopHiddenValue, loadedBitstreamEndianness);
        }
        else if(str::iff::stringContains(line, "RESERVED")){
            int reservedHiddenValue;
            if(!str::parse::multipleInts(line, reservedHiddenValue))reservedHiddenValue = 0;
            XCAP_writeRESERVED(fout, 1, reservedHiddenValue, loadedBitstreamEndianness);
        }
        else if(str::iff::stringContains(line, "SELECT NEXT SLR")){
            slr++;
            int magic1size;
            if(!str::parse::multipleInts(line, magic1size))magic1size = 0;
            XCAP_writeSelectRegister(fout, XCAP::Register::MAGIC1, loadedBitstreamEndianness);
            XCAP_writeType2(fout, magic1size, loadedBitstreamEndianness);
        }
        else if(str::iff::stringContains(line, "@")){
            XCAP::Register newRegAddr = getXCAPregister(line);
            if(str::iff::stringContains(line, "READ REG @")){
                int readLength;
                if(!str::parse::multipleInts(line, readLength)) readLength = 1; // default read length is 1 if unspecified
                XCAP_writeReadRegister(fout, newRegAddr, readLength, loadedBitstreamEndianness);
            } else {// must be a write then ¯\_(ツ)_/¯
            
                if(newRegAddr == XCAP::Register::UNDEFINED){
                    throw runtime_error(string("Couldn't parse assembly command: \"").append(line).append("\"!"));
                } else if(str::iff::stringContains(line, "SELECT REGISTER")){
                    XCAP_writeSelectRegister(fout, newRegAddr, loadedBitstreamEndianness);
                } else if(newRegAddr == XCAP::Register::FDRI){
                    if(!str::parse::multipleInts(line, frameCount))
                        throw runtime_error(string("FDRI command needs size: \"").append(line).append("\"!"));
                    int wordCount = frameCount * XS7_WORDS_PER_FRAME;
                    if(regAddr == XCAP::Register::FDRI) {
                        XCAP_writeType2(fout, wordCount, loadedBitstreamEndianness);
                    } else {
                        XCAP_writeFDRI1(fout, wordCount, loadedBitstreamEndianness);
                    }
                    if(frameCount > 0){
                        string frameLine;
                        for (string frameLine; getline(fin, frameLine); ) {
                            if(frameLine.at(frameLine.find_first_not_of(" \t")) == '#')// if #, skip that line as comment
                                continue;
                            uint32_t frameData[XS7_WORDS_PER_FRAME];
                            if(!str::parse::arrayOfUints(frameLine, XS7_WORDS_PER_FRAME, &frameData[0]))
                                throw runtime_error(string("Was expecting the data for a full frame on this line: \"").append(frameLine).append("\", because I think there are ").append(to_string(frameCount)).append(" frames left."));
                            //first 3 words are clk, next 90 are the 0-45 and 48-93 data words
                            for (int w = XS7_WORDS_AT_CLK; w < (XS7_WORDS_AT_CLK + XS7_WORDS_BEFORE_CLK) ; w++){
                                FileIO::write32(fout, frameData[w], loadedBitstreamEndianness);
                            }
                            for (int w = 0; w < XS7_WORDS_AT_CLK ; w++){
                                FileIO::write32(fout, frameData[w], loadedBitstreamEndianness);
                            }
                            for (int w = (XS7_WORDS_AT_CLK + XS7_WORDS_BEFORE_CLK); w < XS7_WORDS_PER_FRAME ; w++){
                                FileIO::write32(fout, frameData[w], loadedBitstreamEndianness);
                            }
                            
                            frameCount--;
                            if(frameCount == 0)
                                break;
                        }
                        if(frameCount != 0)
                            throw runtime_error(string("End of file reached while performing FDRI frame writes.!"));
                    }
                } else if(newRegAddr == XCAP::Register::FAR){
                    if(!str::parse::multipleInts(line, b, r, c, m))
                        throw runtime_error(string("Could not parse the new FAR value: \"").append(line).append("\"!"));
                    r += SLRinfo[slr].fromRow;
                    uint32_t farValue = XCAP_getFAR(slr, b, r, c, m);
                    XCAP_writeRegister(fout, XCAP::Register::FAR, farValue, loadedBitstreamEndianness);
                } else {
                    uint32_t newValue;
                    if(!str::parse::multipleUints(line, newValue))
                        throw runtime_error(string("Could not parse the new register value: \"").append(line).append("\"!"));
                    XCAP_writeRegister(fout, newRegAddr, newValue, loadedBitstreamEndianness);
                }
            }
            regAddr = newRegAddr;
        } else {// ! str::iff::stringContains(line, "@")
            //must have been a command then
            XCAP::Command cmdID = getXCAPcommand(line);
            if(cmdID == XCAP::Command::UNDEFINED)
                throw runtime_error(string("Couldn't parse assembly command: \"").append(line).append("\"!"));
            XCAP_writeCommand(fout, cmdID, loadedBitstreamEndianness);
        }
    }
    outputBITheaderLengthField(fout, loadedBitstreamEndianness);
}
 
void XilinxSeries7::disassemblerWriteHeader(ofstream& fout)
{
    fout << "--- HEADER BEGIN ---" << endl;
    fout << "Name = \"" << designName << "\"" << endl;
    fout << "FPGA = \"" << partName << "\"" << endl;
    fout << "Date = \"" << fileDate << "\"" << endl;
    fout << "Time = \"" << fileTime << "\"" << endl;
    fout << "--- HEADER END ---" << endl;
}
 
void XilinxSeries7::disassemblerToAsm(ifstream& fin, ofstream& fout) {
    initializeResourceStringParameters();
    disassemblerWriteHeader(fout);
    
    XCAP::Register regAddr = XCAP::Register::UNDEFINED;
    bool synched = false;
    bool aligned = false;
    int wordCount = 0;
    int shadowFrameValid = 0;
    int slr = 0, b = 7, r = 0, c = 0, m = 0;
    //Parse bitstream
    for( ; ; ){
        if(!fin.good()){
            break; // done with the bitstream
        } else {
            if(!synched){
                streamoff startFileOffset = fin.tellg();
                streamoff endFileOffset;
                if(!aligned){
                    if(findBitstreamSyncSequence(fin, loadedBitstreamEndianness)){
                        endFileOffset = fin.tellg() - (streamoff)4;
                        synched = true;
                        aligned = true;
                    } else {//end of bitstream
                        endFileOffset = fin.tellg();
                    }
                } else { //already aligned
                    if(findBitstreamSyncWord(fin, loadedBitstreamEndianness)){
                        endFileOffset = fin.tellg() - (streamoff)4;
                        synched = true;
                    } else {//end of bitstream
                        endFileOffset = fin.tellg();
                    }
                }
                fin.seekg(startFileOffset, fin.beg);
                assemblyOutputData(fin, fout, (endFileOffset - startFileOffset));
                if(synched){
                    FileIO::read32(fin);//discard sync command
                    fout << "SYNC" << endl;
                } else {
                    break; //if still not synched, then we reached end of file
                }
            } else {
                uint32_t instruction = FileIO::read32(fin, loadedBitstreamEndianness);
                int instructionType = XCAP_getInstructionType(instruction);
                XCAP::Operation instructionOPCODE = XCAP_getInstructionOperation(instruction);
                int instructionPayload = XCAP_getInstructionPayload(instruction);
                if(instructionType == 1) {
                    wordCount = XCAP_getInstructionWordCount(instruction);
                    regAddr = XCAP_getInstructionRegister(instruction);
                } else if(instructionType == 2) {
                    wordCount = instructionPayload;
                } else {
                    fout << "0x" << uppercase << hex << setw(8) << setfill('0') << instruction << " (Invalid instruction [invalid type])" << endl;
                    continue;
                }
                
                if(instructionOPCODE == XCAP::Operation::NOP) {
                    if(instructionPayload != 0)
                        fout << "NOP #" << instructionPayload << endl;
                    else
                        fout << "NOP" << endl;
                } else if(instructionOPCODE == XCAP::Operation::RESERVED) {
                    if(instructionPayload != 0)
                        fout << "RESERVED #" << instructionPayload << endl;
                    else
                        fout << "RESERVED" << endl;
                } else if(instructionOPCODE == XCAP::Operation::READ) {
                    fout << "Read Reg @";
                    writeXCAPregisterName(fout, regAddr);
                    fout << " for length #" << wordCount << endl;
                } else { // XCAP::Operation::WRITE
                    if((regAddr == XCAP::Register::FDRI) && (wordCount > 0) && (wordCount % XS7_WORDS_PER_FRAME == 0)) {
                        if(shadowFrameValid) {
                            fout << dec << "# Shadow register contents are written to frame (BlockType=" << b << ", GlobalRowAddress=" << r << ", MajorAddress=" << c << ", MinorAddress=" << m << ") (Frame type: " << getFrameType(b, r, c) << ")." << endl;
                            XCAP_IncrementFAR(slr, b, r, c, m);
                        }
                        shadowFrameValid = 1;
                        int frameCount = (wordCount/XS7_WORDS_PER_FRAME);
                        fout << dec << "@FDRI for #" << frameCount << " frames:" << endl;
                        for(int i = 0 ; i < frameCount ; i++){
                            fout << "# ";
                            if(i == (frameCount-1)) fout << "(This frame data is written to shadow register!)";
                            fout << dec << "Writing frame #" << i << " (BlockType=" << b << ", GlobalRowAddress=" << r << ", MajorAddress=" << c << ", MinorAddress=" << m << ") (Frame type: " << getFrameType(b, r, c) << ") hex data:" << endl;
                            uint32_t frameData[XS7_WORDS_PER_FRAME];
                            for(int w = 0 ; w < XS7_WORDS_PER_FRAME ; w++){
                                frameData[w] = FileIO::read32(fin, loadedBitstreamEndianness);
                            }
                            fout << "CLOCK: ";
                            for(int w = XS7_WORDS_BEFORE_CLK ; w < (XS7_WORDS_BEFORE_CLK + XS7_WORDS_AT_CLK) ; w++){
                                fout << "0x" << uppercase << hex << setw(8) << setfill('0') << frameData[w] << " ";
                            }
                            fout << " ;DATA: ";
                            for(int w = 0 ; w < XS7_WORDS_BEFORE_CLK ; w++){
                                fout << "0x" << uppercase << hex << setw(8) << setfill('0') << frameData[w] << " ";
                            }
                            for(int w = (XS7_WORDS_BEFORE_CLK + XS7_WORDS_AT_CLK) ; w < XS7_WORDS_PER_FRAME ; w++){
                                fout << "0x" << uppercase << hex << setw(8) << setfill('0') << frameData[w] << " ";
                            }
                            fout << endl;
                            XCAP_IncrementFAR(slr, b, r, c, m);
                        }
                    } else if(regAddr == XCAP::Register::CMD && wordCount == 1){
                        uint32_t writeData = FileIO::read32(fin, loadedBitstreamEndianness);
                        writeXCAPcommandName(fout, static_cast<XCAP::Command>(writeData));
                        fout << ";";
                        if(XCAP::Command::DESYNC == static_cast<XCAP::Command>(writeData)){
                            shadowFrameValid = 0;
                            synched = false;
                        }
                        if(XCAP::Command::WCFG == static_cast<XCAP::Command>(writeData)){
                            shadowFrameValid = 0;
                            fout << " (also clears shadow register)";
                        }
                        fout << endl;
                    } else if(regAddr == XCAP::Register::MAGIC1){
                        uint32_t nextInstr = FileIO::read32(fin, loadedBitstreamEndianness);
                        int nextInstrType = XCAP_getInstructionType(nextInstr);
                        XCAP::Operation nextInstrOP = XCAP_getInstructionOperation(nextInstr);
                        int nextInstrPayload = XCAP_getInstructionPayload(nextInstr);
                        if(2 == nextInstrType && XCAP::Operation::WRITE == nextInstrOP && 0 < nextInstrPayload){
                            slr++;
                            synched = false;
                            aligned = false;
                            fout << "Select next SLR for the next #" << dec << nextInstrPayload << " words." << endl;
                        } else {
                            fout << "Bad MAGIC1 instruction" << endl;
                            fin.seekg(-4, ios::cur);//rewind next instruction if not
                        }
                    } else if((instructionType == 1) && (wordCount == 0)){
                        fout << "Select register @";
                        writeXCAPregisterName(fout, regAddr);
                        fout << endl;
                    } else if(wordCount == 1){
                        uint32_t writeData = FileIO::read32(fin, loadedBitstreamEndianness);
                        fout << "@";
                        writeXCAPregisterName(fout, regAddr);
                        if(regAddr == XCAP::Register::FAR) {
                            XCAP_parseFAR(writeData, slr, b, r, c, m);
                            fout << " = BlockType=" << dec << b << " RowAddress=" << (r-SLRinfo[slr].fromRow) << " MajorAddress=" << c << " MinorAddress=" << m << endl;
                        } else {
                            fout << " = 0x" << uppercase << hex << setw(8) << setfill('0') << writeData << endl;
                        }
                    } else {
                        fout << "0x" << uppercase << hex << setw(8) << setfill('0') << instruction << "(Bad instruction)" << endl;
                    }
                } // OP_WRITE
            }// if synched
        } // if fin is still good
    } // for(;;)
}