457 lines
16 KiB
C++
457 lines
16 KiB
C++
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#include "Bitstream.hpp"
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#include "Chip.hpp"
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#include "Util.hpp"
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#include <bitset>
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#include <boost/algorithm/string/predicate.hpp>
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#include <boost/optional.hpp>
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#include <cstring>
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#include <iostream>
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namespace GateMate {
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static constexpr const uint8_t CMD_PLL = 0xc1;
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static constexpr const uint8_t CMD_CFGMODE = 0xc2;
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static constexpr const uint8_t CMD_CFGRST = 0xc3; //
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static constexpr const uint8_t CMD_FLASH = 0xc5;
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static constexpr const uint8_t CMD_DLXP = 0xc6; //
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static constexpr const uint8_t CMD_DLYP = 0xc7; //
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static constexpr const uint8_t CMD_LXLYS = 0xc8;
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static constexpr const uint8_t CMD_ACLCU = 0xc9;
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static constexpr const uint8_t CMD_DLCU = 0xca;
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static constexpr const uint8_t CMD_DRXP = 0xcc; //
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static constexpr const uint8_t CMD_RXRYS = 0xce;
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static constexpr const uint8_t CMD_FRAM = 0xd2;
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static constexpr const uint8_t CMD_SERDES = 0xd7; //
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static constexpr const uint8_t CMD_D2D = 0xd8; //
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static constexpr const uint8_t CMD_PATH = 0xd9;
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static constexpr const uint8_t CMD_JUMP = 0xda; //
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static constexpr const uint8_t CMD_CHG_STATUS = 0xdb;
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static constexpr const uint8_t CMD_WAIT_PLL = 0xdc; //
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static constexpr const uint8_t CMD_SPLL = 0xdd;
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static constexpr const uint8_t CMD_SLAVE_MODE = 0xde;
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static const uint16_t crc_table_x25[256] = {
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0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
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0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
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0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
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0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
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0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
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0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
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0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
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0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
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0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
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0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
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0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
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0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
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0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
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0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
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0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
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0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
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0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
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0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
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0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
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0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
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0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
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0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
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0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
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0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
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0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
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0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
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0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
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0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
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0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
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0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
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0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
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0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 };
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class Crc16 {
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public:
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uint16_t crc16 = 0xFFFF;
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void update_crc16(uint8_t val) {
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crc16 = (crc16 >> 8) ^ crc_table_x25[(crc16 & 0xFF) ^ val];
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}
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uint16_t finalise_crc16() {
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return crc16 ^ 0xFFFF;
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}
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void reset_crc16() {
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crc16 = 0xFFFF;
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}
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};
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// The BitstreamReadWriter class stores state (including CRC16) whilst reading
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// the bitstream
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class BitstreamReadWriter {
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public:
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BitstreamReadWriter() : data(), iter(data.begin()) {};
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BitstreamReadWriter(const vector<uint8_t> &data) : data(data), iter(this->data.begin()) {};
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vector<uint8_t> data;
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vector<uint8_t>::iterator iter;
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Crc16 crc16;
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// Return a single byte and update CRC
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inline uint8_t get_byte() {
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assert(iter < data.end());
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uint8_t val = *(iter++);
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crc16.update_crc16(val);
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return val;
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}
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// Read a big endian uint16 from the bitstream and update CRC
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uint16_t get_uint16() {
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uint8_t tmp[2];
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get_bytes(tmp, 2);
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return (tmp[0] << 8UL) | (tmp[1]);
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}
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// CRC is in little endian order
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uint16_t get_crc() {
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uint8_t tmp[2];
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get_bytes(tmp, 2);
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return (tmp[1] << 8UL) | (tmp[0]);
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}
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// The command opcode is a byte so this works like get_byte
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inline uint8_t get_command_opcode() {
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assert(iter < data.end());
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uint8_t val = *(iter++);
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crc16.update_crc16(val);
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return val;
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}
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// Write a single byte and update CRC
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inline void write_byte(uint8_t b) {
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data.push_back(b);
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crc16.update_crc16(b);
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}
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// Copy multiple bytes into an OutputIterator and update CRC
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template<typename T>
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void get_bytes(T out, size_t count) {
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for (size_t i = 0; i < count; i++) {
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*out = get_byte();
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++out;
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}
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}
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void get_vector(std::vector<uint8_t> &out, size_t count) {
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for (size_t i = 0; i < count; i++) {
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out.push_back(get_byte());
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}
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}
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// Write multiple bytes from an InputIterator and update CRC
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template<typename T>
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void write_bytes(T in, size_t count) {
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for (size_t i = 0; i < count; i++)
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write_byte(*(in++));
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}
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// Skip over bytes while updating CRC
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void skip_bytes(size_t count) {
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for (size_t i = 0; i < count; i++) get_byte();
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}
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// Write a big endian uint16_t into the bitstream
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void write_uint16(uint16_t val) {
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write_byte(uint8_t((val >> 8UL) & 0xFF));
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write_byte(uint8_t(val & 0xFF));
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}
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// Get the offset into the bitstream
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size_t get_offset() {
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return size_t(distance(data.begin(), iter));
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}
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// Check the calculated CRC16 against an actual CRC16, expected in the next 2 bytes
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void check_crc16() {
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uint8_t crc_bytes[2];
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uint16_t actual_crc = crc16.finalise_crc16();
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get_bytes(crc_bytes, 2);
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// cerr << hex << int(crc_bytes[0]) << " " << int(crc_bytes[1]) << endl;
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uint16_t exp_crc = (crc_bytes[0] << 8) | crc_bytes[1];
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if (actual_crc != exp_crc) {
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ostringstream err;
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err << "crc fail, calculated 0x" << hex << actual_crc << " but expecting 0x" << exp_crc;
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throw BitstreamParseError(err.str(), get_offset());
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}
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crc16.reset_crc16();
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}
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// Insert the calculated CRC16 into the bitstream, and then reset it
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void insert_crc16() {
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uint16_t actual_crc = crc16.finalise_crc16();
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write_byte(uint8_t((actual_crc >> 8) & 0xFF));
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write_byte(uint8_t((actual_crc) & 0xFF));
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crc16.reset_crc16();
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}
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bool is_end() {
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return (iter >= data.end());
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}
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const vector<uint8_t> &get() {
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return data;
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};
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};
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void check_crc(BitstreamReadWriter &rd)
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{
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uint16_t actual_crc = rd.crc16.finalise_crc16();
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uint16_t exp_crc = rd.get_crc(); // crc
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if (actual_crc != exp_crc) {
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ostringstream err;
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err << "crc fail, calculated 0x" << hex << actual_crc << " but expecting 0x" << exp_crc;
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throw BitstreamParseError(err.str());
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}
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}
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#define BITSTREAM_DEBUG(x) if (verbosity >= VerbosityLevel::DEBUG) cerr << "bitstream: " << x << endl
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#define BITSTREAM_NOTE(x) if (verbosity >= VerbosityLevel::NOTE) cerr << "bitstream: " << x << endl
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#define BITSTREAM_FATAL(x, pos) { ostringstream ss; ss << x; throw BitstreamParseError(ss.str(), pos); }
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Bitstream::Bitstream(const std::vector<uint8_t> &data) : data(data) { }
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Bitstream Bitstream::read(std::istream &in)
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{
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std::vector<uint8_t> bytes;
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in.seekg(0, in.end);
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size_t length = size_t(in.tellg());
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in.seekg(0, in.beg);
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bytes.resize(length);
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in.read(reinterpret_cast<char *>(&(bytes[0])), length);
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return Bitstream(bytes);
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}
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Chip Bitstream::deserialise_chip()
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{
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cerr << "bitstream size: " << data.size() * 8 << " bits" << endl;
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Chip chip;
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BitstreamReadWriter rd(data);
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while(!rd.is_end()) {
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rd.crc16.reset_crc16();
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uint8_t cmd = rd.get_command_opcode();
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uint16_t length = (cmd==CMD_FRAM) ? rd.get_uint16() : rd.get_byte();
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std::vector<uint8_t> block;
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bool is_block_ram = false;
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uint8_t x_pos, y_pos;
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switch (cmd) {
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case CMD_DLCU:
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BITSTREAM_DEBUG("CMD_DLCU");
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//if (length>112)
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// BITSTREAM_FATAL("DLCU data longer than expected", rd.get_offset());
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if (is_block_ram) {
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if (length>27)
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BITSTREAM_FATAL("RAM configuration must be up to 27 bytes", rd.get_offset());
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} else {
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if (length>112)
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BITSTREAM_FATAL("Tile configuration must be up to 112 bytes", rd.get_offset());
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}
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// Check header CRC
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check_crc(rd);
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// Read data block
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rd.get_vector(block, length);
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// Check data CRC
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check_crc(rd);
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break;
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case CMD_PATH:
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BITSTREAM_DEBUG("CMD_PATH");
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if (length!=1)
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BITSTREAM_FATAL("PATH data must be one byte long", rd.get_offset());
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// Check header CRC
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check_crc(rd);
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// Read data block
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rd.get_byte();
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// Check data CRC
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check_crc(rd);
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// Skip bytes
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rd.skip_bytes(9);
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break;
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case CMD_SPLL:
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BITSTREAM_DEBUG("CMD_SPLL");
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if (length!=1)
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BITSTREAM_FATAL("SPLL data must be one byte long", rd.get_offset());
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// Check header CRC
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check_crc(rd);
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// Read data block
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rd.get_byte();
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// Check data CRC
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check_crc(rd);
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break;
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case CMD_PLL:
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BITSTREAM_DEBUG("CMD_PLL");
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if (length<12)
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BITSTREAM_FATAL("PLL data smaller than expected", rd.get_offset());
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if (length>24)
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BITSTREAM_FATAL("PLL data longer than expected", rd.get_offset());
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// Check header CRC
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check_crc(rd);
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// Read data block
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rd.get_vector(block, length);
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// Check data CRC
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check_crc(rd);
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// Skip bytes
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rd.skip_bytes(6);
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break;
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case CMD_LXLYS:
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if (length!=2)
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BITSTREAM_FATAL("LXLYS data must be two bytes long", rd.get_offset());
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// Check header CRC
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check_crc(rd);
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BITSTREAM_DEBUG("CMD_LXLYS");
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is_block_ram = false;
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|
|
x_pos = rd.get_byte();
|
||
|
|
if (x_pos > 81)
|
||
|
|
BITSTREAM_FATAL("Tile column (X) must be in range 0-81, current value " << x_pos, rd.get_offset());
|
||
|
|
y_pos = rd.get_byte();
|
||
|
|
if (y_pos > 65)
|
||
|
|
BITSTREAM_FATAL("Tile row (Y) must be in range 0-65, current value " << y_pos, rd.get_offset());
|
||
|
|
// Check data CRC
|
||
|
|
check_crc(rd);
|
||
|
|
break;
|
||
|
|
case CMD_ACLCU:
|
||
|
|
BITSTREAM_DEBUG("CMD_ACLCU");
|
||
|
|
if (length!=2)
|
||
|
|
BITSTREAM_FATAL("ACLCU data must be two bytes long", rd.get_offset());
|
||
|
|
// Check header CRC
|
||
|
|
check_crc(rd);
|
||
|
|
rd.get_uint16();
|
||
|
|
// Check data CRC
|
||
|
|
check_crc(rd);
|
||
|
|
break;
|
||
|
|
case CMD_RXRYS:
|
||
|
|
BITSTREAM_DEBUG("CMD_RXRYS");
|
||
|
|
if (length!=2)
|
||
|
|
BITSTREAM_FATAL("RXRYS data must be two bytes long", rd.get_offset());
|
||
|
|
// Check header CRC
|
||
|
|
check_crc(rd);
|
||
|
|
is_block_ram = true;
|
||
|
|
|
||
|
|
x_pos = rd.get_byte();
|
||
|
|
if (x_pos > 3)
|
||
|
|
BITSTREAM_FATAL("RAM column (X) must be in range 0-3, current value " << x_pos, rd.get_offset());
|
||
|
|
y_pos = rd.get_byte();
|
||
|
|
if (y_pos > 7)
|
||
|
|
BITSTREAM_FATAL("RAM row (Y) must be in range 0-7, current value " << y_pos, rd.get_offset());
|
||
|
|
// Check data CRC
|
||
|
|
check_crc(rd);
|
||
|
|
break;
|
||
|
|
case CMD_FRAM:
|
||
|
|
BITSTREAM_DEBUG("CMD_FRAM");
|
||
|
|
if (length>5120)
|
||
|
|
BITSTREAM_FATAL("FRAM data longer than expected", rd.get_offset());
|
||
|
|
// Check header CRC
|
||
|
|
check_crc(rd);
|
||
|
|
|
||
|
|
// Read data block
|
||
|
|
rd.get_vector(block, length);
|
||
|
|
// Check data CRC
|
||
|
|
check_crc(rd);
|
||
|
|
break;
|
||
|
|
case CMD_CHG_STATUS:
|
||
|
|
BITSTREAM_DEBUG("CMD_CHG_STATUS");
|
||
|
|
if (length>12)
|
||
|
|
BITSTREAM_FATAL("CHG_STATUS data longer than expected", rd.get_offset());
|
||
|
|
// Check header CRC
|
||
|
|
check_crc(rd);
|
||
|
|
|
||
|
|
// Read data block
|
||
|
|
rd.get_vector(block, length);
|
||
|
|
// Check data CRC
|
||
|
|
check_crc(rd);
|
||
|
|
|
||
|
|
// Skip bytes
|
||
|
|
rd.skip_bytes(9);
|
||
|
|
break;
|
||
|
|
case CMD_SLAVE_MODE:
|
||
|
|
BITSTREAM_DEBUG("CMD_SLAVE_MODE");
|
||
|
|
if (length>1)
|
||
|
|
BITSTREAM_FATAL("SLAVE_MODE must be one byte long", rd.get_offset());
|
||
|
|
// Check header CRC
|
||
|
|
check_crc(rd);
|
||
|
|
|
||
|
|
// Read data block
|
||
|
|
rd.get_byte();
|
||
|
|
// Check data CRC
|
||
|
|
check_crc(rd);
|
||
|
|
|
||
|
|
// Skip bytes
|
||
|
|
rd.skip_bytes(3);
|
||
|
|
break;
|
||
|
|
case CMD_FLASH:
|
||
|
|
BITSTREAM_DEBUG("CMD_FLASH");
|
||
|
|
if (length>11)
|
||
|
|
BITSTREAM_FATAL("FLASH data longer than expected", rd.get_offset());
|
||
|
|
// Check header CRC
|
||
|
|
check_crc(rd);
|
||
|
|
|
||
|
|
// Read data block
|
||
|
|
rd.get_vector(block, length);
|
||
|
|
// Check data CRC
|
||
|
|
check_crc(rd);
|
||
|
|
break;
|
||
|
|
case CMD_CFGMODE:
|
||
|
|
BITSTREAM_DEBUG("CMD_CFGMODE");
|
||
|
|
if (length>20)
|
||
|
|
BITSTREAM_FATAL("PLL data longer than expected", rd.get_offset());
|
||
|
|
// Check header CRC
|
||
|
|
check_crc(rd);
|
||
|
|
|
||
|
|
// Read data block
|
||
|
|
rd.get_vector(block, length);
|
||
|
|
// Check data CRC
|
||
|
|
check_crc(rd);
|
||
|
|
|
||
|
|
// Skip bytes
|
||
|
|
rd.skip_bytes(3);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
BITSTREAM_FATAL("Unhandled command 0x" << hex << setw(2) << setfill('0') << int(cmd),
|
||
|
|
rd.get_offset());
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return chip;
|
||
|
|
}
|
||
|
|
|
||
|
|
Bitstream Bitstream::serialise_chip(const Chip &/*chip*/) {
|
||
|
|
return Bitstream({});
|
||
|
|
}
|
||
|
|
|
||
|
|
void Bitstream::write_bit(std::ostream &out)
|
||
|
|
{
|
||
|
|
// Dump raw bitstream
|
||
|
|
out.write(reinterpret_cast<const char *>(&(data[0])), data.size());
|
||
|
|
}
|
||
|
|
|
||
|
|
BitstreamParseError::BitstreamParseError(const std::string &desc) : runtime_error(desc.c_str()), desc(desc), offset(-1)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
BitstreamParseError::BitstreamParseError(const std::string &desc, size_t offset)
|
||
|
|
: runtime_error(desc.c_str()), desc(desc), offset(int(offset))
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
const char *BitstreamParseError::what() const noexcept
|
||
|
|
{
|
||
|
|
std::ostringstream ss;
|
||
|
|
ss << "Bitstream Parse Error: ";
|
||
|
|
ss << desc;
|
||
|
|
if (offset != -1)
|
||
|
|
ss << " [at 0x" << std::hex << setw(8) << setfill('0') << offset << "]";
|
||
|
|
return strdup(ss.str().c_str());
|
||
|
|
}
|
||
|
|
} // namespace GateMate
|