From e71055cfe8f3d90e157174b1fd83a06487a0a6a2 Mon Sep 17 00:00:00 2001 From: Sylvain Munaut Date: Thu, 7 Mar 2019 23:48:10 +0100 Subject: ice40: Add ice40_braminit pass to allow initialization of BRAM from file This adds a INIT_FILE attribute to the SB_RAM40_4K blocks that will initialize content from a hex file. Same behavior is imlemented in the simulation model and in a new pass for actual synthesis Signed-off-by: Sylvain Munaut --- techlibs/ice40/ice40_braminit.cc | 159 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 159 insertions(+) create mode 100644 techlibs/ice40/ice40_braminit.cc (limited to 'techlibs/ice40/ice40_braminit.cc') diff --git a/techlibs/ice40/ice40_braminit.cc b/techlibs/ice40/ice40_braminit.cc new file mode 100644 index 000000000..bf12f9148 --- /dev/null +++ b/techlibs/ice40/ice40_braminit.cc @@ -0,0 +1,159 @@ +/* + * yosys -- Yosys Open SYnthesis Suite + * + * Copyright (C) 2012 Clifford Wolf + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ + +#include "kernel/yosys.h" +#include "kernel/sigtools.h" +#include +#include +#include + +USING_YOSYS_NAMESPACE +PRIVATE_NAMESPACE_BEGIN + +static void run_ice40_braminit(Module *module) +{ + for (auto cell : module->selected_cells()) + { + uint16_t mem[256]; + + /* Only consider cells we're interested in */ + if (cell->type != "\\SB_RAM40_4K" && + cell->type != "\\SB_RAM40_4KNR" && + cell->type != "\\SB_RAM40_4KNW" && + cell->type != "\\SB_RAM40_4KNRNW") + continue; + if (!cell->hasParam("\\INIT_FILE")) + continue; + std::string init_file = cell->getParam("\\INIT_FILE").decode_string(); + cell->unsetParam("\\INIT_FILE"); + if (init_file == "") + continue; + + /* Open file */ + log("Processing %s : %s\n", RTLIL::id2cstr(cell->name), init_file.c_str()); + + std::ifstream f; + f.open(init_file.c_str()); + if (f.fail()) { + log("Can not open file `%s`.\n", init_file.c_str()); + continue; + } + + /* Defaults to 0 */ + memset(mem, 0x00, sizeof(mem)); + + /* Process each line */ + bool in_comment = false; + int cursor = 0; + + while (!f.eof()) + { + std::string line, token; + std::getline(f, line); + + for (int i = 0; i < GetSize(line); i++) + { + if (in_comment && line.substr(i, 2) == "*/") { + line[i] = ' '; + line[i+1] = ' '; + in_comment = false; + continue; + } + if (!in_comment && line.substr(i, 2) == "/*") + in_comment = true; + if (in_comment) + line[i] = ' '; + } + + while (1) + { + bool set_cursor = false; + long value; + + token = next_token(line, " \t\r\n"); + if (token.empty() || token.substr(0, 2) == "//") + break; + + if (token[0] == '@') { + token = token.substr(1); + set_cursor = true; + } + + const char *nptr = token.c_str(); + char *endptr; + value = strtol(nptr, &endptr, 16); + if (!*nptr || *endptr) { + log("Can not parse %s `%s` for %s.\n", + set_cursor ? "address" : "value", + nptr, token.c_str() + ); + continue; + } + + if (set_cursor) + cursor = value; + else if (cursor >= 0 && cursor < 256) + mem[cursor++] = value; + else + log("Attempt to initialize non existent address %d\n", cursor); + } + } + + /* Set attributes */ + const char *hex = "0123456789ABCDEF"; + for (int i=0; i<16; i++) { + std::string val = ""; + for (int j=15; j>=0; j--) + val += std::bitset<16>(mem[i*16+j]).to_string(); + cell->setParam("\\INIT_" + std::string(1, hex[i]), RTLIL::Const::from_string(val)); + } + } +} + +struct Ice40BRAMInitPass : public Pass { + Ice40BRAMInitPass() : Pass("ice40_braminit", "iCE40: perform SB_RAM40_4K initialization from file") { } + void help() YS_OVERRIDE + { + // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| + log("\n"); + log(" ice40_braminit\n"); + log("\n"); + log("This command processes all SB_RAM40_4K blocks with a non-empty INIT_FILE\n"); + log("parameter and converts it inti the required INIT_x attributes\n"); + log("\n"); + } + void execute(std::vector args, RTLIL::Design *design) YS_OVERRIDE + { + log_header(design, "Executing ICE40_BRAMINIT pass.\n"); + + size_t argidx; + for (argidx = 1; argidx < args.size(); argidx++) { + // if (args[argidx] == "-???") { + // continue; + // } + break; + } + extra_args(args, argidx, design); + + for (auto module : design->selected_modules()) + run_ice40_braminit(module); + } +} Ice40BRAMInitPass; + +PRIVATE_NAMESPACE_END -- cgit v1.2.3 From ff4c2a14ae34eeb899c3cf0ca1109f0106b41679 Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Sat, 9 Mar 2019 13:24:55 -0800 Subject: Fix typo in ice40_braminit help msg Signed-off-by: Clifford Wolf --- techlibs/ice40/ice40_braminit.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'techlibs/ice40/ice40_braminit.cc') diff --git a/techlibs/ice40/ice40_braminit.cc b/techlibs/ice40/ice40_braminit.cc index bf12f9148..4fa6b0792 100644 --- a/techlibs/ice40/ice40_braminit.cc +++ b/techlibs/ice40/ice40_braminit.cc @@ -135,7 +135,7 @@ struct Ice40BRAMInitPass : public Pass { log(" ice40_braminit\n"); log("\n"); log("This command processes all SB_RAM40_4K blocks with a non-empty INIT_FILE\n"); - log("parameter and converts it inti the required INIT_x attributes\n"); + log("parameter and converts it into the required INIT_x attributes\n"); log("\n"); } void execute(std::vector args, RTLIL::Design *design) YS_OVERRIDE -- cgit v1.2.3