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/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2018 David Shah <david@symbioticeda.com>
* Copyright (C) 2021 William D. Jones <wjones@wdj-consulting.com>
*
* 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 <fstream>
#include "bitstream.h"
#include "config.h"
#include "nextpnr.h"
#include "util.h"
NEXTPNR_NAMESPACE_BEGIN
// These seem simple enough to do inline for now.
namespace BaseConfigs {
void config_empty_lcmxo2_1200hc(ChipConfig &cc)
{
cc.chip_name = "LCMXO2-1200HC";
cc.tiles["EBR_R6C11:EBR1"].add_unknown(0, 12);
cc.tiles["EBR_R6C15:EBR1"].add_unknown(0, 12);
cc.tiles["EBR_R6C18:EBR1"].add_unknown(0, 12);
cc.tiles["EBR_R6C21:EBR1"].add_unknown(0, 12);
cc.tiles["EBR_R6C2:EBR1"].add_unknown(0, 12);
cc.tiles["EBR_R6C5:EBR1"].add_unknown(0, 12);
cc.tiles["EBR_R6C8:EBR1"].add_unknown(0, 12);
cc.tiles["PT4:CFG0"].add_unknown(5, 30);
cc.tiles["PT4:CFG0"].add_unknown(5, 32);
cc.tiles["PT4:CFG0"].add_unknown(5, 36);
cc.tiles["PT7:CFG3"].add_unknown(5, 18);
}
} // namespace BaseConfigs
// Convert an absolute wire name to a relative Trellis one
static std::string get_trellis_wirename(Context *ctx, Location loc, WireId wire)
{
std::string basename = ctx->tile_info(wire)->wire_data[wire.index].name.get();
std::string prefix2 = basename.substr(0, 2);
std::string prefix7 = basename.substr(0, 7);
int max_col = ctx->chip_info->width - 1;
// Handle MachXO2's wonderful naming quirks for wires in left/right tiles, whose
// relative coords push them outside the bounds of the chip.
auto is_pio_wire = [](std::string name) {
return (name.find("DI") != std::string::npos || name.find("JDI") != std::string::npos ||
name.find("PADD") != std::string::npos || name.find("INDD") != std::string::npos ||
name.find("IOLDO") != std::string::npos || name.find("IOLTO") != std::string::npos ||
name.find("JCE") != std::string::npos || name.find("JCLK") != std::string::npos ||
name.find("JLSR") != std::string::npos || name.find("JONEG") != std::string::npos ||
name.find("JOPOS") != std::string::npos || name.find("JTS") != std::string::npos ||
name.find("JIN") != std::string::npos || name.find("JIP") != std::string::npos ||
// Connections to global mux
name.find("JINCK") != std::string::npos);
};
if (prefix2 == "G_" || prefix2 == "L_" || prefix2 == "R_" || prefix2 == "U_" || prefix2 == "D_" ||
prefix7 == "BRANCH_")
return basename;
if (loc == wire.location) {
// TODO: JINCK is not currently handled by this.
if (is_pio_wire(basename)) {
if (wire.location.x == 0)
return "W1_" + basename;
else if (wire.location.x == max_col)
return "E1_" + basename;
}
return basename;
}
std::string rel_prefix;
if (wire.location.y < loc.y)
rel_prefix += "N" + std::to_string(loc.y - wire.location.y);
if (wire.location.y > loc.y)
rel_prefix += "S" + std::to_string(wire.location.y - loc.y);
if (wire.location.x > loc.x)
rel_prefix += "E" + std::to_string(wire.location.x - loc.x);
if (wire.location.x < loc.x)
rel_prefix += "W" + std::to_string(loc.x - wire.location.x);
return rel_prefix + "_" + basename;
}
static void set_pip(Context *ctx, ChipConfig &cc, PipId pip)
{
std::string tile = ctx->get_pip_tilename(pip);
std::string source = get_trellis_wirename(ctx, pip.location, ctx->getPipSrcWire(pip));
std::string sink = get_trellis_wirename(ctx, pip.location, ctx->getPipDstWire(pip));
cc.tiles[tile].add_arc(sink, source);
}
static std::vector<bool> int_to_bitvector(int val, int size)
{
std::vector<bool> bv;
for (int i = 0; i < size; i++) {
bv.push_back((val & (1 << i)) != 0);
}
return bv;
}
std::string intstr_or_default(const dict<IdString, Property> &ct, const IdString &key, std::string def = "0")
{
auto found = ct.find(key);
if (found == ct.end())
return def;
else {
if (found->second.is_string)
return found->second.as_string();
else
return std::to_string(found->second.as_int64());
}
};
// Get the PIC tile corresponding to a PIO bel
static std::string get_pic_tile(Context *ctx, BelId bel)
{
static const std::set<std::string> pio_l = {"PIC_L0", "PIC_LS0", "PIC_L0_VREF3"};
static const std::set<std::string> pio_r = {"PIC_R0", "PIC_RS0"};
std::string pio_name = ctx->tile_info(bel)->bel_data[bel.index].name.get();
if (bel.location.y == 0) {
return ctx->get_tile_by_type_and_loc(0, bel.location.x, "PIC_T0");
} else if (bel.location.y == ctx->chip_info->height - 1) {
return ctx->get_tile_by_type_and_loc(bel.location.y, bel.location.x, "PIC_B0");
} else if (bel.location.x == 0) {
return ctx->get_tile_by_type_and_loc(bel.location.y, 0, pio_l);
} else if (bel.location.x == ctx->chip_info->width - 1) {
return ctx->get_tile_by_type_and_loc(bel.location.y, bel.location.x, pio_r);
} else {
NPNR_ASSERT_FALSE("bad PIO location");
}
}
void write_bitstream(Context *ctx, std::string text_config_file)
{
ChipConfig cc;
switch (ctx->args.type) {
case ArchArgs::LCMXO2_1200HC:
BaseConfigs::config_empty_lcmxo2_1200hc(cc);
break;
default:
NPNR_ASSERT_FALSE("Unsupported device type");
}
cc.metadata.push_back("Part: " + ctx->get_full_chip_name());
// Add all set, configurable pips to the config
for (auto pip : ctx->getPips()) {
if (ctx->getBoundPipNet(pip) != nullptr) {
if (ctx->get_pip_class(pip) == 0) { // ignore fixed pips
set_pip(ctx, cc, pip);
}
}
}
// TODO: Bank Voltages
// Configure slices
for (auto &cell : ctx->cells) {
CellInfo *ci = cell.second.get();
if (ci->bel == BelId()) {
log_warning("found unplaced cell '%s' during bitstream gen. Not writing to bitstream.\n",
ci->name.c_str(ctx));
continue;
}
BelId bel = ci->bel;
if (ci->type == id_FACADE_SLICE) {
std::string tname = ctx->get_tile_by_type_and_loc(bel.location.y, bel.location.x, "PLC");
std::string slice = ctx->tile_info(bel)->bel_data[bel.index].name.get();
NPNR_ASSERT(slice.substr(0, 5) == "SLICE");
int int_index = slice[5] - 'A';
NPNR_ASSERT(int_index >= 0 && int_index < 4);
int lut0_init = int_or_default(ci->params, ctx->id("LUT0_INITVAL"));
int lut1_init = int_or_default(ci->params, ctx->id("LUT1_INITVAL"));
cc.tiles[tname].add_word(slice + ".K0.INIT", int_to_bitvector(lut0_init, 16));
cc.tiles[tname].add_word(slice + ".K1.INIT", int_to_bitvector(lut1_init, 16));
cc.tiles[tname].add_enum(slice + ".MODE", str_or_default(ci->params, ctx->id("MODE"), "LOGIC"));
cc.tiles[tname].add_enum(slice + ".GSR", str_or_default(ci->params, ctx->id("GSR"), "ENABLED"));
cc.tiles[tname].add_enum("LSR" + std::to_string(int_index) + ".SRMODE",
str_or_default(ci->params, ctx->id("SRMODE"), "LSR_OVER_CE"));
cc.tiles[tname].add_enum(slice + ".CEMUX", intstr_or_default(ci->params, ctx->id("CEMUX"), "1"));
cc.tiles[tname].add_enum("CLK" + std::to_string(int_index) + ".CLKMUX",
intstr_or_default(ci->params, ctx->id("CLKMUX"), "0"));
cc.tiles[tname].add_enum("LSR" + std::to_string(int_index) + ".LSRMUX",
str_or_default(ci->params, ctx->id("LSRMUX"), "LSR"));
cc.tiles[tname].add_enum("LSR" + std::to_string(int_index) + ".LSRONMUX",
intstr_or_default(ci->params, ctx->id("LSRONMUX"), "LSRMUX"));
cc.tiles[tname].add_enum(slice + ".REGMODE", str_or_default(ci->params, ctx->id("REGMODE"), "FF"));
cc.tiles[tname].add_enum(slice + ".REG0.SD", intstr_or_default(ci->params, ctx->id("REG0_SD"), "0"));
cc.tiles[tname].add_enum(slice + ".REG1.SD", intstr_or_default(ci->params, ctx->id("REG1_SD"), "0"));
cc.tiles[tname].add_enum(slice + ".REG0.REGSET",
str_or_default(ci->params, ctx->id("REG0_REGSET"), "RESET"));
cc.tiles[tname].add_enum(slice + ".REG1.REGSET",
str_or_default(ci->params, ctx->id("REG1_REGSET"), "RESET"));
} else if (ci->type == ctx->id("FACADE_IO")) {
std::string pio = ctx->tile_info(bel)->bel_data[bel.index].name.get();
std::string iotype = str_or_default(ci->attrs, ctx->id("IO_TYPE"), "LVCMOS33");
std::string dir = str_or_default(ci->params, ctx->id("DIR"), "INPUT");
std::string pic_tile = get_pic_tile(ctx, bel);
cc.tiles[pic_tile].add_enum(pio + ".BASE_TYPE", dir + "_" + iotype);
} else if (ci->type == ctx->id("OSCH")) {
std::string freq = str_or_default(ci->params, ctx->id("NOM_FREQ"), "2.08");
cc.tiles[ctx->get_tile_by_type("CFG1")].add_enum("OSCH.MODE", "OSCH");
cc.tiles[ctx->get_tile_by_type("CFG1")].add_enum("OSCH.NOM_FREQ", freq);
}
}
// Configure chip
if (!text_config_file.empty()) {
std::ofstream out_config(text_config_file);
out_config << cc;
}
}
NEXTPNR_NAMESPACE_END
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