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ecp5: Add GSR/SGSR support

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2019-08-27 13:14:41 +01:00
parent ccd9ca2a30
commit 78f86ce67a
4 changed files with 22 additions and 3 deletions
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8
ecp5/arch.cc
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@ -440,7 +440,10 @@ delay_t Arch::estimateDelay(WireId src, WireId dst) const
auto est_location = [&](WireId w) -> std::pair<int, int> {
const auto &wire = locInfo(w)->wire_data[w.index];
if (wire.num_bel_pins > 0) {
if (w == gsrclk_wire) {
auto phys_wire = getPipSrcWire(*(getPipsUphill(w).begin()));
return std::make_pair(int(phys_wire.location.x), int(phys_wire.location.y));
} else if (wire.num_bel_pins > 0) {
return std::make_pair(w.location.x + wire.bel_pins[0].rel_bel_loc.x,
w.location.y + wire.bel_pins[0].rel_bel_loc.y);
} else if (wire.num_downhill > 0) {
@ -711,7 +714,8 @@ bool Arch::getCellDelay(const CellInfo *cell, IdString fromPort, IdString toPort
std::string fn = fromPort.str(this), tn = toPort.str(this);
if (fn.size() > 1 && (fn.front() == 'A' || fn.front() == 'B') && std::isdigit(fn.at(1))) {
if (tn.size() > 1 && tn.front() == 'P' && std::isdigit(tn.at(1)))
return getDelayFromTimingDatabase(id_MULT18X18D_REGS_NONE, id(std::string("") + fn.front()), id_P, delay);
return getDelayFromTimingDatabase(id_MULT18X18D_REGS_NONE, id(std::string("") + fn.front()), id_P,
delay);
}
return false;
} else if (cell->type == id_IOLOGIC || cell->type == id_SIOLOGIC) {

4
ecp5/arch.h
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@ -1044,6 +1044,10 @@ struct Arch : BaseCtx
IdString id_clkmux, id_lsrmux;
IdString id_srmode, id_mode;
// Special case for delay estimates due to its physical location
// being far from the logical location of its primitive
WireId gsrclk_wire;
mutable std::unordered_map<DelayKey, std::pair<bool, DelayInfo>> celldelay_cache;
static const std::string defaultPlacer;

2
ecp5/bitstream.cc
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@ -1277,7 +1277,7 @@ void write_bitstream(Context *ctx, std::string base_config_file, std::string tex
cc.tiles[ctx->getTileByType("EFB3_PICB1")].add_enum("CCLK.MODE", "USRMCLK");
} else if (ci->type == id_GSR) {
cc.tiles[ctx->getTileByType("EFB0_PICB0")].add_enum(
"GSR.GSRMODE", str_or_default(ci->params, ctx->id("MODE"), "ACTIVE_HIGH"));
"GSR.GSRMODE", str_or_default(ci->params, ctx->id("MODE"), "ACTIVE_LOW"));
cc.tiles[ctx->getTileByType("VIQ_BUF")].add_enum("GSR.SYNCMODE",
str_or_default(ci->params, ctx->id("SYNCMODE"), "ASYNC"));
} else if (ci->type == id_JTAGG) {

11
ecp5/pack.cc
View File

@ -1411,6 +1411,17 @@ class Ecp5Packer
rename_port(ctx, ci, ctx->id("USRMCLKI"), id_PADDO);
rename_port(ctx, ci, ctx->id("USRMCLKTS"), id_PADDT);
rename_port(ctx, ci, ctx->id("USRMCLKO"), id_PADDI);
} else if (ci->type == id_GSR || ci->type == ctx->id("SGSR")) {
ci->params[ctx->id("MODE")] = std::string("ACTIVE_LOW");
ci->params[ctx->id("SYNCMODE")] =
ci->type == ctx->id("SGSR") ? std::string("SYNC") : std::string("ASYNC");
ci->type = id_GSR;
for (BelId bel : ctx->getBels()) {
if (ctx->getBelType(bel) != id_GSR)
continue;
ci->attrs[ctx->id("BEL")] = ctx->getBelName(bel).str(ctx);
ctx->gsrclk_wire = ctx->getBelPinWire(bel, id_CLK);
}
}
}
}