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Merge pull request #798 from kleinai/extref-loc

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Make EXTREFB handling more robust
This commit is contained in:
gatecat 2021-08-19 16:36:18 +01:00 committed by GitHub
commit 897a2fccb6
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 44 additions and 6 deletions
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46
ecp5/pack.cc
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@ -1766,6 +1766,26 @@ class Ecp5Packer
if (ci->type == id_EXTREFB) {
const NetInfo *refo = net_or_nullptr(ci, id_REFCLKO);
CellInfo *dcu = nullptr;
std::string loc_bel = std::string("NONE");
std::string dcu_bel = std::string("NONE");
if (ci->attrs.count(ctx->id("LOC"))) {
std::string loc = ci->attrs.at(ctx->id("LOC")).as_string();
if (loc == "EXTREF0" &&
(ctx->args.type == ArchArgs::LFE5UM_25F || ctx->args.type == ArchArgs::LFE5UM5G_25F))
loc_bel = std::string("X42/Y50/EXTREF");
else if (loc == "EXTREF0" &&
(ctx->args.type == ArchArgs::LFE5UM_45F || ctx->args.type == ArchArgs::LFE5UM5G_45F))
loc_bel = std::string("X42/Y71/EXTREF");
else if (loc == "EXTREF1" &&
(ctx->args.type == ArchArgs::LFE5UM_45F || ctx->args.type == ArchArgs::LFE5UM5G_45F))
loc_bel = std::string("X69/Y71/EXTREF");
else if (loc == "EXTREF0" &&
(ctx->args.type == ArchArgs::LFE5UM_85F || ctx->args.type == ArchArgs::LFE5UM5G_85F))
loc_bel = std::string("X46/Y95/EXTREF");
else if (loc == "EXTREF1" &&
(ctx->args.type == ArchArgs::LFE5UM_85F || ctx->args.type == ArchArgs::LFE5UM5G_85F))
loc_bel = std::string("X71/Y95/EXTREF");
}
if (refo == nullptr)
log_error("EXTREFB REFCLKO must not be unconnected\n");
for (auto user : refo->users) {
@ -1775,12 +1795,30 @@ class Ecp5Packer
log_error("EXTREFB REFCLKO must only drive a single DCUA\n");
dcu = user.cell;
}
if (dcu != nullptr) {
if (!dcu->attrs.count(ctx->id("BEL")))
log_error("DCU must be constrained to a Bel!\n");
std::string bel = dcu->attrs.at(ctx->id("BEL")).as_string();
NPNR_ASSERT(bel.substr(bel.length() - 3) == "DCU");
bel.replace(bel.length() - 3, 3, "EXTREF");
ci->attrs[ctx->id("BEL")] = bel;
dcu_bel = dcu->attrs.at(ctx->id("BEL")).as_string();
NPNR_ASSERT(dcu_bel.substr(dcu_bel.length() - 3) == "DCU");
dcu_bel.replace(dcu_bel.length() - 3, 3, "EXTREF");
}
if (dcu_bel != loc_bel) {
if (dcu_bel == "NONE" && loc_bel == "NONE") {
log_error("EXTREFB has neither a LOC or a directly associated DCUA\n");
} else if (dcu_bel == "NONE") {
ci->attrs[ctx->id("BEL")] = loc_bel;
dcu_bel = loc_bel;
} else if (loc_bel == "NONE") {
ci->attrs[ctx->id("BEL")] = dcu_bel;
} else {
log_error("EXTREFB has conflicting LOC '%s' and associated DCUA '%s'\n", loc_bel.c_str(),
dcu_bel.c_str());
}
} else {
if (dcu_bel == "NONE")
log_error("EXTREFB has no LOC or associated DCUA\n");
ci->attrs[ctx->id("BEL")] = dcu_bel;
}
} else if (ci->type == id_PCSCLKDIV) {
const NetInfo *clki = net_or_nullptr(ci, id_CLKI);
if (clki != nullptr && clki->driver.cell != nullptr && clki->driver.cell->type == id_DCUA) {