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ice40: Add a warning for unconstrained IO

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2018-11-29 19:35:19 +00:00
parent 90138fc120
commit 8af367ad0a
1 changed files with 5 additions and 6 deletions
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11
ice40/pack.cc
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@ -478,6 +478,9 @@ static void pack_io(Context *ctx)
} }
packed_cells.insert(ci->name); packed_cells.insert(ci->name);
std::copy(ci->attrs.begin(), ci->attrs.end(), std::inserter(sb->attrs, sb->attrs.begin())); std::copy(ci->attrs.begin(), ci->attrs.end(), std::inserter(sb->attrs, sb->attrs.begin()));
if (!sb->attrs.count(ctx->id("BEL")))
log_warning("IO '%s' is not constrained to a pin and will be automatically placed\n",
ci->name.c_str(ctx));
} else if (is_sb_io(ctx, ci) || is_sb_gb_io(ctx, ci)) { } else if (is_sb_io(ctx, ci) || is_sb_gb_io(ctx, ci)) {
NetInfo *net = ci->ports.at(ctx->id("PACKAGE_PIN")).net; NetInfo *net = ci->ports.at(ctx->id("PACKAGE_PIN")).net;
if ((net != nullptr) && (net->users.size() > 1)) if ((net != nullptr) && (net->users.size() > 1))
@ -520,12 +523,8 @@ static bool is_logic_port(BaseCtx *ctx, const PortRef &port)
static void insert_global(Context *ctx, NetInfo *net, bool is_reset, bool is_cen, bool is_logic, int fanout) static void insert_global(Context *ctx, NetInfo *net, bool is_reset, bool is_cen, bool is_logic, int fanout)
{ {
log_info("promoting %s%s%s%s (fanout %d)\n", log_info("promoting %s%s%s%s (fanout %d)\n", net->name.c_str(ctx), is_reset ? " [reset]" : "",
net->name.c_str(ctx), is_cen ? " [cen]" : "", is_logic ? " [logic]" : "", fanout);
is_reset ? " [reset]" : "",
is_cen ? " [cen]" : "",
is_logic ? " [logic]" : "",
fanout);
std::string glb_name = net->name.str(ctx) + std::string("_$glb_") + (is_reset ? "sr" : (is_cen ? "ce" : "clk")); std::string glb_name = net->name.str(ctx) + std::string("_$glb_") + (is_reset ? "sr" : (is_cen ? "ce" : "clk"));
std::unique_ptr<CellInfo> gb = create_ice_cell(ctx, ctx->id("SB_GB"), "$gbuf_" + glb_name); std::unique_ptr<CellInfo> gb = create_ice_cell(ctx, ctx->id("SB_GB"), "$gbuf_" + glb_name);