From 0338368afa369d097dfb35e0705fef10baa3d20e Mon Sep 17 00:00:00 2001
From: Keith Rothman <537074+litghost@users.noreply.github.com>
Date: Thu, 28 Jan 2021 19:24:00 -0800
Subject: Add Partition APIs to ice40, nexus, gowin archs.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
---
 ice40/arch.cc    | 13 +++++++++++++
 ice40/arch.h     | 43 +++++++++++++++++++++++++++++++++++++++++++
 ice40/archdefs.h | 22 ++++++++++++++++++++++
 3 files changed, 78 insertions(+)

(limited to 'ice40')

diff --git a/ice40/arch.cc b/ice40/arch.cc
index e450e682..fcf6506d 100644
--- a/ice40/arch.cc
+++ b/ice40/arch.cc
@@ -115,6 +115,19 @@ Arch::Arch(ArchArgs args) : args(args)
     wire_to_net.resize(chip_info->wire_data.size());
     pip_to_net.resize(chip_info->pip_data.size());
     switches_locked.resize(chip_info->num_switches);
+
+    std::unordered_set<IdString> bel_types;
+    for(BelId bel : getBels()) {
+        bel_types.insert(getBelType(bel));
+    }
+
+    for(IdString bel_type : bel_types) {
+        cell_types.push_back(bel_type);
+
+        PartitionId partition;
+        partition.name = bel_type;
+        partitions.push_back(partition);
+    }
 }
 
 // -----------------------------------------------------------------------
diff --git a/ice40/arch.h b/ice40/arch.h
index 60171a4c..18fc3aeb 100644
--- a/ice40/arch.h
+++ b/ice40/arch.h
@@ -826,6 +826,46 @@ struct Arch : BaseCtx
         return cell_type == getBelType(bel);
     }
 
+    const std::vector<IdString> &getCellTypes() const {
+        return cell_types;
+    }
+
+    std::vector<PartitionId> getPartitions() const {
+        return partitions;
+    }
+
+    IdString getPartitionName(PartitionId partition) const {
+        return partition.name;
+    }
+
+    PartitionId getPartitionByName(IdString name) const {
+        PartitionId partition;
+        partition.name = name;
+        return partition;
+    }
+
+    PartitionId getPartitionForBel(BelId bel) const {
+        PartitionId partition;
+        partition.name = getBelType(bel);
+        return partition;
+    }
+
+    PartitionId getPartitionForCellType(IdString cell_type) const {
+        PartitionId partition;
+        partition.name = cell_type;
+        return partition;
+    }
+
+    std::vector<BelId> getBelsForPartition(PartitionId partition) const {
+        std::vector<BelId> bels;
+        for(BelId bel : getBels()) {
+            if(getBelType(bel) == partition.name) {
+                bels.push_back(bel);
+            }
+        }
+        return bels;
+    }
+
     // Whether or not a given cell can be placed at a given Bel
     // This is not intended for Bel type checks, but finer-grained constraints
     // such as conflicting set/reset signals, etc
@@ -867,6 +907,9 @@ struct Arch : BaseCtx
     static const std::vector<std::string> availablePlacers;
     static const std::string defaultRouter;
     static const std::vector<std::string> availableRouters;
+
+    std::vector<IdString> cell_types;
+    std::vector<PartitionId> partitions;
 };
 
 void ice40DelayFuzzerMain(Context *ctx);
diff --git a/ice40/archdefs.h b/ice40/archdefs.h
index e95953f1..1b7821b0 100644
--- a/ice40/archdefs.h
+++ b/ice40/archdefs.h
@@ -170,6 +170,17 @@ struct ArchCellInfo
     };
 };
 
+struct PartitionId {
+    IdString name;
+
+    bool operator==(const PartitionId &other) const { return (name == other.name); }
+    bool operator!=(const PartitionId &other) const { return (name != other.name); }
+    bool operator<(const PartitionId &other) const
+    {
+        return name < other.name;
+    }
+};
+
 NEXTPNR_NAMESPACE_END
 
 namespace std {
@@ -213,4 +224,15 @@ template <> struct hash<NEXTPNR_NAMESPACE_PREFIX DecalId>
         return seed;
     }
 };
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX PartitionId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX PartitionId &partition) const noexcept
+    {
+        std::size_t seed = 0;
+        boost::hash_combine(seed, hash<NEXTPNR_NAMESPACE_PREFIX IdString>()(partition.name));
+        return seed;
+    }
+};
+
 } // namespace std
-- 
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