mistral: M10K cell function

2 files changed, 75 insertions, 2 deletions

diff --git a/mistral/constids.inc b/mistral/constids.inc
index 82cd9ecc..e032bf53 100644
--- a/mistral/constids.inc
+++ b/mistral/constids.inc
@@ -101,6 +101,8 @@ X(cyclonev_hps_interface_mpu_general_purpose)
 X(MISTRAL_M10K)
 X(ADDRSTALLA)
 X(ADDRSTALLB)
+X(CFG_ABITS)
+X(CFG_DBITS)
 
 X(clkout)
 X(clkout1)
@@ -108,4 +110,4 @@ X(compress_rbf)
 X(oscena)
 X(placer)
 X(router)
-X(step)
\ No newline at end of file
+X(step)
diff --git a/mistral/m10k.cc b/mistral/m10k.cc
index 4ab35096..d6aa1ed2 100644
--- a/mistral/m10k.cc
+++ b/mistral/m10k.cc
@@ -46,7 +46,7 @@ void Arch::create_m10k(int x, int y)
     }
     for (int z = 0; z < 4; z++) {
         add_bel_pin(bel, id(stringf("ENABLE[%d]", z)), PORT_IN,
-                    get_port(CycloneV::M10K, x, y, -1, CycloneV::ENABLE, 0));
+                    get_port(CycloneV::M10K, x, y, -1, CycloneV::ENABLE, z));
     }
     for (int z = 0; z < 12; z++) {
         add_bel_pin(bel, id(stringf("ADDRA[%d]", z)), PORT_IN,
@@ -66,4 +66,75 @@ void Arch::create_m10k(int x, int y)
     }
 }
 
+static void assign_lab_pins(Context *ctx, CellInfo *cell)
+{
+    auto abits = cell->attrs[id_CFG_ABITS].as_int64();
+    auto dbits = cell->attrs[id_CFG_DBITS].as_int64();
+    NPNR_ASSERT(abits >= 7 && abits <= 13);
+    NPNR_ASSERT(dbits == 1 || dbits == 2 || dbits == 5 || dbits == 10 || dbits == 20);
+
+    // Quartus doesn't seem to generate ADDRSTALL[AB], BYTEENABLE[AB][01].
+
+    // It *does* generate ACLR[01] but leaves them unconnected if unused.
+
+    // Enables.
+    // RDEN[0] and WREN[1] are left unconnected.
+    cell->pin_data[ctx->id("A1EN")].bel_pins = {ctx->id("RDEN[1]")};
+    cell->pin_data[ctx->id("B1EN")].bel_pins = {ctx->id("WREN[0]")};
+
+    // Clocks.
+    cell->pin_data[ctx->id("CLK1")].bel_pins = {ctx->id("CLKIN[0]")};
+
+    // Enables left unconnected.
+
+    // Address lines.
+    int addr_offset = std::max(12 - std::max(abits, int64_t{9}), 0l);
+    int bit_offset = 0;
+    if (abits == 13) {
+        cell->pin_data[ctx->id("A1ADDR[0]")].bel_pins = {ctx->id("DATAAIN[4]")};
+        cell->pin_data[ctx->id("B1ADDR[0]")].bel_pins = {ctx->id("DATABIN[19]")};
+        bit_offset = 1;
+    }
+    for (int bit = bit_offset; bit < abits; bit++) {
+        cell->pin_data[ctx->id(stringf("A1ADDR[%d]", bit))].bel_pins = {ctx->id(stringf("ADDRA[%d]", bit + addr_offset))};
+        cell->pin_data[ctx->id(stringf("B1ADDR[%d]", bit))].bel_pins = {ctx->id(stringf("ADDRB[%d]", bit + addr_offset))};
+    }
+
+    // Data lines
+    std::vector<int> offsets;
+    offsets.push_back(0);
+    if (abits >= 10 && dbits <= 10) {
+        offsets.push_back(10);
+    }
+    if (abits >= 11 && dbits <= 5) {
+        offsets.push_back(5);
+        offsets.push_back(15);
+    }
+    if (abits >= 12 && dbits <= 2) {
+        offsets.push_back(2);
+        offsets.push_back(7);
+        offsets.push_back(12);
+        offsets.push_back(17);
+    }
+    if (abits == 13 && dbits == 1) {
+        offsets.push_back(1);
+        offsets.push_back(3);
+        offsets.push_back(6);
+        offsets.push_back(8);
+        offsets.push_back(11);
+        offsets.push_back(13);
+        offsets.push_back(16);
+        offsets.push_back(18);
+    }
+    for (int bit = 0; bit < dbits; bit++) {
+        for (int offset : offsets) {
+            cell->pin_data[ctx->id(stringf("A1DATA[%d]", bit))].bel_pins.push_back(ctx->id(stringf("DATAAIN[%d]", bit + offset)));
+        }
+    }
+
+    for (int bit = 0; bit < dbits; bit++) {
+        cell->pin_data[ctx->id(stringf("B1DATA[%d]", bit))].bel_pins = {ctx->id(stringf("DATABOUT[%d]", bit))};
+    }
+}
+
 NEXTPNR_NAMESPACE_END
\ No newline at end of file