Index width adaptation to cache size and assoc (#643)

Signed-off-by: Emeric Poulin <emeric.poulin@thalesgroup.com>
openhwgroup · May 26, 2021 · 485662f · 485662f
1 parent 6963fe9
commit 485662f
Showing 1 changed file with 7 additions and 6 deletions.
diff --git a/include/ariane_pkg.sv b/include/ariane_pkg.sv
@@ -417,17 +417,18 @@ package ariane_pkg;
     localparam int unsigned DCACHE_INDEX_WIDTH = $clog2(`CONFIG_L1D_SIZE / DCACHE_SET_ASSOC);
     localparam int unsigned DCACHE_TAG_WIDTH   = riscv::PLEN - DCACHE_INDEX_WIDTH;
 `else
-    // align to openpiton for the time being (this should be more configurable in the future)
-     // I$
-    localparam int unsigned ICACHE_INDEX_WIDTH = 12;  // in bit
+    // I$
+		localparam int unsigned CONFIG_L1I_SIZE    = 16*1024;
+    localparam int unsigned ICACHE_SET_ASSOC   = 4;
+    localparam int unsigned ICACHE_INDEX_WIDTH = $clog2(CONFIG_L1I_SIZE / ICACHE_SET_ASSOC);  // in bit, contains also offset width
     localparam int unsigned ICACHE_TAG_WIDTH   = riscv::PLEN-ICACHE_INDEX_WIDTH;  // in bit
     localparam int unsigned ICACHE_LINE_WIDTH  = 128; // in bit
-    localparam int unsigned ICACHE_SET_ASSOC   = 4;
     // D$
-    localparam int unsigned DCACHE_INDEX_WIDTH = 12;  // in bit
+		localparam int unsigned CONFIG_L1D_SIZE    = 32*1024;
+	  localparam int unsigned DCACHE_SET_ASSOC   = 8;
+    localparam int unsigned DCACHE_INDEX_WIDTH = $clog2(CONFIG_L1D_SIZE / DCACHE_SET_ASSOC);  // in bit, contains also offset width
     localparam int unsigned DCACHE_TAG_WIDTH   = riscv::PLEN-DCACHE_INDEX_WIDTH;  // in bit
     localparam int unsigned DCACHE_LINE_WIDTH  = 128; // in bit
-    localparam int unsigned DCACHE_SET_ASSOC   = 8;
 `endif
 
     // ---------------