1 files changed, 111 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/subprograms/cache.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/subprograms/cache.vhd
new file mode 100644
index 0000000..9df92fc
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+++ b/testsuite/vests/vhdl-ams/ashenden/compliant/subprograms/cache.vhd
@@ -0,0 +1,111 @@
+
+-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+-- for more details. 
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+-- not in book
+
+entity cache is
+end entity cache;
+
+-- end not in book
+
+
+
+architecture behavioral of cache is
+  -- not in book
+  subtype word is bit_vector(0 to 31);
+  signal mem_addr : natural;
+  signal mem_data_in : word;
+  signal mem_read, mem_ack : bit := '0';
+  -- end not in book
+begin
+
+  behavior : process is
+
+    -- not in book
+    constant block_size : positive := 4;
+    type cache_block is array (0 to block_size - 1) of word;
+    type store_array is array (0 to 15) of cache_block;
+    variable data_store : store_array;
+    variable entry_index : natural := 1;
+    variable miss_base_address : natural := 16;
+    -- end not in book
+
+    -- . . .
+
+    procedure read_block( start_address : natural;
+                          entry : out cache_block ) is
+
+      variable memory_address_reg : natural;
+      variable memory_data_reg : word;
+
+      procedure read_memory_word is
+      begin
+        mem_addr <= memory_address_reg;
+        mem_read <= '1';
+        wait until mem_ack = '1';
+        memory_data_reg := mem_data_in;
+        mem_read <= '0';
+        wait until mem_ack = '0';
+      end procedure read_memory_word;
+
+    begin  -- read_block
+      for offset in 0 to block_size - 1 loop
+        memory_address_reg := start_address + offset;
+        read_memory_word;
+        entry(offset) := memory_data_reg;
+      end loop;
+    end procedure read_block;
+
+  begin  -- behavior
+     -- . . .
+    read_block( miss_base_address, data_store(entry_index) );
+     -- . . .
+    -- not in book
+    wait;
+    -- end not in book
+  end process behavior;
+
+
+  -- not in book
+
+  memory : process is
+
+    type store_array is array (0 to 31) of word;
+    constant store : store_array :=
+      ( X"00000000", X"00000001", X"00000002", X"00000003",
+        X"00000004", X"00000005", X"00000006", X"00000007",
+        X"00000008", X"00000009", X"0000000a", X"0000000b",
+        X"0000000c", X"0000000d", X"0000000e", X"0000000f",
+        X"00000010", X"00000011", X"00000012", X"00000013",
+        X"00000014", X"00000015", X"00000016", X"00000017",
+        X"00000018", X"00000019", X"0000001a", X"0000001b",
+        X"0000001c", X"0000001d", X"0000001e", X"0000001f" );
+
+  begin
+    wait until mem_read = '1';
+    mem_data_in <= store(mem_addr);
+    mem_ack <= '1';
+    wait until mem_read = '0';
+    mem_ack <= '0';
+  end process memory;
+
+  -- end not in book
+
+
+end architecture behavioral;