From 7b8fcecf11813492d770a0d766fb9a9fb01be3e2 Mon Sep 17 00:00:00 2001
From: Brad Beckmann <Brad.Beckmann@amd.com>
Date: Wed, 18 Nov 2009 16:34:31 -0800
Subject: ruby: cache configuration fix to use bytes Changed cache size to be
 in bytes instead of kb so that testers can use very small caches and increase
 the chance of writeback races.

---
 src/mem/ruby/config/MI_example-homogeneous.rb | 10 ++++++++--
 src/mem/ruby/config/cfg.rb                    | 16 ++++++++--------
 src/mem/ruby/system/CacheMemory.cc            | 10 +++++++---
 3 files changed, 23 insertions(+), 13 deletions(-)

diff --git a/src/mem/ruby/config/MI_example-homogeneous.rb b/src/mem/ruby/config/MI_example-homogeneous.rb
index b7842aaaf..1ed81ee42 100644
--- a/src/mem/ruby/config/MI_example-homogeneous.rb
+++ b/src/mem/ruby/config/MI_example-homogeneous.rb
@@ -13,7 +13,7 @@ RubySystem.reset
 # default values
 
 num_cores = 2
-l1_cache_size_kb = 32
+l1_cache_size_kb = 32768
 l1_cache_assoc = 8
 l1_cache_latency = 1
 num_memories = 2
@@ -37,6 +37,12 @@ for i in 0..$*.size-1 do
   elsif $*[i] == "-s"
     memory_size_mb = $*[i+1].to_i
     i = i + 1
+  elsif $*[i] == "-C"
+    l1_cache_size_bytes = $*[i+1].to_i
+    i = i + 1
+  elsif $*[i] == "-A"
+    l1_cache_assoc = $*[i+1].to_i
+    i = i + 1
   elsif $*[i] == "-D"
     num_dma = $*[i+1].to_i
     i = i + 1
@@ -51,7 +57,7 @@ assert(protocol == "MI_example", __FILE__ + " cannot be used with protocol " + p
 require protocol+".rb"
 
 num_cores.times { |n|
-  cache = SetAssociativeCache.new("l1u_"+n.to_s, l1_cache_size_kb, l1_cache_latency, l1_cache_assoc, "PSEUDO_LRU")
+  cache = SetAssociativeCache.new("l1u_"+n.to_s, l1_cache_size_bytes, l1_cache_latency, l1_cache_assoc, "PSEUDO_LRU")
   sequencer = Sequencer.new("Sequencer_"+n.to_s, cache, cache)
   iface_ports << sequencer
   net_ports << MI_example_CacheController.new("L1CacheController_"+n.to_s,
diff --git a/src/mem/ruby/config/cfg.rb b/src/mem/ruby/config/cfg.rb
index 1c261544d..f2564e1d3 100644
--- a/src/mem/ruby/config/cfg.rb
+++ b/src/mem/ruby/config/cfg.rb
@@ -401,17 +401,17 @@ class DMAController < NetPort
 end
 
 class Cache < LibRubyObject
-  attr :size_kb, :latency
+  attr :size, :latency
   attr_writer :controller
-  def initialize(obj_name, size_kb, latency)
+  def initialize(obj_name, size, latency)
     super(obj_name)
-    assert size_kb.is_a?(Integer), "Cache size must be an integer"
-    @size_kb = size_kb
+    assert size.is_a?(Integer), "Cache size must be an integer"
+    @size = size
     @latency = latency
   end
 
   def args
-    "controller "+@controller.obj_name+" size_kb "+@size_kb.to_s+" latency "+@latency.to_s
+    "controller "+@controller.obj_name+" size "+@size.to_s+" latency "+@latency.to_s
   end
 end
 
@@ -422,8 +422,8 @@ class SetAssociativeCache < Cache
   #  when an integer, it represents the number of cycles for a hit
   #  when a float, it represents the cache access time in ns
   #  when set to "auto", libruby will attempt to find a realistic latency by running CACTI
-  def initialize(obj_name, size_kb, latency, assoc, replacement_policy)
-    super(obj_name, size_kb, latency)
+  def initialize(obj_name, size, latency, assoc, replacement_policy)
+    super(obj_name, size, latency)
     @assoc = assoc
     @replacement_policy = replacement_policy
   end
@@ -431,7 +431,7 @@ class SetAssociativeCache < Cache
   def calculateLatency()
     if @latency == "auto"
       cacti_args = Array.new()
-      cacti_args << (@size_kb*1024) <<  RubySystem.block_size_bytes << @assoc
+      cacti_args << (@size) <<  RubySystem.block_size_bytes << @assoc
       cacti_args << 1 << 0 << 0 << 0 << 1
       cacti_args << RubySystem.tech_nm << RubySystem.block_size_bytes*8
       cacti_args << 0 << 0 << 0 << 1 << 0 << 0 << 0 << 0 << 1
diff --git a/src/mem/ruby/system/CacheMemory.cc b/src/mem/ruby/system/CacheMemory.cc
index 04adbcf69..a5c881a61 100644
--- a/src/mem/ruby/system/CacheMemory.cc
+++ b/src/mem/ruby/system/CacheMemory.cc
@@ -52,12 +52,12 @@ CacheMemory::CacheMemory(const string & name)
 
 void CacheMemory::init(const vector<string> & argv)
 {
-  int cache_size = 0;
+  int cache_size = -1;
   string policy;
 
   m_controller = NULL;
   for (uint32 i=0; i<argv.size(); i+=2) {
-    if (argv[i] == "size_kb") {
+    if (argv[i] == "size") {
       cache_size = atoi(argv[i+1].c_str());
     } else if (argv[i] == "latency") {
       m_latency = atoi(argv[i+1].c_str());
@@ -72,8 +72,12 @@ void CacheMemory::init(const vector<string> & argv)
     }
   }
 
-  m_cache_num_sets = cache_size / m_cache_assoc;
+  assert(cache_size != -1);
+  
+  m_cache_num_sets = (cache_size / m_cache_assoc) / RubySystem::getBlockSizeBytes();
+  assert(m_cache_num_sets > 1);
   m_cache_num_set_bits = log_int(m_cache_num_sets);
+  assert(m_cache_num_set_bits > 0);
 
   if(policy == "PSEUDO_LRU")
     m_replacementPolicy_ptr = new PseudoLRUPolicy(m_cache_num_sets, m_cache_assoc);
-- 
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