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authorBrad Beckmann <Brad.Beckmann@amd.com>2010-03-21 21:22:21 -0700
committerBrad Beckmann <Brad.Beckmann@amd.com>2010-03-21 21:22:21 -0700
commit4f044605e8a87873228933b4700e3e0ac9af27e5 (patch)
treef540e138a27ca0a4d9d1905d4f5199b470c1508b /src/mem
parent8b15ed7ebf939688e68ed2e6b1b2099972e1d295 (diff)
downloadgem5-4f044605e8a87873228933b4700e3e0ac9af27e5.tar.xz
ruby: Adds configurable bit selection for numa mapping
Diffstat (limited to 'src/mem')
-rw-r--r--src/mem/ruby/common/Address.hh30
-rw-r--r--src/mem/ruby/system/DirectoryMemory.cc23
-rw-r--r--src/mem/ruby/system/DirectoryMemory.hh1
-rw-r--r--src/mem/ruby/system/DirectoryMemory.py1
4 files changed, 48 insertions, 7 deletions
diff --git a/src/mem/ruby/common/Address.hh b/src/mem/ruby/common/Address.hh
index 44dff7d83..7da5ed0fe 100644
--- a/src/mem/ruby/common/Address.hh
+++ b/src/mem/ruby/common/Address.hh
@@ -66,6 +66,7 @@ public:
physical_address_t getAddress() const {return m_address;}
// selects bits inclusive
physical_address_t bitSelect(int small, int big) const;
+ physical_address_t bitRemove(int small, int big) const;
physical_address_t maskLowOrderBits(int number) const;
physical_address_t maskHighOrderBits(int number) const;
physical_address_t shiftLowOrderBits(int number) const;
@@ -162,6 +163,35 @@ physical_address_t Address::bitSelect(int small, int big) const // rips bits inc
}
}
+// removes bits inclusive
+inline
+physical_address_t Address::bitRemove(int small, int big) const
+{
+ physical_address_t mask;
+ assert((unsigned)big >= (unsigned)small);
+
+ if (small >= ADDRESS_WIDTH - 1) {
+ return m_address;
+ } else if (big >= ADDRESS_WIDTH - 1) {
+ mask = (physical_address_t)~0 >> small;
+ return (m_address & mask);
+ } else if (small == 0) {
+ mask = (physical_address_t)~0 << big;
+ return (m_address & mask);
+ } else {
+ mask = ~((physical_address_t)~0 << small);
+ physical_address_t lower_bits = m_address & mask;
+ mask = (physical_address_t)~0 << (big + 1);
+ physical_address_t higher_bits = m_address & mask;
+
+ //
+ // Shift the valid high bits over the removed section
+ //
+ higher_bits = higher_bits >> (big - small);
+ return (higher_bits | lower_bits);
+ }
+}
+
inline
physical_address_t Address::maskLowOrderBits(int number) const
{
diff --git a/src/mem/ruby/system/DirectoryMemory.cc b/src/mem/ruby/system/DirectoryMemory.cc
index 2c32eacdc..d8037aec1 100644
--- a/src/mem/ruby/system/DirectoryMemory.cc
+++ b/src/mem/ruby/system/DirectoryMemory.cc
@@ -44,6 +44,7 @@
int DirectoryMemory::m_num_directories = 0;
int DirectoryMemory::m_num_directories_bits = 0;
uint64_t DirectoryMemory::m_total_size_bytes = 0;
+int DirectoryMemory::m_numa_high_bit = 0;
DirectoryMemory::DirectoryMemory(const Params *p)
: SimObject(p)
@@ -54,6 +55,7 @@ DirectoryMemory::DirectoryMemory(const Params *p)
m_num_entries = 0;
m_use_map = p->use_map;
m_map_levels = p->map_levels;
+ m_numa_high_bit = p->numa_high_bit;
}
void DirectoryMemory::init()
@@ -74,6 +76,11 @@ void DirectoryMemory::init()
m_num_directories++;
m_num_directories_bits = log_int(m_num_directories);
m_total_size_bytes += m_size_bytes;
+
+ if (m_numa_high_bit == 0) {
+ m_numa_high_bit = RubySystem::getMemorySizeBits();
+ }
+ assert(m_numa_high_bit != 0);
}
DirectoryMemory::~DirectoryMemory()
@@ -109,8 +116,9 @@ void DirectoryMemory::printGlobalConfig(ostream & out)
out << " number of directory memories: " << m_num_directories << endl;
if (m_num_directories > 1) {
out << " number of selection bits: " << m_num_directories_bits << endl;
- out << " selection bits: " << RubySystem::getBlockSizeBits()+m_num_directories_bits-1
- << "-" << RubySystem::getBlockSizeBits() << endl;
+ out << " selection bits: " << m_numa_high_bit
+ << "-" << m_numa_high_bit-m_num_directories_bits
+ << endl;
}
out << " total memory size bytes: " << m_total_size_bytes << endl;
out << " total memory bits: " << log_int(m_total_size_bytes) << endl;
@@ -120,8 +128,8 @@ void DirectoryMemory::printGlobalConfig(ostream & out)
uint64 DirectoryMemory::mapAddressToDirectoryVersion(PhysAddress address)
{
if (m_num_directories_bits == 0) return 0;
- uint64 ret = address.bitSelect(RubySystem::getBlockSizeBits(),
- RubySystem::getBlockSizeBits()+m_num_directories_bits-1);
+ uint64 ret = address.bitSelect(m_numa_high_bit - m_num_directories_bits,
+ m_numa_high_bit);
return ret;
}
@@ -134,9 +142,10 @@ bool DirectoryMemory::isPresent(PhysAddress address)
uint64 DirectoryMemory::mapAddressToLocalIdx(PhysAddress address)
{
- uint64 ret = address.getAddress()
- >> (RubySystem::getBlockSizeBits() + m_num_directories_bits);
- return ret;
+ uint64 ret = address.bitRemove(m_numa_high_bit - m_num_directories_bits,
+ m_numa_high_bit)
+ >> (RubySystem::getBlockSizeBits());
+ return ret;
}
Directory_Entry& DirectoryMemory::lookup(PhysAddress address)
diff --git a/src/mem/ruby/system/DirectoryMemory.hh b/src/mem/ruby/system/DirectoryMemory.hh
index 455329cd0..8b23ced02 100644
--- a/src/mem/ruby/system/DirectoryMemory.hh
+++ b/src/mem/ruby/system/DirectoryMemory.hh
@@ -95,6 +95,7 @@ private:
static int m_num_directories;
static int m_num_directories_bits;
static uint64_t m_total_size_bytes;
+ static int m_numa_high_bit;
MemoryVector* m_ram;
SparseMemory* m_sparseMemory;
diff --git a/src/mem/ruby/system/DirectoryMemory.py b/src/mem/ruby/system/DirectoryMemory.py
index 9892f3135..784ed628f 100644
--- a/src/mem/ruby/system/DirectoryMemory.py
+++ b/src/mem/ruby/system/DirectoryMemory.py
@@ -38,3 +38,4 @@ class RubyDirectoryMemory(SimObject):
size = Param.MemorySize("1GB", "capacity in bytes")
use_map = Param.Bool(False, "enable sparse memory")
map_levels = Param.Int(4, "sparse memory map levels")
+ numa_high_bit = Param.Int(0, "numa high bit")