mem: Set the cache line size on a system level

This patch removes the notion of a peer block size and instead sets
the cache line size on the system level.

Previously the size was set per cache, and communicated through the
interconnect. There were plenty checks to ensure that everyone had the
same size specified, and these checks are now removed. Another benefit
that is not yet harnessed is that the cache line size is now known at
construction time, rather than after the port binding. Hence, the
block size can be locally stored and does not have to be queried every
time it is used.

A follow-on patch updates the configuration scripts accordingly.

2 files changed, 4 insertions, 8 deletions

diff --git a/src/cpu/simple/atomic.cc b/src/cpu/simple/atomic.cc
index 1dd9675f9..ffd1c4d43 100644
--- a/src/cpu/simple/atomic.cc
+++ b/src/cpu/simple/atomic.cc
@@ -287,14 +287,12 @@ AtomicSimpleCPU::readMem(Addr addr, uint8_t * data,
         traceData->setAddr(addr);
     }
 
-    //The block size of our peer.
-    unsigned blockSize = dcachePort.peerBlockSize();
     //The size of the data we're trying to read.
     int fullSize = size;
 
     //The address of the second part of this access if it needs to be split
     //across a cache line boundary.
-    Addr secondAddr = roundDown(addr + size - 1, blockSize);
+    Addr secondAddr = roundDown(addr + size - 1, cacheLineSize());
 
     if (secondAddr > addr)
         size = secondAddr - addr;
@@ -375,14 +373,12 @@ AtomicSimpleCPU::writeMem(uint8_t *data, unsigned size,
         traceData->setAddr(addr);
     }
 
-    //The block size of our peer.
-    unsigned blockSize = dcachePort.peerBlockSize();
     //The size of the data we're trying to read.
     int fullSize = size;
 
     //The address of the second part of this access if it needs to be split
     //across a cache line boundary.
-    Addr secondAddr = roundDown(addr + size - 1, blockSize);
+    Addr secondAddr = roundDown(addr + size - 1, cacheLineSize());
 
     if(secondAddr > addr)
         size = secondAddr - addr;
diff --git a/src/cpu/simple/timing.cc b/src/cpu/simple/timing.cc
index 1f453ca63..87a5245b2 100644
--- a/src/cpu/simple/timing.cc
+++ b/src/cpu/simple/timing.cc
@@ -404,7 +404,7 @@ TimingSimpleCPU::readMem(Addr addr, uint8_t *data,
     const int asid = 0;
     const ThreadID tid = 0;
     const Addr pc = thread->instAddr();
-    unsigned block_size = dcachePort.peerBlockSize();
+    unsigned block_size = cacheLineSize();
     BaseTLB::Mode mode = BaseTLB::Read;
 
     if (traceData) {
@@ -473,7 +473,7 @@ TimingSimpleCPU::writeMem(uint8_t *data, unsigned size,
     const int asid = 0;
     const ThreadID tid = 0;
     const Addr pc = thread->instAddr();
-    unsigned block_size = dcachePort.peerBlockSize();
+    unsigned block_size = cacheLineSize();
     BaseTLB::Mode mode = BaseTLB::Write;
 
     if (traceData) {