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-rw-r--r--src/mem/ruby/system/RubyPort.cc187
1 files changed, 2 insertions, 185 deletions
diff --git a/src/mem/ruby/system/RubyPort.cc b/src/mem/ruby/system/RubyPort.cc
index f269f17fe..dcedc7841 100644
--- a/src/mem/ruby/system/RubyPort.cc
+++ b/src/mem/ruby/system/RubyPort.cc
@@ -234,189 +234,6 @@ RubyPort::M5Port::recvTimingReq(PacketPtr pkt)
return false;
}
-bool
-RubyPort::M5Port::doFunctionalRead(PacketPtr pkt)
-{
- Address address(pkt->getAddr());
- Address line_address(address);
- line_address.makeLineAddress();
-
- AccessPermission access_perm = AccessPermission_NotPresent;
- int num_controllers = ruby_system->m_abs_cntrl_vec.size();
-
- DPRINTF(RubyPort, "Functional Read request for %s\n",address);
-
- unsigned int num_ro = 0;
- unsigned int num_rw = 0;
- unsigned int num_busy = 0;
- unsigned int num_backing_store = 0;
- unsigned int num_invalid = 0;
-
- // In this loop we count the number of controllers that have the given
- // address in read only, read write and busy states.
- for (int i = 0; i < num_controllers; ++i) {
- access_perm = ruby_system->m_abs_cntrl_vec[i]->
- getAccessPermission(line_address);
- if (access_perm == AccessPermission_Read_Only)
- num_ro++;
- else if (access_perm == AccessPermission_Read_Write)
- num_rw++;
- else if (access_perm == AccessPermission_Busy)
- num_busy++;
- else if (access_perm == AccessPermission_Backing_Store)
- // See RubySlicc_Exports.sm for details, but Backing_Store is meant
- // to represent blocks in memory *for Broadcast/Snooping protocols*,
- // where memory has no idea whether it has an exclusive copy of data
- // or not.
- num_backing_store++;
- else if (access_perm == AccessPermission_Invalid ||
- access_perm == AccessPermission_NotPresent)
- num_invalid++;
- }
- assert(num_rw <= 1);
-
- uint8_t *data = pkt->getPtr<uint8_t>(true);
- unsigned int size_in_bytes = pkt->getSize();
- unsigned startByte = address.getAddress() - line_address.getAddress();
-
- // This if case is meant to capture what happens in a Broadcast/Snoop
- // protocol where the block does not exist in the cache hierarchy. You
- // only want to read from the Backing_Store memory if there is no copy in
- // the cache hierarchy, otherwise you want to try to read the RO or RW
- // copies existing in the cache hierarchy (covered by the else statement).
- // The reason is because the Backing_Store memory could easily be stale, if
- // there are copies floating around the cache hierarchy, so you want to read
- // it only if it's not in the cache hierarchy at all.
- if (num_invalid == (num_controllers - 1) &&
- num_backing_store == 1)
- {
- DPRINTF(RubyPort, "only copy in Backing_Store memory, read from it\n");
- for (int i = 0; i < num_controllers; ++i) {
- access_perm = ruby_system->m_abs_cntrl_vec[i]
- ->getAccessPermission(line_address);
- if (access_perm == AccessPermission_Backing_Store) {
- DataBlock& block = ruby_system->m_abs_cntrl_vec[i]
- ->getDataBlock(line_address);
-
- DPRINTF(RubyPort, "reading from %s block %s\n",
- ruby_system->m_abs_cntrl_vec[i]->name(), block);
- for (unsigned i = 0; i < size_in_bytes; ++i) {
- data[i] = block.getByte(i + startByte);
- }
- return true;
- }
- }
- } else {
- // In Broadcast/Snoop protocols, this covers if you know the block
- // exists somewhere in the caching hierarchy, then you want to read any
- // valid RO or RW block. In directory protocols, same thing, you want
- // to read any valid readable copy of the block.
- DPRINTF(RubyPort, "num_busy = %d, num_ro = %d, num_rw = %d\n",
- num_busy, num_ro, num_rw);
- // In this loop, we try to figure which controller has a read only or
- // a read write copy of the given address. Any valid copy would suffice
- // for a functional read.
- for(int i = 0;i < num_controllers;++i) {
- access_perm = ruby_system->m_abs_cntrl_vec[i]
- ->getAccessPermission(line_address);
- if(access_perm == AccessPermission_Read_Only ||
- access_perm == AccessPermission_Read_Write)
- {
- DataBlock& block = ruby_system->m_abs_cntrl_vec[i]
- ->getDataBlock(line_address);
-
- DPRINTF(RubyPort, "reading from %s block %s\n",
- ruby_system->m_abs_cntrl_vec[i]->name(), block);
- for (unsigned i = 0; i < size_in_bytes; ++i) {
- data[i] = block.getByte(i + startByte);
- }
- return true;
- }
- }
- }
- return false;
-}
-
-bool
-RubyPort::M5Port::doFunctionalWrite(PacketPtr pkt)
-{
- Address addr(pkt->getAddr());
- Address line_addr = line_address(addr);
- AccessPermission access_perm = AccessPermission_NotPresent;
- int num_controllers = ruby_system->m_abs_cntrl_vec.size();
-
- DPRINTF(RubyPort, "Functional Write request for %s\n",addr);
-
- unsigned int num_ro = 0;
- unsigned int num_rw = 0;
- unsigned int num_busy = 0;
- unsigned int num_backing_store = 0;
- unsigned int num_invalid = 0;
-
- // In this loop we count the number of controllers that have the given
- // address in read only, read write and busy states.
- for(int i = 0;i < num_controllers;++i) {
- access_perm = ruby_system->m_abs_cntrl_vec[i]->
- getAccessPermission(line_addr);
- if (access_perm == AccessPermission_Read_Only)
- num_ro++;
- else if (access_perm == AccessPermission_Read_Write)
- num_rw++;
- else if (access_perm == AccessPermission_Busy)
- num_busy++;
- else if (access_perm == AccessPermission_Backing_Store)
- // See RubySlicc_Exports.sm for details, but Backing_Store is meant
- // to represent blocks in memory *for Broadcast/Snooping protocols*,
- // where memory has no idea whether it has an exclusive copy of data
- // or not.
- num_backing_store++;
- else if (access_perm == AccessPermission_Invalid ||
- access_perm == AccessPermission_NotPresent)
- num_invalid++;
- }
-
- // If the number of read write copies is more than 1, then there is bug in
- // coherence protocol. Otherwise, if all copies are in stable states, i.e.
- // num_busy == 0, we update all the copies. If there is at least one copy
- // in busy state, then we check if there is read write copy. If yes, then
- // also we let the access go through. Or, if there is no copy in the cache
- // hierarchy at all, we still want to do the write to the memory
- // (Backing_Store) instead of failing.
-
- DPRINTF(RubyPort, "num_busy = %d, num_ro = %d, num_rw = %d\n",
- num_busy, num_ro, num_rw);
- assert(num_rw <= 1);
-
- uint8_t *data = pkt->getPtr<uint8_t>(true);
- unsigned int size_in_bytes = pkt->getSize();
- unsigned startByte = addr.getAddress() - line_addr.getAddress();
-
- if ((num_busy == 0 && num_ro > 0) || num_rw == 1 ||
- (num_invalid == (num_controllers - 1) && num_backing_store == 1))
- {
- for(int i = 0; i < num_controllers;++i) {
- access_perm = ruby_system->m_abs_cntrl_vec[i]->
- getAccessPermission(line_addr);
- if(access_perm == AccessPermission_Read_Only ||
- access_perm == AccessPermission_Read_Write||
- access_perm == AccessPermission_Maybe_Stale ||
- access_perm == AccessPermission_Backing_Store)
- {
- DataBlock& block = ruby_system->m_abs_cntrl_vec[i]
- ->getDataBlock(line_addr);
-
- DPRINTF(RubyPort, "%s\n",block);
- for (unsigned i = 0; i < size_in_bytes; ++i) {
- block.setByte(i + startByte, data[i]);
- }
- DPRINTF(RubyPort, "%s\n",block);
- }
- }
- return true;
- }
- return false;
-}
-
void
RubyPort::M5Port::recvFunctional(PacketPtr pkt)
{
@@ -441,9 +258,9 @@ RubyPort::M5Port::recvFunctional(PacketPtr pkt)
// Do the functional access on ruby memory
if (pkt->isRead()) {
- accessSucceeded = doFunctionalRead(pkt);
+ accessSucceeded = ruby_system->functionalRead(pkt);
} else if (pkt->isWrite()) {
- accessSucceeded = doFunctionalWrite(pkt);
+ accessSucceeded = ruby_system->functionalWrite(pkt);
} else {
panic("RubyPort: unsupported functional command %s\n",
pkt->cmdString());
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-28 20:45:17 +0000