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-rw-r--r--src/mem/physical.cc208
1 files changed, 98 insertions, 110 deletions
diff --git a/src/mem/physical.cc b/src/mem/physical.cc
index 9d840fe69..93cba96c4 100644
--- a/src/mem/physical.cc
+++ b/src/mem/physical.cc
@@ -58,8 +58,9 @@ PhysicalMemory::PhysicalMemory(Params *p)
panic("Memory Size not divisible by page size\n");
int map_flags = MAP_ANON | MAP_PRIVATE;
- pmemAddr = (uint8_t *)mmap(NULL, params()->addrRange.size(), PROT_READ | PROT_WRITE,
- map_flags, -1, 0);
+ pmemAddr =
+ (uint8_t *)mmap(NULL, params()->addrRange.size(),
+ PROT_READ | PROT_WRITE, map_flags, -1, 0);
if (pmemAddr == (void *)MAP_FAILED) {
perror("mmap");
@@ -121,8 +122,9 @@ PhysicalMemory::calculateLatency(PacketPtr pkt)
// Add load-locked to tracking list. Should only be called if the
// operation is a load and the LOCKED flag is set.
void
-PhysicalMemory::trackLoadLocked(Request *req)
+PhysicalMemory::trackLoadLocked(PacketPtr pkt)
{
+ Request *req = pkt->req;
Addr paddr = LockedAddr::mask(req->getPaddr());
// first we check if we already have a locked addr for this
@@ -151,10 +153,11 @@ PhysicalMemory::trackLoadLocked(Request *req)
// conflict with locked addresses, and for success/failure of store
// conditionals.
bool
-PhysicalMemory::checkLockedAddrList(Request *req)
+PhysicalMemory::checkLockedAddrList(PacketPtr pkt)
{
+ Request *req = pkt->req;
Addr paddr = LockedAddr::mask(req->getPaddr());
- bool isLocked = req->isLocked();
+ bool isLocked = pkt->isLocked();
// Initialize return value. Non-conditional stores always
// succeed. Assume conditional stores will fail until proven
@@ -198,74 +201,50 @@ PhysicalMemory::checkLockedAddrList(Request *req)
return success;
}
-void
-PhysicalMemory::doFunctionalAccess(PacketPtr pkt)
+
+#if TRACING_ON
+
+#define CASE(A, T) \
+ case sizeof(T): \
+ DPRINTF(MemoryAccess, A " of size %i on address 0x%x data 0x%x\n", \
+ pkt->getSize(), pkt->getAddr(), pkt->get<T>()); \
+ break
+
+
+#define TRACE_PACKET(A) \
+ do { \
+ switch (pkt->getSize()) { \
+ CASE(A, uint64_t); \
+ CASE(A, uint32_t); \
+ CASE(A, uint16_t); \
+ CASE(A, uint8_t); \
+ default: \
+ DPRINTF(MemoryAccess, A " of size %i on address 0x%x\n", \
+ pkt->getSize(), pkt->getAddr()); \
+ } \
+ } while (0)
+
+#else
+
+#define TRACE_PACKET(A)
+
+#endif
+
+Tick
+PhysicalMemory::doAtomicAccess(PacketPtr pkt)
{
assert(pkt->getAddr() >= start() &&
pkt->getAddr() + pkt->getSize() <= start() + size());
- if (pkt->isRead()) {
- if (pkt->req->isLocked()) {
- trackLoadLocked(pkt->req);
- }
- memcpy(pkt->getPtr<uint8_t>(), pmemAddr + pkt->getAddr() - start(),
- pkt->getSize());
-#if TRACING_ON
- switch (pkt->getSize()) {
- case sizeof(uint64_t):
- DPRINTF(MemoryAccess, "Read of size %i on address 0x%x data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint64_t>());
- break;
- case sizeof(uint32_t):
- DPRINTF(MemoryAccess, "Read of size %i on address 0x%x data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint32_t>());
- break;
- case sizeof(uint16_t):
- DPRINTF(MemoryAccess, "Read of size %i on address 0x%x data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint16_t>());
- break;
- case sizeof(uint8_t):
- DPRINTF(MemoryAccess, "Read of size %i on address 0x%x data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint8_t>());
- break;
- default:
- DPRINTF(MemoryAccess, "Read of size %i on address 0x%x\n",
- pkt->getSize(), pkt->getAddr());
- }
-#endif
+ if (pkt->memInhibitAsserted()) {
+ DPRINTF(MemoryAccess, "mem inhibited on 0x%x: not responding\n",
+ pkt->getAddr());
+ return 0;
}
- else if (pkt->isWrite()) {
- if (writeOK(pkt->req)) {
- memcpy(pmemAddr + pkt->getAddr() - start(), pkt->getPtr<uint8_t>(),
- pkt->getSize());
-#if TRACING_ON
- switch (pkt->getSize()) {
- case sizeof(uint64_t):
- DPRINTF(MemoryAccess, "Write of size %i on address 0x%x data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint64_t>());
- break;
- case sizeof(uint32_t):
- DPRINTF(MemoryAccess, "Write of size %i on address 0x%x data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint32_t>());
- break;
- case sizeof(uint16_t):
- DPRINTF(MemoryAccess, "Write of size %i on address 0x%x data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint16_t>());
- break;
- case sizeof(uint8_t):
- DPRINTF(MemoryAccess, "Write of size %i on address 0x%x data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint8_t>());
- break;
- default:
- DPRINTF(MemoryAccess, "Write of size %i on address 0x%x\n",
- pkt->getSize(), pkt->getAddr());
- }
-#endif
- }
- } else if (pkt->isInvalidate()) {
- //upgrade or invalidate
- pkt->flags |= SATISFIED;
- } else if (pkt->isReadWrite()) {
+
+ uint8_t *hostAddr = pmemAddr + pkt->getAddr() - start();
+
+ if (pkt->cmd == MemCmd::SwapReq) {
IntReg overwrite_val;
bool overwrite_mem;
uint64_t condition_val64;
@@ -277,66 +256,76 @@ PhysicalMemory::doFunctionalAccess(PacketPtr pkt)
// keep a copy of our possible write value, and copy what is at the
// memory address into the packet
std::memcpy(&overwrite_val, pkt->getPtr<uint8_t>(), pkt->getSize());
- std::memcpy(pkt->getPtr<uint8_t>(), pmemAddr + pkt->getAddr() - start(),
- pkt->getSize());
+ std::memcpy(pkt->getPtr<uint8_t>(), hostAddr, pkt->getSize());
if (pkt->req->isCondSwap()) {
if (pkt->getSize() == sizeof(uint64_t)) {
condition_val64 = pkt->req->getExtraData();
- overwrite_mem = !std::memcmp(&condition_val64, pmemAddr +
- pkt->getAddr() - start(), sizeof(uint64_t));
+ overwrite_mem = !std::memcmp(&condition_val64, hostAddr,
+ sizeof(uint64_t));
} else if (pkt->getSize() == sizeof(uint32_t)) {
condition_val32 = (uint32_t)pkt->req->getExtraData();
- overwrite_mem = !std::memcmp(&condition_val32, pmemAddr +
- pkt->getAddr() - start(), sizeof(uint32_t));
+ overwrite_mem = !std::memcmp(&condition_val32, hostAddr,
+ sizeof(uint32_t));
} else
panic("Invalid size for conditional read/write\n");
}
if (overwrite_mem)
- std::memcpy(pmemAddr + pkt->getAddr() - start(),
- &overwrite_val, pkt->getSize());
+ std::memcpy(hostAddr, &overwrite_val, pkt->getSize());
-#if TRACING_ON
- switch (pkt->getSize()) {
- case sizeof(uint64_t):
- DPRINTF(MemoryAccess, "Read/Write of size %i on address 0x%x old data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint64_t>());
- DPRINTF(MemoryAccess, "New Data 0x%x %s conditional (0x%x) and %s \n",
- overwrite_mem, pkt->req->isCondSwap() ? "was" : "wasn't",
- condition_val64, overwrite_mem ? "happened" : "didn't happen");
- break;
- case sizeof(uint32_t):
- DPRINTF(MemoryAccess, "Read/Write of size %i on address 0x%x old data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint32_t>());
- DPRINTF(MemoryAccess, "New Data 0x%x %s conditional (0x%x) and %s \n",
- overwrite_mem, pkt->req->isCondSwap() ? "was" : "wasn't",
- condition_val32, overwrite_mem ? "happened" : "didn't happen");
- break;
- case sizeof(uint16_t):
- DPRINTF(MemoryAccess, "Read/Write of size %i on address 0x%x old data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint16_t>());
- DPRINTF(MemoryAccess, "New Data 0x%x wasn't conditional and happned\n",
- overwrite_mem);
- break;
- case sizeof(uint8_t):
- DPRINTF(MemoryAccess, "Read/Write of size %i on address 0x%x old data 0x%x\n",
- pkt->getSize(), pkt->getAddr(),pkt->get<uint8_t>());
- DPRINTF(MemoryAccess, "New Data 0x%x wasn't conditional and happned\n",
- overwrite_mem);
- break;
- default:
- DPRINTF(MemoryAccess, "Read/Write of size %i on address 0x%x\n",
- pkt->getSize(), pkt->getAddr());
+ TRACE_PACKET("Read/Write");
+ } else if (pkt->isRead()) {
+ assert(!pkt->isWrite());
+ if (pkt->isLocked()) {
+ trackLoadLocked(pkt);
+ }
+ memcpy(pkt->getPtr<uint8_t>(), hostAddr, pkt->getSize());
+ TRACE_PACKET("Read");
+ } else if (pkt->isWrite()) {
+ if (writeOK(pkt)) {
+ memcpy(hostAddr, pkt->getPtr<uint8_t>(), pkt->getSize());
+ TRACE_PACKET("Write");
+ }
+ } else if (pkt->isInvalidate()) {
+ //upgrade or invalidate
+ if (pkt->needsResponse()) {
+ pkt->makeAtomicResponse();
}
-#endif
} else {
panic("unimplemented");
}
+ if (pkt->needsResponse()) {
+ pkt->makeAtomicResponse();
+ }
+ return calculateLatency(pkt);
+}
+
+
+void
+PhysicalMemory::doFunctionalAccess(PacketPtr pkt)
+{
+ assert(pkt->getAddr() >= start() &&
+ pkt->getAddr() + pkt->getSize() <= start() + size());
+
+ uint8_t *hostAddr = pmemAddr + pkt->getAddr() - start();
+
+ if (pkt->cmd == MemCmd::ReadReq) {
+ memcpy(pkt->getPtr<uint8_t>(), hostAddr, pkt->getSize());
+ TRACE_PACKET("Read");
+ } else if (pkt->cmd == MemCmd::WriteReq) {
+ memcpy(hostAddr, pkt->getPtr<uint8_t>(), pkt->getSize());
+ TRACE_PACKET("Write");
+ } else {
+ panic("PhysicalMemory: unimplemented functional command %s",
+ pkt->cmdString());
+ }
+
pkt->result = Packet::Success;
}
+
Port *
PhysicalMemory::getPort(const std::string &if_name, int idx)
{
@@ -407,8 +396,7 @@ PhysicalMemory::MemoryPort::deviceBlockSize()
Tick
PhysicalMemory::MemoryPort::recvAtomic(PacketPtr pkt)
{
- memory->doFunctionalAccess(pkt);
- return memory->calculateLatency(pkt);
+ return memory->doAtomicAccess(pkt);
}
void
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-17 03:29:20 +0000