diff options
Diffstat (limited to 'src/mem/abstract_mem.cc')
| -rw-r--r-- | src/mem/abstract_mem.cc | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/src/mem/abstract_mem.cc b/src/mem/abstract_mem.cc index e05296c3e..13a0873cb 100644 --- a/src/mem/abstract_mem.cc +++ b/src/mem/abstract_mem.cc @@ -1,5 +1,5 @@ /* - * Copyright (c) 2010-2012 ARM Limited + * Copyright (c) 2010-2012,2017 ARM Limited * All rights reserved * * The license below extends only to copyright in the software and shall @@ -46,6 +46,7 @@ #include <vector> +#include "arch/locked_mem.hh" #include "cpu/base.hh" #include "cpu/thread_context.hh" #include "debug/LLSC.hh" @@ -272,13 +273,12 @@ AbstractMemory::checkLockedAddrList(PacketPtr pkt) if (i->addr == paddr) { DPRINTF(LLSC, "Erasing lock record: context %d addr %#x\n", i->contextId, paddr); - // For ARM, a spinlock would typically include a Wait - // For Event (WFE) to conserve energy. The ARMv8 - // architecture specifies that an event is - // automatically generated when clearing the exclusive - // monitor to wake up the processor in WFE. - ThreadContext* ctx = system()->getThreadContext(i->contextId); - ctx->getCpuPtr()->wakeup(ctx->threadId()); + ContextID owner_cid = i->contextId; + ContextID requester_cid = pkt->req->contextId(); + if (owner_cid != requester_cid) { + ThreadContext* ctx = system()->getThreadContext(owner_cid); + TheISA::globalClearExclusive(ctx); + } i = lockedAddrList.erase(i); } else { i++; @@ -387,6 +387,9 @@ AbstractMemory::access(PacketPtr pkt) } else if (pkt->isRead()) { assert(!pkt->isWrite()); if (pkt->isLLSC()) { + assert(!pkt->fromCache()); + // if the packet is not coming from a cache then we have + // to do the LL/SC tracking here trackLoadLocked(pkt); } if (pmemAddr) |