diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/generic/mmapped_ipr.cc | 4 | ||||
| -rw-r--r-- | src/arch/generic/mmapped_ipr.hh | 21 | ||||
| -rw-r--r-- | src/arch/x86/tlb.cc | 2 | ||||
| -rw-r--r-- | src/mem/request.hh | 4 |
4 files changed, 13 insertions, 18 deletions
diff --git a/src/arch/generic/mmapped_ipr.cc b/src/arch/generic/mmapped_ipr.cc index 3d85eea9f..1a356a5d5 100644 --- a/src/arch/generic/mmapped_ipr.cc +++ b/src/arch/generic/mmapped_ipr.cc @@ -53,7 +53,7 @@ Cycles GenericISA::handleGenericIprRead(ThreadContext *xc, Packet *pkt) { Addr va(pkt->getAddr()); - Addr cls((va & IPR_CLASS_MASK) >> IPR_CLASS_SHIFT); + Addr cls(va >> IPR_CLASS_SHIFT); switch (cls) { case IPR_CLASS_PSEUDO_INST: @@ -70,7 +70,7 @@ Cycles GenericISA::handleGenericIprWrite(ThreadContext *xc, Packet *pkt) { Addr va(pkt->getAddr()); - Addr cls((va & IPR_CLASS_MASK) >> IPR_CLASS_SHIFT); + Addr cls(va >> IPR_CLASS_SHIFT); switch (cls) { case IPR_CLASS_PSEUDO_INST: diff --git a/src/arch/generic/mmapped_ipr.hh b/src/arch/generic/mmapped_ipr.hh index 55ce6e4d5..a371699eb 100644 --- a/src/arch/generic/mmapped_ipr.hh +++ b/src/arch/generic/mmapped_ipr.hh @@ -49,23 +49,12 @@ namespace GenericISA * Memory requests with the MMAPPED_IPR flag are generally mapped * to registers. There is a class of these registers that are * internal to gem5, for example gem5 pseudo-ops in virtualized - * mode. - * - * In order to make the IPR space manageable we always set bit 63 - * (IPR_GENERIC) for accesses that should be handled by the - * generic ISA code. Architectures may use the rest of the IPR - * space internally. + * mode. Such IPRs always have the flag GENERIC_IPR set and are + * handled by this code. */ - /** Is this a generic IPR access? */ - const Addr IPR_GENERIC = ULL(0x8000000000000000); - - /** @{ */ - /** Mask when extracting the class of a generic IPR */ - const Addr IPR_CLASS_MASK = ULL(0x7FFF000000000000); /** Shift amount when extracting the class of a generic IPR */ const int IPR_CLASS_SHIFT = 48; - /** @} */ /** Mask to extract the offset in within a generic IPR class */ const Addr IPR_IN_CLASS_MASK = ULL(0x0000FFFFFFFFFFFF); @@ -94,7 +83,7 @@ namespace GenericISA inline Addr iprAddressPseudoInst(uint8_t func, uint8_t subfunc) { - return IPR_GENERIC | (IPR_CLASS_PSEUDO_INST << IPR_CLASS_SHIFT) | + return (IPR_CLASS_PSEUDO_INST << IPR_CLASS_SHIFT) | (func << 8) | subfunc; } @@ -113,7 +102,9 @@ namespace GenericISA inline bool isGenericIprAccess(const Packet *pkt) { - return pkt->getAddr() & IPR_GENERIC; + Request::Flags flags(pkt->req->getFlags()); + return (flags & Request::MMAPPED_IPR) && + (flags & Request::GENERIC_IPR); } /** diff --git a/src/arch/x86/tlb.cc b/src/arch/x86/tlb.cc index e6ca166b3..458f33069 100644 --- a/src/arch/x86/tlb.cc +++ b/src/arch/x86/tlb.cc @@ -257,7 +257,7 @@ TLB::finalizePhysical(RequestPtr req, ThreadContext *tc, Mode mode) const req->setPaddr(x86LocalAPICAddress(tc->contextId(), paddr - apicRange.start())); } else if (m5opRange.contains(paddr)) { - req->setFlags(Request::MMAPPED_IPR); + req->setFlags(Request::MMAPPED_IPR | Request::GENERIC_IPR); req->setPaddr(GenericISA::iprAddressPseudoInst( (paddr >> 8) & 0xFF, paddr & 0xFF)); diff --git a/src/mem/request.hh b/src/mem/request.hh index ac6e3550b..c3a3f47dc 100644 --- a/src/mem/request.hh +++ b/src/mem/request.hh @@ -127,6 +127,10 @@ class Request /** The request should be marked as LRU. */ static const FlagsType EVICT_NEXT = 0x04000000; + /** The request should be handled by the generic IPR code (only + * valid together with MMAPPED_IPR) */ + static const FlagsType GENERIC_IPR = 0x08000000; + /** These flags are *not* cleared when a Request object is reused (assigned a new address). */ static const FlagsType STICKY_FLAGS = INST_FETCH; |