gem5  v21.1.0.2
translating_port_proxy.cc
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40 
47 
48 #include "arch/generic/mmu.hh"
49 #include "base/chunk_generator.hh"
50 #include "cpu/base.hh"
51 #include "cpu/thread_context.hh"
52 #include "sim/system.hh"
53 
54 namespace gem5
55 {
56 
58  ThreadContext *tc, Request::Flags _flags) :
59  PortProxy(tc, tc->getSystemPtr()->cacheLineSize()), _tc(tc),
60  pageBytes(tc->getSystemPtr()->getPageBytes()),
61  flags(_flags)
62 {}
63 
64 bool
66 {
67  BaseMMU *mmu = _tc->getMMUPtr();
68  return mmu->translateFunctional(req, _tc, mode) == NoFault ||
70 }
71 
72 bool
74 {
75  // If at first this doesn't succeed, try to fixup and translate again. If
76  // it still fails, report failure.
77  return tryTLBsOnce(req, mode) ||
78  (fixupAddr(req->getVaddr(), mode) && tryTLBsOnce(req, mode));
79 }
80 
81 bool
83 {
84  for (ChunkGenerator gen(addr, size, pageBytes); !gen.done();
85  gen.next())
86  {
87  auto req = std::make_shared<Request>(
88  gen.addr(), gen.size(), flags, Request::funcRequestorId, 0,
89  _tc->contextId());
90 
91  if (!tryTLBs(req, BaseMMU::Read))
92  return false;
93 
95  req->getPaddr(), req->getFlags(), p, gen.size());
96 
97  p = static_cast<uint8_t *>(p) + gen.size();
98  }
99  return true;
100 }
101 
102 bool
104  Addr addr, const void *p, int size) const
105 {
106  for (ChunkGenerator gen(addr, size, pageBytes); !gen.done();
107  gen.next())
108  {
109  auto req = std::make_shared<Request>(
110  gen.addr(), gen.size(), flags, Request::funcRequestorId, 0,
111  _tc->contextId());
112 
113  if (!tryTLBs(req, BaseMMU::Write))
114  return false;
115 
117  req->getPaddr(), req->getFlags(), p, gen.size());
118  p = static_cast<const uint8_t *>(p) + gen.size();
119  }
120  return true;
121 }
122 
123 bool
124 TranslatingPortProxy::tryMemsetBlob(Addr address, uint8_t v, int size) const
125 {
126  for (ChunkGenerator gen(address, size, pageBytes); !gen.done();
127  gen.next())
128  {
129  auto req = std::make_shared<Request>(
130  gen.addr(), gen.size(), flags, Request::funcRequestorId, 0,
131  _tc->contextId());
132 
133  if (!tryTLBs(req, BaseMMU::Write))
134  return false;
135 
137  req->getPaddr(), req->getFlags(), v, gen.size());
138  }
139  return true;
140 }
141 
142 } // namespace gem5
gem5::TranslatingPortProxy::tryMemsetBlob
bool tryMemsetBlob(Addr address, uint8_t v, int size) const override
Fill size bytes starting at addr with byte value val.
Definition: translating_port_proxy.cc:124
gem5::BaseMMU::Read
@ Read
Definition: mmu.hh:53
gem5::NoFault
constexpr decltype(nullptr) NoFault
Definition: types.hh:260
system.hh
gem5::BaseMMU::Mode
Mode
Definition: mmu.hh:53
gem5::BaseMMU::Write
@ Write
Definition: mmu.hh:53
gem5::ThreadContext::getMMUPtr
virtual BaseMMU * getMMUPtr()=0
translating_port_proxy.hh
gem5::PortProxy::memsetBlobPhys
void memsetBlobPhys(Addr addr, Request::Flags flags, uint8_t v, int size) const
Fill size bytes starting at physical addr with byte value val.
Definition: port_proxy.cc:92
gem5::ThreadContext::contextId
virtual ContextID contextId() const =0
gem5::TranslatingPortProxy::fixupAddr
virtual bool fixupAddr(Addr addr, BaseMMU::Mode mode) const
Definition: translating_port_proxy.hh:71
gem5::BaseMMU::Execute
@ Execute
Definition: mmu.hh:53
gem5::BaseMMU
Definition: mmu.hh:50
gem5::BaseMMU::translateFunctional
Fault translateFunctional(const RequestPtr &req, ThreadContext *tc, Mode mode)
Definition: mmu.cc:79
gem5::ChunkGenerator
This class takes an arbitrary memory region (address/length pair) and generates a series of appropria...
Definition: chunk_generator.hh:59
gem5::Flags< FlagsType >
gem5::ChunkGenerator::done
bool done() const
Are we done? That is, did the last call to next() advance past the end of the region?
Definition: chunk_generator.hh:141
gem5::ThreadContext
ThreadContext is the external interface to all thread state for anything outside of the CPU.
Definition: thread_context.hh:93
gem5::TranslatingPortProxy::pageBytes
const Addr pageBytes
Definition: translating_port_proxy.hh:66
gem5::TranslatingPortProxy::tryWriteBlob
bool tryWriteBlob(Addr addr, const void *p, int size) const override
Version of tryWriteBlob that translates virt->phys and deals with page boundries.
Definition: translating_port_proxy.cc:103
gem5::MipsISA::p
Bitfield< 0 > p
Definition: pra_constants.hh:326
gem5::ArmISA::v
Bitfield< 28 > v
Definition: misc_types.hh:54
gem5::RequestPtr
std::shared_ptr< Request > RequestPtr
Definition: request.hh:92
mmu.hh
gem5::PortProxy
This object is a proxy for a port or other object which implements the functional response protocol,...
Definition: port_proxy.hh:86
gem5::PortProxy::writeBlobPhys
void writeBlobPhys(Addr addr, Request::Flags flags, const void *p, int size) const
Write size bytes from p to physical address.
Definition: port_proxy.cc:75
gem5::Addr
uint64_t Addr
Address type This will probably be moved somewhere else in the near future.
Definition: types.hh:147
gem5::TranslatingPortProxy::tryTLBs
bool tryTLBs(RequestPtr req, BaseMMU::Mode) const
Definition: translating_port_proxy.cc:73
gem5::TranslatingPortProxy::tryReadBlob
bool tryReadBlob(Addr addr, void *p, int size) const override
Version of tryReadblob that translates virt->phys and deals with page boundries.
Definition: translating_port_proxy.cc:82
gem5::Request::funcRequestorId
@ funcRequestorId
This requestor id is used for functional requests that don't come from a particular device.
Definition: request.hh:260
base.hh
gem5::TranslatingPortProxy::flags
Request::Flags flags
Definition: translating_port_proxy.hh:68
gem5::PortProxy::readBlobPhys
void readBlobPhys(Addr addr, Request::Flags flags, void *p, int size) const
Fixed functionality for use in base classes.
Definition: port_proxy.cc:58
chunk_generator.hh
gem5::TranslatingPortProxy::tryTLBsOnce
bool tryTLBsOnce(RequestPtr req, BaseMMU::Mode) const
Definition: translating_port_proxy.cc:65
gem5::TranslatingPortProxy::TranslatingPortProxy
TranslatingPortProxy(ThreadContext *tc, Request::Flags _flags=0)
Definition: translating_port_proxy.cc:57
gem5::TranslatingPortProxy::_tc
ThreadContext * _tc
Definition: translating_port_proxy.hh:65
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
thread_context.hh
gem5::ArmISA::mode
Bitfield< 4, 0 > mode
Definition: misc_types.hh:73
gem5::X86ISA::addr
Bitfield< 3 > addr
Definition: types.hh:84

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