gem5  v22.0.0.1
translating_port_proxy.cc
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2011,2013 ARM Limited
3  * All rights reserved
4  *
5  * The license below extends only to copyright in the software and shall
6  * not be construed as granting a license to any other intellectual
7  * property including but not limited to intellectual property relating
8  * to a hardware implementation of the functionality of the software
9  * licensed hereunder. You may use the software subject to the license
10  * terms below provided that you ensure that this notice is replicated
11  * unmodified and in its entirety in all distributions of the software,
12  * modified or unmodified, in source code or in binary form.
13  *
14  * Copyright (c) 2006 The Regents of The University of Michigan
15  * All rights reserved.
16  *
17  * Redistribution and use in source and binary forms, with or without
18  * modification, are permitted provided that the following conditions are
19  * met: redistributions of source code must retain the above copyright
20  * notice, this list of conditions and the following disclaimer;
21  * redistributions in binary form must reproduce the above copyright
22  * notice, this list of conditions and the following disclaimer in the
23  * documentation and/or other materials provided with the distribution;
24  * neither the name of the copyright holders nor the names of its
25  * contributors may be used to endorse or promote products derived from
26  * this software without specific prior written permission.
27  *
28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39  */
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), flags(_flags)
60 {}
61 
62 bool
64  std::function<void(const TranslationGen::Range &)> func) const
65 {
66  // Wether we're trying to get past a fault.
67  bool faulting = false;
68  for (const auto &range: *gen) {
69  // Was there a fault this time?
70  if (range.fault) {
71  // If there was a fault last time too, or the fixup this time
72  // fails, then the operation has failed.
73  if (faulting || !fixupRange(range, mode))
74  return false;
75  // This must be the first time we've tried this translation, so
76  // record that we're making a second attempt and continue.
77  faulting = true;
78  continue;
79  }
80 
81  // Run func() on this successful translation.
82  faulting = false;
83  func(range);
84  }
85  return true;
86 }
87 
88 bool
90 {
91  constexpr auto mode = BaseMMU::Read;
93  addr, size, _tc, mode, flags),
94  [this, &p](const auto &range) {
95  PortProxy::readBlobPhys(range.paddr, flags, p, range.size);
96  p = static_cast<uint8_t *>(p) + range.size;
97  });
98 }
99 
100 bool
102  Addr addr, const void *p, int size) const
103 {
104  constexpr auto mode = BaseMMU::Write;
106  addr, size, _tc, mode, flags),
107  [this, &p](const auto &range) {
108  PortProxy::writeBlobPhys(range.paddr, flags, p, range.size);
109  p = static_cast<const uint8_t *>(p) + range.size;
110  });
111 }
112 
113 bool
115 {
116  constexpr auto mode = BaseMMU::Write;
118  addr, size, _tc, mode, flags),
119  [this, v](const auto &range) {
120  PortProxy::memsetBlobPhys(range.paddr, flags, v, range.size);
121  });
122 }
123 
124 } // 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:114
gem5::BaseMMU::Read
@ Read
Definition: mmu.hh:56
system.hh
gem5::BaseMMU::Mode
Mode
Definition: mmu.hh:56
gem5::BaseMMU::Write
@ Write
Definition: mmu.hh:56
gem5::ThreadContext::getMMUPtr
virtual BaseMMU * getMMUPtr()=0
gem5::TranslatingPortProxy::fixupRange
virtual bool fixupRange(const TranslationGen::Range &range, BaseMMU::Mode mode) const
Definition: translating_port_proxy.hh:67
translating_port_proxy.hh
gem5::TranslationGen::Range
This structure represents a single, contiguous translation, or carries information about whatever fau...
Definition: translation_gen.hh:68
gem5::BaseMMU::translateFunctional
virtual Fault translateFunctional(const RequestPtr &req, ThreadContext *tc, Mode mode)
Definition: mmu.cc:118
gem5::Flags< FlagsType >
gem5::ThreadContext
ThreadContext is the external interface to all thread state for anything outside of the CPU.
Definition: thread_context.hh:94
gem5::VegaISA::p
Bitfield< 54 > p
Definition: pagetable.hh:70
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:101
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
flags
uint8_t flags
Definition: helpers.cc:66
gem5::Addr
uint64_t Addr
Address type This will probably be moved somewhere else in the near future.
Definition: types.hh:147
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:89
gem5::VegaISA::v
Bitfield< 0 > v
Definition: pagetable.hh:65
gem5::TranslatingPortProxy::tryOnBlob
bool tryOnBlob(BaseMMU::Mode mode, TranslationGenPtr gen, std::function< void(const TranslationGen::Range &)> func) const
Definition: translating_port_proxy.cc:63
base.hh
gem5::TranslatingPortProxy::flags
Request::Flags flags
Definition: translating_port_proxy.hh:64
chunk_generator.hh
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:63
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: gpu_translation_state.hh:37
thread_context.hh
gem5::TranslationGenPtr
std::unique_ptr< TranslationGen > TranslationGenPtr
Definition: translation_gen.hh:128
gem5::ArmISA::mode
Bitfield< 4, 0 > mode
Definition: misc_types.hh:74
gem5::X86ISA::addr
Bitfield< 3 > addr
Definition: types.hh:84

Generated on Sat Jun 18 2022 08:12:30 for gem5 by doxygen 1.8.17