gem5  v21.1.0.2
syscall_emul_buf.hh
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28 
29 #ifndef __SIM_SYSCALL_EMUL_BUF_HH__
30 #define __SIM_SYSCALL_EMUL_BUF_HH__
31 
37 
38 #include <cstring>
39 
40 #include "base/types.hh"
42 
43 namespace gem5
44 {
45 
58 {
59 
60  public:
61 
66  BaseBufferArg(Addr _addr, int _size)
67  : addr(_addr), size(_size), bufPtr(new uint8_t[size])
68  {
69  // clear out buffer: in case we only partially populate this,
70  // and then do a copyOut(), we want to make sure we don't
71  // introduce any random junk into the simulated address space
72  memset(bufPtr, 0, size);
73  }
74 
75  ~BaseBufferArg() { delete [] bufPtr; }
76 
80  bool
81  copyIn(const PortProxy &memproxy)
82  {
83  memproxy.readBlob(addr, bufPtr, size);
84  return true; // no EFAULT detection for now
85  }
86 
90  bool
91  copyOut(const PortProxy &memproxy)
92  {
93  memproxy.writeBlob(addr, bufPtr, size);
94  return true; // no EFAULT detection for now
95  }
96 
97  protected:
98  const Addr addr;
99  const int size;
100  uint8_t * const bufPtr;
101 };
102 
107 class BufferArg : public BaseBufferArg
108 {
109  public:
114  BufferArg(Addr _addr, int _size) : BaseBufferArg(_addr, _size) { }
115 
119  void *bufferPtr() { return bufPtr; }
120 };
121 
131 template <class T>
133 {
134  public:
141  TypedBufferArg(Addr _addr, int _size = sizeof(T))
142  : BaseBufferArg(_addr, _size)
143  { }
144 
149  operator T*() { return (T *)bufPtr; }
150 
155  T &operator*() { return *((T *)bufPtr); }
156 
157 
162  T* operator->() { return (T *)bufPtr; }
163 
168  T &operator[](int i) { return ((T *)bufPtr)[i]; }
169 };
170 
171 } // namespace gem5
172 
173 #endif // __SIM_SYSCALL_EMUL_BUF_HH__
gem5::PortProxy::writeBlob
void writeBlob(Addr addr, const void *p, int size) const
Same as tryWriteBlob, but insists on success.
Definition: port_proxy.hh:192
gem5::TypedBufferArg
TypedBufferArg is a class template; instances of this template represent typed buffers in target user...
Definition: syscall_emul_buf.hh:132
gem5::BaseBufferArg
Base class for BufferArg and TypedBufferArg, Not intended to be used directly.
Definition: syscall_emul_buf.hh:57
gem5::BaseBufferArg::BaseBufferArg
BaseBufferArg(Addr _addr, int _size)
Allocate a buffer of size 'size' representing the memory at target address 'addr'.
Definition: syscall_emul_buf.hh:66
gem5::ArmISA::i
Bitfield< 7 > i
Definition: misc_types.hh:66
gem5::TypedBufferArg::operator->
T * operator->()
Enable the use of '->' to reference fields where T is a struct type.
Definition: syscall_emul_buf.hh:162
gem5::BaseBufferArg::size
const int size
buffer size
Definition: syscall_emul_buf.hh:99
gem5::BufferArg
BufferArg represents an untyped buffer in target user space that is passed by reference to an (emulat...
Definition: syscall_emul_buf.hh:107
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::BaseBufferArg::addr
const Addr addr
address of buffer in target address space
Definition: syscall_emul_buf.hh:98
gem5::PortProxy::readBlob
void readBlob(Addr addr, void *p, int size) const
Higher level interfaces based on the above.
Definition: port_proxy.hh:182
gem5::Addr
uint64_t Addr
Address type This will probably be moved somewhere else in the near future.
Definition: types.hh:147
gem5::BufferArg::BufferArg
BufferArg(Addr _addr, int _size)
Allocate a buffer of size 'size' representing the memory at target address 'addr'.
Definition: syscall_emul_buf.hh:114
gem5::BaseBufferArg::copyIn
bool copyIn(const PortProxy &memproxy)
copy data into simulator space (read from target memory)
Definition: syscall_emul_buf.hh:81
gem5::TypedBufferArg::operator*
T & operator*()
Convert TypedBufferArg<T> to a reference to T that references the internal buffer value.
Definition: syscall_emul_buf.hh:155
gem5::TypedBufferArg::TypedBufferArg
TypedBufferArg(Addr _addr, int _size=sizeof(T))
Allocate a buffer of type T representing the memory at target address 'addr'.
Definition: syscall_emul_buf.hh:141
types.hh
gem5::BaseBufferArg::bufPtr
uint8_t *const bufPtr
pointer to buffer in simulator space
Definition: syscall_emul_buf.hh:100
gem5::BaseBufferArg::copyOut
bool copyOut(const PortProxy &memproxy)
copy data out of simulator space (write to target memory)
Definition: syscall_emul_buf.hh:91
se_translating_port_proxy.hh
gem5::BaseBufferArg::~BaseBufferArg
~BaseBufferArg()
Definition: syscall_emul_buf.hh:75
gem5::BufferArg::bufferPtr
void * bufferPtr()
Return a pointer to the internal simulator-space buffer.
Definition: syscall_emul_buf.hh:119
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
gem5::TypedBufferArg::operator[]
T & operator[](int i)
Enable the use of '[]' to reference fields where T is an array type.
Definition: syscall_emul_buf.hh:168

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