cpu_io::virtual_memory Namespace Reference

Functions
auto	GetUserPagePermissions (bool readable=true, bool writable=false, bool executable=false, bool global=false) -> uint64_t
auto	GetKernelPagePermissions (bool readable=true, bool writable=false, bool executable=false, bool global=false) -> uint64_t
void	SetPageDirectory (uint64_t pd)
auto	GetPageDirectory () -> uint64_t
void	EnablePage ()
void	FlushTLBAll ()
auto	GetTableEntryPermissions () -> uint64_t
auto	GetVirtualPageNumber (uint64_t virtual_addr, size_t level) -> uint64_t
auto	PageAlign (uint64_t addr) -> uint64_t
auto	PageAlignUp (uint64_t addr) -> uint64_t
auto	IsPageAligned (uint64_t addr) -> bool
auto	IsPageTableEntryValid (uint64_t pte) -> bool
auto	PageTableEntryToPhysical (uint64_t pte) -> uint64_t
auto	PhysicalToPageTableEntry (uint64_t physical_addr, uint64_t flags) -> uint64_t

Variables
static constexpr size_t	kPageSize = 4096
static constexpr size_t	kPteAttributeBits = 12
static constexpr size_t	kPageOffsetBits = 12
static constexpr size_t	kVpnBits = 9
static constexpr size_t	kVpnMask = 0x1FF
static constexpr size_t	kPageTableLevels = 4
static constexpr uint64_t	kValid = 0x1
static constexpr uint64_t	kWrite = 0x2
static constexpr uint64_t	kUser = 0x4
static constexpr uint64_t	kRead = 0x200
static constexpr uint64_t	kExec = 0x400
static constexpr uint64_t	kGlobal = 0x100

Function Documentation

EnablePage()

void cpu_io::virtual_memory::EnablePage ( )

inline

Definition at line 134 of file cpu_io.h.

                         {
  auto* env = test_env::TestEnvironmentState::GetCurrentThreadEnvironment();
  assert(env && "TestEnvironmentState not set for current thread");
  auto& core = env->GetCurrentCoreEnv();
  core.paging_enabled = true;
}

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FlushTLBAll()

void cpu_io::virtual_memory::FlushTLBAll ( )

inline

Definition at line 141 of file cpu_io.h.

                          {
  // 在测试环境中不需要实际操作
}

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GetKernelPagePermissions()

auto cpu_io::virtual_memory::GetKernelPagePermissions ( bool  readable = true, bool  writable = false, bool  executable = false, bool  global = false  ) -> uint64_t

inline

Definition at line 99 of file cpu_io.h.

                                                                      {
  uint64_t flags = kValid;  // Kernel pages don't need kUser
  if (readable) {
    flags |= kRead;
  }
  if (writable) {
    flags |= kWrite;
  }
  if (executable) {
    flags |= kExec;
  }
  if (global) {
    flags |= kGlobal;
  }
  return flags;
}

GetPageDirectory()

auto cpu_io::virtual_memory::GetPageDirectory ( ) -> uint64_t

inline

Definition at line 127 of file cpu_io.h.

                                           {
  auto* env = test_env::TestEnvironmentState::GetCurrentThreadEnvironment();
  assert(env && "TestEnvironmentState not set for current thread");
  auto& core = env->GetCurrentCoreEnv();
  return core.page_directory;
}

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GetTableEntryPermissions()

auto cpu_io::virtual_memory::GetTableEntryPermissions ( ) -> uint64_t

inline

Definition at line 146 of file cpu_io.h.

                                                   {
  return kValid | kWrite | kUser | kRead | kExec;
}

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GetUserPagePermissions()

auto cpu_io::virtual_memory::GetUserPagePermissions ( bool  readable = true, bool  writable = false, bool  executable = false, bool  global = false  ) -> uint64_t

inline

Definition at line 79 of file cpu_io.h.

                {
  uint64_t flags = kValid | kUser;
  if (readable) {
    flags |= kRead;
  }
  if (writable) {
    flags |= kWrite;
  }
  if (executable) {
    flags |= kExec;
  }
  if (global) {
    flags |= kGlobal;
  }
  return flags;
}

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GetVirtualPageNumber()

auto cpu_io::virtual_memory::GetVirtualPageNumber ( uint64_t  virtual_addr, size_t  level  ) -> uint64_t

inline

Definition at line 151 of file cpu_io.h.

                {
  return (virtual_addr >> (kPageOffsetBits + level * kVpnBits)) & kVpnMask;
}

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IsPageAligned()

auto cpu_io::virtual_memory::IsPageAligned ( uint64_t  addr ) -> bool

inline

Definition at line 165 of file cpu_io.h.

                                                 {
  return (addr & (kPageSize - 1)) == 0;
}

IsPageTableEntryValid()

auto cpu_io::virtual_memory::IsPageTableEntryValid ( uint64_t  pte ) -> bool

inline

Definition at line 170 of file cpu_io.h.

                                                        {
  return (pte & kValid) != 0;
}

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PageAlign()

auto cpu_io::virtual_memory::PageAlign ( uint64_t  addr ) -> uint64_t

inline

Definition at line 157 of file cpu_io.h.

                                                 {
  return addr & ~(kPageSize - 1);
}

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PageAlignUp()

auto cpu_io::virtual_memory::PageAlignUp ( uint64_t  addr ) -> uint64_t

inline

Definition at line 161 of file cpu_io.h.

                                                   {
  return (addr + kPageSize - 1) & ~(kPageSize - 1);
}

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PageTableEntryToPhysical()

auto cpu_io::virtual_memory::PageTableEntryToPhysical ( uint64_t  pte ) -> uint64_t

inline

Definition at line 174 of file cpu_io.h.

                                                               {
  return pte & 0x000FFFFFFFFFF000ULL;
}

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PhysicalToPageTableEntry()

auto cpu_io::virtual_memory::PhysicalToPageTableEntry ( uint64_t  physical_addr, uint64_t  flags  ) -> uint64_t

inline

Definition at line 178 of file cpu_io.h.

                {
  return (physical_addr & 0x000FFFFFFFFFF000ULL) | (flags & 0xFFF) |
         (flags & (1ULL << 63));
}

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SetPageDirectory()

void cpu_io::virtual_memory::SetPageDirectory ( uint64_t  pd )

inline

Definition at line 120 of file cpu_io.h.

                                          {
  auto* env = test_env::TestEnvironmentState::GetCurrentThreadEnvironment();
  assert(env && "TestEnvironmentState not set for current thread");
  auto& core = env->GetCurrentCoreEnv();
  core.page_directory = pd;
}

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Variable Documentation

kExec

constexpr uint64_t cpu_io::virtual_memory::kExec = 0x400

staticconstexpr

Definition at line 75 of file cpu_io.h.

kGlobal

constexpr uint64_t cpu_io::virtual_memory::kGlobal = 0x100

staticconstexpr

Definition at line 76 of file cpu_io.h.

kPageOffsetBits

constexpr size_t cpu_io::virtual_memory::kPageOffsetBits = 12

staticconstexpr

Definition at line 65 of file cpu_io.h.

kPageSize

constexpr size_t cpu_io::virtual_memory::kPageSize = 4096

staticconstexpr

Definition at line 63 of file cpu_io.h.

kPageTableLevels

constexpr size_t cpu_io::virtual_memory::kPageTableLevels = 4

staticconstexpr

Definition at line 68 of file cpu_io.h.

kPteAttributeBits

constexpr size_t cpu_io::virtual_memory::kPteAttributeBits = 12

staticconstexpr

Definition at line 64 of file cpu_io.h.

kRead

constexpr uint64_t cpu_io::virtual_memory::kRead = 0x200

staticconstexpr

Definition at line 74 of file cpu_io.h.

kUser

constexpr uint64_t cpu_io::virtual_memory::kUser = 0x4

staticconstexpr

Definition at line 73 of file cpu_io.h.

kValid

constexpr uint64_t cpu_io::virtual_memory::kValid = 0x1

staticconstexpr

Definition at line 71 of file cpu_io.h.

kVpnBits

constexpr size_t cpu_io::virtual_memory::kVpnBits = 9

staticconstexpr

Definition at line 66 of file cpu_io.h.

kVpnMask

constexpr size_t cpu_io::virtual_memory::kVpnMask = 0x1FF

staticconstexpr

Definition at line 67 of file cpu_io.h.

kWrite

constexpr uint64_t cpu_io::virtual_memory::kWrite = 0x2

staticconstexpr

Definition at line 72 of file cpu_io.h.