1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/* -------------------------------------------
Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved.
------------------------------------------- */
#include <KernelKit/DebugOutput.h>
#include <NewKit/PageMgr.h>
#ifdef __NE_AMD64__
#include <HALKit/AMD64/Paging.h>
#elif defined(__NE_ARM64__)
#include <HALKit/ARM64/Paging.h>
#endif // ifdef __NE_AMD64__ || defined(__NE_ARM64__)
namespace NeOS
{
PTEWrapper::PTEWrapper(Boolean Rw, Boolean User, Boolean ExecDisable, UIntPtr VirtAddr)
: fRw(Rw),
fUser(User),
fExecDisable(ExecDisable),
fVirtAddr(VirtAddr),
fCache(false),
fShareable(false),
fWt(false),
fPresent(true),
fAccessed(false)
{
}
PTEWrapper::~PTEWrapper() = default;
/// @brief Flush virtual address.
/// @param VirtAddr
Void PageMgr::FlushTLB()
{
#ifndef __NE_MINIMAL_OS__
hal_flush_tlb();
#endif // !__NE_MINIMAL_OS__
}
/// @brief Reclaim freed page.
/// @return
Bool PTEWrapper::Reclaim()
{
if (!this->fPresent)
{
this->fPresent = true;
return true;
}
return false;
}
/// @brief Request a PTE.
/// @param Rw r/w?
/// @param User user mode?
/// @param ExecDisable disable execution on page?
/// @return
PTEWrapper PageMgr::Request(Boolean Rw, Boolean User, Boolean ExecDisable, SizeT Sz, SizeT Pad)
{
// Store PTE wrapper right after PTE.
VoidPtr ptr = NeOS::HAL::mm_alloc_bitmap(Rw, User, Sz, NO, Pad);
return PTEWrapper{Rw, User, ExecDisable, reinterpret_cast<UIntPtr>(ptr)};
}
/// @brief Disable BitMap.
/// @param wrapper the wrapper.
/// @return If the page bitmap was cleared or not.
Bool PageMgr::Free(Ref<PTEWrapper>& wrapper)
{
if (!NeOS::HAL::mm_free_bitmap((VoidPtr)wrapper.Leak().VirtualAddress()))
return false;
return true;
}
/// @brief Virtual PTE address.
/// @return The virtual address of the page.
const UIntPtr PTEWrapper::VirtualAddress()
{
return (fVirtAddr);
}
Bool PTEWrapper::Shareable()
{
return fShareable;
}
Bool PTEWrapper::Present()
{
return fPresent;
}
Bool PTEWrapper::Access()
{
return fAccessed;
}
Void PTEWrapper::NoExecute(const bool enable)
{
fExecDisable = enable;
}
Bool PTEWrapper::NoExecute()
{
return fExecDisable;
}
} // namespace NeOS
|
