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Diffstat (limited to 'dev/Kernel/src/BitMapMgr.cc')
| -rw-r--r-- | dev/Kernel/src/BitMapMgr.cc | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/dev/Kernel/src/BitMapMgr.cc b/dev/Kernel/src/BitMapMgr.cc deleted file mode 100644 index 18b1a156..00000000 --- a/dev/Kernel/src/BitMapMgr.cc +++ /dev/null @@ -1,195 +0,0 @@ -/* ------------------------------------------- - - Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved. - -------------------------------------------- */ - -#include <ArchKit/ArchKit.h> - -#ifdef __NE_AMD64__ -#include <HALKit/AMD64/Paging.h> -#elif defined(__NE_ARM64__) -#include <HALKit/ARM64/Paging.h> -#endif - -#include <NewKit/Defines.h> -#include <NewKit/KernelPanic.h> - -#define kBitMapMagic (0x10210U) -#define kBitMapPadSize (mib_cast(16)) - -#define kBitMapMagIdx (0U) -#define kBitMapSizeIdx (1U) -#define kBitMapUsedIdx (2U) - -namespace NeOS -{ - namespace HAL - { - namespace Detail - { - /// \brief Proxy Interface to allocate a bitmap. - class IBitMapProxy final - { - public: - explicit IBitMapProxy() = default; - ~IBitMapProxy() = default; - - NE_COPY_DELETE(IBitMapProxy); - - auto IsBitMap(VoidPtr page_ptr) -> Bool - { - if (!page_ptr) - return No; - - UIntPtr* ptr_bit_set = reinterpret_cast<UIntPtr*>(page_ptr); - - if (!ptr_bit_set[kBitMapMagIdx] || - ptr_bit_set[kBitMapMagIdx] != kBitMapMagic) - return No; - - return Yes; - } - - auto FreeBitMap(VoidPtr page_ptr) -> Bool - { - if (this->IsBitMap(page_ptr) == No) - return No; - - UIntPtr* ptr_bit_set = reinterpret_cast<UIntPtr*>(page_ptr); - - ptr_bit_set[kBitMapMagIdx] = kBitMapMagic; - ptr_bit_set[kBitMapUsedIdx] = No; - - this->GetBitMapStatus(ptr_bit_set); - - return Yes; - } - - UInt32 MakeMMFlags(Bool wr, Bool user) - { - UInt32 flags = kMMFlagsPresent; - - if (wr) - flags |= kMMFlagsWr; - - if (user) - flags |= kMMFlagsUser; - - return flags; - } - - /// @brief Iterate over availables pages for a free one. - /// @return The new address which was found. - auto FindBitMap(VoidPtr base_ptr, SizeT size, Bool wr, Bool user) -> VoidPtr - { - if (!size) - return nullptr; - - VoidPtr base = reinterpret_cast<VoidPtr>(((UIntPtr)base_ptr) + kPageSize); - - static SizeT biggest_block = 0UL; - - while (YES) - { - UIntPtr* ptr_bit_set = reinterpret_cast<UIntPtr*>(base); - - if (ptr_bit_set[kBitMapMagIdx] == kBitMapMagic && - ptr_bit_set[kBitMapSizeIdx] == size) - { - if (ptr_bit_set[kBitMapUsedIdx] == No) - { - ptr_bit_set[kBitMapSizeIdx] = size; - ptr_bit_set[kBitMapUsedIdx] = Yes; - - this->GetBitMapStatus(ptr_bit_set); - - UInt32 flags = this->MakeMMFlags(wr, user); - mm_map_page(ptr_bit_set, ptr_bit_set, flags); - - if (biggest_block < size) - biggest_block = size; - - return (VoidPtr)ptr_bit_set; - } - } - else if (ptr_bit_set[kBitMapMagIdx] != kBitMapMagic) - { - ptr_bit_set[kBitMapMagIdx] = kBitMapMagic; - ptr_bit_set[kBitMapSizeIdx] = size; - ptr_bit_set[kBitMapUsedIdx] = Yes; - - this->GetBitMapStatus(ptr_bit_set); - - UInt32 flags = this->MakeMMFlags(wr, user); - mm_map_page(ptr_bit_set, ptr_bit_set, flags); - - if (biggest_block < size) - biggest_block = size; - - return (VoidPtr)ptr_bit_set; - } - - base = reinterpret_cast<VoidPtr>(reinterpret_cast<UIntPtr>(base) + ((ptr_bit_set[kBitMapMagIdx] != kBitMapMagic) ? (size) : ptr_bit_set[kBitMapSizeIdx])); - } - - return nullptr; - } - - /// @brief Print Bitmap status - auto GetBitMapStatus(UIntPtr* ptr_bit_set) -> Void - { - if (!this->IsBitMap(ptr_bit_set)) - { - kout << "Not a BitMap: " << hex_number((UIntPtr)ptr_bit_set) << kendl; - return; - } - - kout << "Magic Number: " << hex_number(ptr_bit_set[kBitMapMagIdx]) << kendl; - kout << "Is Allocated: " << (ptr_bit_set[kBitMapUsedIdx] ? "Yes" : "No") << kendl; - kout << "Size of BitMap (B): " << number(ptr_bit_set[kBitMapSizeIdx]) << kendl; - kout << "Size of BitMap (KIB): " << number(KIB(ptr_bit_set[kBitMapSizeIdx])) << kendl; - kout << "Size of BitMap (MIB): " << number(MIB(ptr_bit_set[kBitMapSizeIdx])) << kendl; - kout << "Size of BitMap (GIB): " << number(GIB(ptr_bit_set[kBitMapSizeIdx])) << kendl; - kout << "Size of BitMap (TIB): " << number(TIB(ptr_bit_set[kBitMapSizeIdx])) << kendl; - kout << "Address Of BitMap Header: " << hex_number((UIntPtr)ptr_bit_set) << kendl; - } - }; - } // namespace Detail - - auto mm_is_bitmap(VoidPtr ptr) -> Bool - { - Detail::IBitMapProxy bitmp; - return bitmp.IsBitMap(ptr); - } - - /// @brief Allocate a new page to be used by the OS. - /// @param wr read/write bit. - /// @param user user bit. - /// @return a new bitmap allocated pointer. - auto mm_alloc_bitmap(Boolean wr, Boolean user, SizeT size, Bool is_page) -> VoidPtr - { - VoidPtr ptr_new = nullptr; - Detail::IBitMapProxy bitmp; - - ptr_new = bitmp.FindBitMap(kKernelBitMpStart, size, wr, user); - - MUST_PASS(ptr_new); - - return (UIntPtr*)ptr_new; - } - - /// @brief Free Bitmap, and mark it as absent. - /// @param ptr the pointer to free. - auto mm_free_bitmap(VoidPtr ptr) -> Bool - { - if (!ptr) - return No; - - Detail::IBitMapProxy bitmp; - Bool ret = bitmp.FreeBitMap(ptr); - - return ret; - } - } // namespace HAL -} // namespace NeOS |