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/* -------------------------------------------
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 Kernel
{
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 = Kernel::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 (!Kernel::HAL::mm_free_bitmap((VoidPtr)wrapper.Leak().VirtualAddress()))
return false;
return true;
}
/// @brief Virtual PTE address.
/// @return The virtual address of the page.
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 Kernel
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