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#ifndef TEACHOS_X86_64_PAGE_UTILITIES_HPP
#define TEACHOS_X86_64_PAGE_UTILITIES_HPP
#include <kapi/memory.hpp>
#include <cstddef>
namespace arch::memory
{
constexpr auto inline pml_index(std::size_t index, kapi::memory::page page) noexcept -> std::size_t
{
constexpr auto bits_per_level = 9;
auto shift_width = (index - 1) * bits_per_level;
constexpr auto index_mask = 0x1ffuz;
return page.number() >> shift_width & index_mask;
}
template<typename ValueType = void>
[[nodiscard]] constexpr auto to_higher_half_pointer(kapi::memory::physical_address address) -> ValueType *
{
using namespace kapi::memory;
auto const higher_half_address = higher_half_direct_map_base + address.raw();
return static_cast<ValueType *>(higher_half_address);
}
} // namespace arch::memory
#endif
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