:github_url: https://github.com/nyx-org/gaia


.. _program_listing_file_platform_amd64_mmu.hpp:

Program Listing for File mmu.hpp
================================

|exhale_lsh| :ref:`Return to documentation for file <file_platform_amd64_mmu.hpp>` (``platform/amd64/mmu.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   /* SPDX-License-Identifier: BSD-2-Clause */
   #pragma once
   #include <stddef.h>
   
   #define PML_ENTRY(addr, offset)                                                \
     (size_t)(addr & ((uintptr_t)0x1ff << offset)) >> offset;
   
   #define PTE_PRESENT (1ull << 0ull)
   #define PTE_WRITABLE (1ull << 1ull)
   #define PTE_USER (1ull << 2ull)
   #define PTE_NOT_EXECUTABLE (1ull << 63ull)
   #define PTE_HUGE (1ull << 7ull)
   
   #define PTE_ADDR_MASK 0x000ffffffffff000
   #define PTE_GET_ADDR(VALUE) ((VALUE)&PTE_ADDR_MASK)
   #define PTE_GET_FLAGS(VALUE) ((VALUE) & ~PTE_ADDR_MASK)
   
   #define PTE_IS_PRESENT(x) (((x)&PTE_PRESENT) != 0)
   #define PTE_IS_WRITABLE(x) (((x)&PTE_WRITABLE) != 0)
   #define PTE_IS_HUGE(x) (((x)&PTE_HUGE) != 0)
   #define PTE_IS_USER(x) (((x)&PTE_USER) != 0)
   #define PTE_IS_NOT_EXECUTABLE(x) (((x)&PTE_NOT_EXECUTABLE) != 0)
   
   namespace Gaia::Hal {
   constexpr size_t PAGE_SIZE = 4096;
   }