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


.. _program_listing_file_platform_hal_mmu.hpp:

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

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

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

.. code-block:: cpp

   /* SPDX-License-Identifier: BSD-2-Clause */
   #pragma once
   #include "frg/spinlock.hpp"
   #include <lib/base.hpp>
   #include <lib/error.hpp>
   #include <lib/result.hpp>
   #include <stdint.h>
   
   namespace Gaia::Hal {
   namespace Vm {
   enum Prot {
     READ = (1 << 0),
     WRITE = (1 << 1),
     EXECUTE = (1 << 2),
     ALL = READ | WRITE | EXECUTE,
   };
   
   enum Flags {
     NONE = (1 << 0),
     HUGE = (1 << 1),
     LARGE = (1 << 2),
     USER = (1 << 3),
   };
   
   class Pagemap {
   public:
     void map(uintptr_t virt, uintptr_t phys, Prot prot, Flags flags);
     void remap(uintptr_t virt, Prot prot, Flags flags);
     void unmap(uintptr_t virt);
     void activate();
     void copy(Pagemap *dest);
   
     struct Mapping {
       Prot prot;
       uintptr_t address;
     };
   
     Result<Mapping, Error> get_mapping(uintptr_t virt);
   
     void init(bool kernel);
   
     Pagemap() : context(nullptr){};
   
     Pagemap(void *context) : context(context){};
   
     void destroy();
   
   private:
   #if defined(__amd64__) || defined(__riscv)
     void *context = nullptr;
   #endif
   
   #ifdef __aarch64__
     void *context[2];
   #endif
   
     frg::simple_spinlock lock;
   };
   
   void init();
   Pagemap get_current_map();
   
   } // namespace Vm
   } // namespace Gaia::Hal