mirror of
https://github.com/wichtounet/thor-os.git
synced 2025-08-04 01:36:10 -04:00
87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
//=======================================================================
|
|
// Copyright Baptiste Wicht 2013-2018.
|
|
// Distributed under the terms of the MIT License.
|
|
// (See accompanying file LICENSE or copy at
|
|
// http://www.opensource.org/licenses/MIT)
|
|
//=======================================================================
|
|
|
|
#ifndef PHYSICAL_ALLOCATOR_H
|
|
#define PHYSICAL_ALLOCATOR_H
|
|
|
|
#include <types.hpp>
|
|
|
|
namespace physical_allocator {
|
|
|
|
/*!
|
|
* \brief Early initialization of the physical allocator.
|
|
*
|
|
* This finalizes the e820 memory detection and start preparing memory from one of the blocks
|
|
*/
|
|
void early_init();
|
|
|
|
/*!
|
|
* \brief Early allocation of physical memory pages
|
|
* \param pages The number of pages to allocate
|
|
*/
|
|
size_t early_allocate(size_t pages);
|
|
|
|
/*
|
|
* \brief Initialize the real physical allocator.
|
|
*
|
|
* After this point, the early_allocate function should not be called
|
|
*/
|
|
void init();
|
|
|
|
/*!
|
|
* \brief Finalize the physical allocator, must be called after sysfs initialization
|
|
*/
|
|
void finalize();
|
|
|
|
/*!
|
|
* \brief Allocate several pages of physical memory
|
|
* \param pages The number of pages
|
|
* \return The physical addres of the allocated pages
|
|
*/
|
|
size_t allocate(size_t pages);
|
|
|
|
/*!
|
|
* \brief Free the allocated physical memory
|
|
* \param address The address of the allocated physical memory
|
|
* \param pages The number of pages
|
|
*/
|
|
void free(size_t address, size_t pages);
|
|
|
|
/*!
|
|
* \brief Return the amount of physical memory available
|
|
*/
|
|
size_t total_available();
|
|
|
|
/*!
|
|
* \brief Return the amount of physical memory currently available
|
|
*/
|
|
size_t available();
|
|
|
|
/*!
|
|
* \brief Return the amount of physical memory allocated
|
|
*/
|
|
size_t total_allocated();
|
|
|
|
/*!
|
|
* \brief Return the amount of physical memory currently allocated
|
|
*/
|
|
size_t allocated();
|
|
|
|
/*!
|
|
* \brief Return the amount of physical memory currently free
|
|
*/
|
|
size_t free();
|
|
|
|
/*!
|
|
* \brief Return the amount of physical memory free
|
|
*/
|
|
size_t total_free();
|
|
|
|
} //end of physical_allocator namespace
|
|
|
|
#endif
|