vm_mm.cpp File Reference

Kernel virtual memory manager implementation. More...

#include <sys.h>
#include <boot.h>
#include <efi.h>

Include dependency graph for vm_mm.cpp:

Classes
struct	KmemDebugOverhead
	Overhead for dynamically allocated memory chunks for storing debug information. More...
Functions
static void	MapHeap ()
	Map all pages starting from the last mapped heap address till the current heap pointer.
static void *	KmemAllocate (size_t size, size_t align=0)
	Kernel dynamic memory allocation.
static void	KmemFree (void *ptr)
	Kernel dynamic memory freeing.
void *	__operator_new (size_t size, const char *file, int line, bool isArray, size_t align)
	Back-end for operator new which should be implemented by each environment.
void *	__operator_new (size_t size, bool isArray, size_t align)
	Back-end for operator new which should be implemented by each environment.
void	__operator_delete (void *ptr, bool isArray)
	Back-end for operator delete which should be implemented by each environment.
Variables
static vaddr_t	tmpHeap
	Temporal location for heap pointer (during vm::MM::IS_INITIAL phase).
static vaddr_t	tmpQuickMap
	Temporal location for quick map pages address (during vm::MM::IS_INITIAL phase).
static void **	tmpQuickMapPte
	Temporal location for quick map PTEs (during vm::MM::IS_INITIAL phase).
static paddr_t	tmpDefaultLatRoot
	Temporal location for defaultLatEntryroot table (during vm::MM::IS_INITIAL phase).
static vaddr_t	tmpLastMappedHeap
	Temporal location for last mapped heap address.

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Detailed Description

Kernel virtual memory manager implementation.

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Function Documentation

void __operator_delete	(	void *	ptr,
		bool	isArray = false
	)

Back-end for operator delete which should be implemented by each environment.

Parameters:

ptr	Pointer to the memory block being freed.
isArray	true if delete[] operator was invoked, false otherwise.

void* __operator_new	(	size_t	size,
		bool	isArray = false,
		size_t	align = 0
	)

Back-end for operator new which should be implemented by each environment.

This version is invoked in release builds.

Parameters:

size	Allocation size.
isArray	true if new[] operator was invoked, false otherwise.
align	Alignment value. Zero indicates that no specific alignment required.

Returns:

Pointer to allocated memory block.

void* __operator_new	(	size_t	size,
		const char *	file,
		int	line,
		bool	isArray = false,
		size_t	align = 0
	)

Back-end for operator new which should be implemented by each environment.

This version is invoked in debug builds with source code location in arguments.

Parameters:

size	Allocation size.
file	Source file name where from the operator is invoked.
line	Line number in the source file where from the operator is invoked.
isArray	true if new[] operator was invoked, false otherwise.
align	Alignment value. Zero indicates that no specific alignment required.

Returns:

Pointer to allocated memory block.

static void* KmemAllocate	(	size_t	size,
		size_t	align = 0
	)		[inline, static]

Kernel dynamic memory allocation.

This function can be used only by new operators. All the rest code must use new operators for all dynamic memory allocations.

Parameters:

size	Size of memory chunk to allocate.
align	Alignment of memory chunk. Must be power of two. Zero for default alignment.

static void KmemFree

(

void *

ptr

)

[inline, static]

Kernel dynamic memory freeing.

This function can be used only by delete operators. All the rest code must use delete operators for all dynamic memory freeings.

Parameters:

ptr	Pointer to dynamically allocated memory chunk. Nothing is done if it is zero.

static void MapHeap

(

)

[static]

Map all pages starting from the last mapped heap address till the current heap pointer.

This function is used only during vm::MM::IS_INITIAL phase.

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Variable Documentation

paddr_t tmpDefaultLatRoot [static]

Temporal location for defaultLatEntryroot table (during vm::MM::IS_INITIAL phase).

vaddr_t tmpHeap [static]

Temporal location for heap pointer (during vm::MM::IS_INITIAL phase).

vaddr_t tmpLastMappedHeap [static]

Temporal location for last mapped heap address.

Heap is mapped up to this address. The value is valid during vm::MM::IS_INITIAL phase.

vaddr_t tmpQuickMap [static]

Temporal location for quick map pages address (during vm::MM::IS_INITIAL phase).

void** tmpQuickMapPte [static]

Temporal location for quick map PTEs (during vm::MM::IS_INITIAL phase).