#include <stdint.h>

Include dependency graph for x86_64_gdt.h:

This graph shows which files directly or indirectly include this file:

Classes
struct	_gdt

struct	_gdtr

Macros
#define	GDT_ENTRY_NULL 0

#define	GDT_ENTRY_KERNEL_CODE 1

#define	GDT_ENTRY_KERNEL_DATA 2

#define	GDT_ENTRY_USER_CODE32 3

#define	GDT_ENTRY_USER_DATA 4

#define	GDT_ENTRY_USER_CODE 5

#define	GDT_ENTRY_KERNEL_CODE32 6

#define	GDT_ENTRY_TSS 7

#define	GDT_ENTRY_MAX 9

#define	SEGVAL(gdtent, rpl) ((gdtent << 3) \| rpl)

#define	SEGVAL_LDT(ldtent, rpl) ((ldtent << 3) \| 0x4 \| rpl)

#define	GDT_FLAG_GRAN 0x8

#define	GDT_FLAG_32BT 0x4

#define	GDT_FLAG_64BT 0x2

#define	GDT_ACCESS_PRESENT 0x80

#define	GDT_ACCESS_PRIVL(x) (x << 5)

#define	GDT_ACCESS_TYPE 0x10

#define	GDT_ACCESS_EX 0x8

#define	GDT_ACCESS_DC 0x4

#define	GDT_ACCESS_RW 0x2

#define	GDT_ACCESS_AC 0x1

Typedefs
typedef struct _gdt	gdt_entry

typedef struct _gdt *	pgdt_entry

typedef struct _gdtr	gdtr

typedef struct _gdtr *	pgdtr

Enumerations
enum	sregs { SREG_CS , SREG_DS , SREG_ES , SREG_FS , SREG_GS , SREG_SS }

Functions
void	x86_64_hal_init_gdt ()
	Initialize the Global Descriptor Table.

void	x86_64_hal_init_gdt_ap ()

void	set_gdt_entry (gdt_entry &entry, size_t base, size_t limit, uint8_t access, uint8_t flags)

Macro Definition Documentation

◆ GDT_ACCESS_AC

#define GDT_ACCESS_AC 0x1

◆ GDT_ACCESS_DC

#define GDT_ACCESS_DC 0x4

◆ GDT_ACCESS_EX

#define GDT_ACCESS_EX 0x8

◆ GDT_ACCESS_PRESENT

#define GDT_ACCESS_PRESENT 0x80

◆ GDT_ACCESS_PRIVL

#define GDT_ACCESS_PRIVL ( x ) (x << 5)

◆ GDT_ACCESS_RW

#define GDT_ACCESS_RW 0x2

◆ GDT_ACCESS_TYPE

#define GDT_ACCESS_TYPE 0x10

◆ GDT_ENTRY_KERNEL_CODE

#define GDT_ENTRY_KERNEL_CODE 1

◆ GDT_ENTRY_KERNEL_CODE32

#define GDT_ENTRY_KERNEL_CODE32 6

◆ GDT_ENTRY_KERNEL_DATA

#define GDT_ENTRY_KERNEL_DATA 2

◆ GDT_ENTRY_MAX

#define GDT_ENTRY_MAX 9

◆ GDT_ENTRY_NULL

#define GDT_ENTRY_NULL 0

BSD 2-Clause License

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

◆ GDT_ENTRY_TSS

#define GDT_ENTRY_TSS 7

◆ GDT_ENTRY_USER_CODE

#define GDT_ENTRY_USER_CODE 5

◆ GDT_ENTRY_USER_CODE32

#define GDT_ENTRY_USER_CODE32 3

◆ GDT_ENTRY_USER_DATA

#define GDT_ENTRY_USER_DATA 4

◆ GDT_FLAG_32BT

#define GDT_FLAG_32BT 0x4

◆ GDT_FLAG_64BT

#define GDT_FLAG_64BT 0x2

◆ GDT_FLAG_GRAN

#define GDT_FLAG_GRAN 0x8

◆ SEGVAL

#define SEGVAL	(	gdtent,
		rpl
	)	((gdtent << 3) \| rpl)

◆ SEGVAL_LDT

#define SEGVAL_LDT	(	ldtent,
		rpl
	)	((ldtent << 3) \| 0x4 \| rpl)

Typedef Documentation

◆ gdt_entry

typedef struct _gdt gdt_entry

◆ gdtr

typedef struct _gdtr gdtr

◆ pgdt_entry

typedef struct _gdt * pgdt_entry

◆ pgdtr

typedef struct _gdtr * pgdtr

Enumeration Type Documentation

◆ sregs

enum sregs

Enumerator
SREG_CS
SREG_DS
SREG_ES
SREG_FS
SREG_GS
SREG_SS

Function Documentation

◆ set_gdt_entry()

void set_gdt_entry	(	gdt_entry &	entry,
		size_t	base,
		size_t	limit,
		uint8_t	access,
		uint8_t	flags
	)

extern

==========================================================================================

G L O B A L D E S C R I P T O R T A B L E

◆ x86_64_hal_init_gdt()

void x86_64_hal_init_gdt ( )

Initialize the Global Descriptor Table.

◆ x86_64_hal_init_gdt_ap()

void x86_64_hal_init_gdt_ap ( )