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/*
* Copyright (C) 2009 Juergen Beisert, Pengutronix
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
/**
* @file
* @brief Declarations to bring some light in the real/protected/flat mode darkness
*/
#ifndef _ASM_X86_MODES_H
#define _ASM_X86_MODES_H
#ifndef __ASSEMBLY__
#include <types.h>
extern uint64_t gdt[];
extern unsigned gdt_size;
#endif
/** to simplify GDT entry generation */
#define GDT_ENTRY(flags, base, limit) \
((((base) & 0xff000000ULL) << (56-24)) | \
(((flags) & 0x0000f0ffULL) << 40) | \
(((limit) & 0x000f0000ULL) << (48-16)) | \
(((base) & 0x00ffffffULL) << 16) | \
(((limit) & 0x0000ffffULL)))
/** 32 bit barebox text */
#define GDT_ENTRY_BOOT_CS 2
#define __BOOT_CS (GDT_ENTRY_BOOT_CS * 8)
/** 32 bit barebox data */
#define GDT_ENTRY_BOOT_DS 3
#define __BOOT_DS (GDT_ENTRY_BOOT_DS * 8)
/** 16 bit barebox text */
#define GDT_ENTRY_REAL_CS 4
#define __REAL_CS (GDT_ENTRY_REAL_CS * 8)
/** 16 bit barebox data */
#define GDT_ENTRY_REAL_DS 5
#define __REAL_DS (GDT_ENTRY_REAL_DS * 8)
/** Something to make others happy */
#define GDT_ENTRY_BOOT_TSS 6
#define __BOOT_TSS (GDT_ENTRY_BOOT_TSS * 8)
#endif /* _ASM_X86_MODES_H */
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