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Differences between /hwcore/segment.h (Article 3) and /hwcore/segment.h (Article 9.5)


001 /* Copyright (C) 2004  The SOS Team               001 /* Copyright (C) 2004  The SOS Team
002    Copyright (C) 1999  Free Software Foundatio << 
003                                                   002 
004    This program is free software; you can redi    003    This program is free software; you can redistribute it and/or
005    modify it under the terms of the GNU Genera    004    modify it under the terms of the GNU General Public License
006    as published by the Free Software Foundatio    005    as published by the Free Software Foundation; either version 2
007    of the License, or (at your option) any lat    006    of the License, or (at your option) any later version.
008                                                   007    
009    This program is distributed in the hope tha    008    This program is distributed in the hope that it will be useful,
010    but WITHOUT ANY WARRANTY; without even the     009    but WITHOUT ANY WARRANTY; without even the implied warranty of
011    MERCHANTABILITY or FITNESS FOR A PARTICULAR    010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
012    GNU General Public License for more details    011    GNU General Public License for more details.
013                                                   012    
014    You should have received a copy of the GNU     013    You should have received a copy of the GNU General Public License
015    along with this program; if not, write to t    014    along with this program; if not, write to the Free Software
016    Foundation, Inc., 59 Temple Place - Suite 3    015    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
017    USA.                                           016    USA. 
018 */                                                017 */
019 #ifndef _SOS_HWSEGS_H_                            018 #ifndef _SOS_HWSEGS_H_
020 #define _SOS_HWSEGS_H_                            019 #define _SOS_HWSEGS_H_
021                                                   020 
022 /**                                               021 /**
023  * @file segments.h                               022  * @file segments.h
024  *                                                023  *
025  * Global and local (GDT/LDT) segment descript    024  * Global and local (GDT/LDT) segment descriptor definition and
026  * structure. These segments map virtual addre    025  * structure. These segments map virtual addresses (ie
027  * data/instruction addresses, relative to the    026  * data/instruction addresses, relative to these segment descriptors)
028  * to linear addresses (ie addresses in the pa    027  * to linear addresses (ie addresses in the paged-memory space).
029  *                                                028  *
030  * @see Intel x86 doc, vol 3 chapter 3.           029  * @see Intel x86 doc, vol 3 chapter 3.
031  */                                               030  */
032                                                   031 
033 #include <sos/types.h>                         << 
034                                                   032 
035 /*                                                033 /*
036  * Global segment selectors (GDT) for SOS/x86.    034  * Global segment selectors (GDT) for SOS/x86.
037  *                                                035  *
038  * @see gdt.h                                     036  * @see gdt.h
039  */                                               037  */
040 #define SOS_SEG_NULL  0 /* NULL segment, unuse !! 038 #define SOS_SEG_NULL       0 /* NULL segment, unused by the procesor */
041 #define SOS_SEG_KCODE 1 /* Kernel code segment !! 039 #define SOS_SEG_KCODE      1 /* Kernel code segment */
042 #define SOS_SEG_KDATA 2 /* Kernel data segment !! 040 #define SOS_SEG_KDATA      2 /* Kernel data segment */
                                                   >> 041 #define SOS_SEG_UCODE      3 /* User code segment */
                                                   >> 042 #define SOS_SEG_UDATA      4 /* User data segment */
                                                   >> 043 #define SOS_SEG_KERNEL_TSS 5 /* Kernel TSS for CPL3 -> CPL0 privilege change */
043                                                   044 
044                                                   045 
                                                   >> 046 #ifndef ASM_SOURCE
045 /**                                               047 /**
046  * Helper macro that builds a segment register    048  * Helper macro that builds a segment register's value
047  */                                               049  */
048 #define SOS_BUILD_SEGMENT_REG_VALUE(desc_privi    050 #define SOS_BUILD_SEGMENT_REG_VALUE(desc_privilege,in_ldt,seg_index) \
049   (  (((desc_privilege) & 0x3)  << 0) \           051   (  (((desc_privilege) & 0x3)  << 0) \
050    | (((in_ldt)?1:0)            << 2) \           052    | (((in_ldt)?1:0)            << 2) \
051    | ((seg_index)               << 3) )           053    | ((seg_index)               << 3) )
                                                   >> 054 #else
                                                   >> 055 /*
                                                   >> 056  * Assembler-compliant version.
                                                   >> 057  *
                                                   >> 058  * Caution: In assembler code, "in_ldt" MUST be either 1 or 0, nothing
                                                   >> 059  * else.
                                                   >> 060  */
                                                   >> 061 #define SOS_BUILD_SEGMENT_REG_VALUE(desc_privilege,in_ldt,seg_index) \
                                                   >> 062   (  (((desc_privilege) & 0x3)  << 0) \
                                                   >> 063    | ((in_ldt & 1)              << 2) \
                                                   >> 064    | ((seg_index)               << 3) )
                                                   >> 065 #endif
052                                                   066 
053                                                   067 
054 /*                                                068 /*
055  * Local segment selectors (LDT) for SOS/x86      069  * Local segment selectors (LDT) for SOS/x86
056  */                                               070  */
057 /* None */                                        071 /* None */
058                                                   072 
059 #endif /* _SOS_HWSEGS_H_ */                       073 #endif /* _SOS_HWSEGS_H_ */
                                                      

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