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001 /* Copyright (C) 2004 David Decotigny 001 /* Copyright (C) 2004 David Decotigny 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_GDT_H_ 018 #ifndef _SOS_GDT_H_ 020 #define _SOS_GDT_H_ 019 #define _SOS_GDT_H_ 021 020 022 /** 021 /** 023 * @file gdt.h 022 * @file gdt.h 024 * 023 * 025 * The routines that manage the GDT, the table 024 * The routines that manage the GDT, the table that maps the virtual 026 * addresses (data/instructions, segment-relat 025 * addresses (data/instructions, segment-relative), to "linear" 027 * addresses (ie paged-memory). In SOS/x86, we 026 * addresses (ie paged-memory). In SOS/x86, we use a "flat" virtual 028 * space, ie the virtual and linear spaces are 027 * space, ie the virtual and linear spaces are equivalent. 029 * 028 * 030 * @see Intel x86 doc vol 3, chapter 3 029 * @see Intel x86 doc vol 3, chapter 3 031 */ 030 */ 032 031 >> 032 #include <sos/types.h> 033 #include <sos/errno.h> 033 #include <sos/errno.h> 034 034 035 /** 035 /** 036 * Configure the virtual space as a direct map 036 * Configure the virtual space as a direct mapping to the linear 037 * address space (ie "flat" virtual space). 037 * address space (ie "flat" virtual space). 038 */ 038 */ 039 sos_ret_t sos_gdt_setup(void); !! 039 sos_ret_t sos_gdt_subsystem_setup(void); >> 040 >> 041 >> 042 /** >> 043 * Register the given address as the kernel TSS (for cpl3 -> cpl0 >> 044 * privilege changes). Assumes that this address corresponds to a >> 045 * valid TSS. >> 046 * >> 047 * @note Internal function called only by the cpu_context subsystem. >> 048 */ >> 049 sos_ret_t sos_gdt_register_kernel_tss(sos_vaddr_t tss_vaddr); >> 050 040 051 041 #endif /* _SOS_GDT_H_ */ 052 #endif /* _SOS_GDT_H_ */
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