From a8968330aff45e0b8cf278f49fa337d5fcb9bfd8 Mon Sep 17 00:00:00 2001 From: Alex AUVOLAT Date: Fri, 28 Mar 2014 17:09:15 +0100 Subject: Import and compile code for article 6.5 --- sos-code-article6.5/hwcore/gdt.h | 42 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 sos-code-article6.5/hwcore/gdt.h (limited to 'sos-code-article6.5/hwcore/gdt.h') diff --git a/sos-code-article6.5/hwcore/gdt.h b/sos-code-article6.5/hwcore/gdt.h new file mode 100644 index 0000000..323b784 --- /dev/null +++ b/sos-code-article6.5/hwcore/gdt.h @@ -0,0 +1,42 @@ +/* Copyright (C) 2004 David Decotigny + + 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. +*/ +#ifndef _SOS_GDT_H_ +#define _SOS_GDT_H_ + +/** + * @file gdt.h + * + * The routines that manage the GDT, the table that maps the virtual + * addresses (data/instructions, segment-relative), to "linear" + * addresses (ie paged-memory). In SOS/x86, we use a "flat" virtual + * space, ie the virtual and linear spaces are equivalent. + * + * @see Intel x86 doc vol 3, chapter 3 + */ + +#include +#include + +/** + * Configure the virtual space as a direct mapping to the linear + * address space (ie "flat" virtual space). + */ +sos_ret_t sos_gdt_subsystem_setup(void); + + +#endif /* _SOS_GDT_H_ */ -- cgit v1.2.3