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/*
* CMOS
* Copyright (C) 2024-2025 Raghuram Subramani <raghus2247@gmail.com>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <kernel/io.h>
#include <boot/gdt.h>
GDT_entry GDT[] = {
/* NULL Descriptor */
GDT_ENTRY(0, 0, 0, 0),
/* Kernel Mode Code Segment */
GDT_ENTRY(0, 0xfffff, KERNEL_CODE_SEGMENT_ACCESS_FLAGS, FLAGS),
/* Kernel Mode Data Segment */
GDT_ENTRY(0, 0xfffff, KERNEL_DATA_SEGMENT_ACCESS_FLAGS, FLAGS),
/* User Mode Code Segment */
// GDT_ENTRY(0, 0xfffff, USER_CODE_SEGMENT_ACCESS_FLAGS, FLAGS),
/* User Mode Data Segment */
// GDT_ENTRY(0, 0xfffff, USER_DATA_SEGMENT_ACCESS_FLAGS, FLAGS)
/* TODO: TSS? */
/* TODO: LDT? */
};
GDT_descriptor g_GDT_descriptor = { sizeof(GDT) - 1, &GDT[0] };
void
GDT_load(void)
{
_GDT_flush(&g_GDT_descriptor);
}
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