| /* |
| * 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 Definition of the Global Descriptor Table |
| */ |
| |
| #include <types.h> |
| #include <asm/modes.h> |
| #include <asm/segment.h> |
| |
| /** |
| * The 'Global Descriptor Table' used in barebox |
| * |
| * Note: This table must reachable by real and flat mode code |
| */ |
| uint64_t gdt[] __attribute__((aligned(16))) __bootdata = { |
| /* CS: code, read/execute, 4 GB, base 0 */ |
| [GDT_ENTRY_BOOT_CS] = GDT_ENTRY(0xc09b, 0, 0xfffff), |
| /* DS: data, read/write, 4 GB, base 0 */ |
| [GDT_ENTRY_BOOT_DS] = GDT_ENTRY(0xc093, 0, 0xfffff), |
| /* CS: for real mode calls */ |
| [GDT_ENTRY_REAL_CS] = GDT_ENTRY(0x009E, 0, 0x0ffff), |
| /* DS: for real mode calls */ |
| [GDT_ENTRY_REAL_DS] = GDT_ENTRY(0x0092, 0, 0x0ffff), |
| /* TSS: 32-bit tss, 104 bytes, base 4096 */ |
| /* We only have a TSS here to keep Intel VT happy; |
| we don't actually use it for anything. */ |
| [GDT_ENTRY_BOOT_TSS] = GDT_ENTRY(0x0089, 4096, 103), |
| }; |
| |
| /** |
| * Size of the GDT must be known to load it |
| * |
| * Note: This varibale must reachable by real and flat mode code |
| */ |
| unsigned gdt_size __bootdata = sizeof(gdt); |