| 0,0 → 1,98 |
|---|
| /* |
| * Copyright (C) 2001-2004 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <arch/pm.h> |
| #include <arch/mm/page.h> |
| #include <arch/types.h> |
| |
| |
| /* |
| * There is no segmentation in long mode so we set up flat mode. In this |
| * mode, we use, for each privilege level, two segments spanning the |
| * whole memory. One is for code and one is for data. |
| */ |
| |
| struct descriptor gdt[GDT_ITEMS] = { |
| /* NULL descriptor */ |
| { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, |
| /* KTEXT descriptor */ |
| { .limit_0_15 = 0xffff, |
| .base_0_15 = 0, |
| .base_16_23 = 0, |
| .access = AR_PRESENT | AR_CODE | DPL_KERNEL, |
| .limit_16_19 = 0xf, |
| .available = 0, |
| .longmode = 1, |
| .special = 0, |
| .granularity = 1, |
| .base_24_31 = 0 }, |
| /* KDATA descriptor */ |
| { .limit_0_15 = 0xffff, |
| .base_0_15 = 0, |
| .base_16_23 = 0, |
| .access = AR_PRESENT | AR_DATA | AR_WRITABLE | DPL_KERNEL, |
| .limit_16_19 = 0xf, |
| .available = 0, |
| .longmode = 0, |
| .special = 0, |
| .granularity = 0, |
| .base_24_31 = 0 }, |
| /* UTEXT descriptor */ |
| { .limit_0_15 = 0xffff, |
| .base_0_15 = 0, |
| .base_16_23 = 0, |
| .access = AR_PRESENT | AR_CODE | DPL_USER, |
| .limit_16_19 = 0xf, |
| .available = 0, |
| .longmode = 1, |
| .special = 0, |
| .granularity = 0, |
| .base_24_31 = 0 }, |
| /* UDATA descriptor */ |
| { .limit_0_15 = 0xffff, |
| .base_0_15 = 0, |
| .base_16_23 = 0, |
| .access = AR_PRESENT | AR_DATA | AR_WRITABLE | DPL_USER, |
| .limit_16_19 = 0xf, |
| .available = 0, |
| .longmode = 0, |
| .special = 1, |
| .granularity = 1, |
| .base_24_31 = 0 }, |
| /* TSS descriptor - set up will be completed later */ |
| { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } |
| }; |
| |
| struct idescriptor idt[IDT_ITEMS]; |
| |
| static struct tss tss; |
| |
| /* gdtr is changed by kmp before next CPU is initialized */ |
| struct ptr_16_32 gdtr __attribute__ ((section ("K_DATA_START"))) = { .limit = sizeof(gdt) }; |
| //struct ptr_16_32 gdtr __attribute__ ((section ("K_DATA_START"))) = { .limit = sizeof(gdt), .base = KA2PA((__address) gdt) }; |
| struct ptr_16_32 idtr __attribute__ ((section ("K_DATA_START"))) = { .limit = sizeof(idt) }; |