| /* |
| * Copyright (c) 2009 Corey Tabaka |
| * Copyright (c) 2015-2018 Intel Corporation |
| * Copyright (c) 2016 Travis Geiselbrecht |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files |
| * (the "Software"), to deal in the Software without restriction, |
| * including without limitation the rights to use, copy, modify, merge, |
| * publish, distribute, sublicense, and/or sell copies of the Software, |
| * and to permit persons to whom the Software is furnished to do so, |
| * subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| #include <asm.h> |
| #include <arch/x86/descriptor.h> |
| |
| #define PHYS(x) ((x) - KERNEL_BASE + MEMBASE) |
| |
| .data |
| |
| .align 4096 |
| /* Keep it page alignment since we need to map this page */ |
| DATA(_gdtr_phys) |
| .short _gdt_end - _gdt - 1 |
| #if ARCH_X86_32 |
| .int PHYS(_gdt) |
| #elif ARCH_X86_64 |
| .quad PHYS(_gdt) |
| #endif |
| |
| .align 8 |
| DATA(_gdtr) |
| .short _gdt_end - _gdt - 1 |
| #if ARCH_X86_32 |
| .int _gdt |
| #elif ARCH_X86_64 |
| .quad _gdt |
| #endif |
| |
| .align 8 |
| DATA(_gdt) |
| .int 0 |
| .int 0 |
| |
| .set codesel_32, . - _gdt |
| _code_32_gde: |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b10011010 /* P(1) DPL(00) S(1) 1 C(0) R(1) A(0) */ |
| .byte 0b11001111 /* G(1) D(1) 0 0 limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| .set datasel, . - _gdt |
| _data_gde: |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b10010010 /* P(1) DPL(00) S(1) 0 E(0) W(1) A(0) */ |
| .byte 0b11001111 /* G(1) B(1) 0 0 limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| .set user_codesel_32, . - _gdt |
| _user_code_32_gde: |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b11111010 /* P(1) DPL(11) S(1) 1 C(0) R(1) A(0) */ |
| .byte 0b11001111 /* G(1) D(1) 0 0 limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| |
| .set user_datasel, . - _gdt |
| _user_data_32_gde: |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b11110010 /* P(1) DPL(11) S(1) 0 E(0) W(1) A(0) */ |
| .byte 0b11001111 /* G(1) B(1) 0 0 limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| .set codesel_64, . - _gdt |
| _code_64_gde: |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b10011010 /* P(1) DPL(00) S(1) 1 C(0) R(1) A(0) */ |
| .byte 0b10101111 /* G(1) D(0) L(1) AVL(0) limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| .set datasel_64, . - _gdt |
| _data_64_gde: |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b10010010 /* P(1) DPL(00) S(1) 1 E(0) W(1) A(0) */ |
| .byte 0b11001111 /* G(1) B(1) 0 AVL(0) limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| .set user_codesel_compat, . - _gdt |
| _user_code_compat_gde: |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b11111010 /* P(1) DPL(11) S(1) 1 C(0) R(1) A(0) */ |
| .byte 0b11001111 /* G(1) D(1) L(0) AVL(0) limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| .set user_datasel_compat, . - _gdt |
| _user_data_compat_gde: |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b11110010 /* P(1) DPL(11) S(1) 0 E(0) W(1) A(0) */ |
| .byte 0b11001111 /* G(1) B(1) 0 0 limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| .set user_codesel_64, . - _gdt |
| _user_code_64_gde: |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b11111010 /* P(1) DPL(11) S(1) 1 C(0) R(1) A(0) */ |
| .byte 0b10101111 /* G(1) D(0) L(1) AVL(0) limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| .set user_datasel_64, . - _gdt |
| _user_data_64_gde: |
| .short 0xffff /* limit 15:00 */ |
| .short 0x0000 /* base 15:00 */ |
| .byte 0x00 /* base 23:16 */ |
| .byte 0b11110010 /* P(1) DPL(11) S(1) 0 E(0) W(1) A(0) */ |
| .byte 0b11001111 /* G(1) B(1) 0 0 limit 19:16 */ |
| .byte 0x0 /* base 31:24 */ |
| |
| /* TSS descriptor */ |
| .set tsssel, . - _gdt |
| _tss_gde: |
| .short 0 /* limit 15:00 */ |
| .short 0 /* base 15:00 */ |
| .byte 0 /* base 23:16 */ |
| .byte 0x89 /* P(1) DPL(0) S(0) TYPE(9) */ |
| .byte 0x80 /* G(1) 0 0 AVL(0) limit 19:16 */ |
| .byte 0 /* base 31:24 */ |
| .quad 0x0000000000000000 |
| |
| DATA(_gdt_end) |
| |
