| Ashish Kumar Mishra | ecbc243 | 2024-01-16 16:23:03 +0530 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | /* |
| 4 | * For reference see "AMD64 Architecture Programmer's Manual Volume 2", |
| 5 | * Document 24593-Rev. 3.31-July 2019 Chapter 5.3.4 |
| 6 | * |
| 7 | * Page table attributes: WB, User+Supervisor, Present, Writeable, Accessed, Dirty |
| 8 | */ |
| 9 | |
| 10 | .section .rodata |
| 11 | #define _PRES (1ULL << 0) |
| 12 | #define _RW (1ULL << 1) |
| 13 | #define _US (1ULL << 2) |
| 14 | #define _A (1ULL << 5) |
| 15 | #define _D (1ULL << 6) |
| 16 | #define _PS (1ULL << 7) |
| 17 | #define _GEN_DIR(a) (_PRES + _RW + _US + _A + (a)) |
| 18 | #define _GEN_PAGE(a) (_PRES + _RW + _US + _PS + _A + _D + (a)) |
| 19 | |
| 20 | .global PM4LE |
| 21 | .align 4096 |
| 22 | PM4LE: |
| 23 | .quad _GEN_DIR(PDE_table) |
| 24 | |
| 25 | .align 4096 |
| 26 | PDE_table: /* identity map 1GiB pages * 512 */ |
| 27 | .rept 512 |
| 28 | .quad _GEN_PAGE(0x40000000 * ((. - PDE_table) >> 3)) |
| 29 | .endr |