1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859 |
- // SPDX-License-Identifier: BSD-2-Clause-Patent
- // Copyright 2022 Google LLC
- // Author: Ard Biesheuvel <ardb@google.com>
- .set TT_TYPE_BLOCK, 0x1
- .set TT_TYPE_PAGE, 0x3
- .set TT_TYPE_TABLE, 0x3
- .set TT_AF, 0x1 << 10
- .set TT_NG, 0x1 << 11
- .set TT_RO, 0x2 << 6
- .set TT_XN, 0x3 << 53
- .set TT_MT_DEV, 0x0 << 2 // MAIR #0
- .set TT_MT_MEM, (0x3 << 2) | (0x3 << 8) // MAIR #3
- .set PAGE_XIP, TT_TYPE_PAGE | TT_MT_MEM | TT_AF | TT_RO | TT_NG
- .set BLOCK_XIP, TT_TYPE_BLOCK | TT_MT_MEM | TT_AF | TT_RO | TT_NG
- .set BLOCK_DEV, TT_TYPE_BLOCK | TT_MT_DEV | TT_AF | TT_XN | TT_NG
- .set BLOCK_MEM, TT_TYPE_BLOCK | TT_MT_MEM | TT_AF | TT_XN | TT_NG
- .globl idmap
- .section ".rodata.idmap", "a", %progbits
- .align 12
- idmap: /* level 0 */
- .quad 1f + TT_TYPE_TABLE
- .fill 511, 8, 0x0
- 1: /* level 1 */
- .quad 20f + TT_TYPE_TABLE // 1 GB of flash and device mappings
- .quad 21f + TT_TYPE_TABLE // up to 1 GB of DRAM
- .fill 510, 8, 0x0 // 510 GB of remaining VA space
- 20: /* level 2 */
- .quad 3f + TT_TYPE_TABLE // up to 2 MB of flash
- .quad BLOCK_XIP | (0x1 << 21) // another 2 MB of flash
- .fill 62, 8, 0x0 // 124 MB of unused flash
- .set idx, 64
- .rept 448
- .quad BLOCK_DEV | (idx << 21) // 896 MB of RW- device mappings
- .set idx, idx + 1
- .endr
- 21: /* level 2 */
- .set idx, 0x40000000 >> 21
- .rept 64
- .quad BLOCK_MEM | (idx << 21) // 128 MB of RW- memory mappings
- .set idx, idx + 1
- .endr
- .fill 448, 8, 0x0
- 3: /* level 3 */
- .quad 0x0 // omit first 4k page
- .set idx, 1
- .rept 511
- .quad PAGE_XIP | (idx << 12) // 2044 KiB of R-X flash mappings
- .set idx, idx + 1
- .endr
|