| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * Copyright 2019 NXP |
| */ |
| |
| #include <config.h> |
| |
| .align 8 |
| .global boot_pointer |
| boot_pointer: |
| .space 32 |
| |
| /* |
| * Routine: save_boot_params (called after reset from start.S) |
| */ |
| |
| .global save_boot_params |
| save_boot_params: |
| /* The firmware provided ATAG/FDT address can be found in r2/x0 */ |
| adr x0, boot_pointer |
| stp x1, x2, [x0], #16 |
| stp x3, x4, [x0], #16 |
| |
| /* |
| * We use absolute address not PC relative address for return. |
| * When running SPL on iMX8, the A core starts at address 0, |
| * an alias to OCRAM 0x100000, our linker address for SPL is |
| * from 0x100000. So using absolute address can jump to the OCRAM |
| * address from the alias. The alias only map first 96KB of OCRAM, |
| * so this require the SPL size can't beyond 96KB. |
| * But when using SPL DM, the size increase significantly and |
| * always beyonds 96KB. That's why we have to jump to OCRAM. |
| * Normal u-boot also runs into this codes, but there is no impact. |
| */ |
| ldr x1, =save_boot_params_ret |
| br x1 |