| Stefan Bosch | 48397f1 | 2020-07-10 19:07:25 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0+ |
| 2 | * |
| 3 | * NSIH (Nexell System Information Header) for FriendlyArm nanopi2 board |
| 4 | * |
| 5 | * The NSIH (first 512 Bytes of u-boot.bin) is necessary for the |
| 6 | * 2nd-Bootloader to get information like load address of U-Boot. |
| 7 | * |
| 8 | * 0x400 must be added to CONFIG_SYS_TEXT_BASE to have the actual load and |
| 9 | * start address because 2nd-Bootloader loads with an offset of 0x400 |
| 10 | * (NSIH + 0x200 bytes are not loaded into RAM). |
| 11 | * |
| 12 | * It has been tested / is working with the following 2nd-Bootloader: |
| 13 | * "BL1 by Nexell V1.0.0-gd551e13 [Built on 2018-01-25 16:58:29]" |
| 14 | * |
| 15 | * (C) Copyright 2020 Stefan Bosch <stefan_b@posteo.net> |
| 16 | */ |
| 17 | |
| 18 | #ifndef __BOOT0_H |
| 19 | #define __BOOT0_H |
| 20 | |
| 21 | ARM_VECTORS |
| 22 | .space 0x30 |
| 23 | .word (_end - _start) + 20 * 1024 /* 0x50: load size |
| 24 | * (bin + 20k for DTB) */ |
| 25 | .space 0x4 |
| 26 | .word CONFIG_SYS_TEXT_BASE + 0x400 /* 0x58: load address */ |
| 27 | .word 0x00000000 |
| 28 | .word CONFIG_SYS_TEXT_BASE + 0x400 /* 0x60: start address */ |
| 29 | .space 0x198 |
| 30 | .byte 'N' /* 0x1FC: "NSIH" signature */ |
| 31 | .byte 'S' |
| 32 | .byte 'I' |
| 33 | .byte 'H' |
| 34 | |
| 35 | /* The NSIH + 0x200 bytes are omitted by the 2nd-Bootloader */ |
| 36 | .space 0x200 |
| 37 | _start: |
| 38 | ARM_VECTORS |
| 39 | |
| 40 | #endif /* __BOOT0_H */ |