| .. SPDX-License-Identifier: GPL-2.0+ |
| .. Copyright (C) 2023 Linus Walleij <linus.walleij@linaro.org> |
| |
| Broadcom Northstar Boards |
| ========================= |
| |
| This document describes how to use U-Boot on the Broadcom Northstar |
| boards, comprised of the Cortex A9 ARM-based BCM470x and BCM5301x SoCs. These |
| were introduced in 2012-2013 and some of them are also called StrataGX. |
| |
| Northstar is part of the iProc SoC family. |
| |
| A good overview of these boards can be found in Jon Mason's presentation |
| "Enabling New Hardware in U-Boot" where the difference between Northstar |
| and Northstar Plus and Northstar 2 (Aarch64) is addressed. |
| |
| The ROM in the Northstar SoC will typically look into NOR flash memory |
| for a boot loader, and the way this works is undocumented. It should be |
| possible to execute U-Boot as the first binary from the NOR flash but |
| this usage path is unexplored. Please add information if you know more. |
| |
| D-Link Boards |
| ------------- |
| |
| When we use U-Boot with D-Link routers, the NOR flash has a boot loader |
| and web server that can re-flash the bigger NAND flash memory for object |
| code in the SEAMA format, so on these platforms U-Boot is converted into |
| a SEAMA binary and installed in the SoC using the flash tool resident in |
| the NOR flash. Details can be found in the OpenWrt project codebase. |
| |
| Configure |
| --------- |
| |
| .. code-block:: console |
| |
| $ make CROSS_COMPILE=${CROSS_COMPILE} bcmns_defconfig |
| |
| Build |
| ----- |
| |
| .. code-block:: console |
| |
| $ make CROSS_COMPILE=${CROSS_COMPILE} |
| $ ${CROSS_COMPILE}strip u-boot |