diff options
Diffstat (limited to 'doc/board/broadcom')
| -rw-r--r-- | doc/board/broadcom/index.rst | 1 | ||||
| -rw-r--r-- | doc/board/broadcom/northstar.rst | 44 |
2 files changed, 45 insertions, 0 deletions
diff --git a/doc/board/broadcom/index.rst b/doc/board/broadcom/index.rst index a56bd1f..ca34afc 100644 --- a/doc/board/broadcom/index.rst +++ b/doc/board/broadcom/index.rst @@ -9,3 +9,4 @@ Broadcom bcm7xxx raspberrypi + northstar diff --git a/doc/board/broadcom/northstar.rst b/doc/board/broadcom/northstar.rst new file mode 100644 index 0000000..f4bc0ac --- /dev/null +++ b/doc/board/broadcom/northstar.rst @@ -0,0 +1,44 @@ +.. 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 |