From 3d8cf91b89c107cd55a5ee708aa091aec65111dd Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Tue, 30 Sep 2014 15:07:26 +0200 Subject: Documentation: Add some TI AM335x specific documentation Signed-off-by: Sascha Hauer --- Documentation/boards/am335x.rst | 42 +++++++++++++++++++++++++++++++++++++++++ Documentation/boards/omap.rst | 4 ++-- Documentation/user/barebox.rst | 2 ++ 3 files changed, 46 insertions(+), 2 deletions(-) create mode 100644 Documentation/boards/am335x.rst (limited to 'Documentation') diff --git a/Documentation/boards/am335x.rst b/Documentation/boards/am335x.rst new file mode 100644 index 0000000000..7959b84c8d --- /dev/null +++ b/Documentation/boards/am335x.rst @@ -0,0 +1,42 @@ +Texas Instruments AM335x +======================== + +The Texas Instruments AM335x SoCs have a two-stage boot process. The first stage +loader, also known as MLO is loaded by the ROM code. The MLO loads the second stage +loader from the same medium. + +Building barebox +---------------- + +The TI AM335x boards in barebox are covered by the ``am335x_mlo_defconfig`` +for the MLO and ``am335x_defconfig`` for the regular barebox image. The +resulting images will be placed under ``images/``: + +:: + barebox-am33xx-afi-gf.img + barebox-am33xx-afi-gf-mlo.img + barebox-am33xx-beaglebone.img + barebox-am33xx-beaglebone-mlo.img + barebox-am33xx-phytec-phycore.img + barebox-am33xx-phytec-phycore-mlo-1x128m16.img + barebox-am33xx-phytec-phycore-mlo-1x256m16.img + barebox-am33xx-phytec-phycore-mlo-1x512m16.img + +Some boards come in different variants, make sure to pick the correct one. + +Starting and updating barebox +----------------------------- + +SPI NOR and NAND +^^^^^^^^^^^^^^^^ + +The regular board images can be started from another bootloader, see +:ref:`second_stage`. The board should provide update handlers +to update (or initially install) barebox on SPI NOR or NAND, see :ref:`update`. + +SD/MMC +^^^^^^ + +To start barebox from SD/MMC prepare a card with a FAT filesystem. Copy the MLO +file for your board to the card and name it ``MLO``. Copy the regular image +for your board to the card and name it ``barebox.bin``. diff --git a/Documentation/boards/omap.rst b/Documentation/boards/omap.rst index 5038613335..c2697510c5 100644 --- a/Documentation/boards/omap.rst +++ b/Documentation/boards/omap.rst @@ -1,5 +1,5 @@ -Texas Instruments OMAP/AM335x -============================= +Texas Instruments OMAP +====================== Texas Instruments OMAP SoCs have a two-stage boot process. The first stage is known as Xload which only loads the second stage bootloader. barebox can act as diff --git a/Documentation/user/barebox.rst b/Documentation/user/barebox.rst index caf544de9f..00ceabb925 100644 --- a/Documentation/user/barebox.rst +++ b/Documentation/user/barebox.rst @@ -171,6 +171,8 @@ the compilation process will finish with a list of images built under ``images/` barebox-guf-santaro.img barebox-gk802.img +.. _second_stage: + Starting barebox ----------------- -- cgit v1.2.3