From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Date: Fri, 3 May 2013 17:55:14 +0200 Subject: [U-Boot] [PATCH] mx23: Add a README file In-Reply-To: <1367596269-20147-1-git-send-email-festevam@gmail.com> References: <1367596269-20147-1-git-send-email-festevam@gmail.com> Message-ID: <201305031755.14985.marex@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Dear Fabio Estevam, > From: Fabio Estevam > > Provide instructions on how to build U-boot and flash the binary into an SD > card for a mx23 based platform. Can most of this not be shared with MX28 ? > Signed-off-by: Fabio Estevam > --- > doc/README.mx23_common | 145 > ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 145 > insertions(+) > create mode 100644 doc/README.mx23_common > > diff --git a/doc/README.mx23_common b/doc/README.mx23_common > new file mode 100644 > index 0000000..dcf0ba4 > --- /dev/null > +++ b/doc/README.mx23_common > @@ -0,0 +1,145 @@ > +Booting U-boot on a MX23 processor > +================================== > + > +This document describes the MX23 U-Boot port. This document mostly > +covers topics related to making the module/board bootable. > + > +Terminology > +----------- > + > +The dollar symbol ($) introduces a snipped of shell code. This shall be > typed +into the unix command prompt in U-Boot source code root directory. > + > +The (=>) introduces a snipped of code that should by typed into U-Boot > command +prompt > + > +Contents > +-------- > + > +1) Prerequisites > +2) Compiling U-Boot for a MX23 based board > +3) Installation of U-Boot for a MX23 based board to SD card > + > +1) Prerequisites > +---------------- > + > +To make a MX23 based board bootable, some tools are necessary. The first > one +is the "elftosb" tool distributed by Freescale Semiconductor. The > other one +is the "mxsboot" tool found in U-Boot source tree. > + > +Firstly, obtain the elftosb archive from the following location: > + > + ftp://ftp.denx.de/pub/tools/elftosb-10.12.01.tar.gz > + > +We use a $VER variable here to denote the current version. At the time of > +writing of this document, that is "10.12.01". To obtain the file from > command +line, use: > + > + $ VER="10.12.01" > + $ wget ftp://ftp.denx.de/pub/tools/elftosb-${VER}.tar.gz > + > +Extract the file: > + > + $ tar xzf elftosb-${VER}.tar.gz > + > +Compile the file. We need to manually tell the linker to use also libm: > + > + $ cd elftosb-${VER}/ > + $ make LIBS="-lstdc++ -lm" elftosb > + > +Optionally, remove debugging symbols from elftosb: > + > + $ strip bld/linux/elftosb > + > +Finally, install the "elftosb" binary. The "install" target is missing, so > just +copy the binary by hand: > + > + $ sudo cp bld/linux/elftosb /usr/local/bin/ > + > +Make sure the "elftosb" binary can be found in your $PATH, in this case > this +means "/usr/local/bin/" has to be in your $PATH. > + > +2) Compiling U-Boot for a MX23 based board > +------------------------------------------- > + > +Compiling the U-Boot for a MX23 board is straightforward and done as > compiling U-Boot +for any other ARM device. For cross-compiler setup, > please refer to ELDK5.0 +documentation. First, clean up the source code: > + > + $ make mrproper > + > +Next, configure U-Boot for a MX23 based board > + > + $ make _config > + > +Examples: > + > +1. For building U-boot for Freescale MX23EVK board: > + > + $ make mx23evk_config > + > +2. For building U-boot for Olimex MX23 Olinuxino board: > + > + $ make mx23_olinuxino_config > + > +Lastly, compile U-Boot and prepare a "BootStream". The "BootStream" is a > special +type of file, which the i.MX23 CPU can boot. This is handled by > the following +command: > + > + $ make u-boot.sb > + > +HINT: To speed-up the build process, you can add -j, where N is number > of + compiler instances that'll run in parallel. > + > +The code produces "u-boot.sb" file. This file needs to be augmented with a > +proper header to allow successful boot from SD or NAND. Adding the header > is +discussed in the following chapters. > + > +3) Installation of U-Boot for a MX23 based board to SD card > +----------------------------------------------------------- > + > +To boot a MX23 based board from a SD connected to SSP1 or SSP2, set the > boot +mode DIP switches according to i.MX23 manual section 35.1.2 (Table > 35-3). + > +An SD card the i.MX23 CPU can use to boot U-Boot must contain a DOS > partition +table, which in turn carries a partition of special type and > which contains a +special header. The rest of partitions in the DOS > partition table can be used +by the user. > + > +To prepare such partition, use your favourite partitioning tool. The > partition +must have the following parameters: > + > + * Start sector .......... sector 2048 > + * Partition size ........ at least 1024 kb > + * Partition type ........ 0x53 (sometimes "OnTrack DM6 Aux3") > + > +For example in Linux fdisk, the sequence for a clear card follows. Be sure > to +run fdisk with the option "-u=sectors" to set units to sectors: > + > + * o ..................... create a clear partition table > + * n ..................... create new partition > + * p ............. primary partition > + * 1 ............. first partition > + * 2048 .......... first sector is 2048 > + * +1M ........... make the partition 1Mb big > + * t 1 ................... change first partition ID > + * 53 ............ change the ID to 0x53 (OnTrack DM6 Aux3) > + * > + * w ..................... write partition table to disk > + > +The partition layout is ready, next the special partition must be filled > with +proper contents. The contents is generated by running the following > command +(see chapter 2)): > + > + $ ./tools/mxsboot sd u-boot.sb u-boot.sd > + > +The resulting file, "u-boot.sd", shall then be written to the partition. > In this +case, we assume the first partition of the SD card is > /dev/mmcblk0p1: + > + $ sudo dd if=u-boot.sd of=/dev/mmcblk0p1; sync > + > +Last step is to insert the card into MX23 based board and boot. > + > +NOTE: If the user needs to adjust the start sector, the "mxsboot" tool > contains + a "-p" switch for that purpose. The "-p" switch takes the > sector number as + an argument. Best regards, Marek Vasut