From mboxrd@z Thu Jan 1 00:00:00 1970 From: Prabhakar Lad Date: Wed, 22 Aug 2012 14:37:08 +0530 Subject: [U-Boot] [PATCH v2 16/18] da850_am18xxevm: Add README.da850_am18xxevm In-Reply-To: References: <1345481154-7050-1-git-send-email-trini@ti.com> <1345481154-7050-17-git-send-email-trini@ti.com> Message-ID: <5034A13C.8080303@ti.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi, On Wednesday 22 August 2012 01:43 PM, Christian Riesch wrote: > [cc'd Manjunath Hadli] > > Hi Tom, > > On Mon, Aug 20, 2012 at 6:45 PM, Tom Rini wrote: >> Add a board-specific README that documents how to write u-boot.ais to >> the SPI found on this board. >> >> Changes-series: 2 >> - Add >> >> Signed-off-by: Tom Rini >> --- >> >> board/davinci/da8xxevm/README.da850_am18xxevm | 53 +++++++++++++++++++++++++ >> 1 file changed, 53 insertions(+) >> create mode 100644 board/davinci/da8xxevm/README.da850_am18xxevm >> >> diff --git a/board/davinci/da8xxevm/README.da850_am18xxevm b/board/davinci/da8xxevm/README.da850_am18xxevm >> new file mode 100644 >> index 0000000..382b718 >> --- /dev/null >> +++ b/board/davinci/da8xxevm/README.da850_am18xxevm >> @@ -0,0 +1,53 @@ >> +Summary >> +======= >> +The README is for the boot procedure used for the LogicPD AM1808 EVM. >> + >> +The board is booted in three stages. The initial bootloader which executes >> +upon reset is the Rom Boot Loader(RBL) which sits in the internal ROM. The >> +RBL initialises the memory and the SPI controller and reads the AIS image >> +starting at block 0. This image can contain both the SPL and U-Boot >> +binaries. >> + >> +AIS is an image format defined by TI for the images that are to be >> +loaded to memory by the RBL. The image is divided into a series of >> +sections and the image's entry point is specified. Each section comes >> +with meta data like the target address the section is to be copied to >> +and the size of the section, which is used by the RBL to load the >> +image. At the end of the image the RBL jumps to the image entry >> +point. >> + >> +The secondary stage bootloader(spl) which is loaded by the RBL then loads >> +the u-boot from a predefined location in SPI to DDR and jumps to the u-boot >> +entry point. >> + >> + >> +Compilation >> +=========== >> +To build a SPI-bootable image, run 'make da850_am18xxevm'. This will build > > da850_am18xxevm is for the Spectrum Digital EVM for the AM1808. For > the Logic PD board you will need 'make da850evm'. See [1] > May be having a common README for am18x and omap-l138 would be good ? Thx, --Prabhakar > Regards, Christian > > > [1] http://lists.denx.de/pipermail/u-boot/2012-February/117082.html > >> +the u-boot.ais file that needs to be written to SPI flash. >> + >> + >> +Flashing the images to Nand >> +=========================== >> +The AIS image can be written to SPI flash using the following commands. >> +Assuming that the network is configured and enabled and the u-boot.ais file >> +is tftp'able. >> + >> +U-Boot > sf probe 0 >> +U-Boot > sf erase 0 +320000 >> +U-Boot > tftp u-boot.ais >> +U-Boot > sf write c0700000 0 $filesize >> + >> + >> +Recovery >> +======== >> + >> +In the case of a "bricked" board, you need to use the TI tools found >> +here[1] to write a UBL file and u-boot.bin. Once the system is running >> +again from these tools a good u-boot.ais may be re-written to SPI flash. >> + >> + >> +Links >> +===== >> +[1] >> + http://processors.wiki.ti.com/index.php/Serial_Boot_and_Flash_Loading_Utility_for_OMAP-L137 >> -- >> 1.7.9.5 >> >> _______________________________________________ >> U-Boot mailing list >> U-Boot at lists.denx.de >> http://lists.denx.de/mailman/listinfo/u-boot > _______________________________________________ > U-Boot mailing list > U-Boot at lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot >