On Wed, Aug 22, 2012 at 10:13:02AM +0200, Christian Riesch wrote: > [cc'd Manjunath Hadli] > > Hi Tom, > > On Mon, Aug 20, 2012 at 6:45 PM, Tom Rini <tr...@ti.com> 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 <tr...@ti.com> > > --- > > > > 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]
This is funny since the Logic PD board is also called the "AM1808 Evaluation Module" rather than a "Davinci" EVM. So the README needs a little more work :) I'll update and rename. -- Tom _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
