CC'ed Sekhar On Wednesday 22 August 2012 08:39 PM, Christian Riesch wrote: > Hi Prabhakar, > > On Wednesday, August 22, 2012, Prabhakar Lad wrote: > > Hi Christian, > > On Wednesday 22 August 2012 02:47 PM, Christian Riesch wrote: > > Hi Prabhakar, > > > > On Wed, Aug 22, 2012 at 11:07 AM, Prabhakar Lad > <prabhakar....@ti.com <javascript:;>> wrote: > >> 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 <tr...@ti.com > <javascript:;>> 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 <javascript:;>> > >>>> --- > >>>> > >>>> 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 ? > >> > > > > This is a good idea. > > > > But just to make it clear: Afaik the da850evm configuration works for > > both the AM1808 and the OMAP-L138 board from LogicPD (at least I am > > using it with the AM1808 experimenter's kit from LogicPD). The > > da850_am18xxevm is for the Spectrum Digital board. At least this is > > what I understood from the discussion with Manjunath Hadli in the in > > the u-boot mailing list thread I cited earlier. I hope this is > > correct, I haven't got other boards than the AM1808 board from LogicPD > > to test. > > > AFAIK the difference between AM1808 and OMAP-L138 is that, > 1: The AM1808 has EEPROM and stores the MAC address in it where as > OMAP-L138 stores the MAC address in SPI flash. > > > Are you sure? I don't see that in datasheets/schematics. > Can you help here ?
Thx, --Prabhakar > Christian > > > > 2: The revision number differs for both. > > Thx, > --Prabhakar > > > > > > > Regards, Christian > > > > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de <javascript:;> > http://lists.denx.de/mailman/listinfo/u-boot > _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
