On 06/05/2012 09:45 PM, Xie Shaohui-B21989 wrote: >> -----Original Message----- >> From: Wood Scott-B07421 >> Sent: Wednesday, June 06, 2012 2:14 AM >> To: Xie Shaohui-B21989 >> Cc: Wood Scott-B07421; u-boot@lists.denx.de; Tabi Timur-B04825 >> Subject: Re: [U-Boot] [PATCH] powerpc/CoreNet: add tool to support pbl >> image build. >> >> On 06/05/2012 12:35 AM, Xie Shaohui-B21989 wrote: >>>>> +++ b/board/freescale/corenet_ds/config.mk >>>>> @@ -0,0 +1,26 @@ >>>>> +# >>>>> + >>>>> +#PBL preamble and RCW header >>>>> +aa55aa55 010e0100 >>>>> +#64 bytes RCW data for P4080, replace it when building image #for >>>>> +P3041DS or P5020DS. >>>>> +4c580000 00000000 18185218 0000cccc 40464000 3c3c2000 58000000 >>>>> +61000000 00000000 00000000 00000000 008b6000 00000000 00000000 >>>>> +00000000 00000000 >>>> >>>> Could you have the tool source this from a separate file, rather than >>>> require the user to replace it manually? >>> >>> [Xie Shaohui] Then I have to prepare a separate file and a tool... >>> It is quite simple to replace, just copy and paste, and users may need >>> to modify the RCW when the default one does not fit their use case, >>> they will always have to do it manually. It's simple to do it here. >> >> I disagree that copy and paste is good enough, though taking an external >> RCW source (such as output from Timur's tool) could be a future >> enhancement. > > [Xie Shaohui] OK. Suppose we got the output from Timur's tool, what > should we do for the input if we need to change the RCW?
You change the input to Timur's tool -- that's what it's for. It compiles a textual description of the RCW settings into a PBL image. > Can Timur's > tool do it automatically, or by some arguments provided? And even > though, there will be two files for configuration, one is RCW output > from Timur's tool, and another is PBI commands. This is too much for > the tool; it has only one entry for configuration file. Too much for which tool, and why can't that be changed? >>>> Talk to Timur (when he gets back from vacation in a couple weeks) >>>> about his RCW tool and how best to accept the output it produces. >>>> >>>> Why is eSPI in here? Isn't this supposed to just generically write >>>> an image into CPC SRAM? >>> >>> [Xie Shaohui] No. some interfaces need to be pre-initialized before >>> PBL start to load stuff from it, and default configurations for SPI is >>> suitable, this tool provides a more compatible configurations. >> >> What do you mean by a more compatible configuration? If the default is >> good enough to load the first few PBL commands, why is it not goot enough >> to load the rest? > > [Xie Shaohui] the default configurations for SPI is too slow, it will > take more than half minutes to finish the loading. Please add a comment describing what you're doing to the SPI controller and why. Are there any situations where the faster speed you're programming won't work? -Scott _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
