On Mon, Aug 05, 2013 at 02:49:58PM -0600, Stephen Warren wrote: > On 08/05/2013 02:43 PM, Wolfgang Denk wrote: > ... > > Please look into Tom's proposal to got the SPL / Falcon mode way. I > > fully agre with him there. > > From my reading of doc/README.falcon, in order to use it, you still must > set everything up in order to do a full non-falcon boot, and then simply > save a serialized version of the zImage/DTB/bootargs/... using a special > U-Boot command.
You must setup a certain amount of things, yes. And from what you've documented in the i2c thread about the Tegra orer, it depends a bit on the SoC. [snip] > And also, if a distro installs an updated kernel, how does it tell > U-Boot to invalidate the previously serialized data that falcon mode > uses to boot, and re-create it using the new kernel image? Dirty "secret" time, with device trees, it's just the device tree we loaded, with whatever run-time fixups are done. Doing this from the Linux side is a solvable problem. > So to me, falcon mode seems like a somewhat unrelated topic, and purely > an optimization. Yes, it's an optimization that I would like to see taken advantage of. I like the speed at which my laptop boots into Linux, and I would like to see that just as much if I was using an ARM board in a generic laptop enclosure. -- Tom
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