Hi, > -----Original Message----- > From: u-boot-boun...@lists.denx.de [mailto:u-boot-boun...@lists.denx.de] > On Behalf Of Jan Kiszka > Sent: Monday, November 10, 2014 6:56 PM > To: Marc Zyngier > Cc: u-boot@lists.denx.de > Subject: Re: [U-Boot] ARM: PSCI 0.1 vs 0.2 > > On 2014-11-10 14:08, Marc Zyngier wrote: > > On 10/11/14 12:51, Jan Kiszka wrote: > >> Hi Marc, > >> > >> what is the motivation to expose a PSCI 0.1 interface in U-boot, > >> instead of 0.2? Support for preexisting users of 0.1? The kernel > >> seems to be happy with both, and I'm now wondering if we should > >> actually add the legacy version to Jailhouse as well (I hope we can > avoid this). > > > > The initial rational was simple: at the time this code was written, > > the > > 0.2 spec still in review, and nobody was implementing it. Supporting > > 0.1 was the only viable use-case. > > > >> Still studying the logic: Is it possible to provide both interfaces, > >> and would it make sense? > > > > Supporting both is very easy. Just output the 0.2 function numbers > > that actually make sense for 0.1 and have both compatible strings. > > Ah, cool - parameters and return values of, say, CPU_ON/OFF are > compatible across both versions? > > Jan > > --
We did send out some ARMv8 PSCI v0.2 u-boot patches, which can be seen here: http://permalink.gmane.org/gmane.comp.boot-loaders.u-boot/194210 Regards, Bhupesh _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
