Messages in this thread | | | Date | Thu, 10 Mar 2011 17:06:27 +0100 | From | David Jander <> | Subject | Re: [PATCHv2 1/2] ARM: mx51: Implement code to allow mx51 to enter WFI |
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On Thu, 10 Mar 2011 14:37:15 +0100 "s.hauer@pengutronix.de" <s.hauer@pengutronix.de> wrote:
> Hi David, > > On Tue, Mar 08, 2011 at 12:40:23PM +0100, David Jander wrote: > > > > Hi Sascha, > > > > On Mon, 7 Mar 2011 19:07:00 +0100 > > "s.hauer@pengutronix.de" <s.hauer@pengutronix.de> wrote: > > >[...] > > > > The current imx for-next tree is not booting on my Babbage board. Is > > > > it okay for you with your HW. I'll have to debug the booting part > > > > first. > > > > > > Probably because other than kconfig states i.MX51 and i.MX53 cannot be > > > compiled in one kernel. the for-next branch boots fine on my babbage. > > > > Would you mind explaining (or pointing to an explanation) as to why this is > > not supposed to work? Given the high level of compatibility between MX51 > > and MX53, I'd say there must be a very good reason not to enable a single > > binary kernel for both. Or is this just temporary brokenness? > > i.MX51 and i.MX53 have different phys_offsets. Look at > arch/arm/mach-mx5/Makefile.boot: > > zreladdr-$(CONFIG_ARCH_MX50) := 0x70008000 > params_phys-$(CONFIG_ARCH_MX50) := 0x70000100 > initrd_phys-$(CONFIG_ARCH_MX50) := 0x70800000 > zreladdr-$(CONFIG_ARCH_MX51) := 0x90008000 > params_phys-$(CONFIG_ARCH_MX51) := 0x90000100 > initrd_phys-$(CONFIG_ARCH_MX51) := 0x90800000 > zreladdr-$(CONFIG_ARCH_MX53) := 0x70008000 > params_phys-$(CONFIG_ARCH_MX53) := 0x70000100 > initrd_phys-$(CONFIG_ARCH_MX53) := 0x70800000 > > Compiling a kernel for i.MX50 and i.MX53 will work, but compiling a > kernel for i.MX51 and i.MX53 will and up with a kernel assuming SDRAM > at 0x70000000 which will fail on a i.MX51. We need > phys_to_virt/virt_to_phys runtime patching to get this right. This > will be merged in the next merge window.
Ok, so it classifies as "temporary brokenness" ;-) Thanks a lot for clarifying.
Best regards,
-- David Jander Protonic Holland.
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