On Sunday 05 April 2015 15:45:28 Sebastian Reichel wrote: > Hi, > > On Sun, Apr 05, 2015 at 03:26:14PM +0200, Pali Rohár wrote: > > > > > Yes so it seems, and the bootloaders should really set > > > > > it. It's also disabled for multiplatform builds. > > > > > > > > These are now done in u-boot as of: v2015.04-rc4 > > > > > > > > http://git.denx.de/?p=u-boot.git;a=commit;h=c6f90e1418a8 > > > > 4fe5 fa463b38403bd1845cb6a59c > > > > > > Seems like "include/configs/nokia_rx51.h" has been > > > forgotten. Note, that the kernel must still be able to > > > enable the bit itself (in case NOLO is used without > > > u-boot). > > > > You must not expect that bootloader set something. Nokia > > N900 has closed and signed bootloader which cannot be > > easily replaced and or fixed. > > > > For N900 there is U-Boot but it does not support lot of > > things (load kernel via usb or serial) so for developers it > > is better to use original Nokia bootloader. > > Yes, I'm aware of that. I think having the IBE bit set in > u-boot has advantages nevertheless. I think the kernel can't > enable the bit sufficiently early if its compiled in > thumb-mode itself (CONFIG_THUMB2_KERNEL). > > So I suggest to enable the IBE bit in the kernel (that part is > already done) *and* in u-boot. > > -- Sebastian Yes. Code for both (U-Boot and linux kernel) exists and are already included. In linux kernel code is since 3.14-rc6 and in U-Boot code is there since beginning of Nokia N900 support (2013.04) directly in board code. I believe that you guys do not remove or break that code :-) Nokia N900 needs slightly different code for setting IBE bit as other omap3 boards. For info is in commit message of commit 4748a7240284b0f68bd47a66365c2cd561939830. -- Pali Rohár pali.rohar@xxxxxxxxx
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