On 06/06/2018 08:47 PM, Marek Vasut wrote: > On 05/31/2018 12:00 PM, Marek Vasut wrote: >> On 05/31/2018 11:52 AM, See, Chin Liang wrote: >>> On Tue, 2018-05-29 at 18:39 +0200, Marek Vasut wrote: >>>> Make sure the ARM ACTLR register has correct configuration, otherwise >>>> the Linux kernel refuses to boot. In particular, the "Write Full Line >>>> of Zeroes" bit must be cleared. >>>> >>>> Signed-off-by: Marek Vasut <ma...@denx.de> >>>> Cc: Chin Liang See <chin.liang....@intel.com> >>>> Cc: Dinh Nguyen <dingu...@kernel.org> >>>> --- >>>> NOTE: This gem was well hidden in the Altera U-Boot fork and is >>>> really needed. >>>> What is not entirely clear to me is WHY ? So why is this needed >>>> ? >>> >>> I vaguely recall it's related to HW constrain. And check back the >>> downstream U-Boot, actually we need to set the bit instead clearing >>> it. https://github.com/altera-opensource/u-boot-socfpga/blob/socfpga_v2 >>> 014.10_arria10_bringup/arch/arm/cpu/armv7/socfpga_arria10/pl310.c >> >> You are clearing it here: >> https://github.com/altera-opensource/u-boot-socfpga/blob/socfpga_v2014.10_arria10_bringup/arch/arm/cpu/armv7/socfpga_arria10/lowlevel_init.S#L35 >> >> The PL310 configuration is a different register. What HW constraint ? >> I'd really like to understand this problem. > > Bump ? I had a report the register even has to be set to 0 , otherwise > there are ethernet problems. What is going on with this register ?
Bump again ? -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
