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 <[email protected]> >>> Cc: Chin Liang See <[email protected]> >>> Cc: Dinh Nguyen <[email protected]> >>> --- >>> 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 ? -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
