From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ziyuan Xu Date: Fri, 22 Jul 2016 11:13:53 +0800 Subject: [U-Boot] [PATCH 0/4] Ability to load linux kernel on rock2 RK3288 In-Reply-To: References: <1468258732-8378-1-git-send-email-apatterson@sightlogix.com> Message-ID: <57918F71.7060305@rock-chips.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Standy, On 2016?07?14? 01:51, Sandy Patterson wrote: > I did a little more on this, and talked to someone else here. It seems > that my problem with loading the kernel including these patches is > specific to our kernel and after applying a local patch we have, it > appears to load fine. > > So this patchset gets me back to the same functionality in v2016.03. > > We're left with the puzzle of what's wrong on the RK3288 regarding > caching and memory. > > Sandy Patterson > > On Mon, Jul 11, 2016 at 1:38 PM, Sandy Patterson > > wrote: > > I wasn't able to load the linux kernel using a Rock2 board > using the latest master branch. The board hangs after it has > handed executing over to the kernel. I found that the latest release > that worked was v2016.03. > > I did some searching and I suspect the problem may be cache related. > > This patchset allows the kernel to start by reverting two problem > commits and disabling EFI_LOADER which I suspect rubs the caching the > wrong way. We also found that the 512M limit for fdt and initrd is > now 256M. > I'm not sure why this is. > I just tried to boot linux kernel on my rk3288 board with the latest u-boot. Everything looks sane. board: rk3288-fennec u-boot: branch u-boot-rockchip/master, also enable CONFIG_EFI_LOADER boot device: eMMC bootcmd: mmc dev 1; mmc read 0x2000000 0x14000 0x10000; bootz 0x2000000 (custom partitions layout ) Could try again, let me know if you still have any problem. > > > This still doesn't work 100%. I think it's not initializing the SD > card > volages correctly, but at least the Kernel is loading. > > I also am not sure changing the caching for all armv7 is the right > answer. I wasn't too sure about the revert. I am not very familiar > with > this low level stuff. > > Sandy Patterson > > > Sandy Patterson (4): > Revert "arm: Replace > v7_maint_dcache_all(ARMV7_DCACHE_CLEAN_INVAL_ALL) > with asm code" > Revert "arm: Replace v7_maint_dcache_all(ARMV7_DCACHE_INVAL_ALL) > with > asm code" > Disable CONFIG_EFI_LOADER for rock2. > RK3288 needs fdt and initrd below 256M now. > > arch/arm/cpu/armv7/Makefile | 2 +- > arch/arm/cpu/armv7/cache_v7.c | 135 > ++++++++++++++++++++++- > arch/arm/cpu/armv7/cache_v7_asm.S | 154 > --------------------------- > arch/arm/mach-uniphier/arm32/lowlevel_init.S | 67 +++++++++++- > configs/rock2_defconfig | 1 + > include/configs/rk3288_common.h | 6 +- > 6 files changed, 201 insertions(+), 164 deletions(-) > delete mode 100644 arch/arm/cpu/armv7/cache_v7_asm.S > > -- > 1.9.1 > >