To build u-boot on a Nyan Big Chromebook the docs outline adjusting the Tegra124 defined CONFIG_SYS_TEXT_BASE but this has since been moved to individual config files. We should have the default required for u-boot chain loading on the chromebook as the default CONFIG_SYS_TEXT_BASE and update the docs to remove this now non required step.

Signed-off-by: Peter Robinson pbrobinson@gmail.com --- configs/nyan-big_defconfig | 2 +- doc/README.chromium | 27 +++++++-------------------- 2 files changed, 8 insertions(+), 21 deletions(-)

diff --git a/configs/nyan-big_defconfig b/configs/nyan-big_defconfig index 7417622152..e05a610dd4 100644 --- a/configs/nyan-big_defconfig +++ b/configs/nyan-big_defconfig @@ -1,6 +1,6 @@ CONFIG_ARM=y CONFIG_TEGRA=y -CONFIG_SYS_TEXT_BASE=0x80110000 +CONFIG_SYS_TEXT_BASE=0x81000100 CONFIG_TEGRA124=y CONFIG_TARGET_NYAN_BIG=y CONFIG_DEFAULT_DEVICE_TREE="tegra124-nyan-big" diff --git a/doc/README.chromium b/doc/README.chromium index 7bf4d87447..45eaeced2d 100644 --- a/doc/README.chromium +++ b/doc/README.chromium @@ -43,26 +43,13 @@ https://git.collabora.com/cgit/user/tomeu/u-boot.git/commit/?h=nyan-big https://lists.denx.de/pipermail/u-boot/2017-May/289491.html https://github.com/chromeos-nvidia-androidtv/gnu-linux-on-acer-chromebook-13...

-1. Patch U-Boot - -Open include/configs/tegra124-common.h - -Change: - -#define CONFIG_SYS_TEXT_BASE 0x80110000 - -to: - -#define CONFIG_SYS_TEXT_BASE 0x81000100 - - -2. Build U-Boot +1. Build U-Boot

mkdir b make -j8 O=b/nyan-big CROSS_COMPILE=arm-linux-gnueabi- nyan-big_defconfig all

-3. Select a .its file +2. Select a .its file

Select something from doc/chromium which matches your board, or create your own. @@ -72,7 +59,7 @@ used by U-Boot. This is because the Chromebook expects to pass it to the kernel, and crashes if it is not present.

-4. Build and sign an image +3. Build and sign an image

./b/nyan-big/tools/mkimage -f doc/chromium/nyan-big.its u-boot-chromium.fit echo test >dummy.txt @@ -82,7 +69,7 @@ kernel, and crashes if it is not present. --bootloader dummy.txt --pack u-boot.kpart

-5. Prepare an SD card +4. Prepare an SD card

DISK=/dev/sdc # Replace with your actual SD card device sudo cgpt create $DISK @@ -91,12 +78,12 @@ kernel, and crashes if it is not present. sudo gdisk $DISK # Enter command 'w' to write a protective MBR to the disk

-6. Write U-Boot to the SD card +5. Write U-Boot to the SD card

sudo dd if=u-boot.kpart of=/dev/sdc1; sync

-7. Start it up +6. Start it up

Reboot the device in dev mode. Make sure that you have USB booting enabled. To do this, login as root (via Ctrl-Alt-forward_arrow) and type @@ -115,7 +102,7 @@ mode screen. It should show something like the following on the display: Tegra124 (Nyan-big) #

-8. Known problems +7. Known problems

On the serial console the word MMC is chopped at the start of the line: