[bootlin/training-materials updates] master: Boot time labs: work-around for Falcon Mode support (91948234)
Thomas Petazzoni
thomas.petazzoni at bootlin.com
Fri Oct 29 10:46:36 CEST 2021
Repository : https://github.com/bootlin/training-materials
On branch : master
Link : https://github.com/bootlin/training-materials/commit/9194823469be3ed895823740937c65966601d5fe
>---------------------------------------------------------------
commit 9194823469be3ed895823740937c65966601d5fe
Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
Date: Wed Apr 14 11:01:46 2021 +0200
Boot time labs: work-around for Falcon Mode support
Signed-off-by: Michael Opdenacker <michael.opdenacker at bootlin.com>
>---------------------------------------------------------------
9194823469be3ed895823740937c65966601d5fe
labs/boot-time-bootloader/boot-time-bootloader.tex | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/labs/boot-time-bootloader/boot-time-bootloader.tex b/labs/boot-time-bootloader/boot-time-bootloader.tex
index 901ceb60..a9abe80b 100644
--- a/labs/boot-time-bootloader/boot-time-bootloader.tex
+++ b/labs/boot-time-bootloader/boot-time-bootloader.tex
@@ -18,6 +18,11 @@ you've surely been longing to do.
\section{Recompiling the bootloader}
+{\bf Importante note}: for this lab, because of issues with Falcon Mode
+in U-Boot 2019.01 that we are currently investigating, you will have to
+switch back to the 2019.01 version of U-Boot, configured with its
+\code{am335x_boneblack_defconfig} file.
+
It's now time to eliminate useless features in U-Boot. Go to
\code{~/boot-time-labs/bootloader/u-boot/} and run \code{make
menuconfig} to unselect features that we don't need in our system.
@@ -38,9 +43,9 @@ time and fill the below table:
Step & Duration & Description \\
\hline
\hline
- U-Boot SPL & & Between \code{U-Boot SPL 2021.04} and \code{U-Boot 2021.04} \\
+ U-Boot SPL & & Between \code{U-Boot SPL 2019.01} and \code{U-Boot 2019.01} \\
\hline
- U-Boot & & Between \code{U-Boot 2021.04} and \code{Starting kernel} \\
+ U-Boot & & Between \code{U-Boot 2019.01} and \code{Starting kernel} \\
\hline
Kernel + Init scripts & & Between \code{Starting kernel} and \code{Starting ffmpeg} \\
\hline
@@ -77,9 +82,9 @@ latest results:
Step & Duration & Description \\
\hline
\hline
- U-Boot SPL & & Between \code{U-Boot SPL 2021.04} and \code{U-Boot 2021.04} \\
+ U-Boot SPL & & Between \code{U-Boot SPL 2019.01} and \code{U-Boot 2019.01} \\
\hline
- U-Boot & & Between \code{U-Boot 2021.04} and \code{Starting kernel} \\
+ U-Boot & & Between \code{U-Boot 2019.01} and \code{Starting kernel} \\
\hline
Kernel + Init scripts & & Between \code{Starting kernel} and \code{Starting ffmpeg} \\
\hline
@@ -198,7 +203,7 @@ When it works, update your table again:
Step & Duration & Description \\
\hline
\hline
- U-Boot SPL & & Between \code{U-Boot SPL 2021.04} and \code{Starting kernel} \\
+ U-Boot SPL & & Between \code{U-Boot SPL 2019.01} and \code{Starting kernel} \\
\hline
Kernel + Init scripts & & Between \code{Starting kernel} and \code{Starting ffmpeg} \\
\hline
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