pamolloy

From 6482180e602c4853e43d5c5a40b3349b63aba276 Mon Sep 17 00:00:00 2001
From: Philip Molloy <philip-molloy@idexx.com>
Date: Tue, 2 Apr 2019 17:02:48 -0400
Subject: [PATCH 1/1] env: Exit tools when invalid CRC found

fw_setenv and fw_printenv currently print a warning and use a default
environment compiled into the binary when an invalid CRC is found. This
modifies the default behavior to print an error and exit. This is
especially important when calling the tools from a script since the 
script depends on the exit code of the tool to know something went

pamolloy

From e95f003a96096f7d8602ad2edaf1dd0bf4e27c45 Mon Sep 17 00:00:00 2001
From: Philip Molloy <philip@philipmolloy.com>
Date: Wed, 28 Aug 2019 21:05:11 -0400
Subject: [PATCH] Load a redundant environment from EEPROM

---
 env/eeprom.c | 128 +++++++++++++--------------------------------------
 1 file changed, 31 insertions(+), 97 deletions(-)

diff --git a/env/eeprom.c b/env/eeprom.c

pamolloy

FILE(GLOB PUBLIC_HEADERS ../include/*.h)
FILE(GLOB PUBLIC_COMMON_HEADERS ../include/common/*.h)
FILE(GLOB PUBLIC_MESSAGES_HEADERS ../include/messages/*.h)

add_library(foo STATIC ...)

set_property(TARGET foo APPEND PROPERTY PUBLIC_HEADER "${PUBLIC_HEADERS}")
set_property(TARGET foo APPEND PROPERTY PUBLIC_HEADER "${PUBLIC_COMMON_HEADERS}")
set_property(TARGET foo APPEND PROPERTY PUBLIC_HEADER "${PUBLIC_MESSAGES_HEADERS}")

pamolloy

#!/usr/bin/env bash
#
# See https://fedoramagazine.org/how-to-set-up-a-tftp-server-on-fedora/

sudo dnf install tftp-server

sudo systemctl enable tftp
sudo systemctl start tftp

sudo firewall-cmd --add-service=tftp --perm

pamolloy

The best resource for Chrome hardware is https://mrchromebox.tech/#devmode.

It seems like getting to a shell in order to install alternate firmware requires having ChromeOS installed. It is possible to create USB flash installation media using the following script and list of devices:

• https://dl.google.com/dl/edgedl/chromeos/recovery/linux_recovery.sh
• https://dl.google.com/dl/edgedl/chromeos/recovery/recovery.conf

I didn't trust running the script with super user privileges so I ran dd manually as follows:

pamolloy

I'm trying to install Fedora onto a pair of 250GB hard drives with either RAID0 or RAID1.

Debug logging

The issue seems to be the following from journal.txt:

Dec 05 21:27:51 server anaconda[1647]: program: Installing for i386-pc platform.
Dec 05 21:27:51 server anaconda[1647]: program: grub2-install: warning: ../grub-core/partmap/gpt.c:190:this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
Dec 05 21:27:51 server anaconda[1647]: program: grub2-install: error: embedding is not possible, but this is required for RAID and LVM install.

pamolloy

>>> linux foo-2019.02.26 Building
...
PATH="..." BR_BINARIES_DIR=/home/philip/repos/third-party/buildroot/output/images KBUILD_BUILD_VERSION=1 KBUILD_BUILD_USER=buildroot KBUILD_BUILD_HOST=buildroot KBUILD_BUILD_TIMESTAMP="Tue Jul  9 10:59:29 EDT 2019" KCFLAGS=-Wno-attribute-alias /usr/bin/make -j9 HOSTCC="/home/philip/repos/third-party/buildroot/output/per-package/linux/host/bin/ccache /usr/lib64/ccache/gcc -O2 -I/home/philip/repos/third-party/buildroot/output/per-package/linux/host/include -L/home/philip/repos/third-party/buildroot/output/per-package/linux/host/lib -Wl,-rpath,/home/philip/repos/third-party/buildroot/output/per-package/linux/host/lib" ARCH=arm64 INSTALL_MOD_PATH=/home/philip/repos/third-party/buildroot/output/per-package/linux/target CROSS_COMPILE="/home/philip/repos/third-party/buildroot/output/per-package/linux/host/bin/aarch64-linux-gnu-" DEPMOD=/home/philip/repos/third-party/buildroot/output/per-package/linux/host/sbin/depmod INSTALL_MOD_STRIP=1 -C /home/philip/repos/third-party/buildroo

pamolloy

U-Boot TPL 2020.07 (Jul 20 2021 - 21:07:08)
Channel 0: LPDDR4, 50MHz
BW=32 Col=10 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=2048MB
Channel 1: LPDDR4, 50MHz
BW=32 Col=10 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=2048MB
256B stride
256B stride
lpddr4_set_rate: change freq to 400000000 mhz 0, 1
lpddr4_set_rate: change freq to 800000000 mhz 1, 0
Trying to boot from BOOTROM

pamolloy

Remoteproc Driver Analysis: Evolution and Hybrid Implementations

1. Temporal Trends: Authorship Date vs. Implementation Style

The choice between the Standard Reset API and Syscon/Regmap is primarily driven by hardware architecture, but temporal trends show an evolution in how developers handle hardware complexity.

Comprehensive Authorship Date Table

The following table shows the original authorship date (first commit) for all drivers analyzed, sorted by date. This helps visualize the trends.

| Date | Driver | Category |

pamolloy

Config File	Start	End	Size (Hex)	Size (MB)
configs/am335x_guardian_defconfig	0x80000000	0x81000000	0x1000000	16.00
configs/amd_versal2_mini_defconfig	0x00000000	0x00001000	0x1000	0.00
configs/amd_versal2_virt_defconfig	0x00000000	0x00001000	0x1000	0.00
configs/ap121_defconfig	0x80100000	0x83f00000	0x3e00000	62.00
configs/ap143_defconfig	0x80100000	0x83f00000	0x3e00000	62.00
configs/ap152_defconfig	0x80100000	0x83f00000	0x3e00000	62.00
configs/apalis_imx6_defconfig	0x10000000	0x10010000	0x10000	0.06
configs/apalis-imx8_defconfig	0x88000000	0x89000000	0x1000000	16.00