有人可以给我建议为 Raspberrypi 平台制作 openbmc 图像吗？在尝试之前，我查看了相关文档，并认为可以在 Raspberrypi 上使用 openbmc 映像。喜欢带有 Raspberry Pi（2 或 3）的 OpenBMC 并构建 bmcweb？ 和https://kevinleeblog.github.io/project1/2019/11/25/openbmc-for-raspberry-pi-zero/。
所以，我按照这些说明并尝试了以下步骤。
#1：Git 克隆 openbmc.git 到我的本地 PC。
tm@tm-VB1:~/Rpi4-64$ git clone https://github.com/openbmc/openbmc.git
Snip the logs but it looks no problem.
Receiving objects: 100% (182121/182121), 84.10 MiB | 5.55 MiB/s, done.
Resolving deltas: 100% (96860/96860), done.
#2：为 raspberrypi 设置 TEMPLATECONF
tm@tm-VB1:~/Rpi4-64$ export TEMPLATECONF=meta-evb/meta-evb-raspberrypi/conf
tm@tm-VB1:~/Rpi4-64$ echo $TEMPLATECONF
meta-evb/meta-evb-raspberrypi/conf
#3：通过“openbmc-env”设置环境
tm@tm-VB1:~/Rpi4-64/openbmc$ . openbmc-env
### Initializing OE build env ###
Snip the logs but it looks no problem. As you know, the script automatically creates a subdirectory,build, under openbmc.
Common targets are:
obmc-phosphor-image
tm@tm-VB1:~/Rpi4-64/openbmc/build$
#4：更改目录并为我的 Raspberrypi 平台编辑 local.conf。
tm@tm-VB1:~/Rpi4-64/openbmc/build$ cat ./conf/local.conf
Snip the log for unchanged part.
MACHINE ??= "raspberrypi4-64" <<< Change here for my platform.
DL_DIR ?= "/home/tm/Yocto/downloads" <<< Add here for build-time reduction at retry.
SSTATE_DIR ?= "/home/tm/Yocto/sstate-cache" <<< Add here for build-time reduction at retry.
#5：根据以下建议更改 FLASH_SIZE 变量。 https://github.com/openbmc/openbmc/issues/3590
tm@tm-VB1:~/Rpi4-64/openbmc/meta-phosphor/classes$ cat image_types_phosphor.bbclass
Snip the log.
# Flash characteristics in KB unless otherwise noted
FLASH_SIZE ?= "131072" <<< I changed only this variable from 32768 to 131072.
#6：bitbake 开始。
tm@tm-VB1:~/Rpi4-64/openbmc/bitbake obmc-phosphor-image
然后，错误发生了。
ERROR: Logfile of failure stored in: /home/tm/Rpi/openbmc/build/tmp/work/raspberrypi-openbmc-linux-gnueabi/obmc-phosphor-image/1.0-r0/temp/log.do_generate_static.2055074
DEBUG: Executing python function do_generate_static
DEBUG: Executing shell function do_mk_static_nor_image
32768+0 records in
32768+0 records out
33554432 bytes (34 MB, 32 MiB) copied, 0.09147 s, 367 MB/s
DEBUG: Shell function do_mk_static_nor_image finished
DEBUG: Considering file size=495980 name=/home/tm/Rpi/openbmc/build/tmp/deploy/images/raspberrypi/u-boot.bin
DEBUG: Spanning start=0K end=512K
DEBUG: Compare needed=495980 available=524288 margin=28308
484+1 records in
484+1 records out
495980 bytes (496 kB, 484 KiB) copied, 0.00120141 s, 413 MB/s
DEBUG: Considering file size=8266960 name=/home/tm/Rpi/openbmc/build/tmp/deploy/images/raspberrypi/fitImage-obmc-phosphor-initramfs-raspberrypi-raspberrypi
DEBUG: Spanning start=512K end=4864K
>>>DEBUG: Compare needed=8266960 available=4456448 margin=-3810512
ERROR: Image '/home/tm/Rpi/openbmc/build/tmp/deploy/images/raspberrypi/fitImage-obmc-phosphor-initramfs-raspberrypi-raspberrypi' is too large!
DEBUG: Python function do_generate_static finished
它说边距=-3810512。
现在，我的第二次尝试。 我删除了整个 openbmc 目录并执行了上述相同的步骤。但这一次，我将 FLASH_SIZE 从 32768 更改为 262144。结果与下图相同。
ERROR: obmc-phosphor-image-1.0-r0 do_generate_static: Image '/home/tm/Rpi4/openbmc/build/tmp/deploy/images/raspberrypi4/u-boot.bin' is too large!
ERROR: Logfile of failure stored in: /home/tm/Rpi4/openbmc/build/tmp/work/raspberrypi4-openbmc-linux-gnueabi/obmc-phosphor-image/1.0-r0/temp/log.do_generate_static.2061792
ERROR: Task (/openbmc/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb:do_generate_static) failed with exit code '1'
NOTE: Tasks Summary: Attempted 3915 tasks of which 2633 didn't need to be rerun and 1 failed.
Summary: 1 task failed:
/openbmc/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb:do_generate_static
Summary: There were 2 WARNING messages shown.
Summary: There was 1 ERROR message shown, returning a non-zero exit code.
tm@tm-VB1:~/Rpi4/openbmc/build$ cat /home/tm/Rpi4/openbmc/build/tmp/work/raspberrypi4-openbmc-linux-gnueabi/obmc-phosphor-image/1.0-r0/temp/log.do_generate_static.2061792
DEBUG: Executing python function do_generate_static
DEBUG: Executing shell function do_mk_static_nor_image
32768+0 records in
32768+0 records out
33554432 bytes (34 MB, 32 MiB) copied, 0.177223 s, 189 MB/s
DEBUG: Shell function do_mk_static_nor_image finished
DEBUG: Considering file size=548224 name=/home/tm/Rpi4/openbmc/build/tmp/deploy/images/raspberrypi4/u-boot.bin
DEBUG: Spanning start=0K end=512K
>>>DEBUG: Compare needed=548224 available=524288 margin=-23936
ERROR: Image '/home/tm/Rpi4/openbmc/build/tmp/deploy/images/raspberrypi4/u-boot.bin' is too large!
DEBUG: Python function do_generate_static finished
tm@tm-VB1:~/Rpi4/openbmc/build$
它说边距=-23936。
好的。图片太大。所以，我的第三次尝试。我删除了整个 openbmc 目录并执行了上述相同的步骤。但这一次，我将 FLASH_SIZE 从 32768 更改为 9437184。结果与下图相同。
ERROR: obmc-phosphor-image-1.0-r0 do_generate_static: Image '/home/tm/Rpi4/openbmc/build/tmp/deploy/images/raspberrypi4/u-boot.bin' is too large!
ERROR: Logfile of failure stored in: /home/tm/Rpi4/openbmc/build/tmp/work/raspberrypi4-openbmc-linux-gnueabi/obmc-phosphor-image/1.0-r0/temp/log.do_generate_static.2058361
ERROR: Task (/openbmc/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb:do_generate_static) failed with exit code '1'
NOTE: Tasks Summary: Attempted 3935 tasks of which 0 didn't need to be rerun and 1 failed.
Summary: 1 task failed:
/openbmc/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb:do_generate_static
Summary: There were 4 WARNING messages shown.
Summary: There was 1 ERROR message shown, returning a non-zero exit code.
tm@tm-VB1:~/Rpi4/openbmc$
tm@tm-VB1:~/Rpi4/openbmc$ cat /home/tm/Rpi4/openbmc/build/tmp/work/raspberrypi4-openbmc-linux-gnueabi/obmc-phosphor-image/1.0-r0/temp/log.do_generate_static.2058361
DEBUG: Executing python function do_generate_static
DEBUG: Executing shell function do_mk_static_nor_image
32768+0 records in
32768+0 records out
33554432 bytes (34 MB, 32 MiB) copied, 0.173685 s, 193 MB/s
DEBUG: Shell function do_mk_static_nor_image finished
DEBUG: Considering file size=548224 name=/home/tm/Rpi4/openbmc/build/tmp/deploy/images/raspberrypi4/u-boot.bin
DEBUG: Spanning start=0K end=512K
>>>DEBUG: Compare needed=548224 available=524288 margin=-23936
ERROR: Image '/home/tm/Rpi4/openbmc/build/tmp/deploy/images/raspberrypi4/u-boot.bin' is too large!
DEBUG: Python function do_generate_static finished
tm@tm-VB1:~/Rpi4/openbmc$
它表示与 256MB 情况相同的边距。
我的第四次尝试。我删除了整个 openbmc 目录并执行了上述相同的步骤。我将 MACHINE ??= "raspberrypi4-64" 更改为 "raspberrypi2" 但这一次，我将 FLASH_SIZE 从 32768 更改为 33554432。
之前的结果是一样的。
我的第五次尝试。我删除了整个 openbmc 目录并执行了上述相同的步骤。我使用 MACHINE ??= "raspberrypi2" 但是这一次，我将 FLASH_SIZE 从 32768 更改为 67108864。
之前的结果是一样的。
在我尝试了几种变体之后，它总是说“图像太大”，尽管我将 FLASH_SIZE 更改为更大的一个。所以，我想知道我是否错过了一些重要的配置，或者它需要另一个参数来解决这个问题，除了 FLASH_SIZE。顺便说一句，我尝试了 romulus 并成功了。
我的环境是 ubuntu-20.04.2.0-desktop-amd64。
我真的很感激有人能给我建议来完成这项工作。