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From: =?gb18030?B?xM/SsKXgpeult6WopemltA==?= <1181052146@qq.com>
To: =?gb18030?B?b3BlbmJtYw==?= <openbmc@lists.ozlabs.org>
Subject: What does openbmc system do after update BMC Firmware and taps reboot?
Date: Mon, 2 Mar 2020 15:24:44 +0800	[thread overview]
Message-ID: <tencent_50CE0F4E75A8AC62FF7879B0299213180707@qq.com> (raw)

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Greetings:

I am learning how openbmc update BMC firmware. I am following the guide "https://github.com/openbmc/docs/blob/master/code-update/code-update.md" to update BMC Firmware. It works well for me.
But I still do not know, why in step 7 should I reboot, and what reboot do?
Later I found in "https://github.com/openbmc/docs/blob/master/code-update/code-update-diagrams.md", which tells that:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [*] In a static layout configuration, the images are stored in RAM and the content is written to flash during BMC reboot. 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Reference the update and shutdown scripts provided by initrdscripts
I am using a static layout. And I found two scripts named "shutdown" and "update" in "/run/initramfs/". So I thought it is that, the update applications put the firmware image in /run/initramfs/ and when I tap reboot, by some means the "update" script runs and the "update" script using "flashcp" command to write the firmware image to the /dev/mtd. Is that right?
What happens after I tap "reboot", and who calls the "update" script, and how it calls the "update" scripts?
Can someone tell me? Thanks a lot!

Best Regards!
Liu Hongwei

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             reply	other threads:[~2020-03-02  7:26 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-02  7:24 =?gb18030?B?xM/SsKXgpeult6WopemltA==?= [this message]
2020-03-02 20:41 ` What does openbmc system do after update BMC Firmware and taps reboot? Vijay Khemka
2020-03-03  1:34 ` Milton Miller II
2020-03-04 13:50   ` =?gb18030?B?u9i4tKO6ICBXaGF0IGRvZXMgb3BlbmJtYyBzeXN0ZW0gZG8gYWZ0ZXIgdXBkYXRlIEJNQyBGaXJtd2FyZSBhbmQgdGFwcyByZWJvb3Q/?= =?gb18030?B?xM/SsKXgpeult6WopemltA==?=

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