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<p class="MsoNormal">During reboot, shutdown scripts check for any images in initramfs and it overwrites to its predefined partition via update scripts.<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">openbmc <openbmc-bounces+vijaykhemka=fb.com@lists.ozlabs.org> on behalf of
</span><span style="font-size:12.0pt;font-family:"MS Gothic";color:black">南野ムルシエラゴ</span><span style="font-size:12.0pt;color:black"> <1181052146@qq.com><br>
<b>Date: </b>Sunday, March 1, 2020 at 11:30 PM<br>
<b>To: </b>openbmc <openbmc@lists.ozlabs.org><br>
<b>Subject: </b>What does openbmc system do after update BMC Firmware and taps reboot?<o:p></o:p></span></p>
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<p class="MsoNormal">Greetings:<br>
<br>
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.<br>
But I still do not know, why in step 7 should I reboot, and what reboot do?<br>
Later I found in "https://github.com/openbmc/docs/blob/master/code-update/code-update-diagrams.md", which tells that:<br>
[*] In a static layout configuration, the images are stored in RAM and the content is written to flash during BMC reboot.
<br>
Reference the update and shutdown scripts provided by <a href="https://github.com/openbmc/openbmc/tree/master/meta-phosphor/recipes-phosphor/initrdscripts">
initrdscripts</a><br>
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?<br>
What happens after I tap "reboot", and who calls the "update" script, and how it calls the "update" scripts?<br>
Can someone tell me? Thanks a lot!<br>
<br>
Best Regards!<br>
Liu Hongwei<br>
<br>
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