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<p class="MsoPlainText"><span lang="EN-US">Hi OpenBMC team,<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">I had identified the root cause of the problem reported by dekriea on discord [1].<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">We have a 32MB NOR flash on ast2500 EVB, which means the kernel image will be placed at offset 512 KB by default, but u-boot is trying to load kernel image from the offset 1024 KB due to the incorrect setting in evb-ast2500_defconfig.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">The evb-ast2500_defconfig was ported from Aspeed SDK, so the partition layout is different from OpenBMC 32MB flash layout which is defined in image-type-phosphor.bbclass[2] and openbmc-flash-layout.dtsi[3].<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">So we have three solutions for this issue:<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">1. Revise the CONFIG_BOOTCOMMAND and CONFIG_ENV_OFFSET/SIZE in evb-ast2500_defconfig of u-boot v2019.04.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">2. Add .cfg to override CONFIG_BOOTCOMMAND and CONFIG_ENV_OFFSET/SIZE in machine evb-ast2500.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">3. Add an ast2500_openbmc_defconfig for evb-ast2500 machine which is similar to ast2600[4].<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Which solution is the community preferred?<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Reference:<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">[1] <a href="https://discord.com/channels/775381525260664832/922871693008068638/960822924867145728">
https://discord.com/channels/775381525260664832/922871693008068638/960822924867145728</a><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">[2] <a href="https://github.com/openbmc/openbmc/blob/master/meta-phosphor/classes/image_types_phosphor.bbclass#L40-L52">
https://github.com/openbmc/openbmc/blob/master/meta-phosphor/classes/image_types_phosphor.bbclass#L40-L52</a><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">[3] <a href="https://github.com/openbmc/linux/blob/dev-5.15/arch/arm/boot/dts/openbmc-flash-layout.dtsi">
https://github.com/openbmc/linux/blob/dev-5.15/arch/arm/boot/dts/openbmc-flash-layout.dtsi</a><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">[4] <a href="https://lists.ozlabs.org/pipermail/openbmc/2022-February/029334.html">
https://lists.ozlabs.org/pipermail/openbmc/2022-February/029334.html</a><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">B.R.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Howard<o:p></o:p></span></p>
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