{"id":1522,"date":"2015-07-22T20:25:13","date_gmt":"2015-07-22T19:25:13","guid":{"rendered":"http:\/\/rglinuxtech.com\/?p=1522"},"modified":"2015-07-22T20:25:13","modified_gmt":"2015-07-22T19:25:13","slug":"arm64-hikey-change-to-uefi-boot","status":"publish","type":"post","link":"https:\/\/rglinuxtech.com\/?p=1522","title":{"rendered":"ARM64 – HiKey – Change to UEFI Boot.."},"content":{"rendered":"

After some more testing, including trying (unsuccessfully<\/em>) the HiKey version of Kernel 4.1-rc4 # git clone -b hikey-mainline-rebase –single-branch https:\/\/github.com\/96boards\/linux\/<\/strong><\/span>\u00a0\u00a0 <\/strong>I was frustrated by the complete lack of kernel boot info on screen, after the proprietary bootloader had finished.. More research found that this bootloader was described as somewhat deficient in the ‘fit for purpose’ department, and I really ought to update to a more effective<\/em> one…<\/p>\n

There is a pre-release version of U-Boot available, but UEFI\/grub is also now an option, which made more sense..\u00a0\u00a0\u00a0\u00a0 The only drawback to the current version of UEFI is that it can only boot from Emmc, not an SD Card, but as long as the kernel image (Image<\/strong><\/span>) and dtb (hi6220-hikey.dtb<\/strong><\/span>) and initrd are resident on the Emmc boot partition, then the rootfs can still be on the SD Card..\u00a0\u00a0\u00a0\u00a0 I also created a SWAP file on the Emmc root partition..<\/p>\n

[root@rghikey ~]#<\/span> cat \/etc\/fstab<\/span>\r\n\/dev\/mmcblk1p2  \/           ext4  defaults 1 1<\/span><\/strong>\r\n\/dev\/mmcblk1p1  \/boot       vfat  defaults 1 2<\/span><\/strong>\r\n\/dev\/mmcblk0p6  \/boot-emmc  vfat  defaults 1 2<\/span><\/strong>\r\n\/dev\/mmcblk0p9  \/root-emmc  ext4  defaults 1 2<\/span><\/strong>\r\n\/root-emmc\/SWAP none        swap  defaults 0 0<\/span><\/strong><\/pre>\n
So.. I have the root filesystem on the SD Card, and mount the Emmc boot and root partitions as \/boot-emmc<\/strong><\/span> and \/root-emmc<\/span><\/strong> respectively, and then copy the Image and .dtb files to the \/boot-emmc partition after compilation..\u00a0\u00a0\u00a0\u00a0 This is far more useful, as by editing the grub configuration file in the Emmc boot directory (\/boot-emmc\/grub\/grub.cfg<\/span><\/strong>) I can arrange for multiple Kernel versions to be available for booting, to fall-back to a known\/good version if the boot fails..<\/p>\n
$ <\/strong>cat \/boot-emmc\/grub\/grub.cfg <\/span>\r\nset default=\"0\" <\/strong><\/span>\r\nset timeout=10 <\/strong><\/span>\r\n \r\nmenuentry 'Fedora Linux' { <\/strong><\/span>\r\n \u00a0\u00a0\u00a0linux \/Image console=ttyAMA0,115200n8 earlycon=pl011,0xf8015000 root=\/dev\/mmcblk1p2 rw roo<\/strong><\/span>\r\ntwait initrd=initrd.img efi=noruntime <\/strong><\/span>\r\n \u00a0\u00a0\u00a0initrd \/initrd.img <\/strong><\/span>\r\n \u00a0\u00a0\u00a0devicetree \/hi6220-hikey.dtb <\/strong><\/span>\r\n} <\/strong><\/span>\r\n \r\nmenuentry 'Fedora Linux OLD' { <\/strong><\/span>\r\n \u00a0\u00a0\u00a0linux \/Image.old console=ttyAMA0,115200n8 earlycon=pl011,0xf8015000 root=\/dev\/mmcblk1p2 rw<\/strong><\/span>\r\n rootwait initrd=initrd.img efi=noruntime <\/strong><\/span>\r\n \u00a0\u00a0\u00a0initrd \/initrd.img <\/strong><\/span>\r\n \u00a0\u00a0\u00a0devicetree \/hi6220-hikey.dtb.old <\/strong><\/span>\r\n} <\/strong><\/span>\r\n \r\nmenuentry 'Fedora Linux 4.1-rc4' { <\/strong><\/span>\r\n \u00a0\u00a0\u00a0linux \/Image-41rc4 console=ttyAMA0,115200n8 earlycon=pl011,0xf8015000 root=\/dev\/mmcblk1p2 <\/strong><\/span>\r\nrw rootwait initrd=initrd.img efi=noruntime <\/strong><\/span>\r\n \u00a0\u00a0\u00a0initrd \/initrd.img <\/strong><\/span>\r\n \u00a0\u00a0\u00a0devicetree \/hi6220-hikey.dtb-41rc4 <\/strong><\/span>\r\n}<\/strong><\/pre>\n
Apart from the multi-version boot convenience, the resulting console output gives far more early-kernel-boot info than the old bootloader, enabling proper diagnosis of boot failures, rather than an empty screen.<\/div>\n
<\/div>\n
Caveats..<\/em>\u00a0\u00a0\u00a0 You may need to try different versions of the UEFI binaries, as I found that the July 19 version failed, but an earlier version worked OK..\u00a0\u00a0\u00a0 You will also need to connect\u00a0 a proper uart\/usb console to the circuit board, which may involve some careful soldering.. (see previous article https:\/\/rglinuxtech.com\/?p=1509<\/a>)<\/div>\n
<\/div>\n
More to come – including the USB port catch-22, and Bluetooth woes..!<\/div>\n
<\/div>\n
Robert Gadsdon.\u00a0\u00a0\u00a0 July 22, 2015.<\/em><\/div>\n","protected":false},"excerpt":{"rendered":"
After some more testing, including trying (unsuccessfully) the HiKey version of Kernel 4.1-rc4 # git clone -b hikey-mainline-rebase –single-branch https:\/\/github.com\/96boards\/linux\/\u00a0\u00a0 I was frustrated by the complete lack of kernel boot info on screen, after the proprietary bootloader had finished.. More research found that this bootloader was described as somewhat deficient in the ‘fit for purpose’ department, and …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1132,1131,5,6,1146,16,1160],"tags":[1133,1161,1163,1164,1147,242,1175,1162],"class_list":["post-1522","post","type-post","status-publish","format-standard","hentry","category-aarch64","category-arm64","category-compilation","category-crash-and-burn","category-hikey","category-linux-arm","category-uefi","tag-arm64","tag-bootloader","tag-emmc","tag-grub","tag-hikey","tag-linux","tag-success","tag-uefi"],"_links":{"self":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts\/1522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1522"}],"version-history":[{"count":4,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts\/1522\/revisions"}],"predecessor-version":[{"id":1526,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts\/1522\/revisions\/1526"}],"wp:attachment":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}