{"id":817157,"url":"http://patchwork.ozlabs.org/api/patches/817157/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/patch/20170921193759.3914-2-semen.protsenko@linaro.org/","project":{"id":18,"url":"http://patchwork.ozlabs.org/api/projects/18/?format=json","name":"U-Boot","link_name":"uboot","list_id":"u-boot.lists.denx.de","list_email":"u-boot@lists.denx.de","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20170921193759.3914-2-semen.protsenko@linaro.org>","list_archive_url":null,"date":"2017-09-21T19:37:56","name":"[U-Boot,1/4] arm: am57xx: Fix Linux boot from eMMC","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"ecadca32c1cb0d3034dfd2c181c371d04c149dc7","submitter":{"id":68333,"url":"http://patchwork.ozlabs.org/api/people/68333/?format=json","name":"Sam Protsenko","email":"semen.protsenko@linaro.org"},"delegate":{"id":3651,"url":"http://patchwork.ozlabs.org/api/users/3651/?format=json","username":"trini","first_name":"Tom","last_name":"Rini","email":"trini@ti.com"},"mbox":"http://patchwork.ozlabs.org/project/uboot/patch/20170921193759.3914-2-semen.protsenko@linaro.org/mbox/","series":[{"id":4473,"url":"http://patchwork.ozlabs.org/api/series/4473/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/list/?series=4473","date":"2017-09-21T19:37:59","name":"arm: am57xx/dra7xx: Improve eMMC Linux boot","version":1,"mbox":"http://patchwork.ozlabs.org/series/4473/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/817157/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/817157/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.denx.de\n\t(client-ip=81.169.180.215; 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charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" "},"content":"Right now on OMAP5-based boards we have only one partition defined for\nLinux boot, which is rootfs. That doesn't work with bootpart=1:2 (that\nis defined in include/environment/ti/boot.h). To fix Linux boot we may\neither:\n\n 1. Change bootpart to be 1:1\n 2. Or add preceding partition, so that rootfs is actually 1:2\n\nSecond choice seems more reasonable, as DFU is already using similar\npartition table and can rely on bootpart to be 1:2.\n\nThis patch adds \"bootloader\" partition. So now eMMC layout for Linux\nboot looks like this:\n\noffset content size partition\n(KiB) (KiB)","diff":"=======================================================================\n\n0 +--------------------------------+\n | MBR/GPT header | 128 -\n128 +--------------------------------+\n | MLO | 256 -\n384 +--------------------------------+\n | u-boot.img | 1792 bootloader\n2176 +--------------------------------+\n | //////////// hole //////////// | 256 -\n2432 +--------------------------------+\n | U-Boot environment | 128 -\n2560 +--------------------------------+\n | U-Boot environment (redundant) | 128 -\n2688 +--------------------------------+\n | rootfs | remaining rootfs\nend +--------------------------------+\n\n=======================================================================\n\nGuard hole appears because U-Boot environment offset was calculated for\nAndroid partition table, which has two additional partitions in place of\nthat hole (\"environment\" and \"misc\" partitions).\n\nThis patch also changes rootfs offset from 2 MiB further to 2688 KiB,\nso that there won't be any collisions with U-Boot environment when we\nflash rootfs.\n\nSigned-off-by: Sam Protsenko \n---\n include/configs/am57xx_evm.h | 3 ++-\n 1 file changed, 2 insertions(+), 1 deletion(-)\n\ndiff --git a/include/configs/am57xx_evm.h b/include/configs/am57xx_evm.h\nindex 0c70c53050..bf555ccdc2 100644\n--- a/include/configs/am57xx_evm.h\n+++ b/include/configs/am57xx_evm.h\n@@ -44,7 +44,8 @@\n #define PARTS_DEFAULT \\\n \t/* Linux partitions */ \\\n \t\"uuid_disk=${uuid_gpt_disk};\" \\\n-\t\"name=rootfs,start=2MiB,size=-,uuid=${uuid_gpt_rootfs}\\0\" \\\n+\t\"name=bootloader,start=384K,size=1792K,uuid=${uuid_gpt_bootloader};\" \\\n+\t\"name=rootfs,start=2688K,size=-,uuid=${uuid_gpt_rootfs}\\0\" \\\n \t/* Android partitions */ \\\n \t\"partitions_android=\" \\\n \t\"uuid_disk=${uuid_gpt_disk};\" \\\n","prefixes":["U-Boot","1/4"]}