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GET /api/patches/2217990/?format=api
{ "id": 2217990, "url": "http://patchwork.ozlabs.org/api/patches/2217990/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/20260331080117.2370092-5-ilias.apalodimas@linaro.org/", "project": { "id": 18, "url": "http://patchwork.ozlabs.org/api/projects/18/?format=api", "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": "<20260331080117.2370092-5-ilias.apalodimas@linaro.org>", "list_archive_url": null, "date": "2026-03-31T08:01:14", "name": "[v2,4/4] common: Allow relocations on the top of the last bank", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "5d1220a0d1bf265586fefe52484ddc565e6c35c9", "submitter": { "id": 74147, "url": "http://patchwork.ozlabs.org/api/people/74147/?format=api", "name": "Ilias Apalodimas", "email": "ilias.apalodimas@linaro.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/20260331080117.2370092-5-ilias.apalodimas@linaro.org/mbox/", "series": [ { "id": 498138, "url": "http://patchwork.ozlabs.org/api/series/498138/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=498138", "date": "2026-03-31T08:01:10", "name": "Relocate U-Boot in the last bank", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/498138/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2217990/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2217990/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<u-boot-bounces@lists.denx.de>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=bhKuy+hx;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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E.g This will break platforms, if the ethernet\ncontroller cannot DMA above 4 GiB, and once U-Boot does\nget relocated above 4 GiB, the packet buffer which is built\ninto the U-Boot binary is also relocated above 4 GiB.\n\nAdd a Kconfig option and allow the common code to relocate U-Boot\nto the top of the last discovered bank.\n\nSigned-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>\n---\n Kconfig | 7 +++++++\n common/board_f.c | 15 +++++++++++++++\n 2 files changed, 22 insertions(+)", "diff": "diff --git a/Kconfig b/Kconfig\nindex ce25ea24a60f..3ebdee1b2794 100644\n--- a/Kconfig\n+++ b/Kconfig\n@@ -474,6 +474,13 @@ config SKIP_RELOCATE\n \t Skips relocation of U-Boot allowing for systems that have extremely\n \t limited RAM to run U-Boot.\n \n+config RELOCATE_LAST_BANK\n+\tbool \"Relocate to the topmost memory address\"\n+\thelp\n+\t When U-Boot relocates, it chooses the end of the first memory bank.\n+\t Enable this if you have multiple banks and want U-Boot to relocate\n+\t to the topmost memory address\n+\n endif # EXPERT\n \n config PHYS_64BIT\ndiff --git a/common/board_f.c b/common/board_f.c\nindex df2b0dc899bf..4270f368e653 100644\n--- a/common/board_f.c\n+++ b/common/board_f.c\n@@ -309,6 +309,8 @@ __weak int mach_cpu_init(void)\n /* Get the top of usable RAM */\n __weak phys_addr_t board_get_usable_ram_top(phys_size_t total_size)\n {\n+\tint ret;\n+\n #if defined(CFG_SYS_SDRAM_BASE) && CFG_SYS_SDRAM_BASE > 0\n \t/*\n \t * Detect whether we have so much RAM that it goes past the end of our\n@@ -321,6 +323,19 @@ __weak phys_addr_t board_get_usable_ram_top(phys_size_t total_size)\n \t\t */\n \t\treturn 0;\n #endif\n+\tif (IS_ENABLED(CONFIG_RELOCATE_LAST_BANK)) {\n+\t\tphys_addr_t old_top = gd->ram_top;\n+\n+\t\tret = fdtdec_setup_mem_ram_top();\n+\t\tif (ret)\n+\t\t\tdebug(\"failed to relocate to ram top\");\n+\t\tret = fdtdec_setup_ram_size();\n+\t\tif (ret) {\n+\t\t\tdebug(\"failed to calculate RAM size\");\n+\t\t\tgd->ram_top = old_top;\n+\t\t}\n+\t}\n+\n \treturn gd->ram_top;\n }\n \n", "prefixes": [ "v2", "4/4" ] }