{"id":2223743,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2223743/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/patch/20260416055948.130041-3-ilias.apalodimas@linaro.org/","project":{"id":18,"url":"http://patchwork.ozlabs.org/api/1.1/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},"msgid":"<20260416055948.130041-3-ilias.apalodimas@linaro.org>","date":"2026-04-16T05:59:38","name":"[v2,2/6] fdtdec: Introduce fdtdec_setup_mem_ram_top() to determine end of topmost DRAM bank","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"9533719ef82ddcd91d60c2af702ebf8c1276d057","submitter":{"id":74147,"url":"http://patchwork.ozlabs.org/api/1.1/people/74147/?format=json","name":"Ilias Apalodimas","email":"ilias.apalodimas@linaro.org"},"delegate":{"id":3651,"url":"http://patchwork.ozlabs.org/api/1.1/users/3651/?format=json","username":"trini","first_name":"Tom","last_name":"Rini","email":"trini@ti.com"},"mbox":"http://patchwork.ozlabs.org/project/uboot/patch/20260416055948.130041-3-ilias.apalodimas@linaro.org/mbox/","series":[{"id":500079,"url":"http://patchwork.ozlabs.org/api/1.1/series/500079/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/list/?series=500079","date":"2026-04-16T05:59:37","name":"Relocate U-Boot in the last bank","version":2,"mbox":"http://patchwork.ozlabs.org/series/500079/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2223743/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2223743/checks/","tags":{},"headers":{"Return-Path":"","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=p/ZKko6y;\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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This makes use of iterator\nfunction fdtdec_setup_mem_for_each_bank() introduced in previous commit.\n\nReviewed-by: Ilias Apalodimas \nReviewed-by: Simon Glass \nReviewed-by: Anshul Dalal \nSigned-off-by: Ilias Apalodimas \nSigned-off-by: Marek Vasut \n---\n include/fdtdec.h | 16 ++++++++++++++++\n lib/fdtdec.c | 18 ++++++++++++++++++\n 2 files changed, 34 insertions(+)","diff":"diff --git a/include/fdtdec.h b/include/fdtdec.h\nindex 4e09f9d718c5..35caf4b789e8 100644\n--- a/include/fdtdec.h\n+++ b/include/fdtdec.h\n@@ -957,6 +957,22 @@ int fdtdec_setup_mem_size_base(void);\n */\n int fdtdec_setup_mem_size_base_lowest(void);\n \n+/**\n+ * fdtdec_setup_mem_ram_top() - decode and setup gd->ram_top to highest address\n+ * available in any memory bank\n+ *\n+ * Decode the /memory 'reg' property to determine the highest end of the memory\n+ * bank and populate the global data ram_top with it.\n+ *\n+ * This function should be called from a boards board_get_usable_ram_top().\n+ * This helper function allows for boards to query the device tree for topmost\n+ * DRAM address.\n+ *\n+ * Return: 0 if OK, -EINVAL if the /memory node or reg property is missing or\n+ * invalid\n+ */\n+int fdtdec_setup_mem_ram_top(void);\n+\n /**\n * fdtdec_setup_memory_banksize() - decode and populate gd->bd->bi_dram\n *\ndiff --git a/lib/fdtdec.c b/lib/fdtdec.c\nindex 9c35b08e709f..a173c4ab323d 100644\n--- a/lib/fdtdec.c\n+++ b/lib/fdtdec.c\n@@ -1166,6 +1166,24 @@ int fdtdec_setup_mem_size_base_lowest(void)\n \treturn fdtdec_setup_mem_for_each_bank(fdtdec_setup_mem_size_base_lowest_bankfn);\n }\n \n+static void fdtdec_setup_mem_ram_top_bankfn(struct resource *res, int bank)\n+{\n+\tif ((res->end + 1) > gd->ram_top)\n+\t\tgd->ram_top = res->end + 1;\n+}\n+\n+int fdtdec_setup_mem_ram_top(void)\n+{\n+\tphys_addr_t old_top = gd->ram_top;\n+\tint ret;\n+\n+\tret = fdtdec_setup_mem_for_each_bank(fdtdec_setup_mem_ram_top_bankfn);\n+\tif (ret)\n+\t\tgd->ram_top = old_top;\n+\n+\treturn ret;\n+}\n+\n static int uncompress_blob(const void *src, ulong sz_src, void **dstp)\n {\n #if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\\\n","prefixes":["v2","2/6"]}