[{"id":3669572,"web_url":"http://patchwork.ozlabs.org/comment/3669572/","msgid":"","list_archive_url":null,"date":"2026-03-26T09:35:59","subject":"Re: [RFC][PATCH 1/3] fdtdec: Deduplicate iterator function","submitter":{"id":74147,"url":"http://patchwork.ozlabs.org/api/people/74147/","name":"Ilias Apalodimas","email":"ilias.apalodimas@linaro.org"},"content":"On Wed, 25 Mar 2026 at 05:17, Marek Vasut\n wrote:\n>\n> Both fdtdec_setup_memory_banksize() and fdtdec_setup_mem_size_base_lowest()\n> implement the exact same iterator over all memory banks, the only difference\n> is the body that is executed for each bank. Deduplicate the functionality\n> into iterator function fdtdec_setup_mem_for_each_bank(), which takes a\n> function pointer to a function which implements the body as a parameter.\n> No functional change.\n>\n> Signed-off-by: Marek Vasut \n\nReviewed-by: Ilias Apalodimas \n\n> ---\n> Cc: Casey Connolly \n> Cc: Ilias Apalodimas \n> Cc: Nobuhiro Iwamatsu \n> Cc: Raymond Mao \n> Cc: Simon Glass \n> Cc: Tom Rini \n> Cc: u-boot@lists.denx.de\n> ---\n> lib/fdtdec.c | 77 ++++++++++++++++++++--------------------------------\n> 1 file changed, 30 insertions(+), 47 deletions(-)\n>\n> diff --git a/lib/fdtdec.c b/lib/fdtdec.c\n> index c38738b48c7..d820f75b031 100644\n> --- a/lib/fdtdec.c\n> +++ b/lib/fdtdec.c\n> @@ -1092,7 +1092,7 @@ ofnode get_next_memory_node(ofnode mem)\n> return mem;\n> }\n>\n> -int fdtdec_setup_memory_banksize(void)\n> +static int fdtdec_setup_mem_for_each_bank(void (*bankfn)(struct resource *res, int bank))\n> {\n> int bank, ret, reg = 0;\n> struct resource res;\n> @@ -1120,63 +1120,46 @@ int fdtdec_setup_memory_banksize(void)\n> if (ret != 0)\n> return -EINVAL;\n>\n> - gd->bd->bi_dram[bank].start = (phys_addr_t)res.start;\n> - gd->bd->bi_dram[bank].size =\n> - (phys_size_t)(res.end - res.start + 1);\n> -\n> - debug(\"%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\\n\",\n> - __func__, bank,\n> - (unsigned long long)gd->bd->bi_dram[bank].start,\n> - (unsigned long long)gd->bd->bi_dram[bank].size);\n> + bankfn(&res, bank);\n> }\n>\n> return 0;\n> }\n>\n> -int fdtdec_setup_mem_size_base_lowest(void)\n> +static void fdtdec_setup_memory_banksize_bankfn(struct resource *res, int bank)\n> {\n> - int bank, ret, reg = 0;\n> - struct resource res;\n> - unsigned long base;\n> - phys_size_t size;\n> - ofnode mem = ofnode_null();\n> + gd->bd->bi_dram[bank].start = (phys_addr_t)res->start;\n> + gd->bd->bi_dram[bank].size = (phys_size_t)(res->end - res->start + 1);\n>\n> - gd->ram_base = (unsigned long)~0;\n> -\n> - mem = get_next_memory_node(mem);\n> - if (!ofnode_valid(mem)) {\n> - debug(\"%s: Missing /memory node\\n\", __func__);\n> - return -EINVAL;\n> - }\n> -\n> - for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {\n> - ret = ofnode_read_resource(mem, reg++, &res);\n> - if (ret < 0) {\n> - reg = 0;\n> - mem = get_next_memory_node(mem);\n> - if (!ofnode_valid(mem))\n> - break;\n> -\n> - ret = ofnode_read_resource(mem, reg++, &res);\n> - if (ret < 0)\n> - break;\n> - }\n> -\n> - if (ret != 0)\n> - return -EINVAL;\n> + debug(\"%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\\n\",\n> + __func__, bank,\n> + (unsigned long long)gd->bd->bi_dram[bank].start,\n> + (unsigned long long)gd->bd->bi_dram[bank].size);\n> +}\n>\n> - base = (unsigned long)res.start;\n> - size = (phys_size_t)(res.end - res.start + 1);\n> +int fdtdec_setup_memory_banksize(void)\n> +{\n> + return fdtdec_setup_mem_for_each_bank(fdtdec_setup_memory_banksize_bankfn);\n> +}\n>\n> - if (gd->ram_base > base && size) {\n> - gd->ram_base = base;\n> - gd->ram_size = size;\n> - debug(\"%s: Initial DRAM base %lx size %lx\\n\",\n> - __func__, base, (unsigned long)size);\n> - }\n> +static void fdtdec_setup_mem_size_base_lowest_bankfn(struct resource *res, int bank)\n> +{\n> + unsigned long base = (unsigned long)res->start;\n> + phys_size_t size = (phys_size_t)(res->end - res->start + 1);\n> +\n> + if (gd->ram_base > base && size) {\n> + gd->ram_base = base;\n> + gd->ram_size = size;\n> + debug(\"%s: Initial DRAM base %lx size %lx\\n\",\n> + __func__, base, (unsigned long)size);\n> }\n> +}\n>\n> - return 0;\n> +int fdtdec_setup_mem_size_base_lowest(void)\n> +{\n> + gd->ram_base = (unsigned long)~0;\n> +\n> + return fdtdec_setup_mem_for_each_bank(fdtdec_setup_mem_size_base_lowest_bankfn);\n> }\n>\n> static int uncompress_blob(const void *src, ulong sz_src, void **dstp)\n> --\n> 2.53.0\n>","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=Pxeb43/R;\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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Thu, 26 Mar 2026\n 02:36:36 -0700 (PDT)","MIME-Version":"1.0","References":"<20260325031743.371728-1-marek.vasut+renesas@mailbox.org>","In-Reply-To":"<20260325031743.371728-1-marek.vasut+renesas@mailbox.org>","From":"Ilias Apalodimas ","Date":"Thu, 26 Mar 2026 11:35:59 +0200","X-Gm-Features":"AaiRm50JWAvwaE7c9lTac9EsncRQHPCxTIJPkl2vaJrKg7G_1FdgGP4vohIEb7M","Message-ID":"\n ","Subject":"Re: [RFC][PATCH 1/3] fdtdec: Deduplicate iterator function","To":"Marek Vasut ","Cc":"u-boot@lists.denx.de, Casey Connolly ,\n Nobuhiro Iwamatsu ,\n Raymond Mao ,\n Simon Glass , Tom Rini ","Content-Type":"text/plain; charset=\"UTF-8\"","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"}},{"id":3669778,"web_url":"http://patchwork.ozlabs.org/comment/3669778/","msgid":"<61e458bd-3b1a-4b7b-bb03-797c7ac8dc27@linaro.org>","list_archive_url":null,"date":"2026-03-26T15:08:56","subject":"Re: [RFC][PATCH 1/3] fdtdec: Deduplicate iterator function","submitter":{"id":90679,"url":"http://patchwork.ozlabs.org/api/people/90679/","name":"Casey Connolly","email":"casey.connolly@linaro.org"},"content":"On 25/03/2026 04:17, Marek Vasut wrote:\n> Both fdtdec_setup_memory_banksize() and fdtdec_setup_mem_size_base_lowest()\n> implement the exact same iterator over all memory banks, the only difference\n> is the body that is executed for each bank. Deduplicate the functionality\n> into iterator function fdtdec_setup_mem_for_each_bank(), which takes a\n> function pointer to a function which implements the body as a parameter.\n> No functional change.\n\nThis is a nice optimisation! It will be good to de-dup some thing in\nmach-snapdragon too with this.\n\nReviewed-by: Casey Connolly \n\nKind regards,>\n> Signed-off-by: Marek Vasut \n> ---\n> Cc: Casey Connolly \n> Cc: Ilias Apalodimas \n> Cc: Nobuhiro Iwamatsu \n> Cc: Raymond Mao \n> Cc: Simon Glass \n> Cc: Tom Rini \n> Cc: u-boot@lists.denx.de\n> ---\n> lib/fdtdec.c | 77 ++++++++++++++++++++--------------------------------\n> 1 file changed, 30 insertions(+), 47 deletions(-)\n> \n> diff --git a/lib/fdtdec.c b/lib/fdtdec.c\n> index c38738b48c7..d820f75b031 100644\n> --- a/lib/fdtdec.c\n> +++ b/lib/fdtdec.c\n> @@ -1092,7 +1092,7 @@ ofnode get_next_memory_node(ofnode mem)\n> \treturn mem;\n> }\n> \n> -int fdtdec_setup_memory_banksize(void)\n> +static int fdtdec_setup_mem_for_each_bank(void (*bankfn)(struct resource *res, int bank))\n> {\n> \tint bank, ret, reg = 0;\n> \tstruct resource res;\n> @@ -1120,63 +1120,46 @@ int fdtdec_setup_memory_banksize(void)\n> \t\tif (ret != 0)\n> \t\t\treturn -EINVAL;\n> \n> -\t\tgd->bd->bi_dram[bank].start = (phys_addr_t)res.start;\n> -\t\tgd->bd->bi_dram[bank].size =\n> -\t\t\t(phys_size_t)(res.end - res.start + 1);\n> -\n> -\t\tdebug(\"%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\\n\",\n> -\t\t __func__, bank,\n> -\t\t (unsigned long long)gd->bd->bi_dram[bank].start,\n> -\t\t (unsigned long long)gd->bd->bi_dram[bank].size);\n> +\t\tbankfn(&res, bank);\n> \t}\n> \n> \treturn 0;\n> }\n> \n> -int fdtdec_setup_mem_size_base_lowest(void)\n> +static void fdtdec_setup_memory_banksize_bankfn(struct resource *res, int bank)\n> {\n> -\tint bank, ret, reg = 0;\n> -\tstruct resource res;\n> -\tunsigned long base;\n> -\tphys_size_t size;\n> -\tofnode mem = ofnode_null();\n> +\tgd->bd->bi_dram[bank].start = (phys_addr_t)res->start;\n> +\tgd->bd->bi_dram[bank].size = (phys_size_t)(res->end - res->start + 1);\n> \n> -\tgd->ram_base = (unsigned long)~0;\n> -\n> -\tmem = get_next_memory_node(mem);\n> -\tif (!ofnode_valid(mem)) {\n> -\t\tdebug(\"%s: Missing /memory node\\n\", __func__);\n> -\t\treturn -EINVAL;\n> -\t}\n> -\n> -\tfor (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {\n> -\t\tret = ofnode_read_resource(mem, reg++, &res);\n> -\t\tif (ret < 0) {\n> -\t\t\treg = 0;\n> -\t\t\tmem = get_next_memory_node(mem);\n> -\t\t\tif (!ofnode_valid(mem))\n> -\t\t\t\tbreak;\n> -\n> -\t\t\tret = ofnode_read_resource(mem, reg++, &res);\n> -\t\t\tif (ret < 0)\n> -\t\t\t\tbreak;\n> -\t\t}\n> -\n> -\t\tif (ret != 0)\n> -\t\t\treturn -EINVAL;\n> +\tdebug(\"%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\\n\",\n> +\t __func__, bank,\n> +\t (unsigned long long)gd->bd->bi_dram[bank].start,\n> +\t (unsigned long long)gd->bd->bi_dram[bank].size);\n> +}\n> \n> -\t\tbase = (unsigned long)res.start;\n> -\t\tsize = (phys_size_t)(res.end - res.start + 1);\n> +int fdtdec_setup_memory_banksize(void)\n> +{\n> +\treturn fdtdec_setup_mem_for_each_bank(fdtdec_setup_memory_banksize_bankfn);\n> +}\n> \n> -\t\tif (gd->ram_base > base && size) {\n> -\t\t\tgd->ram_base = base;\n> -\t\t\tgd->ram_size = size;\n> -\t\t\tdebug(\"%s: Initial DRAM base %lx size %lx\\n\",\n> -\t\t\t __func__, base, (unsigned long)size);\n> -\t\t}\n> +static void fdtdec_setup_mem_size_base_lowest_bankfn(struct resource *res, int bank)\n> +{\n> +\tunsigned long base = (unsigned long)res->start;\n> +\tphys_size_t size = (phys_size_t)(res->end - res->start + 1);\n> +\n> +\tif (gd->ram_base > base && size) {\n> +\t\tgd->ram_base = base;\n> +\t\tgd->ram_size = size;\n> +\t\tdebug(\"%s: Initial DRAM base %lx size %lx\\n\",\n> +\t\t __func__, base, (unsigned long)size);\n> \t}\n> +}\n> \n> -\treturn 0;\n> +int fdtdec_setup_mem_size_base_lowest(void)\n> +{\n> +\tgd->ram_base = (unsigned long)~0;\n> +\n> +\treturn fdtdec_setup_mem_for_each_bank(fdtdec_setup_mem_size_base_lowest_bankfn);\n> }\n> \n> static int uncompress_blob(const void *src, ulong sz_src, void **dstp)","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=mOe6oVsl;\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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