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GET /api/1.0/patches/2221239/?format=api
{ "id": 2221239, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2221239/?format=api", "project": { "id": 18, "url": "http://patchwork.ozlabs.org/api/1.0/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 }, "msgid": "<20260408220928.3328551-3-daniel@thingy.jp>", "date": "2026-04-08T22:09:25", "name": "[v3,2/5] m68k: Fix writew(), writel(), readw(), readl() endianness for classic m68k", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "5117c14e91c3aea0f794a1c0247b339c70afc45d", "submitter": { "id": 85408, "url": "http://patchwork.ozlabs.org/api/1.0/people/85408/?format=api", "name": "Daniel Palmer", "email": "daniel@thingy.jp" }, "delegate": { "id": 14103, "url": "http://patchwork.ozlabs.org/api/1.0/users/14103/?format=api", "username": "spectrum", "first_name": "Angelo", "last_name": "Dureghello", "email": "sysamfw@gmail.com" }, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/20260408220928.3328551-3-daniel@thingy.jp/mbox/", "series": [ { "id": 499218, "url": "http://patchwork.ozlabs.org/api/1.0/series/499218/?format=api", "date": "2026-04-08T22:09:23", "name": "Add virtio-mmio support to m68k virt machine", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/499218/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2221239/checks/", "tags": {}, "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 (1024-bit key;\n unprotected) header.d=thingy.jp header.i=@thingy.jp header.a=rsa-sha256\n header.s=google header.b=XGU6WXUM;\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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a=rsa-sha256; c=relaxed/relaxed;\n d=thingy.jp; s=google; t=1775686194; x=1776290994; darn=lists.denx.de;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:from:to:cc:subject:date\n :message-id:reply-to;\n bh=h50cw41BtUAEcCIxmSMdICAf/4B9jb1hBvtV0/DAO68=;\n b=XGU6WXUMTDyZA+LRQlpKDPyGed4cEdMBcDll8pt/lLZgHWa2Apj1vSrwlVzhUJSZ3y\n oeG8pHdTr/CELQI6DO8Q+ZUcYuowzN5qD2Ij3cbh084sYSHlRcbX6QSj5P0UgEbbK8Vr\n GAEme46uBeJgvUPL36a74w7a4qKnCBeIdmO2M=", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20251104; t=1775686194; x=1776290994;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from\n :to:cc:subject:date:message-id:reply-to;\n bh=h50cw41BtUAEcCIxmSMdICAf/4B9jb1hBvtV0/DAO68=;\n b=Wmox+PtpAS3YQkJR9adRUyujgr/bPGuwFy2AFLrT1rFOTLvmgHuf2u9AX41l+WNS32\n WD4dOi0191d1fd4xH4quqqBstvHP4+leQqmaF2ns7RYQ/mRXglKHkDrdFz6zFefKmxIT\n 0OLUmUXTZSd3g0T3YzMCNOIFnTsEkvzGaW/be18YSdgjJyZ4czn3KodEDxy2kDg6VhCq\n L+yZv1WXjPqfBFPawhrptpMNyRtp4sX0Ipm1SrLdRkNrzhqMR2tUEq+8nE+RiDFJmZYA\n bbh2E9A5rP42RoOG4TCWXMVfHThUu0wxrZTvJ/j5uLa4HpLLMChby2fbg2Fza/+I/jFc\n mErQ==", "X-Gm-Message-State": "AOJu0YyyOoZhrRd0uI+N7HKqJIt9PHsBU1Lv6t0n57Wh1XEtuQthVqHJ\n 97haKEUzmfdJDK73veezPAtuoLoudbHejPuSN3V7E8087kIluqbQNh2Pelyv9y4Jhvg=", "X-Gm-Gg": "AeBDievnBx8pYjiUPZR0xmR/SLs39iNF3uJ43VgOjqnRCCazx0GX9txoDgHQAYKSmZF\n Jsn0qTTb5uxiSWUEx8+4knrcDwPGgEp2Lx9mK6lNdtyx21a/fwgwiLpOKSwExvX530DTKf+QuU0\n 56BUzFNz89GA6SDORmRWpCYU31hCEDc0MEZYXSuf5zwn+viOUNN9rWeqn5C/roXPSEdOvam7HMn\n mqGUlu/La7/Zu1Em9CW9Q9D8bKJ+2qJsvUnDp+kIyzuIRWSSksE1MJCIT473WZzvOGHQ4h1F4/W\n +C8GUvY1YCJ7yS7KFQjQ9mNWSMW7Yw6MiAwrR7RL8X9WFy/FJRYebXHJV4a6K01AlYmflPV2D4d\n 5BP0lIGhPx12FbSTIocukHXemcJ86mffzYorlSScVOvYv5mjEpoWmj5Xgrp3HZdXHAKHnPDlL2I\n gW4J866wMoHxvi", "X-Received": "by 2002:a05:6a00:1ac9:b0:81e:b2ba:5b3a with SMTP id\n d2e1a72fcca58-82d0da464cemr20602395b3a.8.1775686194218;\n Wed, 08 Apr 2026 15:09:54 -0700 (PDT)", "From": "Daniel Palmer <daniel@thingy.jp>", "To": "visitorckw@gmail.com,\n\tangelo@kernel-space.org,\n\tbmeng.cn@gmail.com", "Cc": "u-boot@lists.denx.de,\n\tDaniel Palmer <daniel@thingy.jp>", "Subject": "[PATCH v3 2/5] m68k: Fix writew(), writel(), readw(),\n readl() endianness for classic m68k", "Date": "Thu, 9 Apr 2026 07:09:25 +0900", "Message-ID": "<20260408220928.3328551-3-daniel@thingy.jp>", "X-Mailer": "git-send-email 2.51.0", "In-Reply-To": "<20260408220928.3328551-1-daniel@thingy.jp>", "References": "<20260408220928.3328551-1-daniel@thingy.jp>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-BeenThere": "u-boot@lists.denx.de", "X-Mailman-Version": "2.1.39", "Precedence": "list", "List-Id": "U-Boot discussion <u-boot.lists.denx.de>", "List-Unsubscribe": "<https://lists.denx.de/options/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=unsubscribe>", "List-Archive": "<https://lists.denx.de/pipermail/u-boot/>", "List-Post": "<mailto:u-boot@lists.denx.de>", "List-Help": "<mailto:u-boot-request@lists.denx.de?subject=help>", "List-Subscribe": "<https://lists.denx.de/listinfo/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=subscribe>", "Errors-To": "u-boot-bounces@lists.denx.de", "Sender": "\"U-Boot\" <u-boot-bounces@lists.denx.de>", "X-Virus-Scanned": "clamav-milter 0.103.8 at phobos.denx.de", "X-Virus-Status": "Clean" }, "content": "In Linux these are meant to read a little-endian value and swap\nto the CPU endian.\n\nIn u-boot for m68k this is currently broken and prevents\nvirtio-mmio from functioning.\n\nThis change is only for classic m68k. Coldfire has read big-endian,\nno swap for these in u-boot and Linux and existing drivers probably\ndepend on this.\n\nSigned-off-by: Daniel Palmer <daniel@thingy.jp>\n---\n arch/m68k/include/asm/io.h | 31 ++++++++++++++++++++-----------\n 1 file changed, 20 insertions(+), 11 deletions(-)", "diff": "diff --git a/arch/m68k/include/asm/io.h b/arch/m68k/include/asm/io.h\nindex 35ad4a1c0444..2577081d8363 100644\n--- a/arch/m68k/include/asm/io.h\n+++ b/arch/m68k/include/asm/io.h\n@@ -23,18 +23,27 @@\n #define __raw_writew(w,addr) ((*(volatile u16 *) (addr)) = (w))\n #define __raw_writel(l,addr) ((*(volatile u32 *) (addr)) = (l))\n \n-#define readb(addr)\t\tin_8((volatile u8 *)(addr))\n-#define writeb(b,addr)\t\tout_8((volatile u8 *)(addr), (b))\n-#if !defined(__BIG_ENDIAN)\n-#define readw(addr)\t\t(*(volatile u16 *) (addr))\n-#define readl(addr)\t\t(*(volatile u32 *) (addr))\n-#define writew(b,addr)\t\t((*(volatile u16 *) (addr)) = (b))\n-#define writel(b,addr)\t\t((*(volatile u32 *) (addr)) = (b))\n+#define readb(addr)\tin_8((volatile u8 *)(addr))\n+#define writeb(b, addr)\tout_8((volatile u8 *)(addr), (b))\n+#ifdef CONFIG_M680x0\n+/*\n+ * For classic m68k these work the same way as Linux:\n+ * Read a little endian value, swap to the CPU endian.\n+ */\n+#define readw(addr)\tin_le16((volatile u16 *)(addr))\n+#define readl(addr)\tin_le32((volatile u32 *)(addr))\n+#define writew(b, addr)\tout_le16((volatile u16 *)(addr), (b))\n+#define writel(b, addr)\tout_le32((volatile u32 *)(addr), (b))\n #else\n-#define readw(addr)\t\tin_be16((volatile u16 *)(addr))\n-#define readl(addr)\t\tin_be32((volatile u32 *)(addr))\n-#define writew(b,addr)\t\tout_be16((volatile u16 *)(addr),(b))\n-#define writel(b,addr)\t\tout_be32((volatile u32 *)(addr),(b))\n+/*\n+ * For coldfire these read a big endian value and use it\n+ * as-is. This means that for little endian devices on the\n+ * bus like PCI device these won't work as expected currently.\n+ */\n+#define readw(addr)\tin_be16((volatile u16 *)(addr))\n+#define readl(addr)\tin_be32((volatile u32 *)(addr))\n+#define writew(b, addr)\tout_be16((volatile u16 *)(addr), (b))\n+#define writel(b, addr)\tout_be32((volatile u32 *)(addr), (b))\n #endif\n \n /*\n", "prefixes": [ "v3", "2/5" ] }