From patchwork Wed Sep 13 09:23:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshinori Sato X-Patchwork-Id: 13382639 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 283A9CA551C for ; Wed, 13 Sep 2023 09:24:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239327AbjIMJYM (ORCPT ); Wed, 13 Sep 2023 05:24:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43960 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239166AbjIMJYJ (ORCPT ); Wed, 13 Sep 2023 05:24:09 -0400 Received: from hsmtpd-def.xspmail.jp (hsmtpd-def.xspmail.jp [202.238.198.241]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BBF751999 for ; Wed, 13 Sep 2023 02:24:05 -0700 (PDT) X-Country-Code: JP Received: from sakura.ysato.name (ik1-413-38519.vs.sakura.ne.jp [153.127.30.23]) by hsmtpd-out-0.asahinet.cluster.xspmail.jp (Halon) with ESMTPA id 55942fa6-d31c-4566-a0a9-8e2f1bf2e354; Wed, 13 Sep 2023 18:24:03 +0900 (JST) Received: from SIOS1075.ysato.name (al128006.dynamic.ppp.asahi-net.or.jp [111.234.128.6]) by sakura.ysato.name (Postfix) with ESMTPSA id 0ED9B1C005D; Wed, 13 Sep 2023 18:24:02 +0900 (JST) From: Yoshinori Sato To: linux-sh@vger.kernel.org Cc: Yoshinori Sato , glaubitz@physik.fu-berlin.de Subject: [RFC PATCH v2 01/30] arch/sh: head_32.S passing FDT address to initialize function. Date: Wed, 13 Sep 2023 18:23:26 +0900 Message-Id: <8004923e733fcc4adb930c7dfb6b0ca3fff42177.1694596125.git.ysato@users.sourceforge.jp> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org R4 is caller saved in SH ABI. Save it so it doesn't get corrupted until it's needed for initialization. Signed-off-by: Yoshinori Sato Reviewed-by: Geert Uytterhoeven --- arch/sh/boot/compressed/head_32.S | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/sh/boot/compressed/head_32.S b/arch/sh/boot/compressed/head_32.S index 7bb168133dbb..c5227ef636c3 100644 --- a/arch/sh/boot/compressed/head_32.S +++ b/arch/sh/boot/compressed/head_32.S @@ -15,7 +15,8 @@ startup: /* Load initial status register */ mov.l init_sr, r1 ldc r1, sr - + /* Save FDT address */ + mov r4, r13 /* Move myself to proper location if necessary */ mova 1f, r0 mov.l 1f, r2 @@ -84,7 +85,7 @@ l1: /* Jump to the start of the decompressed kernel */ mov.l kernel_start_addr, r0 jmp @r0 - nop + mov r13,r4 .align 2 bss_start_addr: