From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B8D1FC43215 for ; Tue, 26 Nov 2019 12:36:30 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7EEAC20722 for ; Tue, 26 Nov 2019 12:36:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=c-s.fr header.i=@c-s.fr header.b="e0WOCwbd" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7EEAC20722 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id CAAFD6B02F7; Tue, 26 Nov 2019 07:36:16 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C5F396B02F8; Tue, 26 Nov 2019 07:36:16 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AFEFE6B02F9; Tue, 26 Nov 2019 07:36:16 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0206.hostedemail.com [216.40.44.206]) by kanga.kvack.org (Postfix) with ESMTP id 8948B6B02F7 for ; Tue, 26 Nov 2019 07:36:16 -0500 (EST) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id 46C13181AEF07 for ; Tue, 26 Nov 2019 12:36:16 +0000 (UTC) X-FDA: 76198376352.28.desk82_70df85a31304f X-HE-Tag: desk82_70df85a31304f X-Filterd-Recvd-Size: 5415 Received: from pegase1.c-s.fr (pegase1.c-s.fr [93.17.236.30]) by imf01.hostedemail.com (Postfix) with ESMTP for ; Tue, 26 Nov 2019 12:36:15 +0000 (UTC) Received: from localhost (mailhub1-ext [192.168.12.233]) by localhost (Postfix) with ESMTP id 47Mk0Y14sLz9v0G6; Tue, 26 Nov 2019 13:36:13 +0100 (CET) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=e0WOCwbd; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id tm_ptMGOF88o; Tue, 26 Nov 2019 13:36:13 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 47Mk0Y02Dyz9v0G3; Tue, 26 Nov 2019 13:36:13 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1574771773; bh=8QgIQ71YTNVzSY6FhAVflXh/3XEeMxBtSGOEfNUDtow=; h=In-Reply-To:References:From:Subject:To:Cc:Date:From; b=e0WOCwbdcMKnp4QyKaXtf8ty1cyFNEcqDCIkIA0nbLxPTwoRgnJtDs5jOPs8m+QHk iAUEpz7OWL0L1tm0JeoWXINECE8OTSSrVmyXo4HFErZMTH3AGt10xVjB5rzZVIn/Zp W4BM8NfaeZw5H8sU9v6J3Q6onewVnH+omjuw09+w= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 4F4738B7FC; Tue, 26 Nov 2019 13:36:14 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id b0QeyJu1o0UF; Tue, 26 Nov 2019 13:36:14 +0100 (CET) Received: from po16098vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 197AE8B771; Tue, 26 Nov 2019 13:36:14 +0100 (CET) Received: by po16098vm.idsi0.si.c-s.fr (Postfix, from userid 0) id D9EED6B76A; Tue, 26 Nov 2019 12:36:13 +0000 (UTC) Message-Id: <53512a73668924639e88b3bf1cef8d5b115aa9ca.1574771541.git.christophe.leroy@c-s.fr> In-Reply-To: References: From: Christophe Leroy Subject: [PATCH v4 10/16] powerpc/8xx: drop exception entries for non-existing exceptions To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org Date: Tue, 26 Nov 2019 12:36:13 +0000 (UTC) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: head_8xx.S has entries for all exceptions from 0x100 to 0x1f00. Several of them do not exist and are never generated by the 8xx in accordance with the documentation. Remove those entry points to make some room for future growing exception code. Signed-off-by: Christophe Leroy --- arch/powerpc/kernel/head_8xx.S | 29 ----------------------------- 1 file changed, 29 deletions(-) diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 3de9c5f1746c..5aa63693f790 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -134,18 +134,6 @@ MachineCheck: addi r3,r1,STACK_FRAME_OVERHEAD EXC_XFER_STD(0x200, machine_check_exception) -/* Data access exception. - * This is "never generated" by the MPC8xx. - */ - . = 0x300 -DataAccess: - -/* Instruction access exception. - * This is "never generated" by the MPC8xx. - */ - . = 0x400 -InstructionAccess: - /* External interrupt */ EXCEPTION(0x500, HardwareInterrupt, do_IRQ, EXC_XFER_LITE) @@ -162,16 +150,9 @@ Alignment: /* Program check exception */ EXCEPTION(0x700, ProgramCheck, program_check_exception, EXC_XFER_STD) -/* No FPU on MPC8xx. This exception is not supposed to happen. -*/ - EXCEPTION(0x800, FPUnavailable, unknown_exception, EXC_XFER_STD) - /* Decrementer */ EXCEPTION(0x900, Decrementer, timer_interrupt, EXC_XFER_LITE) - EXCEPTION(0xa00, Trap_0a, unknown_exception, EXC_XFER_STD) - EXCEPTION(0xb00, Trap_0b, unknown_exception, EXC_XFER_STD) - /* System call */ . = 0xc00 SystemCall: @@ -179,8 +160,6 @@ SystemCall: /* Single step - not used on 601 */ EXCEPTION(0xd00, SingleStep, single_step_exception, EXC_XFER_STD) - EXCEPTION(0xe00, Trap_0e, unknown_exception, EXC_XFER_STD) - EXCEPTION(0xf00, Trap_0f, unknown_exception, EXC_XFER_STD) /* On the MPC8xx, this is a software emulation interrupt. It occurs * for all unimplemented and illegal instructions. @@ -507,14 +486,6 @@ DARFixed:/* Return from dcbx instruction bug workaround */ /* 0x300 is DataAccess exception, needed by bad_page_fault() */ EXC_XFER_LITE(0x300, handle_page_fault) - EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_STD) - EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_STD) - EXCEPTION(0x1700, Trap_17, unknown_exception, EXC_XFER_STD) - EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_STD) - EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_STD) - EXCEPTION(0x1a00, Trap_1a, unknown_exception, EXC_XFER_STD) - EXCEPTION(0x1b00, Trap_1b, unknown_exception, EXC_XFER_STD) - /* On the MPC8xx, these next four traps are used for development * support of breakpoints and such. Someday I will get around to * using them. -- 2.13.3