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 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 E4249C2D0C0 for ; Sat, 21 Dec 2019 08:33:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B728B21655 for ; Sat, 21 Dec 2019 08:33:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=c-s.fr header.i=@c-s.fr header.b="oKBnsyrj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727121AbfLUIdI (ORCPT ); Sat, 21 Dec 2019 03:33:08 -0500 Received: from pegase1.c-s.fr ([93.17.236.30]:13338 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726799AbfLUIce (ORCPT ); Sat, 21 Dec 2019 03:32:34 -0500 Received: from localhost (mailhub1-ext [192.168.12.233]) by localhost (Postfix) with ESMTP id 47fzPr2fjwz9txhC; Sat, 21 Dec 2019 09:32:32 +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=oKBnsyrj; 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 pRn4Yk9snwlV; Sat, 21 Dec 2019 09:32:32 +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 47fzPr0vKnz9txh9; Sat, 21 Dec 2019 09:32:32 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1576917152; bh=8QgIQ71YTNVzSY6FhAVflXh/3XEeMxBtSGOEfNUDtow=; h=In-Reply-To:References:From:Subject:To:Cc:Date:From; b=oKBnsyrjIDwG55DGRs6sMyuKB2UbwHsWyARtjtBue+wnCAzRGn3sTPGcQKbJ/neXf Abko1EtAwZWhDimYkOLbD++PSGLsw7eLRvwWHqLL+j3wx+o8oody4avnAiNQ6Prnog 3qgqA7dhFC50qz9WeLsq5Y2PQcBVfBmIrHO8T6hM= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 246718B77C; Sat, 21 Dec 2019 09:32:33 +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 Fd0Po-vIBiTt; Sat, 21 Dec 2019 09:32:33 +0100 (CET) Received: from localhost.localdomain (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id E09418B752; Sat, 21 Dec 2019 09:32:32 +0100 (CET) Received: by localhost.localdomain (Postfix, from userid 0) id A9DF4637B6; Sat, 21 Dec 2019 08:32:32 +0000 (UTC) Message-Id: <66f92866fe9524cf0f056016921c7d53adaef3a0.1576916812.git.christophe.leroy@c-s.fr> In-Reply-To: References: From: Christophe Leroy Subject: [PATCH v5 11/17] powerpc/8xx: drop exception entries for non-existing exceptions To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , dja@axtens.net Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org Date: Sat, 21 Dec 2019 08:32:32 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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