From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933619AbXGKTb7 (ORCPT ); Wed, 11 Jul 2007 15:31:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932685AbXGKTUB (ORCPT ); Wed, 11 Jul 2007 15:20:01 -0400 Received: from terminus.zytor.com ([192.83.249.54]:38289 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932637AbXGKTTn (ORCPT ); Wed, 11 Jul 2007 15:19:43 -0400 From: "H. Peter Anvin" To: torvalds@linux-foundation.org, andi@firstfloor.org, linux-kernel@vger.kernel.org Cc: "H. Peter Anvin" Subject: [x86 setup 24/33] MCA support for new x86 setup code Date: Wed, 11 Jul 2007 12:18:49 -0700 Message-Id: <11841815423652-git-send-email-hpa@zytor.com> X-Mailer: git-send-email 1.5.2.2 In-Reply-To: <11841815421819-git-send-email-hpa@zytor.com> References: <1184181538674-git-send-email-hpa@zytor.com> <118418153862-git-send-email-hpa@zytor.com> <11841815382283-git-send-email-hpa@zytor.com> <11841815392122-git-send-email-hpa@zytor.com> <11841815393975-git-send-email-hpa@zytor.com> <11841815393014-git-send-email-hpa@zytor.com> <1184181539416-git-send-email-hpa@zytor.com> <118418153972-git-send-email-hpa@zytor.com> <11841815391923-git-send-email-hpa@zytor.com> <11841815403678-git-send-email-hpa@zytor.com> <11841815403041-git-send-email-hpa@zytor.com> <11841815402349-git-send-email-hpa@zytor.com> <11841815401013-git-send-email-hpa@zytor.com> <1184181540369-git-send-email-hpa@zytor.com> <11841815401476-git-send-email-hpa@zytor.com> <11841815411443-git-send-email-hpa@zytor.com> <1184181541746-git-send-email-hpa@zytor.com> <11841815411436-git-send-email-hpa@zytor.com> <11841815412873-git-send-email-hpa@zytor.com> <11841815412175-git-send-email-hpa@zytor.com> <1184181541492-git-send-email-hpa@zytor.com> <11841815421028-git-send-email-hpa@zytor.com> <118418154292-git-send-email-hpa@zytor.com> <11841815421819-git-send-email-hpa@zytor.com> Message-Id: <16466ebe45a5054920bf2e67083663eccf8da662.1184181208.git.hpa@zytor.com> In-Reply-To: <7aca4ce0a222438c94300a2ea535270a21db8812.1184181208.git.hpa@zytor.com> References: <7aca4ce0a222438c94300a2ea535270a21db8812.1184181208.git.hpa@zytor.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: H. Peter Anvin MCA probing support for the new x86 setup code. This implements the same functionality as the assembly version. Signed-off-by: H. Peter Anvin --- arch/i386/boot/mca.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 43 insertions(+), 0 deletions(-) create mode 100644 arch/i386/boot/mca.c diff --git a/arch/i386/boot/mca.c b/arch/i386/boot/mca.c new file mode 100644 index 0000000..9b68bd1 --- /dev/null +++ b/arch/i386/boot/mca.c @@ -0,0 +1,43 @@ +/* -*- linux-c -*- ------------------------------------------------------- * + * + * Copyright (C) 1991, 1992 Linus Torvalds + * Copyright 2007 rPath, Inc. - All Rights Reserved + * + * This file is part of the Linux kernel, and is made available under + * the terms of the GNU General Public License version 2. + * + * ----------------------------------------------------------------------- */ + +/* + * arch/i386/boot/mca.c + * + * Get the MCA system description table + */ + +#include "boot.h" + +int query_mca(void) +{ + u8 err; + u16 es, bx, len; + + asm("pushw %%es ; " + "int $0x15 ; " + "setc %0 ; " + "movw %%es, %1 ; " + "popw %%es" + : "=acdSDm" (err), "=acdSDm" (es), "=b" (bx) + : "a" (0xc000)); + + if (err) + return -1; /* No MCA present */ + + set_fs(es); + len = rdfs16(bx); + + if (len > sizeof(boot_params.sys_desc_table)) + len = sizeof(boot_params.sys_desc_table); + + copy_from_fs(&boot_params.sys_desc_table, bx, len); + return 0; +} -- 1.5.2.2