From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933330AbXGKTZU (ORCPT ); Wed, 11 Jul 2007 15:25:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1764946AbXGKTTi (ORCPT ); Wed, 11 Jul 2007 15:19:38 -0400 Received: from terminus.zytor.com ([192.83.249.54]:38279 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932293AbXGKTTa (ORCPT ); Wed, 11 Jul 2007 15:19:30 -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 15/33] Simple bitops for the new x86 setup code. Date: Wed, 11 Jul 2007 12:18:40 -0700 Message-Id: <11841815411443-git-send-email-hpa@zytor.com> X-Mailer: git-send-email 1.5.2.2 In-Reply-To: <11841815401476-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> Message-Id: <03eade29601f9ca92ea95e241aaa7bfbcaaf0c6c.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 A simple collection of bitops for the new x86 setup code. Signed-off-by: H. Peter Anvin --- arch/i386/boot/bitops.h | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 45 insertions(+), 0 deletions(-) create mode 100644 arch/i386/boot/bitops.h diff --git a/arch/i386/boot/bitops.h b/arch/i386/boot/bitops.h new file mode 100644 index 0000000..8dcc8dc --- /dev/null +++ b/arch/i386/boot/bitops.h @@ -0,0 +1,45 @@ +/* -*- 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/bitops.h + * + * Very simple bitops for the boot code. + */ + +#ifndef BOOT_BITOPS_H +#define BOOT_BITOPS_H +#define _LINUX_BITOPS_H /* Inhibit inclusion of */ + +static inline int constant_test_bit(int nr, const void *addr) +{ + const u32 *p = (const u32 *)addr; + return ((1UL << (nr & 31)) & (p[nr >> 5])) != 0; +} +static inline int variable_test_bit(int nr, const void *addr) +{ + u8 v; + const u32 *p = (const u32 *)addr; + + asm("btl %2,%1; setc %0" : "=qm" (v) : "m" (*p), "Ir" (nr)); + return v; +} + +#define test_bit(nr,addr) \ +(__builtin_constant_p(nr) ? \ + constant_test_bit((nr),(addr)) : \ + variable_test_bit((nr),(addr))) + +static inline void set_bit(int nr, void *addr) +{ + asm("btsl %1,%0" : "+m" (*(u32 *)addr) : "Ir" (nr)); +} + +#endif /* BOOT_BITOPS_H */ -- 1.5.2.2