From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030357Ab2CGTtj (ORCPT ); Wed, 7 Mar 2012 14:49:39 -0500 Received: from mx1.redhat.com ([209.132.183.28]:21270 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030250Ab2CGTte (ORCPT ); Wed, 7 Mar 2012 14:49:34 -0500 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells Subject: [PATCH 18/29] Disintegrate asm/system.h for MN10300 To: paul.gortmaker@windriver.com, hpa@zytor.com Cc: torvalds@linux-foundation.org, sfr@canb.auug.org.au, mingo@redhat.com, arnd@arndb.de, dhowells@redhat.com, tglx@linutronix.de, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Date: Wed, 07 Mar 2012 19:49:15 +0000 Message-ID: <20120307194915.15987.59544.stgit@warthog.procyon.org.uk> In-Reply-To: <20120307194548.15987.36073.stgit@warthog.procyon.org.uk> References: <20120307194548.15987.36073.stgit@warthog.procyon.org.uk> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Disintegrate asm/system.h for MN10300. Signed-off-by: David Howells --- arch/mn10300/include/asm/barrier.h | 35 ++++++++++++ arch/mn10300/include/asm/exec.h | 16 +++++ arch/mn10300/include/asm/switch_to.h | 49 ++++++++++++++++ arch/mn10300/include/asm/system.h | 102 ---------------------------------- arch/mn10300/kernel/smp-low.S | 1 5 files changed, 101 insertions(+), 102 deletions(-) create mode 100644 arch/mn10300/include/asm/barrier.h create mode 100644 arch/mn10300/include/asm/exec.h create mode 100644 arch/mn10300/include/asm/switch_to.h delete mode 100644 arch/mn10300/include/asm/system.h diff --git a/arch/mn10300/include/asm/barrier.h b/arch/mn10300/include/asm/barrier.h new file mode 100644 index 0000000..9f2e160 --- /dev/null +++ b/arch/mn10300/include/asm/barrier.h @@ -0,0 +1,35 @@ +/* MN10300 memory barrier definitions + * + * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#ifndef _ASM_BARRIER_H +#define _ASM_BARRIER_H + +#define mb() asm volatile ("": : :"memory") +#define rmb() mb() +#define wmb() asm volatile ("": : :"memory") + +#ifdef CONFIG_SMP +#define smp_mb() mb() +#define smp_rmb() rmb() +#define smp_wmb() wmb() +#define set_mb(var, value) do { xchg(&var, value); } while (0) +#else /* CONFIG_SMP */ +#define smp_mb() barrier() +#define smp_rmb() barrier() +#define smp_wmb() barrier() +#define set_mb(var, value) do { var = value; mb(); } while (0) +#endif /* CONFIG_SMP */ + +#define set_wmb(var, value) do { var = value; wmb(); } while (0) + +#define read_barrier_depends() do {} while (0) +#define smp_read_barrier_depends() do {} while (0) + +#endif /* _ASM_BARRIER_H */ diff --git a/arch/mn10300/include/asm/exec.h b/arch/mn10300/include/asm/exec.h new file mode 100644 index 0000000..c74e367 --- /dev/null +++ b/arch/mn10300/include/asm/exec.h @@ -0,0 +1,16 @@ +/* MN10300 process execution definitions + * + * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#ifndef _ASM_EXEC_H +#define _ASM_EXEC_H + +#define arch_align_stack(x) (x) + +#endif /* _ASM_EXEC_H */ diff --git a/arch/mn10300/include/asm/switch_to.h b/arch/mn10300/include/asm/switch_to.h new file mode 100644 index 0000000..393d311 --- /dev/null +++ b/arch/mn10300/include/asm/switch_to.h @@ -0,0 +1,49 @@ +/* MN10300 task switching definitions + * + * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#ifndef _ASM_SWITCH_TO_H +#define _ASM_SWITCH_TO_H + +#include + +struct task_struct; +struct thread_struct; + +#if !defined(CONFIG_LAZY_SAVE_FPU) +struct fpu_state_struct; +extern asmlinkage void fpu_save(struct fpu_state_struct *); +#define switch_fpu(prev, next) \ + do { \ + if ((prev)->thread.fpu_flags & THREAD_HAS_FPU) { \ + (prev)->thread.fpu_flags &= ~THREAD_HAS_FPU; \ + (prev)->thread.uregs->epsw &= ~EPSW_FE; \ + fpu_save(&(prev)->thread.fpu_state); \ + } \ + } while (0) +#else +#define switch_fpu(prev, next) do {} while (0) +#endif + +/* context switching is now performed out-of-line in switch_to.S */ +extern asmlinkage +struct task_struct *__switch_to(struct thread_struct *prev, + struct thread_struct *next, + struct task_struct *prev_task); + +#define switch_to(prev, next, last) \ +do { \ + switch_fpu(prev, next); \ + current->thread.wchan = (u_long) __builtin_return_address(0); \ + (last) = __switch_to(&(prev)->thread, &(next)->thread, (prev)); \ + mb(); \ + current->thread.wchan = 0; \ +} while (0) + +#endif /* _ASM_SWITCH_TO_H */ diff --git a/arch/mn10300/include/asm/system.h b/arch/mn10300/include/asm/system.h deleted file mode 100644 index 94b4c5e..0000000 --- a/arch/mn10300/include/asm/system.h +++ /dev/null @@ -1,102 +0,0 @@ -/* MN10300 System definitions - * - * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. - */ -#ifndef _ASM_SYSTEM_H -#define _ASM_SYSTEM_H - -#include -#include - -#ifdef __KERNEL__ -#ifndef __ASSEMBLY__ - -#include -#include -#include - -#if !defined(CONFIG_LAZY_SAVE_FPU) -struct fpu_state_struct; -extern asmlinkage void fpu_save(struct fpu_state_struct *); -#define switch_fpu(prev, next) \ - do { \ - if ((prev)->thread.fpu_flags & THREAD_HAS_FPU) { \ - (prev)->thread.fpu_flags &= ~THREAD_HAS_FPU; \ - (prev)->thread.uregs->epsw &= ~EPSW_FE; \ - fpu_save(&(prev)->thread.fpu_state); \ - } \ - } while (0) -#else -#define switch_fpu(prev, next) do {} while (0) -#endif - -struct task_struct; -struct thread_struct; - -extern asmlinkage -struct task_struct *__switch_to(struct thread_struct *prev, - struct thread_struct *next, - struct task_struct *prev_task); - -/* context switching is now performed out-of-line in switch_to.S */ -#define switch_to(prev, next, last) \ -do { \ - switch_fpu(prev, next); \ - current->thread.wchan = (u_long) __builtin_return_address(0); \ - (last) = __switch_to(&(prev)->thread, &(next)->thread, (prev)); \ - mb(); \ - current->thread.wchan = 0; \ -} while (0) - -#define arch_align_stack(x) (x) - -#define nop() asm volatile ("nop") - -/* - * Force strict CPU ordering. - * And yes, this is required on UP too when we're talking - * to devices. - * - * For now, "wmb()" doesn't actually do anything, as all - * Intel CPU's follow what Intel calls a *Processor Order*, - * in which all writes are seen in the program order even - * outside the CPU. - * - * I expect future Intel CPU's to have a weaker ordering, - * but I'd also expect them to finally get their act together - * and add some real memory barriers if so. - * - * Some non intel clones support out of order store. wmb() ceases to be a - * nop for these. - */ - -#define mb() asm volatile ("": : :"memory") -#define rmb() mb() -#define wmb() asm volatile ("": : :"memory") - -#ifdef CONFIG_SMP -#define smp_mb() mb() -#define smp_rmb() rmb() -#define smp_wmb() wmb() -#define set_mb(var, value) do { xchg(&var, value); } while (0) -#else /* CONFIG_SMP */ -#define smp_mb() barrier() -#define smp_rmb() barrier() -#define smp_wmb() barrier() -#define set_mb(var, value) do { var = value; mb(); } while (0) -#endif /* CONFIG_SMP */ - -#define set_wmb(var, value) do { var = value; wmb(); } while (0) - -#define read_barrier_depends() do {} while (0) -#define smp_read_barrier_depends() do {} while (0) - -#endif /* !__ASSEMBLY__ */ -#endif /* __KERNEL__ */ -#endif /* _ASM_SYSTEM_H */ diff --git a/arch/mn10300/kernel/smp-low.S b/arch/mn10300/kernel/smp-low.S index f1845e9..71f1b2f 100644 --- a/arch/mn10300/kernel/smp-low.S +++ b/arch/mn10300/kernel/smp-low.S @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include