Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758324AbYFZMvf (ORCPT ); Thu, 26 Jun 2008 08:51:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758517AbYFZMhM (ORCPT ); Thu, 26 Jun 2008 08:37:12 -0400 Received: from 238.225.broadband7.iol.cz ([88.102.225.238]:20676 "EHLO monstr.eu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753997AbYFZMhI (ORCPT ); Thu, 26 Jun 2008 08:37:08 -0400 From: monstr@seznam.cz To: linux-kernel@vger.kernel.org Cc: arnd@arndb.de, linux-arch@vger.kernel.org, stephen.neuendorffer@xilinx.com, John.Linn@xilinx.com, john.williams@petalogix.com, matthew@wil.cx, will.newton@gmail.com, drepper@redhat.com, microblaze-uclinux@itee.uq.edu.au, grant.likely@secretlab.ca, linuxppc-dev@ozlabs.org, vapier.adi@gmail.com, alan@lxorguk.ukuu.org.uk, hpa@zytor.com, Michal Simek Subject: [PATCH 25/60] microblaze_v4: process and init task function Date: Thu, 26 Jun 2008 14:29:54 +0200 Message-Id: <1214483429-32360-26-git-send-email-monstr@seznam.cz> X-Mailer: git-send-email 1.5.4.GIT In-Reply-To: <1214483429-32360-25-git-send-email-monstr@seznam.cz> References: <1214483429-32360-1-git-send-email-monstr@seznam.cz> <1214483429-32360-2-git-send-email-monstr@seznam.cz> <1214483429-32360-3-git-send-email-monstr@seznam.cz> <1214483429-32360-4-git-send-email-monstr@seznam.cz> <1214483429-32360-5-git-send-email-monstr@seznam.cz> <1214483429-32360-6-git-send-email-monstr@seznam.cz> <1214483429-32360-7-git-send-email-monstr@seznam.cz> <1214483429-32360-8-git-send-email-monstr@seznam.cz> <1214483429-32360-9-git-send-email-monstr@seznam.cz> <1214483429-32360-10-git-send-email-monstr@seznam.cz> <1214483429-32360-11-git-send-email-monstr@seznam.cz> <1214483429-32360-12-git-send-email-monstr@seznam.cz> <1214483429-32360-13-git-send-email-monstr@seznam.cz> <1214483429-32360-14-git-send-email-monstr@seznam.cz> <1214483429-32360-15-git-send-email-monstr@seznam.cz> <1214483429-32360-16-git-send-email-monstr@seznam.cz> <1214483429-32360-17-git-send-email-monstr@seznam.cz> <1214483429-32360-18-git-send-email-monstr@seznam.cz> <1214483429-32360-19-git-send-email-monstr@seznam.cz> <1214483429-32360-20-git-send-email-monstr@seznam.cz> <1214483429-32360-21-git-send-email-monstr@seznam.cz> <1214483429-32360-22-git-send-email-monstr@seznam.cz> <1214483429-32360-23-git-send-email-monstr@seznam.cz> <1214483429-32360-24-git-send-email-monstr@seznam.cz> <1214483429-32360-25-git-send-email-monstr@seznam.cz> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4932 Lines: 186 From: Michal Simek Signed-off-by: Michal Simek --- arch/microblaze/kernel/init_task.c | 28 ++++++++ arch/microblaze/kernel/process.c | 127 ++++++++++++++++++++++++++++++++++++ 2 files changed, 155 insertions(+), 0 deletions(-) create mode 100644 arch/microblaze/kernel/init_task.c create mode 100644 arch/microblaze/kernel/process.c diff --git a/arch/microblaze/kernel/init_task.c b/arch/microblaze/kernel/init_task.c new file mode 100644 index 0000000..c841b55 --- /dev/null +++ b/arch/microblaze/kernel/init_task.c @@ -0,0 +1,28 @@ +/* + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include +#include +#include + +#include + +static struct fs_struct init_fs = INIT_FS; +static struct signal_struct init_signals = INIT_SIGNALS(init_signals); +static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); +struct mm_struct init_mm = INIT_MM(init_mm); +EXPORT_SYMBOL(init_mm); + +union thread_union init_thread_union + __attribute__((__section__(".data.init_task"))) = +{ INIT_THREAD_INFO(init_task) }; + +struct task_struct init_task = INIT_TASK(init_task); +EXPORT_SYMBOL(init_task); diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c new file mode 100644 index 0000000..c8e6bef --- /dev/null +++ b/arch/microblaze/kernel/process.c @@ -0,0 +1,127 @@ +/* + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include + +#include + +/* FIXME */ +void show_regs(struct pt_regs *regs) +{ + unsigned long *p; + int i; + printk(KERN_INFO "pc:\t0x%08lx\tsp:\t0x%08lx\n", regs->pc, regs->r1); + printk(KERN_INFO + "flags:\t0x%08lx\tear:\t0x%08lx\tesr:\t" + "0x%08lx\tfsr:\t0x%08lx\n", + regs->msr, regs->ear, regs->esr, regs->fsr); + printk(KERN_INFO + "r0:\t0x%08lx\tr1:\t0x%08lx\tr2:\t0x%08lx\tr3\t0x%08lx\n", + 0L, regs->r1, regs->r2, regs->r3); + for (i = 4, p = &(regs->r4); i < 32; i += 4, p += 4) { + printk(KERN_INFO "r%i:\t0x%08lx\tr%i:\t0x%08lx\tr%i:\t" + "0x%08lx\tr%i:\t0x%08lx\n", + i, *p, i+1, *(p+1), i+2, *(p+2), i+3, *(p+3)); + } + printk(KERN_INFO "\n"); +} + +void (*pm_power_off)(void) = NULL; +EXPORT_SYMBOL(pm_power_off); + +void cpu_idle(void) +{ + set_thread_flag(TIF_POLLING_NRFLAG); + + while (1) { + while (!need_resched()) + cpu_relax(); + + preempt_enable_no_resched(); + schedule(); + preempt_disable(); + } +} + +void flush_thread(void) +{ +} + +int copy_thread(int nr, unsigned long clone_flags, unsigned long usp, + unsigned long unused, + struct task_struct *p, struct pt_regs *regs) +{ + struct pt_regs *childregs = task_pt_regs(p); + struct thread_info *ti = task_thread_info(p); + + *childregs = *regs; + + if (user_mode(regs)) + childregs->r1 = usp; + else + childregs->r1 = ((unsigned long) ti) + THREAD_SIZE; + + memset(&ti->cpu_context, 0, sizeof(struct cpu_context)); + ti->cpu_context.r1 = (unsigned long)childregs; + ti->cpu_context.msr = (unsigned long)childregs->msr; + ti->cpu_context.r15 = (unsigned long)ret_from_fork - 8; + + if (clone_flags & CLONE_SETTLS) + ;/* FIXME: not sure what to do */ + + return 0; +} + +/* + * Return saved PC of a blocked thread. + * FIXME this needs to be checked + */ +unsigned long thread_saved_pc(struct task_struct *tsk) +{ + struct cpu_context *ctx = + &(((struct thread_info *)(tsk->stack))->cpu_context); + + /* Check whether the thread is blocked in resume() */ + if (in_sched_functions(ctx->r15)) + return ((unsigned long)ctx->r15); + else + return ctx->r14; +} + +static void kernel_thread_helper(int (*fn)(void *), void *arg) +{ + fn(arg); + do_exit(-1); +} + +int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) +{ + struct pt_regs regs; + int ret; + + memset(®s, 0, sizeof(regs)); + /* store them in non-volatile registers */ + regs.r5 = (unsigned long)fn; + regs.r6 = (unsigned long)arg; + local_save_flags(regs.msr); + regs.pc = (unsigned long)kernel_thread_helper; + regs.kernel_mode = 1; + + ret = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, + ®s, 0, NULL, NULL); + + return ret; +} + +unsigned long get_wchan(struct task_struct *p) +{ +/* TBD (used by procfs) */ + return 0; +} -- 1.5.4.GIT -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/