/* * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> * Copyright (C) 2008-2009 PetaLogix * 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 <linux/module.h>#include <linux/sched.h>#include <linux/pm.h>#include <linux/tick.h>#include <linux/bitops.h>#include <asm/system.h>#include <asm/pgalloc.h> void show_regs(struct pt_regs *regs){	printk(KERN_INFO " Registers dump: mode=%X\r\n", regs->pt_mode);	printk(KERN_INFO " r1=%08lX, r2=%08lX, r3=%08lX, r4=%08lX\n",				regs->r1, regs->r2, regs->r3, regs->r4);	printk(KERN_INFO " r5=%08lX, r6=%08lX, r7=%08lX, r8=%08lX\n",				regs->r5, regs->r6, regs->r7, regs->r8);	printk(KERN_INFO " r9=%08lX, r10=%08lX, r11=%08lX, r12=%08lX\n",				regs->r9, regs->r10, regs->r11, regs->r12);	printk(KERN_INFO " r13=%08lX, r14=%08lX, r15=%08lX, r16=%08lX\n",				regs->r13, regs->r14, regs->r15, regs->r16);	printk(KERN_INFO " r17=%08lX, r18=%08lX, r19=%08lX, r20=%08lX\n",				regs->r17, regs->r18, regs->r19, regs->r20);	printk(KERN_INFO " r21=%08lX, r22=%08lX, r23=%08lX, r24=%08lX\n",				regs->r21, regs->r22, regs->r23, regs->r24);	printk(KERN_INFO " r25=%08lX, r26=%08lX, r27=%08lX, r28=%08lX\n",				regs->r25, regs->r26, regs->r27, regs->r28);	printk(KERN_INFO " r29=%08lX, r30=%08lX, r31=%08lX, rPC=%08lX\n",				regs->r29, regs->r30, regs->r31, regs->pc);	printk(KERN_INFO " msr=%08lX, ear=%08lX, esr=%08lX, fsr=%08lX\n",				regs->msr, regs->ear, regs->esr, regs->fsr);} void (*pm_idle)(void);void (*pm_power_off)(void) = NULL;EXPORT_SYMBOL(pm_power_off); static int hlt_counter = 1; void disable_hlt(void){	hlt_counter++;}EXPORT_SYMBOL(disable_hlt); void enable_hlt(void){	hlt_counter--;}EXPORT_SYMBOL(enable_hlt); static int __init nohlt_setup(char *__unused){	hlt_counter = 1;	return 1;}__setup("nohlt", nohlt_setup); static int __init hlt_setup(char *__unused){	hlt_counter = 0;	return 1;}__setup("hlt", hlt_setup); void default_idle(void){	if (!hlt_counter) {		clear_thread_flag(TIF_POLLING_NRFLAG);		smp_mb__after_clear_bit();		local_irq_disable();		while (!need_resched())			cpu_sleep();		local_irq_enable();		set_thread_flag(TIF_POLLING_NRFLAG);	} else		while (!need_resched())			cpu_relax();} void cpu_idle(void){	set_thread_flag(TIF_POLLING_NRFLAG); 	/* endless idle loop with no priority at all */	while (1) {		void (*idle)(void) = pm_idle; 		if (!idle)			idle = default_idle; 		tick_nohz_stop_sched_tick(1);		while (!need_resched())			idle();		tick_nohz_restart_sched_tick(); 		preempt_enable_no_resched();		schedule();		preempt_disable();		check_pgt_cache();	}} void flush_thread(void){} int copy_thread(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)		; 	return 0;} /* * Return saved PC of a blocked thread. */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; 	memset(&regs, 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.pt_mode = 1; 	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,			&regs, 0, NULL, NULL);} unsigned long get_wchan(struct task_struct *p){/* TBD (used by procfs) */	return 0;} /* Set up a thread for executing a new program */void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp){	set_fs(USER_DS);	regs->pc = pc;	regs->r1 = usp;	regs->pt_mode = 0;}