/* vim: set ts=4: *//* * Copywrite 2002 Der Herr Hofrat * License GPL V2 * Author der.herr@hofr.at *//* * example of allocating 32MB of reserved memory to your rt-thread * reserve the memory with a mem= kernel commandline option. */#include <rtl.h>#include <time.h>#include <pthread.h>#include <asm/io.h> /* ioremap, iounmap */pthread_t thread;#define PERIOD 100000 /* default period 100us should be ok on all systems */int period=PERIOD;MODULE_PARM(period,"i"); /* total memory assumed to be 128MB */unsigned long memstart=0x06000000;  /* 96MB */MODULE_PARM(memstart,"l");unsigned long memlength=0x02000000; /* 32MB */MODULE_PARM(memlength,"l");void *memptr;void * start_routine(void *arg){	struct sched_param p;	unsigned long *data;	unsigned long *memend;	int i;	time_t t1,t2;	p . sched_priority = 1;	pthread_setschedparam (pthread_self(), SCHED_FIFO, &p);	pthread_make_periodic_np (pthread_self(), gethrtime(), period);	memend=memptr+memlength;	data=memptr;	i=0;	t1=time(NULL);			while (data < memend) {		i++;		pthread_wait_np();		/* fill up the full 32MB with the index */		*data++=(unsigned long)i;	}	t2=time(NULL);		rtl_printf("done at %d\n", (unsigned int)(t2-t1));	return (void *)i;}int init_module(void) {	/* rempa the top 32MB of physical RAM */	printk("mapping %ld bytes at 0x%lx\n",memlength,memstart);	memptr=ioremap(memstart,memlength);	return pthread_create (&thread, NULL, start_routine, 0);}void cleanup_module(void) {	void *thread_retval;	pthread_cancel(thread);	pthread_join(thread,&thread_retval);	printk("thread terminated (return %d)\n",(int)thread_retval);	/* releas the top 32MB of physical RAM */	iounmap(memptr);}