Exemple #1
0
static void crisv32_arbiter_init(void)
{
	static int initialized;

	if (initialized)
		return;

	initialized = 1;

	/*
	 * CPU caches are always set to active, but with zero
	 * bandwidth allocated. It should be ok to allocate zero
	 * bandwidth for the caches, because DMA for other channels
	 * will supposedly finish, once their programmed amount is
	 * done, and then the caches will get access according to the
	 * "fixed scheme" for unclaimed slots. Though, if for some
	 * use-case somewhere, there's a maximum CPU latency for
	 * e.g. some interrupt, we have to start allocating specific
	 * bandwidth for the CPU caches too.
	 */
	active_clients[EXT_REGION][10] = active_clients[EXT_REGION][11] = 1;
	crisv32_arbiter_config(EXT_REGION, 0);
	crisv32_arbiter_config(INT_REGION, 0);

	if (request_irq(MEMARB_INTR_VECT, crisv32_arbiter_irq, IRQF_DISABLED,
			"arbiter", NULL))
		printk(KERN_ERR "Couldn't allocate arbiter IRQ\n");

#ifndef CONFIG_ETRAX_KGDB
	/* Global watch for writes to kernel text segment. */
	crisv32_arbiter_watch(virt_to_phys(&_stext), &_etext - &_stext,
			      arbiter_all_clients, arbiter_all_write, NULL);
#endif
}
Exemple #2
0
static void crisv32_arbiter_init(void)
{
	static int initialized;

	if (initialized)
		return;

	initialized = 1;

	/*
                                                      
                                                         
                                                            
                                                           
                                                              
                                                           
                                                         
                                                             
                                     
  */
	active_clients[EXT_REGION][10] = active_clients[EXT_REGION][11] = 1;
	crisv32_arbiter_config(EXT_REGION, 0);
	crisv32_arbiter_config(INT_REGION, 0);

	if (request_irq(MEMARB_INTR_VECT, crisv32_arbiter_irq, IRQF_DISABLED,
			"arbiter", NULL))
		printk(KERN_ERR "Couldn't allocate arbiter IRQ\n");

#ifndef CONFIG_ETRAX_KGDB
	/*                                                 */
	crisv32_arbiter_watch(virt_to_phys(&_stext), &_etext - &_stext,
			      arbiter_all_clients, arbiter_all_write, NULL);
#endif
}