delivery.c

xen 3.2.2 源码

#include <xen/config.h>
#include <xen/irq.h>
#include <xen/sched.h>
#include <asm/current.h>
#include <asm/smp.h>
#include <asm/hardirq.h>
#include <mach_apic.h>


/*
 * LOGICAL FLAT DELIVERY MODE (multicast via bitmask to <= 8 logical APIC IDs).
 */

void init_apic_ldr_flat(void)
{
	unsigned long val;

	apic_write_around(APIC_DFR, APIC_DFR_FLAT);
	val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
	val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
	apic_write_around(APIC_LDR, val);
}

void clustered_apic_check_flat(void)
{
	printk("Enabling APIC mode:  Flat.  Using %d I/O APICs\n", nr_ioapics);
}

cpumask_t target_cpus_flat(void)
{
	return cpu_online_map;
} 

unsigned int cpu_mask_to_apicid_flat(cpumask_t cpumask)
{
	return cpus_addr(cpumask)[0];
}


/*
 * PHYSICAL DELIVERY MODE (unicast to physical APIC IDs).
 */

void init_apic_ldr_phys(void)
{
	unsigned long val;
	apic_write_around(APIC_DFR, APIC_DFR_FLAT);
	/* A dummy logical ID should be fine. We only deliver in phys mode. */
	val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
	apic_write_around(APIC_LDR, val);
}

void clustered_apic_check_phys(void)
{
	printk("Enabling APIC mode:  Phys.  Using %d I/O APICs\n", nr_ioapics);
}

cpumask_t target_cpus_phys(void)
{
	/* IRQs will get bound more accurately later. */
	return cpumask_of_cpu(0);
}

unsigned int cpu_mask_to_apicid_phys(cpumask_t cpumask)
{
	/* As we are using single CPU as destination, pick only one CPU here */
	return cpu_physical_id(first_cpu(cpumask));
}