/* For parallel bootup. */
unsigned long apic_mmio_base __ro_after_init;
+static inline bool apic_accessible(void)
+{
+ return x2apic_mode || apic_mmio_base;
+}
+
/*
* Map cpu index to physical APIC ID
*/
static void apic_pm_activate(void);
-static unsigned long apic_phys __ro_after_init;
-
/*
* Get the LAPIC version
*/
int maxlvt;
u32 v;
- /* APIC hasn't been mapped yet */
- if (!x2apic_mode && !apic_phys)
+ if (!apic_accessible())
return;
maxlvt = lapic_get_maxlvt();
*/
void disable_local_APIC(void)
{
- /* APIC hasn't been mapped yet */
- if (!x2apic_mode && !apic_phys)
+ if (!apic_accessible())
return;
apic_soft_disable();
static __init void apic_set_fixmap(void)
{
set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
- apic_phys = apic_mmio_base = APIC_BASE;
+ apic_mmio_base = APIC_BASE;
apic_printk(APIC_VERBOSE, "mapped APIC to %16lx (%16lx)\n",
apic_mmio_base, mp_lapic_addr);
apic_read_boot_cpu_id(false);
static int __init lapic_insert_resource(void)
{
- if (!apic_phys)
+ if (!apic_mmio_base)
return -1;
/* Put local APIC into the resource map. */
- lapic_resource.start = apic_phys;
+ lapic_resource.start = apic_mmio_base;
lapic_resource.end = lapic_resource.start + PAGE_SIZE - 1;
insert_resource(&iomem_resource, &lapic_resource);