* Copyright 2004 James Cleverdon, IBM.
* Subject to the GNU Public License, v.2
*
- * Flat APIC subarch code. Maximum 8 CPUs, logical delivery.
+ * Flat APIC subarch code.
*
* Hacked for x86-64 by James Cleverdon from i386 architecture code by
* Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
num = smp_processor_id();
id = 1UL << num;
x86_cpu_to_log_apicid[num] = id;
- apic_write_around(APIC_DFR, APIC_DFR_FLAT);
+ apic_write(APIC_DFR, APIC_DFR_FLAT);
val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
val |= SET_APIC_LOGICAL_ID(id);
- apic_write_around(APIC_LDR, val);
+ apic_write(APIC_LDR, val);
}
static void flat_send_IPI_mask(cpumask_t cpumask, int vector)
* prepare target chip field
*/
cfg = __prepare_ICR2(mask);
- apic_write_around(APIC_ICR2, cfg);
+ apic_write(APIC_ICR2, cfg);
/*
* program the ICR
/*
* Send the IPI. The write to APIC_ICR fires this off.
*/
- apic_write_around(APIC_ICR, cfg);
+ apic_write(APIC_ICR, cfg);
local_irq_restore(flags);
}
static void flat_send_IPI_allbutself(int vector)
{
+#ifndef CONFIG_HOTPLUG_CPU
if (((num_online_cpus()) - 1) >= 1)
__send_IPI_shortcut(APIC_DEST_ALLBUT, vector,APIC_DEST_LOGICAL);
+#else
+ cpumask_t allbutme = cpu_online_map;
+ int me = get_cpu(); /* Ensure we are not preempted when we clear */
+ cpu_clear(me, allbutme);
+
+ if (!cpus_empty(allbutme))
+ flat_send_IPI_mask(allbutme, vector);
+ put_cpu();
+#endif
}
static void flat_send_IPI_all(int vector)
.cpu_mask_to_apicid = flat_cpu_mask_to_apicid,
.phys_pkg_id = phys_pkg_id,
};
+
+/*
+ * Physflat mode is used when there are more than 8 CPUs on a AMD system.
+ * We cannot use logical delivery in this case because the mask
+ * overflows, so use physical mode.
+ */
+
+static cpumask_t physflat_target_cpus(void)
+{
+ return cpumask_of_cpu(0);
+}
+
+static void physflat_send_IPI_mask(cpumask_t cpumask, int vector)
+{
+ send_IPI_mask_sequence(cpumask, vector);
+}
+
+static void physflat_send_IPI_allbutself(int vector)
+{
+ cpumask_t allbutme = cpu_online_map;
+ int me = get_cpu();
+ cpu_clear(me, allbutme);
+ physflat_send_IPI_mask(allbutme, vector);
+ put_cpu();
+}
+
+static void physflat_send_IPI_all(int vector)
+{
+ physflat_send_IPI_mask(cpu_online_map, vector);
+}
+
+static unsigned int physflat_cpu_mask_to_apicid(cpumask_t cpumask)
+{
+ int cpu;
+
+ /*
+ * We're using fixed IRQ delivery, can only return one phys APIC ID.
+ * May as well be the first.
+ */
+ cpu = first_cpu(cpumask);
+ if ((unsigned)cpu < NR_CPUS)
+ return x86_cpu_to_apicid[cpu];
+ else
+ return BAD_APICID;
+}
+
+struct genapic apic_physflat = {
+ .name = "physical flat",
+ .int_delivery_mode = dest_LowestPrio,
+ .int_dest_mode = (APIC_DEST_PHYSICAL != 0),
+ .int_delivery_dest = APIC_DEST_PHYSICAL | APIC_DM_LOWEST,
+ .target_cpus = physflat_target_cpus,
+ .apic_id_registered = flat_apic_id_registered,
+ .init_apic_ldr = flat_init_apic_ldr,/*not needed, but shouldn't hurt*/
+ .send_IPI_all = physflat_send_IPI_all,
+ .send_IPI_allbutself = physflat_send_IPI_allbutself,
+ .send_IPI_mask = physflat_send_IPI_mask,
+ .cpu_mask_to_apicid = physflat_cpu_mask_to_apicid,
+ .phys_pkg_id = phys_pkg_id,
+};