1 files changed, 267 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
new file mode 100644
index 000000000000..d806ecaa948f
--- /dev/null
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -0,0 +1,267 @@
+/*
+ * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
+ *
+ * Drives the local APIC in "clustered mode".
+ */
+#include <linux/threads.h>
+#include <linux/cpumask.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/dmi.h>
+#include <linux/smp.h>
+
+#include <asm/apicdef.h>
+#include <asm/fixmap.h>
+#include <asm/mpspec.h>
+#include <asm/apic.h>
+#include <asm/ipi.h>
+
+static unsigned bigsmp_get_apic_id(unsigned long x)
+{
+	return (x >> 24) & 0xFF;
+}
+
+static int bigsmp_apic_id_registered(void)
+{
+	return 1;
+}
+
+static const cpumask_t *bigsmp_target_cpus(void)
+{
+#ifdef CONFIG_SMP
+	return &cpu_online_map;
+#else
+	return &cpumask_of_cpu(0);
+#endif
+}
+
+static unsigned long bigsmp_check_apicid_used(physid_mask_t bitmap, int apicid)
+{
+	return 0;
+}
+
+static unsigned long bigsmp_check_apicid_present(int bit)
+{
+	return 1;
+}
+
+static inline unsigned long calculate_ldr(int cpu)
+{
+	unsigned long val, id;
+
+	val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
+	id = per_cpu(x86_bios_cpu_apicid, cpu);
+	val |= SET_APIC_LOGICAL_ID(id);
+
+	return val;
+}
+
+/*
+ * Set up the logical destination ID.
+ *
+ * Intel recommends to set DFR, LDR and TPR before enabling
+ * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
+ * document number 292116).  So here it goes...
+ */
+static void bigsmp_init_apic_ldr(void)
+{
+	unsigned long val;
+	int cpu = smp_processor_id();
+
+	apic_write(APIC_DFR, APIC_DFR_FLAT);
+	val = calculate_ldr(cpu);
+	apic_write(APIC_LDR, val);
+}
+
+static void bigsmp_setup_apic_routing(void)
+{
+	printk(KERN_INFO
+		"Enabling APIC mode:  Physflat.  Using %d I/O APICs\n",
+		nr_ioapics);
+}
+
+static int bigsmp_apicid_to_node(int logical_apicid)
+{
+	return apicid_2_node[hard_smp_processor_id()];
+}
+
+static int bigsmp_cpu_present_to_apicid(int mps_cpu)
+{
+	if (mps_cpu < nr_cpu_ids)
+		return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
+
+	return BAD_APICID;
+}
+
+static physid_mask_t bigsmp_apicid_to_cpu_present(int phys_apicid)
+{
+	return physid_mask_of_physid(phys_apicid);
+}
+
+/* Mapping from cpu number to logical apicid */
+static inline int bigsmp_cpu_to_logical_apicid(int cpu)
+{
+	if (cpu >= nr_cpu_ids)
+		return BAD_APICID;
+	return cpu_physical_id(cpu);
+}
+
+static physid_mask_t bigsmp_ioapic_phys_id_map(physid_mask_t phys_map)
+{
+	/* For clustered we don't have a good way to do this yet - hack */
+	return physids_promote(0xFFL);
+}
+
+static int bigsmp_check_phys_apicid_present(int boot_cpu_physical_apicid)
+{
+	return 1;
+}
+
+/* As we are using single CPU as destination, pick only one CPU here */
+static unsigned int bigsmp_cpu_mask_to_apicid(const cpumask_t *cpumask)
+{
+	return bigsmp_cpu_to_logical_apicid(first_cpu(*cpumask));
+}
+
+static unsigned int bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
+			      const struct cpumask *andmask)
+{
+	int cpu;
+
+	/*
+	 * We're using fixed IRQ delivery, can only return one phys APIC ID.
+	 * May as well be the first.
+	 */
+	for_each_cpu_and(cpu, cpumask, andmask) {
+		if (cpumask_test_cpu(cpu, cpu_online_mask))
+			break;
+	}
+	if (cpu < nr_cpu_ids)
+		return bigsmp_cpu_to_logical_apicid(cpu);
+
+	return BAD_APICID;
+}
+
+static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
+{
+	return cpuid_apic >> index_msb;
+}
+
+static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector)
+{
+	default_send_IPI_mask_sequence_phys(mask, vector);
+}
+
+static void bigsmp_send_IPI_allbutself(int vector)
+{
+	default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
+}
+
+static void bigsmp_send_IPI_all(int vector)
+{
+	bigsmp_send_IPI_mask(cpu_online_mask, vector);
+}
+
+static int dmi_bigsmp; /* can be set by dmi scanners */
+
+static int hp_ht_bigsmp(const struct dmi_system_id *d)
+{
+	printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
+	dmi_bigsmp = 1;
+
+	return 0;
+}
+
+
+static const struct dmi_system_id bigsmp_dmi_table[] = {
+	{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
+		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
+			DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
+		}
+	},
+
+	{ hp_ht_bigsmp, "HP ProLiant DL740",
+		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
+			DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
+		}
+	},
+	{ } /* NULL entry stops DMI scanning */
+};
+
+static void bigsmp_vector_allocation_domain(int cpu, cpumask_t *retmask)
+{
+	cpus_clear(*retmask);
+	cpu_set(cpu, *retmask);
+}
+
+static int probe_bigsmp(void)
+{
+	if (def_to_bigsmp)
+		dmi_bigsmp = 1;
+	else
+		dmi_check_system(bigsmp_dmi_table);
+
+	return dmi_bigsmp;
+}
+
+struct apic apic_bigsmp = {
+
+	.name				= "bigsmp",
+	.probe				= probe_bigsmp,
+	.acpi_madt_oem_check		= NULL,
+	.apic_id_registered		= bigsmp_apic_id_registered,
+
+	.irq_delivery_mode		= dest_Fixed,
+	/* phys delivery to target CPU: */
+	.irq_dest_mode			= 0,
+
+	.target_cpus			= bigsmp_target_cpus,
+	.disable_esr			= 1,
+	.dest_logical			= 0,
+	.check_apicid_used		= bigsmp_check_apicid_used,
+	.check_apicid_present		= bigsmp_check_apicid_present,
+
+	.vector_allocation_domain	= bigsmp_vector_allocation_domain,
+	.init_apic_ldr			= bigsmp_init_apic_ldr,
+
+	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
+	.setup_apic_routing		= bigsmp_setup_apic_routing,
+	.multi_timer_check		= NULL,
+	.apicid_to_node			= bigsmp_apicid_to_node,
+	.cpu_to_logical_apicid		= bigsmp_cpu_to_logical_apicid,
+	.cpu_present_to_apicid		= bigsmp_cpu_present_to_apicid,
+	.apicid_to_cpu_present		= bigsmp_apicid_to_cpu_present,
+	.setup_portio_remap		= NULL,
+	.check_phys_apicid_present	= bigsmp_check_phys_apicid_present,
+	.enable_apic_mode		= NULL,
+	.phys_pkg_id			= bigsmp_phys_pkg_id,
+	.mps_oem_check			= NULL,
+
+	.get_apic_id			= bigsmp_get_apic_id,
+	.set_apic_id			= NULL,
+	.apic_id_mask			= 0xFF << 24,
+
+	.cpu_mask_to_apicid		= bigsmp_cpu_mask_to_apicid,
+	.cpu_mask_to_apicid_and		= bigsmp_cpu_mask_to_apicid_and,
+
+	.send_IPI_mask			= bigsmp_send_IPI_mask,
+	.send_IPI_mask_allbutself	= NULL,
+	.send_IPI_allbutself		= bigsmp_send_IPI_allbutself,
+	.send_IPI_all			= bigsmp_send_IPI_all,
+	.send_IPI_self			= default_send_IPI_self,
+
+	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
+	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
+
+	.wait_for_init_deassert		= default_wait_for_init_deassert,
+
+	.smp_callin_clear_local_apic	= NULL,
+	.inquire_remote_apic		= default_inquire_remote_apic,
+
+	.read				= native_apic_mem_read,
+	.write				= native_apic_mem_write,
+	.icr_read			= native_apic_icr_read,
+	.icr_write			= native_apic_icr_write,
+	.wait_icr_idle			= native_apic_wait_icr_idle,
+	.safe_wait_icr_idle		= native_safe_apic_wait_icr_idle,
+};