1 files changed, 284 insertions, 0 deletions

diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
new file mode 100644
index 000000000000..141c99a1c264
--- /dev/null
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -0,0 +1,284 @@
+/*
+ * Default generic APIC driver. This handles up to 8 CPUs.
+ *
+ * Copyright 2003 Andi Kleen, SuSE Labs.
+ * Subject to the GNU Public License, v.2
+ *
+ * Generic x86 APIC driver probe layer.
+ */
+#include <linux/threads.h>
+#include <linux/cpumask.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/ctype.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <asm/fixmap.h>
+#include <asm/mpspec.h>
+#include <asm/apicdef.h>
+#include <asm/apic.h>
+#include <asm/setup.h>
+
+#include <linux/threads.h>
+#include <linux/cpumask.h>
+#include <asm/mpspec.h>
+#include <asm/fixmap.h>
+#include <asm/apicdef.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/smp.h>
+#include <linux/init.h>
+#include <asm/ipi.h>
+
+#include <linux/smp.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <asm/acpi.h>
+#include <asm/e820.h>
+#include <asm/setup.h>
+
+#ifdef CONFIG_HOTPLUG_CPU
+#define DEFAULT_SEND_IPI        (1)
+#else
+#define DEFAULT_SEND_IPI        (0)
+#endif
+
+int no_broadcast = DEFAULT_SEND_IPI;
+
+static __init int no_ipi_broadcast(char *str)
+{
+        get_option(&str, &no_broadcast);
+        pr_info("Using %s mode\n",
+                no_broadcast ? "No IPI Broadcast" : "IPI Broadcast");
+        return 1;
+}
+__setup("no_ipi_broadcast=", no_ipi_broadcast);
+
+static int __init print_ipi_mode(void)
+{
+        pr_info("Using IPI %s mode\n",
+                no_broadcast ? "No-Shortcut" : "Shortcut");
+        return 0;
+}
+late_initcall(print_ipi_mode);
+
+void default_setup_apic_routing(void)
+{
+#ifdef CONFIG_X86_IO_APIC
+        printk(KERN_INFO
+                "Enabling APIC mode:  Flat.  Using %d I/O APICs\n",
+                nr_ioapics);
+#endif
+}
+
+static void default_vector_allocation_domain(int cpu, struct cpumask *retmask)
+{
+        /*
+         * Careful. Some cpus do not strictly honor the set of cpus
+         * specified in the interrupt destination when using lowest
+         * priority interrupt delivery mode.
+         *
+         * In particular there was a hyperthreading cpu observed to
+         * deliver interrupts to the wrong hyperthread when only one
+         * hyperthread was specified in the interrupt desitination.
+         */
+        *retmask = (cpumask_t) { { [0] = APIC_ALL_CPUS } };
+}
+
+/* should be called last. */
+static int probe_default(void)
+{
+        return 1;
+}
+
+struct apic apic_default = {
+
+        .name                           = "default",
+        .probe                          = probe_default,
+        .acpi_madt_oem_check            = NULL,
+        .apic_id_registered             = default_apic_id_registered,
+
+        .irq_delivery_mode              = dest_LowestPrio,
+        /* logical delivery broadcast to all CPUs: */
+        .irq_dest_mode                  = 1,
+
+        .target_cpus                    = default_target_cpus,
+        .disable_esr                    = 0,
+        .dest_logical                   = APIC_DEST_LOGICAL,
+        .check_apicid_used              = default_check_apicid_used,
+        .check_apicid_present           = default_check_apicid_present,
+
+        .vector_allocation_domain       = default_vector_allocation_domain,
+        .init_apic_ldr                  = default_init_apic_ldr,
+
+        .ioapic_phys_id_map             = default_ioapic_phys_id_map,
+        .setup_apic_routing             = default_setup_apic_routing,
+        .multi_timer_check              = NULL,
+        .apicid_to_node                 = default_apicid_to_node,
+        .cpu_to_logical_apicid          = default_cpu_to_logical_apicid,
+        .cpu_present_to_apicid          = default_cpu_present_to_apicid,
+        .apicid_to_cpu_present          = default_apicid_to_cpu_present,
+        .setup_portio_remap             = NULL,
+        .check_phys_apicid_present      = default_check_phys_apicid_present,
+        .enable_apic_mode               = NULL,
+        .phys_pkg_id                    = default_phys_pkg_id,
+        .mps_oem_check                  = NULL,
+
+        .get_apic_id                    = default_get_apic_id,
+        .set_apic_id                    = NULL,
+        .apic_id_mask                   = 0x0F << 24,
+
+        .cpu_mask_to_apicid             = default_cpu_mask_to_apicid,
+        .cpu_mask_to_apicid_and         = default_cpu_mask_to_apicid_and,
+
+        .send_IPI_mask                  = default_send_IPI_mask_logical,
+        .send_IPI_mask_allbutself       = default_send_IPI_mask_allbutself_logical,
+        .send_IPI_allbutself            = default_send_IPI_allbutself,
+        .send_IPI_all                   = default_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,
+};
+
+extern struct apic apic_numaq;
+extern struct apic apic_summit;
+extern struct apic apic_bigsmp;
+extern struct apic apic_es7000;
+extern struct apic apic_es7000_cluster;
+extern struct apic apic_default;
+
+struct apic *apic = &apic_default;
+EXPORT_SYMBOL_GPL(apic);
+
+static struct apic *apic_probe[] __initdata = {
+#ifdef CONFIG_X86_NUMAQ
+        &apic_numaq,
+#endif
+#ifdef CONFIG_X86_SUMMIT
+        &apic_summit,
+#endif
+#ifdef CONFIG_X86_BIGSMP
+        &apic_bigsmp,
+#endif
+#ifdef CONFIG_X86_ES7000
+        &apic_es7000,
+        &apic_es7000_cluster,
+#endif
+        &apic_default,  /* must be last */
+        NULL,
+};
+
+static int cmdline_apic __initdata;
+static int __init parse_apic(char *arg)
+{
+        int i;
+
+        if (!arg)
+                return -EINVAL;
+
+        for (i = 0; apic_probe[i]; i++) {
+                if (!strcmp(apic_probe[i]->name, arg)) {
+                        apic = apic_probe[i];
+                        cmdline_apic = 1;
+                        return 0;
+                }
+        }
+
+        /* Parsed again by __setup for debug/verbose */
+        return 0;
+}
+early_param("apic", parse_apic);
+
+void __init generic_bigsmp_probe(void)
+{
+#ifdef CONFIG_X86_BIGSMP
+        /*
+         * This routine is used to switch to bigsmp mode when
+         * - There is no apic= option specified by the user
+         * - generic_apic_probe() has chosen apic_default as the sub_arch
+         * - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support
+         */
+
+        if (!cmdline_apic && apic == &apic_default) {
+                if (apic_bigsmp.probe()) {
+                        apic = &apic_bigsmp;
+                        printk(KERN_INFO "Overriding APIC driver with %s\n",
+                               apic->name);
+                }
+        }
+#endif
+}
+
+void __init generic_apic_probe(void)
+{
+        if (!cmdline_apic) {
+                int i;
+                for (i = 0; apic_probe[i]; i++) {
+                        if (apic_probe[i]->probe()) {
+                                apic = apic_probe[i];
+                                break;
+                        }
+                }
+                /* Not visible without early console */
+                if (!apic_probe[i])
+                        panic("Didn't find an APIC driver");
+        }
+        printk(KERN_INFO "Using APIC driver %s\n", apic->name);
+}
+
+/* These functions can switch the APIC even after the initial ->probe() */
+
+int __init
+generic_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
+{
+        int i;
+
+        for (i = 0; apic_probe[i]; ++i) {
+                if (!apic_probe[i]->mps_oem_check)
+                        continue;
+                if (!apic_probe[i]->mps_oem_check(mpc, oem, productid))
+                        continue;
+
+                if (!cmdline_apic) {
+                        apic = apic_probe[i];
+                        printk(KERN_INFO "Switched to APIC driver `%s'.\n",
+                               apic->name);
+                }
+                return 1;
+        }
+        return 0;
+}
+
+int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+{
+        int i;
+
+        for (i = 0; apic_probe[i]; ++i) {
+                if (!apic_probe[i]->acpi_madt_oem_check)
+                        continue;
+                if (!apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id))
+                        continue;
+
+                if (!cmdline_apic) {
+                        apic = apic_probe[i];
+                        printk(KERN_INFO "Switched to APIC driver `%s'.\n",
+                               apic->name);
+                }
+                return 1;
+        }
+        return 0;
+}