Revert "i386: move apic init in init_IRQs"

[linux-2.6] / arch / i386 / kernel / smpboot.c

diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index 5a2bbe0c4ffff7ffcc5344d3d7015bd6651061d8..01b618e73ecd14ba6f9dedea08a718865715d266 100644 (file)
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -1078,16 +1078,6 @@ void *xquad_portio;
 EXPORT_SYMBOL(xquad_portio);
 #endif
 
-/*
- * Fall back to non SMP mode after errors.
- *
- */
-static __init void disable_smp(void)
-{
-       cpu_set(0, cpu_sibling_map[0]);
-       cpu_set(0, cpu_core_map[0]);
-}
-
 static void __init smp_boot_cpus(unsigned int max_cpus)
 {
        int apicid, cpu, bit, kicked;
@@ -1100,6 +1090,7 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
        printk("CPU%d: ", 0);
        print_cpu_info(&cpu_data[0]);
 
+       boot_cpu_physical_apicid = GET_APIC_ID(apic_read(APIC_ID));
        boot_cpu_logical_apicid = logical_smp_processor_id();
        x86_cpu_to_apicid[0] = boot_cpu_physical_apicid;
 
@@ -1111,27 +1102,68 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
        cpus_clear(cpu_core_map[0]);
        cpu_set(0, cpu_core_map[0]);
 
-       map_cpu_to_logical_apicid();
-
        /*
         * If we couldn't find an SMP configuration at boot time,
         * get out of here now!
         */
        if (!smp_found_config && !acpi_lapic) {
                printk(KERN_NOTICE "SMP motherboard not detected.\n");
-               disable_smp();
+               smpboot_clear_io_apic_irqs();
+               phys_cpu_present_map = physid_mask_of_physid(0);
+               if (APIC_init_uniprocessor())
+                       printk(KERN_NOTICE "Local APIC not detected."
+                                          " Using dummy APIC emulation.\n");
+               map_cpu_to_logical_apicid();
+               cpu_set(0, cpu_sibling_map[0]);
+               cpu_set(0, cpu_core_map[0]);
+               return;
+       }
+
+       /*
+        * Should not be necessary because the MP table should list the boot
+        * CPU too, but we do it for the sake of robustness anyway.
+        * Makes no sense to do this check in clustered apic mode, so skip it
+        */
+       if (!check_phys_apicid_present(boot_cpu_physical_apicid)) {
+               printk("weird, boot CPU (#%d) not listed by the BIOS.\n",
+                               boot_cpu_physical_apicid);
+               physid_set(hard_smp_processor_id(), phys_cpu_present_map);
+       }
+
+       /*
+        * If we couldn't find a local APIC, then get out of here now!
+        */
+       if (APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid]) && !cpu_has_apic) {
+               printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
+                       boot_cpu_physical_apicid);
+               printk(KERN_ERR "... forcing use of dummy APIC emulation. (tell your hw vendor)\n");
+               smpboot_clear_io_apic_irqs();
+               phys_cpu_present_map = physid_mask_of_physid(0);
+               cpu_set(0, cpu_sibling_map[0]);
+               cpu_set(0, cpu_core_map[0]);
                return;
        }
 
+       verify_local_APIC();
+
        /*
         * If SMP should be disabled, then really disable it!
         */
-       if (!max_cpus || (enable_local_apic < 0)) {
-               printk(KERN_INFO "SMP mode deactivated.\n");
-               disable_smp();
+       if (!max_cpus) {
+               smp_found_config = 0;
+               printk(KERN_INFO "SMP mode deactivated, forcing use of dummy APIC emulation.\n");
+               smpboot_clear_io_apic_irqs();
+               phys_cpu_present_map = physid_mask_of_physid(0);
+               cpu_set(0, cpu_sibling_map[0]);
+               cpu_set(0, cpu_core_map[0]);
                return;
        }
 
+       connect_bsp_APIC();
+       setup_local_APIC();
+       map_cpu_to_logical_apicid();
+
+
        setup_portio_remap();
 
        /*
@@ -1212,6 +1244,10 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
        cpu_set(0, cpu_sibling_map[0]);
        cpu_set(0, cpu_core_map[0]);
 
+       smpboot_setup_io_apic();
+
+       setup_boot_APIC_clock();
+
        /*
         * Synchronize the TSC with the AP
         */