x86: move generic_processor_info to apic_32.c

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 82 insertions, 0 deletions

diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c
index 65036bbaf058..a99398f71234 100644
--- a/arch/x86/kernel/apic_32.c
+++ b/arch/x86/kernel/apic_32.c
@@ -1469,6 +1469,88 @@ void disconnect_bsp_APIC(int virt_wire_setup)
         }
 }
 
+unsigned int __cpuinitdata maxcpus = NR_CPUS;
+
+void __cpuinit generic_processor_info(int apicid, int version)
+{
+        int cpu;
+        cpumask_t tmp_map;
+        physid_mask_t phys_cpu;
+
+        /*
+         * Validate version
+         */
+        if (version == 0x0) {
+                printk(KERN_WARNING "BIOS bug, APIC version is 0 for CPU#%d! "
+                                "fixing up to 0x10. (tell your hw vendor)\n",
+                                version);
+                version = 0x10;
+        }
+        apic_version[apicid] = version;
+
+        phys_cpu = apicid_to_cpu_present(apicid);
+        physids_or(phys_cpu_present_map, phys_cpu_present_map, phys_cpu);
+
+        if (num_processors >= NR_CPUS) {
+                printk(KERN_WARNING "WARNING: NR_CPUS limit of %i reached."
+                        "  Processor ignored.\n", NR_CPUS);
+                return;
+        }
+
+        if (num_processors >= maxcpus) {
+                printk(KERN_WARNING "WARNING: maxcpus limit of %i reached."
+                        " Processor ignored.\n", maxcpus);
+                return;
+        }
+
+        num_processors++;
+        cpus_complement(tmp_map, cpu_present_map);
+        cpu = first_cpu(tmp_map);
+
+        if (apicid == boot_cpu_physical_apicid)
+                /*
+                 * x86_bios_cpu_apicid is required to have processors listed
+                 * in same order as logical cpu numbers. Hence the first
+                 * entry is BSP, and so on.
+                 */
+                cpu = 0;
+
+        /*
+         * Would be preferable to switch to bigsmp when CONFIG_HOTPLUG_CPU=y
+         * but we need to work other dependencies like SMP_SUSPEND etc
+         * before this can be done without some confusion.
+         * if (CPU_HOTPLUG_ENABLED || num_processors > 8)
+         *       - Ashok Raj <ashok.raj@intel.com>
+         */
+        if (num_processors > 8) {
+                switch (boot_cpu_data.x86_vendor) {
+                case X86_VENDOR_INTEL:
+                        if (!APIC_XAPIC(version)) {
+                                def_to_bigsmp = 0;
+                                break;
+                        }
+                        /* If P4 and above fall through */
+                case X86_VENDOR_AMD:
+                        def_to_bigsmp = 1;
+                }
+        }
+#ifdef CONFIG_SMP
+        /* are we being called early in kernel startup? */
+        if (x86_cpu_to_apicid_early_ptr) {
+                u16 *cpu_to_apicid = x86_cpu_to_apicid_early_ptr;
+                u16 *bios_cpu_apicid = x86_bios_cpu_apicid_early_ptr;
+
+                cpu_to_apicid[cpu] = apicid;
+                bios_cpu_apicid[cpu] = apicid;
+        } else {
+                per_cpu(x86_cpu_to_apicid, cpu) = apicid;
+                per_cpu(x86_bios_cpu_apicid, cpu) = apicid;
+        }
+#endif
+        cpu_set(cpu, cpu_possible_map);
+        cpu_set(cpu, cpu_present_map);
+}
+
 /*
  * Power management
  */