Merge branch 'drm-forlinus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...

[pandora-kernel.git] / arch / i386 / kernel / cpu / common.c

diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
index 74145a3..15aee26 100644 (file)
--- a/arch/i386/kernel/cpu/common.c
+++ b/arch/i386/kernel/cpu/common.c
@@ -18,9 +18,6 @@
 
 #include "cpu.h"
 
-DEFINE_PER_CPU(struct desc_struct, cpu_gdt_table[GDT_ENTRIES]);
-EXPORT_PER_CPU_SYMBOL(cpu_gdt_table);
-
 DEFINE_PER_CPU(unsigned char, cpu_16bit_stack[CPU_16BIT_STACK_SIZE]);
 EXPORT_PER_CPU_SYMBOL(cpu_16bit_stack);
 
@@ -30,8 +27,6 @@ static int disable_x86_serial_nr __devinitdata = 1;
 
 struct cpu_dev * cpu_devs[X86_VENDOR_NUM] = {};
 
-extern void mcheck_init(struct cpuinfo_x86 *c);
-
 extern int disable_pse;
 
 static void default_init(struct cpuinfo_x86 * c)
@@ -209,7 +204,10 @@ static int __devinit have_cpuid_p(void)
 
 /* Do minimum CPU detection early.
    Fields really needed: vendor, cpuid_level, family, model, mask, cache alignment.
-   The others are not touched to avoid unwanted side effects. */
+   The others are not touched to avoid unwanted side effects.
+
+   WARNING: this function is only called on the BP.  Don't add code here
+   that is supposed to run on all CPUs. */
 static void __init early_cpu_detect(void)
 {
        struct cpuinfo_x86 *c = &boot_cpu_data;
@@ -233,20 +231,14 @@ static void __init early_cpu_detect(void)
                cpuid(0x00000001, &tfms, &misc, &junk, &cap0);
                c->x86 = (tfms >> 8) & 15;
                c->x86_model = (tfms >> 4) & 15;
-               if (c->x86 == 0xf) {
+               if (c->x86 == 0xf)
                        c->x86 += (tfms >> 20) & 0xff;
+               if (c->x86 >= 0x6)
                        c->x86_model += ((tfms >> 16) & 0xF) << 4;
-               }
                c->x86_mask = tfms & 15;
                if (cap0 & (1<<19))
                        c->x86_cache_alignment = ((misc >> 8) & 0xff) * 8;
        }
-
-       early_intel_workaround(c);
-
-#ifdef CONFIG_X86_HT
-       phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
-#endif
 }
 
 void __devinit generic_identify(struct cpuinfo_x86 * c)
@@ -294,6 +286,12 @@ void __devinit generic_identify(struct cpuinfo_x86 * c)
                                get_model_name(c); /* Default name */
                }
        }
+
+       early_intel_workaround(c);
+
+#ifdef CONFIG_X86_HT
+       phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
+#endif
 }
 
 static void __devinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c)
@@ -335,7 +333,7 @@ void __devinit identify_cpu(struct cpuinfo_x86 *c)
        c->x86_model = c->x86_mask = 0; /* So far unknown... */
        c->x86_vendor_id[0] = '\0'; /* Unset */
        c->x86_model_id[0] = '\0';  /* Unset */
-       c->x86_num_cores = 1;
+       c->x86_max_cores = 1;
        memset(&c->x86_capability, 0, sizeof c->x86_capability);
 
        if (!have_cpuid_p()) {
@@ -429,9 +427,8 @@ void __devinit identify_cpu(struct cpuinfo_x86 *c)
        }
 
        /* Init Machine Check Exception if available. */
-#ifdef CONFIG_X86_MCE
        mcheck_init(c);
-#endif
+
        if (c == &boot_cpu_data)
                sysenter_setup();
        enable_sep_cpu();
@@ -446,52 +443,44 @@ void __devinit identify_cpu(struct cpuinfo_x86 *c)
 void __devinit detect_ht(struct cpuinfo_x86 *c)
 {
        u32     eax, ebx, ecx, edx;
-       int     index_msb, tmp;
+       int     index_msb, core_bits;
        int     cpu = smp_processor_id();
 
+       cpuid(1, &eax, &ebx, &ecx, &edx);
+
+       c->apicid = phys_pkg_id((ebx >> 24) & 0xFF, 0);
+
        if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
                return;
 
-       cpuid(1, &eax, &ebx, &ecx, &edx);
        smp_num_siblings = (ebx & 0xff0000) >> 16;
 
        if (smp_num_siblings == 1) {
                printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
        } else if (smp_num_siblings > 1 ) {
-               index_msb = 31;
 
                if (smp_num_siblings > NR_CPUS) {
                        printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
                        smp_num_siblings = 1;
                        return;
                }
-               tmp = smp_num_siblings;
-               while ((tmp & 0x80000000 ) == 0) {
-                       tmp <<=1 ;
-                       index_msb--;
-               }
-               if (smp_num_siblings & (smp_num_siblings - 1))
-                       index_msb++;
+
+               index_msb = get_count_order(smp_num_siblings);
                phys_proc_id[cpu] = phys_pkg_id((ebx >> 24) & 0xFF, index_msb);
 
                printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
                       phys_proc_id[cpu]);
 
-               smp_num_siblings = smp_num_siblings / c->x86_num_cores;
+               smp_num_siblings = smp_num_siblings / c->x86_max_cores;
 
-               tmp = smp_num_siblings;
-               index_msb = 31;
-               while ((tmp & 0x80000000) == 0) {
-                       tmp <<=1 ;
-                       index_msb--;
-               }
+               index_msb = get_count_order(smp_num_siblings) ;
 
-               if (smp_num_siblings & (smp_num_siblings - 1))
-                       index_msb++;
+               core_bits = get_count_order(c->x86_max_cores);
 
-               cpu_core_id[cpu] = phys_pkg_id((ebx >> 24) & 0xFF, index_msb);
+               cpu_core_id[cpu] = phys_pkg_id((ebx >> 24) & 0xFF, index_msb) &
+                                              ((1 << core_bits) - 1);
 
-               if (c->x86_num_cores > 1)
+               if (c->x86_max_cores > 1)
                        printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
                               cpu_core_id[cpu]);
        }
@@ -609,11 +598,6 @@ void __devinit cpu_init(void)
        load_gdt(&cpu_gdt_descr[cpu]);
        load_idt(&idt_descr);
 
-       /*
-        * Delete NT
-        */
-       __asm__("pushfl ; andl $0xffffbfff,(%esp) ; popfl");
-
        /*
         * Set up and load the per-CPU TSS and LDT
         */
@@ -628,8 +612,10 @@ void __devinit cpu_init(void)
        load_TR_desc();
        load_LDT(&init_mm.context);
 
+#ifdef CONFIG_DOUBLEFAULT
        /* Set up doublefault TSS pointer in the GDT */
        __set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss);
+#endif
 
        /* Clear %fs and %gs. */
        asm volatile ("xorl %eax, %eax; movl %eax, %fs; movl %eax, %gs");