x86: make intel_64.c the same as intel.c

No change in functionality intended - this only adds the 32-bit side.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 284 insertions, 17 deletions

diff --git a/arch/x86/kernel/cpu/intel_64.c b/arch/x86/kernel/cpu/intel_64.c
index aef4f2826313..365a008080c2 100644
--- a/arch/x86/kernel/cpu/intel_64.c
+++ b/arch/x86/kernel/cpu/intel_64.c
@@ -1,42 +1,108 @@
 #include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <linux/string.h>
+#include <linux/bitops.h>
 #include <linux/smp.h>
+#include <linux/thread_info.h>
+#include <linux/module.h>
+
 #include <asm/processor.h>
+#include <asm/pgtable.h>
+#include <asm/msr.h>
+#include <asm/uaccess.h>
 #include <asm/ptrace.h>
+#include <asm/ds.h>
+#include <asm/bugs.h>
+
+#ifdef CONFIG_X86_64
 #include <asm/topology.h>
 #include <asm/numa_64.h>
+#endif
 
 #include "cpu.h"
 
+#ifdef CONFIG_X86_LOCAL_APIC
+#include <asm/mpspec.h>
+#include <asm/apic.h>
+#include <mach_apic.h>
+#endif
+
 static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
 {
         if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
-            (c->x86 == 0x6 && c->x86_model >= 0x0e))
+                (c->x86 == 0x6 && c->x86_model >= 0x0e))
                 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
 
+#ifdef CONFIG_X86_64
         set_cpu_cap(c, X86_FEATURE_SYSENTER32);
+#else
+        /* Netburst reports 64 bytes clflush size, but does IO in 128 bytes */
+        if (c->x86 == 15 && c->x86_cache_alignment == 64)
+                c->x86_cache_alignment = 128;
+#endif
 }
 
+#ifdef CONFIG_X86_32
 /*
- * find out the number of processor cores on the die
+ *      Early probe support logic for ppro memory erratum #50
+ *
+ *      This is called before we do cpu ident work
  */
-static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
-{
-        unsigned int eax, t;
 
-        if (c->cpuid_level < 4)
+int __cpuinit ppro_with_ram_bug(void)
+{
+        /* Uses data from early_cpu_detect now */
+        if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
+            boot_cpu_data.x86 == 6 &&
+            boot_cpu_data.x86_model == 1 &&
+            boot_cpu_data.x86_mask < 8) {
+                printk(KERN_INFO "Pentium Pro with Errata#50 detected. Taking evasive action.\n");
                 return 1;
+        }
+        return 0;
+}
 
-        cpuid_count(4, 0, &eax, &t, &t, &t);
 
-        if (eax & 0x1f)
-                return ((eax >> 26) + 1);
-        else
-                return 1;
+/*
+ * P4 Xeon errata 037 workaround.
+ * Hardware prefetcher may cause stale data to be loaded into the cache.
+ */
+static void __cpuinit Intel_errata_workarounds(struct cpuinfo_x86 *c)
+{
+        unsigned long lo, hi;
+
+        if ((c->x86 == 15) && (c->x86_model == 1) && (c->x86_mask == 1)) {
+                rdmsr(MSR_IA32_MISC_ENABLE, lo, hi);
+                if ((lo & (1<<9)) == 0) {
+                        printk (KERN_INFO "CPU: C0 stepping P4 Xeon detected.\n");
+                        printk (KERN_INFO "CPU: Disabling hardware prefetching (Errata 037)\n");
+                        lo |= (1<<9);   /* Disable hw prefetching */
+                        wrmsr (MSR_IA32_MISC_ENABLE, lo, hi);
+                }
+        }
+}
+
+
+
+#ifdef CONFIG_X86_F00F_BUG
+static void __cpuinit trap_init_f00f_bug(void)
+{
+        __set_fixmap(FIX_F00F_IDT, __pa(&idt_table), PAGE_KERNEL_RO);
+
+        /*
+         * Update the IDT descriptor and reload the IDT so that
+         * it uses the read-only mapped virtual address.
+         */
+        idt_descr.address = fix_to_virt(FIX_F00F_IDT);
+        load_idt(&idt_descr);
 }
+#endif
+#endif
 
 static void __cpuinit srat_detect_node(void)
 {
-#ifdef CONFIG_NUMA
+#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
         unsigned node;
         int cpu = smp_processor_id();
         int apicid = hard_smp_processor_id();
@@ -52,11 +118,51 @@ static void __cpuinit srat_detect_node(void)
 #endif
 }
 
+/*
+ * find out the number of processor cores on the die
+ */
+static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
+{
+        unsigned int eax, ebx, ecx, edx;
+
+        if (c->cpuid_level < 4)
+                return 1;
+
+        /* Intel has a non-standard dependency on %ecx for this CPUID level. */
+        cpuid_count(4, 0, &eax, &ebx, &ecx, &edx);
+        if (eax & 0x1f)
+                return ((eax >> 26) + 1);
+        else
+                return 1;
+}
+
 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 {
+        unsigned int l2 = 0;
+        char *p = NULL;
+
         early_init_intel(c);
 
-        init_intel_cacheinfo(c);
+#ifdef CONFIG_X86_F00F_BUG
+        /*
+         * All current models of Pentium and Pentium with MMX technology CPUs
+         * have the F0 0F bug, which lets nonprivileged users lock up the system.
+         * Note that the workaround only should be initialized once...
+         */
+        c->f00f_bug = 0;
+        if (!paravirt_enabled() && c->x86 == 5) {
+                static int f00f_workaround_enabled;
+
+                c->f00f_bug = 1;
+                if (!f00f_workaround_enabled) {
+                        trap_init_f00f_bug();
+                        printk(KERN_NOTICE "Intel Pentium with F0 0F bug - workaround enabled.\n");
+                        f00f_workaround_enabled = 1;
+                }
+        }
+#endif
+
+        l2 = init_intel_cacheinfo(c);
         if (c->cpuid_level > 9) {
                 unsigned eax = cpuid_eax(10);
                 /* Check for version and the number of counters */
@@ -64,8 +170,70 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
                         set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
         }
 
+#ifdef CONFIG_X86_32
+        /* SEP CPUID bug: Pentium Pro reports SEP but doesn't have it until model 3 mask 3 */
+        if ((c->x86<<8 | c->x86_model<<4 | c->x86_mask) < 0x633)
+                clear_cpu_cap(c, X86_FEATURE_SEP);
+
+        /*
+         * Names for the Pentium II/Celeron processors
+         * detectable only by also checking the cache size.
+         * Dixon is NOT a Celeron.
+         */
+        if (c->x86 == 6) {
+                switch (c->x86_model) {
+                case 5:
+                        if (c->x86_mask == 0) {
+                                if (l2 == 0)
+                                        p = "Celeron (Covington)";
+                                else if (l2 == 256)
+                                        p = "Mobile Pentium II (Dixon)";
+                        }
+                        break;
+
+                case 6:
+                        if (l2 == 128)
+                                p = "Celeron (Mendocino)";
+                        else if (c->x86_mask == 0 || c->x86_mask == 5)
+                                p = "Celeron-A";
+                        break;
+
+                case 8:
+                        if (l2 == 128)
+                                p = "Celeron (Coppermine)";
+                        break;
+                }
+        }
+
+        if (p)
+                strcpy(c->x86_model_id, p);
+
+        Intel_errata_workarounds(c);
+
+#ifdef CONFIG_X86_INTEL_USERCOPY
+        /*
+         * Set up the preferred alignment for movsl bulk memory moves
+         */
+        switch (c->x86) {
+        case 4:         /* 486: untested */
+                break;
+        case 5:         /* Old Pentia: untested */
+                break;
+        case 6:         /* PII/PIII only like movsl with 8-byte alignment */
+                movsl_mask.mask = 7;
+                break;
+        case 15:        /* P4 is OK down to 8-byte alignment */
+                movsl_mask.mask = 7;
+                break;
+        }
+#endif
+
+#endif
+
+        if (cpu_has_xmm2)
+                set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
         if (cpu_has_ds) {
-                unsigned int l1, l2;
+                unsigned int l1;
                 rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
                 if (!(l1 & (1<<11)))
                         set_cpu_cap(c, X86_FEATURE_BTS);
@@ -74,26 +242,125 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
                 ds_init_intel(c);
         }
 
+#ifdef CONFIG_X86_64
         if (c->x86 == 15)
                 c->x86_cache_alignment = c->x86_clflush_size * 2;
         if (c->x86 == 6)
                 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
-        if (cpu_has_xmm2)
-                set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
+#else
+        if (c->x86 == 15)
+                set_cpu_cap(c, X86_FEATURE_P4);
+        if (c->x86 == 6)
+                set_cpu_cap(c, X86_FEATURE_P3);
+
+        if (cpu_has_bts)
+                ptrace_bts_init_intel(c);
+
+        /*
+         * See if we have a good local APIC by checking for buggy Pentia,
+         * i.e. all B steppings and the C2 stepping of P54C when using their
+         * integrated APIC (see 11AP erratum in "Pentium Processor
+         * Specification Update").
+         */
+        if (cpu_has_apic && (c->x86<<8 | c->x86_model<<4) == 0x520 &&
+            (c->x86_mask < 0x6 || c->x86_mask == 0xb))
+                set_cpu_cap(c, X86_FEATURE_11AP);
+
+#ifdef CONFIG_X86_NUMAQ
+        numaq_tsc_disable();
+#endif
+#endif
 
         detect_extended_topology(c);
-        if (!cpu_has(c, X86_FEATURE_XTOPOLOGY))
+        if (!cpu_has(c, X86_FEATURE_XTOPOLOGY)) {
+                /*
+                 * let's use the legacy cpuid vector 0x1 and 0x4 for topology
+                 * detection.
+                 */
                 c->x86_max_cores = intel_num_cpu_cores(c);
+#ifdef CONFIG_X86_32
+                detect_ht(c);
+#endif
+        }
 
+        /* Work around errata */
         srat_detect_node();
 }
 
+#ifdef CONFIG_X86_32
+static unsigned int __cpuinit intel_size_cache(struct cpuinfo_x86 *c, unsigned int size)
+{
+        /*
+         * Intel PIII Tualatin. This comes in two flavours.
+         * One has 256kb of cache, the other 512. We have no way
+         * to determine which, so we use a boottime override
+         * for the 512kb model, and assume 256 otherwise.
+         */
+        if ((c->x86 == 6) && (c->x86_model == 11) && (size == 0))
+                size = 256;
+        return size;
+}
+#endif
+
 static struct cpu_dev intel_cpu_dev __cpuinitdata = {
         .c_vendor       = "Intel",
         .c_ident        = { "GenuineIntel" },
+#ifdef CONFIG_X86_32
+        .c_models = {
+                { .vendor = X86_VENDOR_INTEL, .family = 4, .model_names =
+                  {
+                          [0] = "486 DX-25/33",
+                          [1] = "486 DX-50",
+                          [2] = "486 SX",
+                          [3] = "486 DX/2",
+                          [4] = "486 SL",
+                          [5] = "486 SX/2",
+                          [7] = "486 DX/2-WB",
+                          [8] = "486 DX/4",
+                          [9] = "486 DX/4-WB"
+                  }
+                },
+                { .vendor = X86_VENDOR_INTEL, .family = 5, .model_names =
+                  {
+                          [0] = "Pentium 60/66 A-step",
+                          [1] = "Pentium 60/66",
+                          [2] = "Pentium 75 - 200",
+                          [3] = "OverDrive PODP5V83",
+                          [4] = "Pentium MMX",
+                          [7] = "Mobile Pentium 75 - 200",
+                          [8] = "Mobile Pentium MMX"
+                  }
+                },
+                { .vendor = X86_VENDOR_INTEL, .family = 6, .model_names =
+                  {
+                          [0] = "Pentium Pro A-step",
+                          [1] = "Pentium Pro",
+                          [3] = "Pentium II (Klamath)",
+                          [4] = "Pentium II (Deschutes)",
+                          [5] = "Pentium II (Deschutes)",
+                          [6] = "Mobile Pentium II",
+                          [7] = "Pentium III (Katmai)",
+                          [8] = "Pentium III (Coppermine)",
+                          [10] = "Pentium III (Cascades)",
+                          [11] = "Pentium III (Tualatin)",
+                  }
+                },
+                { .vendor = X86_VENDOR_INTEL, .family = 15, .model_names =
+                  {
+                          [0] = "Pentium 4 (Unknown)",
+                          [1] = "Pentium 4 (Willamette)",
+                          [2] = "Pentium 4 (Northwood)",
+                          [4] = "Pentium 4 (Foster)",
+                          [5] = "Pentium 4 (Foster)",
+                  }
+                },
+        },
+        .c_size_cache   = intel_size_cache,
+#endif
         .c_early_init   = early_init_intel,
         .c_init         = init_intel,
         .c_x86_vendor   = X86_VENDOR_INTEL,
 };
 
 cpu_dev_register(intel_cpu_dev);
+