x86: make 64-bit identify_cpu use cpu_dev

we may need to move some functions to common.c later

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

5 files changed, 95 insertions, 55 deletions

diff --git a/arch/x86/kernel/cpu/amd_64.c b/arch/x86/kernel/cpu/amd_64.c
index 250bfe6064af..30b7557c9641 100644
--- a/arch/x86/kernel/cpu/amd_64.c
+++ b/arch/x86/kernel/cpu/amd_64.c
@@ -7,8 +7,7 @@
 
 #include <mach_apic.h>
 
-extern int __cpuinit get_model_name(struct cpuinfo_x86 *c);
-extern void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c);
+#include "cpu.h"
 
 int force_mwait __cpuinitdata;
 
@@ -109,7 +108,7 @@ static void __cpuinit early_init_amd_mc(struct cpuinfo_x86 *c)
 #endif
 }
 
-void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
+static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
 {
         early_init_amd_mc(c);
 
@@ -118,7 +117,7 @@ void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
                 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
 }
 
-void __cpuinit init_amd(struct cpuinfo_x86 *c)
+static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 {
         unsigned level;
 
@@ -200,3 +199,13 @@ void __cpuinit init_amd(struct cpuinfo_x86 *c)
                         set_memory_4k((unsigned long)__va(tseg), 1);
         }
 }
+
+static struct cpu_dev amd_cpu_dev __cpuinitdata = {
+        .c_vendor       = "AMD",
+        .c_ident        = { "AuthenticAMD" },
+        .c_early_init   = early_init_amd,
+        .c_init         = init_amd,
+};
+
+cpu_vendor_dev_register(X86_VENDOR_AMD, &amd_cpu_dev);
+
diff --git a/arch/x86/kernel/cpu/centaur_64.c b/arch/x86/kernel/cpu/centaur_64.c
index bac96d187d05..13526fd5cce1 100644
--- a/arch/x86/kernel/cpu/centaur_64.c
+++ b/arch/x86/kernel/cpu/centaur_64.c
@@ -4,13 +4,15 @@
 #include <asm/cpufeature.h>
 #include <asm/processor.h>
 
-void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
+#include "cpu.h"
+
+static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
 {
         if (c->x86 == 0x6 && c->x86_model >= 0xf)
                 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
 }
 
-void __cpuinit init_centaur(struct cpuinfo_x86 *c)
+static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
 {
         /* Cache sizes */
         unsigned n;
@@ -29,3 +31,13 @@ void __cpuinit init_centaur(struct cpuinfo_x86 *c)
         }
         set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
 }
+
+static struct cpu_dev centaur_cpu_dev __cpuinitdata = {
+        .c_vendor       = "Centaur",
+        .c_ident        = { "CentaurHauls" },
+        .c_early_init   = early_init_centaur,
+        .c_init         = init_centaur,
+};
+
+cpu_vendor_dev_register(X86_VENDOR_CENTAUR, &centaur_cpu_dev);
+
diff --git a/arch/x86/kernel/cpu/cpu.h b/arch/x86/kernel/cpu/cpu.h
index 40ad1893fe87..4d894e8565fe 100644
--- a/arch/x86/kernel/cpu/cpu.h
+++ b/arch/x86/kernel/cpu/cpu.h
@@ -1,4 +1,6 @@
-#ifdef CONFIG_X86_32
+#ifndef ARCH_X86_CPU_H
+
+#define ARCH_X86_CPU_H
 
 struct cpu_model_info {
         int vendor;
@@ -38,4 +40,4 @@ extern struct cpu_vendor_dev __x86cpuvendor_start[], __x86cpuvendor_end[];
 extern int get_model_name(struct cpuinfo_x86 *c);
 extern void display_cacheinfo(struct cpuinfo_x86 *c);
 
-#endif /* CONFIG_X86_32 */
+#endif
diff --git a/arch/x86/kernel/cpu/intel_64.c b/arch/x86/kernel/cpu/intel_64.c
index b33912199484..fcb1cc9d75ca 100644
--- a/arch/x86/kernel/cpu/intel_64.c
+++ b/arch/x86/kernel/cpu/intel_64.c
@@ -5,7 +5,9 @@
 #include <asm/topology.h>
 #include <asm/numa_64.h>
 
-void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
+#include "cpu.h"
+
+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))
@@ -48,7 +50,7 @@ static void __cpuinit srat_detect_node(void)
 #endif
 }
 
-void __cpuinit init_intel(struct cpuinfo_x86 *c)
+static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 {
         /* Cache sizes */
         unsigned n;
@@ -90,3 +92,12 @@ void __cpuinit init_intel(struct cpuinfo_x86 *c)
 
         srat_detect_node();
 }
+
+static struct cpu_dev intel_cpu_dev __cpuinitdata = {
+        .c_vendor       = "Intel",
+        .c_ident        = { "GenuineIntel" },
+        .c_early_init   = early_init_intel,
+        .c_init         = init_intel,
+};
+cpu_vendor_dev_register(X86_VENDOR_INTEL, &intel_cpu_dev);
+
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 25afdd80a3cf..0cebf953c25a 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -80,6 +80,8 @@
 #define ARCH_SETUP
 #endif
 
+#include "cpu/cpu.h"
+
 /*
  * Machine setup..
  */
@@ -163,6 +165,7 @@ static struct resource bss_resource = {
         .flags = IORESOURCE_RAM,
 };
 
+static void __init early_cpu_init(void);
 static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c);
 
 #ifdef CONFIG_PROC_VMCORE
@@ -339,6 +342,7 @@ void __init setup_arch(char **cmdline_p)
         bss_resource.start = virt_to_phys(&__bss_start);
         bss_resource.end = virt_to_phys(&__bss_stop)-1;
 
+        early_cpu_init();
         early_identify_cpu(&boot_cpu_data);
 
         strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
@@ -524,6 +528,19 @@ void __init setup_arch(char **cmdline_p)
         check_enable_amd_mmconf_dmi();
 }
 
+struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
+
+static void __cpuinit default_init(struct cpuinfo_x86 *c)
+{
+        display_cacheinfo(c);
+}
+
+static struct cpu_dev __cpuinitdata default_cpu = {
+        .c_init = default_init,
+        .c_vendor = "Unknown",
+};
+static struct cpu_dev *this_cpu __cpuinitdata = &default_cpu;
+
 int __cpuinit get_model_name(struct cpuinfo_x86 *c)
 {
         unsigned int *v;
@@ -625,24 +642,37 @@ out:
 static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
 {
         char *v = c->x86_vendor_id;
-
-        if (!strcmp(v, "AuthenticAMD"))
-                c->x86_vendor = X86_VENDOR_AMD;
-        else if (!strcmp(v, "GenuineIntel"))
-                c->x86_vendor = X86_VENDOR_INTEL;
-        else if (!strcmp(v, "CentaurHauls"))
-                c->x86_vendor = X86_VENDOR_CENTAUR;
-        else
-                c->x86_vendor = X86_VENDOR_UNKNOWN;
+        int i;
+        static int printed;
+
+        for (i = 0; i < X86_VENDOR_NUM; i++) {
+                if (cpu_devs[i]) {
+                        if (!strcmp(v, cpu_devs[i]->c_ident[0]) ||
+                            (cpu_devs[i]->c_ident[1] &&
+                            !strcmp(v, cpu_devs[i]->c_ident[1]))) {
+                                c->x86_vendor = i;
+                                this_cpu = cpu_devs[i];
+                                return;
+                        }
+                }
+        }
+        if (!printed) {
+                printed++;
+                printk(KERN_ERR "CPU: Vendor unknown, using generic init.\n");
+                printk(KERN_ERR "CPU: Your system may be unstable.\n");
+        }
+        c->x86_vendor = X86_VENDOR_UNKNOWN;
 }
 
-// FIXME: Needs to use cpu_vendor_dev_register
-extern void __cpuinit early_init_amd(struct cpuinfo_x86 *c);
-extern void __cpuinit init_amd(struct cpuinfo_x86 *c);
-extern void __cpuinit early_init_intel(struct cpuinfo_x86 *c);
-extern void __cpuinit init_intel(struct cpuinfo_x86 *c);
-extern void __cpuinit early_init_centaur(struct cpuinfo_x86 *c);
-extern void __cpuinit init_centaur(struct cpuinfo_x86 *c);
+static void __init early_cpu_init(void)
+{
+        struct cpu_vendor_dev *cvdev;
+
+        for (cvdev = __x86cpuvendor_start ;
+             cvdev < __x86cpuvendor_end   ;
+             cvdev++)
+                cpu_devs[cvdev->vendor] = cvdev->cpu_dev;
+}
 
 /* Do some early cpuid on the boot CPU to get some parameter that are
    needed before check_bugs. Everything advanced is in identify_cpu
@@ -722,17 +752,9 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
         if (c->extended_cpuid_level >= 0x80000007)
                 c->x86_power = cpuid_edx(0x80000007);
 
-        switch (c->x86_vendor) {
-        case X86_VENDOR_AMD:
-                early_init_amd(c);
-                break;
-        case X86_VENDOR_INTEL:
-                early_init_intel(c);
-                break;
-        case X86_VENDOR_CENTAUR:
-                early_init_centaur(c);
-                break;
-        }
+        if (c->x86_vendor != X86_VENDOR_UNKNOWN &&
+            cpu_devs[c->x86_vendor]->c_early_init)
+                cpu_devs[c->x86_vendor]->c_early_init(c);
 
         validate_pat_support(c);
 }
@@ -760,24 +782,8 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
          * At the end of this section, c->x86_capability better
          * indicate the features this CPU genuinely supports!
          */
-        switch (c->x86_vendor) {
-        case X86_VENDOR_AMD:
-                init_amd(c);
-                break;
-
-        case X86_VENDOR_INTEL:
-                init_intel(c);
-                break;
-
-        case X86_VENDOR_CENTAUR:
-                init_centaur(c);
-                break;
-
-        case X86_VENDOR_UNKNOWN:
-        default:
-                display_cacheinfo(c);
-                break;
-        }
+        if (this_cpu->c_init)
+                this_cpu->c_init(c);
 
         detect_ht(c);