X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fi386%2Fkernel%2Fhead.S;h=95fe2fdf466056b81540e42208f483bfebb2d33a;hb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;hp=f7867f4b8e6f7ea6dbf8aaa49c3f456c92fbf94a;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S
index f7867f4b8..95fe2fdf4 100644
--- a/arch/i386/kernel/head.S
+++ b/arch/i386/kernel/head.S
@@ -24,15 +24,14 @@
  * References to members of the new_cpu_data structure.
  */
 
-#define CPU_PARAMS	new_cpu_data
-#define X86		CPU_PARAMS+0
-#define X86_VENDOR	CPU_PARAMS+1
-#define X86_MODEL	CPU_PARAMS+2
-#define X86_MASK	CPU_PARAMS+3
-#define X86_HARD_MATH	CPU_PARAMS+6
-#define X86_CPUID	CPU_PARAMS+8
-#define X86_CAPABILITY	CPU_PARAMS+12
-#define X86_VENDOR_ID	CPU_PARAMS+36	/* offset dependent on NCAPINTS */
+#define X86		new_cpu_data+CPUINFO_x86
+#define X86_VENDOR	new_cpu_data+CPUINFO_x86_vendor
+#define X86_MODEL	new_cpu_data+CPUINFO_x86_model
+#define X86_MASK	new_cpu_data+CPUINFO_x86_mask
+#define X86_HARD_MATH	new_cpu_data+CPUINFO_hard_math
+#define X86_CPUID	new_cpu_data+CPUINFO_cpuid_level
+#define X86_CAPABILITY	new_cpu_data+CPUINFO_x86_capability
+#define X86_VENDOR_ID	new_cpu_data+CPUINFO_x86_vendor_id
 
 /*
  * This is how much memory *in addition to the memory covered up to
@@ -154,6 +153,32 @@ ENTRY(startup_32_smp)
 	orl %edx,%eax
 	movl %eax,%cr4
 
+	btl $5, %eax		# check if PAE is enabled
+	jnc 6f
+
+	/* Check if extended functions are implemented */
+	movl $0x80000000, %eax
+	cpuid
+	cmpl $0x80000000, %eax
+	jbe 6f
+	mov $0x80000001, %eax
+	cpuid
+	/* Execute Disable bit supported? */
+	btl $20, %edx
+	jnc 6f
+
+	/* Setup EFER (Extended Feature Enable Register) */
+	movl $0xc0000080, %ecx
+	rdmsr
+
+	btsl $11, %eax
+	/* Make changes effective */
+	wrmsr
+
+6:
+	/* cpuid clobbered ebx, set it up again: */
+	xorl %ebx,%ebx
+	incl %ebx
 3:
 #endif /* CONFIG_SMP */
 
@@ -496,6 +521,3 @@ ENTRY(cpu_gdt_table)
 	.quad 0x0000000000000000	/* 0xf0 - unused */
 	.quad 0x0000000000000000	/* 0xf8 - GDT entry 31: double-fault TSS */
 
-#ifdef CONFIG_SMP
-	.fill (NR_CPUS-1)*GDT_ENTRIES,8,0 /* other CPU's GDT */
-#endif