1 files changed, 63 insertions, 32 deletions

diff --git a/include/asm-i386/desc.h b/include/asm-i386/desc.h
index 050831f34f7..c547403f341 100644
--- a/include/asm-i386/desc.h
+++ b/include/asm-i386/desc.h
@@ -12,23 +12,24 @@
 
 #include <asm/mmu.h>
 
-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
-
 struct Xgt_desc_struct {
 	unsigned short size;
 	unsigned long address __attribute__((packed));
 	unsigned short pad;
 } __attribute__ ((packed));
 
-extern struct Xgt_desc_struct idt_descr;
-DECLARE_PER_CPU(struct Xgt_desc_struct, cpu_gdt_descr);
-extern struct Xgt_desc_struct early_gdt_descr;
+struct gdt_page
+{
+	struct desc_struct gdt[GDT_ENTRIES];
+} __attribute__((aligned(PAGE_SIZE)));
+DECLARE_PER_CPU(struct gdt_page, gdt_page);
 
 static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 {
-	return (struct desc_struct *)per_cpu(cpu_gdt_descr, cpu).address;
+	return per_cpu(gdt_page, cpu).gdt;
 }
 
+extern struct Xgt_desc_struct idt_descr;
 extern struct desc_struct idt_table[];
 extern void set_intr_gate(unsigned int irq, void * addr);
 
@@ -58,45 +59,33 @@ static inline void pack_gate(__u32 *a, __u32 *b,
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
-#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8))
-
-#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"m" (*dtr))
-#define load_idt(dtr) __asm__ __volatile("lidt %0"::"m" (*dtr))
+#define load_TR_desc() native_load_tr_desc()
+#define load_gdt(dtr) native_load_gdt(dtr)
+#define load_idt(dtr) native_load_idt(dtr)
 #define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
 #define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
 
-#define store_gdt(dtr) __asm__ ("sgdt %0":"=m" (*dtr))
-#define store_idt(dtr) __asm__ ("sidt %0":"=m" (*dtr))
-#define store_tr(tr) __asm__ ("str %0":"=m" (tr))
+#define store_gdt(dtr) native_store_gdt(dtr)
+#define store_idt(dtr) native_store_idt(dtr)
+#define store_tr(tr) (tr = native_store_tr())
 #define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
 
-#if TLS_SIZE != 24
-# error update this code.
-#endif
-
-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
-{
-#define C(i) get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i]
-	C(0); C(1); C(2);
-#undef C
-}
+#define load_TLS(t, cpu) native_load_tls(t, cpu)
+#define set_ldt native_set_ldt
 
 #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
 #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
 #define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+#endif
 
-static inline void write_dt_entry(void *dt, int entry, __u32 entry_a, __u32 entry_b)
+static inline void write_dt_entry(struct desc_struct *dt,
+				  int entry, u32 entry_low, u32 entry_high)
 {
-	__u32 *lp = (__u32 *)((char *)dt + entry*8);
-	*lp = entry_a;
-	*(lp+1) = entry_b;
+	dt[entry].a = entry_low;
+	dt[entry].b = entry_high;
 }
 
-#define set_ldt native_set_ldt
-#endif /* CONFIG_PARAVIRT */
-
-static inline fastcall void native_set_ldt(const void *addr,
-					   unsigned int entries)
+static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
 	if (likely(entries == 0))
 		__asm__ __volatile__("lldt %w0"::"q" (0));
@@ -112,6 +101,48 @@ static inline fastcall void native_set_ldt(const void *addr,
 	}
 }
 
+
+static inline void native_load_tr_desc(void)
+{
+	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
+}
+
+static inline void native_load_gdt(const struct Xgt_desc_struct *dtr)
+{
+	asm volatile("lgdt %0"::"m" (*dtr));
+}
+
+static inline void native_load_idt(const struct Xgt_desc_struct *dtr)
+{
+	asm volatile("lidt %0"::"m" (*dtr));
+}
+
+static inline void native_store_gdt(struct Xgt_desc_struct *dtr)
+{
+	asm ("sgdt %0":"=m" (*dtr));
+}
+
+static inline void native_store_idt(struct Xgt_desc_struct *dtr)
+{
+	asm ("sidt %0":"=m" (*dtr));
+}
+
+static inline unsigned long native_store_tr(void)
+{
+	unsigned long tr;
+	asm ("str %0":"=r" (tr));
+	return tr;
+}
+
+static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
+{
+	unsigned int i;
+	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+
+	for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+		gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
+}
+
 static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
 {
 	__u32 a, b;