x86: put together equal pieces of system.h

This patch puts together pieces of system_{32,64}.h that
looks like the same. It's the first step towards integration
of this file.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/process_64.c

@@ -99,7 +99,7 @@ void exit_idle(void)
  * We use this if we don't have any better
  * idle routine..
  */
-static void default_idle(void)
+void default_idle(void)
 {
 	current_thread_info()->status &= ~TS_POLLING;
 	/*

include/asm-x86/system.h

@@ -1,5 +1,74 @@
+#ifndef _ASM_X86_SYSTEM_H_
+#define _ASM_X86_SYSTEM_H_
+
+#include <asm/asm.h>
+
 #ifdef CONFIG_X86_32
 # include "system_32.h"
 #else
 # include "system_64.h"
 #endif
+
+#ifdef __KERNEL__
+#define _set_base(addr, base) do { unsigned long __pr; \
+__asm__ __volatile__ ("movw %%dx,%1\n\t" \
+	"rorl $16,%%edx\n\t" \
+	"movb %%dl,%2\n\t" \
+	"movb %%dh,%3" \
+	:"=&d" (__pr) \
+	:"m" (*((addr)+2)), \
+	 "m" (*((addr)+4)), \
+	 "m" (*((addr)+7)), \
+	 "0" (base) \
+	); } while (0)
+
+#define _set_limit(addr, limit) do { unsigned long __lr; \
+__asm__ __volatile__ ("movw %%dx,%1\n\t" \
+	"rorl $16,%%edx\n\t" \
+	"movb %2,%%dh\n\t" \
+	"andb $0xf0,%%dh\n\t" \
+	"orb %%dh,%%dl\n\t" \
+	"movb %%dl,%2" \
+	:"=&d" (__lr) \
+	:"m" (*(addr)), \
+	 "m" (*((addr)+6)), \
+	 "0" (limit) \
+	); } while (0)
+
+#define set_base(ldt, base) _set_base(((char *)&(ldt)) , (base))
+#define set_limit(ldt, limit) _set_limit(((char *)&(ldt)) , ((limit)-1))
+
+/*
+ * Save a segment register away
+ */
+#define savesegment(seg, value) \
+	asm volatile("mov %%" #seg ",%0":"=rm" (value))
+
+static inline unsigned long get_limit(unsigned long segment)
+{
+	unsigned long __limit;
+	__asm__("lsll %1,%0"
+		:"=r" (__limit):"r" (segment));
+	return __limit+1;
+}
+#endif /* __KERNEL__ */
+
+static inline void clflush(void *__p)
+{
+	asm volatile("clflush %0" : "+m" (*(char __force *)__p));
+}
+
+#define nop() __asm__ __volatile__ ("nop")
+
+void disable_hlt(void);
+void enable_hlt(void);
+
+extern int es7000_plat;
+void cpu_idle_wait(void);
+
+extern unsigned long arch_align_stack(unsigned long sp);
+extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
+
+void default_idle(void);
+
+#endif

include/asm-x86/system_32.h

@@ -34,34 +34,6 @@ extern struct task_struct * FASTCALL(__switch_to(struct task_struct *prev, struc
 		      "2" (prev), "d" (next));				\
 } while (0)
 
-#define _set_base(addr,base) do { unsigned long __pr; \
-__asm__ __volatile__ ("movw %%dx,%1\n\t" \
-	"rorl $16,%%edx\n\t" \
-	"movb %%dl,%2\n\t" \
-	"movb %%dh,%3" \
-	:"=&d" (__pr) \
-	:"m" (*((addr)+2)), \
-	 "m" (*((addr)+4)), \
-	 "m" (*((addr)+7)), \
-         "0" (base) \
-        ); } while(0)
-
-#define _set_limit(addr,limit) do { unsigned long __lr; \
-__asm__ __volatile__ ("movw %%dx,%1\n\t" \
-	"rorl $16,%%edx\n\t" \
-	"movb %2,%%dh\n\t" \
-	"andb $0xf0,%%dh\n\t" \
-	"orb %%dh,%%dl\n\t" \
-	"movb %%dl,%2" \
-	:"=&d" (__lr) \
-	:"m" (*(addr)), \
-	 "m" (*((addr)+6)), \
-	 "0" (limit) \
-        ); } while(0)
-
-#define set_base(ldt,base) _set_base( ((char *)&(ldt)) , (base) )
-#define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , ((limit)-1) )
-
 /*
  * Load a segment. Fall back on loading the zero
  * segment if something goes wrong..
@@ -83,12 +55,6 @@ __asm__ __volatile__ ("movw %%dx,%1\n\t" \
 		".previous"			\
 		: :"rm" (value))
 
-/*
- * Save a segment register away
- */
-#define savesegment(seg, value) \
-	asm volatile("mov %%" #seg ",%0":"=rm" (value))
-
 
 static inline void native_clts(void)
 {
@@ -161,11 +127,6 @@ static inline void native_wbinvd(void)
 	asm volatile("wbinvd": : :"memory");
 }
 
-static inline void clflush(void *__p)
-{
-	asm volatile("clflush %0" : "+m" (*(char __force *)__p));
-}
-
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
@@ -190,15 +151,6 @@ static inline void clflush(void *__p)
 
 #endif	/* __KERNEL__ */
 
-static inline unsigned long get_limit(unsigned long segment)
-{
-	unsigned long __limit;
-	__asm__("lsll %1,%0"
-		:"=r" (__limit):"r" (segment));
-	return __limit+1;
-}
-
-#define nop() __asm__ __volatile__ ("nop")
 
 /*
  * Force strict CPU ordering.
@@ -305,15 +257,5 @@ static inline unsigned long get_limit(unsigned long segment)
  * disable hlt during certain critical i/o operations
  */
 #define HAVE_DISABLE_HLT
-void disable_hlt(void);
-void enable_hlt(void);
-
-extern int es7000_plat;
-void cpu_idle_wait(void);
-
-extern unsigned long arch_align_stack(unsigned long sp);
-extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
-
-void default_idle(void);
 
 #endif

include/asm-x86/system_64.h

@@ -141,13 +141,6 @@ static inline void write_cr8(unsigned long val)
 
 #endif	/* __KERNEL__ */
 
-static inline void clflush(volatile void *__p)
-{
-	asm volatile("clflush %0" : "+m" (*(char __force *)__p));
-}
-
-#define nop() __asm__ __volatile__ ("nop")
-
 #ifdef CONFIG_SMP
 #define smp_mb()	mb()
 #define smp_rmb()	barrier()
@@ -177,9 +170,4 @@ static inline void clflush(volatile void *__p)
 
 #include <linux/irqflags.h>
 
-void cpu_idle_wait(void);
-
-extern unsigned long arch_align_stack(unsigned long sp);
-extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
-
 #endif