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>

1 files changed, 69 insertions, 0 deletions

diff --git a/include/asm-x86/system.h b/include/asm-x86/system.h
index 692562b48f2..d0803f8c70c 100644
--- a/include/asm-x86/system.h
+++ b/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