From a6b4655258efd39b590e519815ed43bb74cd7188 Mon Sep 17 00:00:00 2001 From: Glauber de Oliveira Costa Date: Wed, 30 Jan 2008 13:31:08 +0100 Subject: x86: unify load_segment macro This patch unifies the load_segment() macro, making them equal in both x86_64 and i386 architectures. The common version goes to system.h, and the old are deleted. Signed-off-by: Glauber de Oliveira Costa Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- include/asm-x86/system.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'include/asm-x86/system.h') diff --git a/include/asm-x86/system.h b/include/asm-x86/system.h index d0803f8c70c..3740bada097 100644 --- a/include/asm-x86/system.h +++ b/include/asm-x86/system.h @@ -38,6 +38,27 @@ __asm__ __volatile__ ("movw %%dx,%1\n\t" \ #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.. + */ +#define loadsegment(seg, value) \ + asm volatile("\n" \ + "1:\t" \ + "movl %k0,%%" #seg "\n" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:\t" \ + "movl %k1, %%" #seg "\n\t" \ + "jmp 2b\n" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n\t" \ + _ASM_ALIGN "\n\t" \ + _ASM_PTR " 1b,3b\n" \ + ".previous" \ + : :"r" (value), "r" (0)) + + /* * Save a segment register away */ -- cgit v1.2.3