From c6557e7f2b6ae76a44653d38f835174074c42e05 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Fri, 1 Aug 2008 20:42:05 +0200 Subject: [S390] move include/asm-s390 to arch/s390/include/asm Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/percpu.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 arch/s390/include/asm/percpu.h (limited to 'arch/s390/include/asm/percpu.h') diff --git a/arch/s390/include/asm/percpu.h b/arch/s390/include/asm/percpu.h new file mode 100644 index 000000000000..408d60b4f75b --- /dev/null +++ b/arch/s390/include/asm/percpu.h @@ -0,0 +1,37 @@ +#ifndef __ARCH_S390_PERCPU__ +#define __ARCH_S390_PERCPU__ + +#include +#include + +/* + * s390 uses its own implementation for per cpu data, the offset of + * the cpu local data area is cached in the cpu's lowcore memory. + * For 64 bit module code s390 forces the use of a GOT slot for the + * address of the per cpu variable. This is needed because the module + * may be more than 4G above the per cpu area. + */ +#if defined(__s390x__) && defined(MODULE) + +#define SHIFT_PERCPU_PTR(ptr,offset) (({ \ + extern int simple_identifier_##var(void); \ + unsigned long *__ptr; \ + asm ( "larl %0, %1@GOTENT" \ + : "=a" (__ptr) : "X" (ptr) ); \ + (typeof(ptr))((*__ptr) + (offset)); })) + +#else + +#define SHIFT_PERCPU_PTR(ptr, offset) (({ \ + extern int simple_identifier_##var(void); \ + unsigned long __ptr; \ + asm ( "" : "=a" (__ptr) : "0" (ptr) ); \ + (typeof(ptr)) (__ptr + (offset)); })) + +#endif + +#define __my_cpu_offset S390_lowcore.percpu_offset + +#include + +#endif /* __ARCH_S390_PERCPU__ */ -- cgit v1.2.3