38 lines
1.0 KiB
C
38 lines
1.0 KiB
C
#ifndef __ARCH_S390_PERCPU__
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#define __ARCH_S390_PERCPU__
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#include <linux/compiler.h>
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#include <asm/lowcore.h>
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/*
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* s390 uses its own implementation for per cpu data, the offset of
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* the cpu local data area is cached in the cpu's lowcore memory.
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* For 64 bit module code s390 forces the use of a GOT slot for the
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* address of the per cpu variable. This is needed because the module
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* may be more than 4G above the per cpu area.
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*/
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#if defined(__s390x__) && defined(MODULE)
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#define SHIFT_PERCPU_PTR(ptr,offset) (({ \
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extern int simple_identifier_##var(void); \
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unsigned long *__ptr; \
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asm ( "larl %0, %1@GOTENT" \
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: "=a" (__ptr) : "X" (ptr) ); \
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(typeof(ptr))((*__ptr) + (offset)); }))
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#else
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#define SHIFT_PERCPU_PTR(ptr, offset) (({ \
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extern int simple_identifier_##var(void); \
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unsigned long __ptr; \
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asm ( "" : "=a" (__ptr) : "0" (ptr) ); \
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(typeof(ptr)) (__ptr + (offset)); }))
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#endif
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#define __my_cpu_offset S390_lowcore.percpu_offset
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#include <asm-generic/percpu.h>
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#endif /* __ARCH_S390_PERCPU__ */
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