u-boot-brain/arch/m68k/include/asm/processor.h

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#ifndef __ASM_M68K_PROCESSOR_H
#define __ASM_M68K_PROCESSOR_H
#include <asm/ptrace.h>
#include <asm/types.h>
#define _GLOBAL(n)\
.globl n;\
n:
/* Macros for setting and retrieving special purpose registers */
#define setvbr(v) asm volatile("movec %0,%%VBR" : : "r" (v))
#endif /* __ASM_M68K_PROCESSOR_H */