linux/arch/powerpc/boot/reg.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _PPC_BOOT_REG_H
#define _PPC_BOOT_REG_H
/*
 * Copyright 2007 Davud Gibson, IBM Corporation.
 */

static inline u32 mfpvr(void)
{
	u32 pvr;
	asm volatile ("mfpvr	%0" : "=r"(pvr));
	return pvr;
}

#define __stringify_1(x)	#x
#define __stringify(x)		__stringify_1(x)

#define mfspr(rn)	({unsigned long rval; \
			asm volatile("mfspr %0," __stringify(rn) \
				: "=r" (rval)); rval; })
#define mtspr(rn, v)	asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v))

register void *__stack_pointer asm("r1");
#define get_sp()	(__stack_pointer)

#endif	/* _PPC_BOOT_REG_H */