1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef _PPC_BOOT_REG_H
3#define _PPC_BOOT_REG_H
4/*
5 * Copyright 2007 Davud Gibson, IBM Corporation.
6 */
7
8static inline u32 mfpvr(void)
9{
10 u32 pvr;
11 asm volatile ("mfpvr %0" : "=r"(pvr));
12 return pvr;
13}
14
15#define __stringify_1(x) #x
16#define __stringify(x) __stringify_1(x)
17
18#define mfspr(rn) ({unsigned long rval; \
19 asm volatile("mfspr %0," __stringify(rn) \
20 : "=r" (rval)); rval; })
21#define mtspr(rn, v) asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v))
22
23register void *__stack_pointer asm("r1");
24#define get_sp() (__stack_pointer)
25
26#endif /* _PPC_BOOT_REG_H */
27

source code of linux/arch/powerpc/boot/reg.h