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 
mfpvr(void)8 static 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 
23 register void *__stack_pointer asm("r1");
24 #define get_sp()	(__stack_pointer)
25 
26 #endif	/* _PPC_BOOT_REG_H */
27