xref: /openbmc/linux/arch/powerpc/boot/reg.h (revision 293d5b43)
1 #ifndef _PPC_BOOT_REG_H
2 #define _PPC_BOOT_REG_H
3 /*
4  * Copyright 2007 Davud Gibson, IBM Corporation.
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version
9  * 2 of the License, or (at your option) any later version.
10  */
11 
12 static inline u32 mfpvr(void)
13 {
14 	u32 pvr;
15 	asm volatile ("mfpvr	%0" : "=r"(pvr));
16 	return pvr;
17 }
18 
19 #define __stringify_1(x)	#x
20 #define __stringify(x)		__stringify_1(x)
21 
22 #define mfspr(rn)	({unsigned long rval; \
23 			asm volatile("mfspr %0," __stringify(rn) \
24 				: "=r" (rval)); rval; })
25 #define mtspr(rn, v)	asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v))
26 
27 register void *__stack_pointer asm("r1");
28 #define get_sp()	(__stack_pointer)
29 
30 #endif	/* _PPC_BOOT_REG_H */
31