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 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