12874c5fdSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */ 2e5a2072bSDavid Gibson #ifndef _PPC_BOOT_REG_H 3e5a2072bSDavid Gibson #define _PPC_BOOT_REG_H 4e5a2072bSDavid Gibson /* 5e5a2072bSDavid Gibson * Copyright 2007 Davud Gibson, IBM Corporation. 6e5a2072bSDavid Gibson */ 7e5a2072bSDavid Gibson mfpvr(void)8e5a2072bSDavid Gibsonstatic inline u32 mfpvr(void) 9e5a2072bSDavid Gibson { 10e5a2072bSDavid Gibson u32 pvr; 11e5a2072bSDavid Gibson asm volatile ("mfpvr %0" : "=r"(pvr)); 12e5a2072bSDavid Gibson return pvr; 13e5a2072bSDavid Gibson } 14e5a2072bSDavid Gibson 15ee41eea9SBenjamin Herrenschmidt #define __stringify_1(x) #x 16ee41eea9SBenjamin Herrenschmidt #define __stringify(x) __stringify_1(x) 17ee41eea9SBenjamin Herrenschmidt 18ee41eea9SBenjamin Herrenschmidt #define mfspr(rn) ({unsigned long rval; \ 19ee41eea9SBenjamin Herrenschmidt asm volatile("mfspr %0," __stringify(rn) \ 20ee41eea9SBenjamin Herrenschmidt : "=r" (rval)); rval; }) 21ee41eea9SBenjamin Herrenschmidt #define mtspr(rn, v) asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v)) 22ee41eea9SBenjamin Herrenschmidt 23e5a2072bSDavid Gibson register void *__stack_pointer asm("r1"); 24e5a2072bSDavid Gibson #define get_sp() (__stack_pointer) 25e5a2072bSDavid Gibson 26e5a2072bSDavid Gibson #endif /* _PPC_BOOT_REG_H */ 27