1*6c9f99dfSJanosch Frank /* SPDX-License-Identifier: GPL-2.0-only */ 228f482bdSDavid Hildenbrand /* 328f482bdSDavid Hildenbrand * Copyright (c) 2017 Red Hat Inc 428f482bdSDavid Hildenbrand * 528f482bdSDavid Hildenbrand * Authors: 628f482bdSDavid Hildenbrand * David Hildenbrand <david@redhat.com> 728f482bdSDavid Hildenbrand */ 828f482bdSDavid Hildenbrand #ifndef _ASM_S390X_FACILITY_H_ 928f482bdSDavid Hildenbrand #define _ASM_S390X_FACILITY_H_ 1028f482bdSDavid Hildenbrand 1128f482bdSDavid Hildenbrand #include <libcflat.h> 1228f482bdSDavid Hildenbrand #include <asm/facility.h> 1328f482bdSDavid Hildenbrand #include <asm/arch_def.h> 1428f482bdSDavid Hildenbrand 156abbd4f0SDavid Hildenbrand #define NB_STFL_DOUBLEWORDS 32 166abbd4f0SDavid Hildenbrand extern uint64_t stfl_doublewords[]; 1728f482bdSDavid Hildenbrand 1828f482bdSDavid Hildenbrand static inline bool test_facility(int nr) 1928f482bdSDavid Hildenbrand { 206abbd4f0SDavid Hildenbrand return stfl_doublewords[nr / 64] & (0x8000000000000000UL >> (nr % 64)); 2128f482bdSDavid Hildenbrand } 2228f482bdSDavid Hildenbrand 2328f482bdSDavid Hildenbrand static inline void stfl(void) 2428f482bdSDavid Hildenbrand { 2516c1768eSClaudio Imbrenda asm volatile(" stfl 0(0)\n" : : : "memory"); 2628f482bdSDavid Hildenbrand } 2728f482bdSDavid Hildenbrand 286abbd4f0SDavid Hildenbrand static inline void stfle(uint64_t *fac, unsigned int nb_doublewords) 2928f482bdSDavid Hildenbrand { 306abbd4f0SDavid Hildenbrand register unsigned long r0 asm("0") = nb_doublewords - 1; 3128f482bdSDavid Hildenbrand 3228f482bdSDavid Hildenbrand asm volatile(" .insn s,0xb2b00000,0(%1)\n" 3328f482bdSDavid Hildenbrand : "+d" (r0) : "a" (fac) : "memory", "cc"); 3428f482bdSDavid Hildenbrand } 3528f482bdSDavid Hildenbrand 3628f482bdSDavid Hildenbrand static inline void setup_facilities(void) 3728f482bdSDavid Hildenbrand { 3828f482bdSDavid Hildenbrand struct lowcore *lc = NULL; 3928f482bdSDavid Hildenbrand 4028f482bdSDavid Hildenbrand stfl(); 416abbd4f0SDavid Hildenbrand memcpy(stfl_doublewords, &lc->stfl, sizeof(lc->stfl)); 4228f482bdSDavid Hildenbrand if (test_facility(7)) 436abbd4f0SDavid Hildenbrand stfle(stfl_doublewords, NB_STFL_DOUBLEWORDS); 4428f482bdSDavid Hildenbrand } 4528f482bdSDavid Hildenbrand 4628f482bdSDavid Hildenbrand #endif 47