16c9f99dfSJanosch 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 */ 8eb5a1bbaSCornelia Huck #ifndef _ASMS390X_FACILITY_H_ 9eb5a1bbaSCornelia Huck #define _ASMS390X_FACILITY_H_ 1028f482bdSDavid Hildenbrand 1128f482bdSDavid Hildenbrand #include <libcflat.h> 1228f482bdSDavid Hildenbrand #include <asm/facility.h> 1328f482bdSDavid Hildenbrand #include <asm/arch_def.h> 142989246eSJanosch Frank #include <bitops.h> 1528f482bdSDavid Hildenbrand 166abbd4f0SDavid Hildenbrand #define NB_STFL_DOUBLEWORDS 32 176abbd4f0SDavid Hildenbrand extern uint64_t stfl_doublewords[]; 1828f482bdSDavid Hildenbrand 1928f482bdSDavid Hildenbrand static inline bool test_facility(int nr) 2028f482bdSDavid Hildenbrand { 212989246eSJanosch Frank return test_bit_inv(nr, stfl_doublewords); 2228f482bdSDavid Hildenbrand } 2328f482bdSDavid Hildenbrand 2428f482bdSDavid Hildenbrand static inline void stfl(void) 2528f482bdSDavid Hildenbrand { 2616c1768eSClaudio Imbrenda asm volatile(" stfl 0(0)\n" : : : "memory"); 2728f482bdSDavid Hildenbrand } 2828f482bdSDavid Hildenbrand 296abbd4f0SDavid Hildenbrand static inline void stfle(uint64_t *fac, unsigned int nb_doublewords) 3028f482bdSDavid Hildenbrand { 316abbd4f0SDavid Hildenbrand register unsigned long r0 asm("0") = nb_doublewords - 1; 3228f482bdSDavid Hildenbrand 3328f482bdSDavid Hildenbrand asm volatile(" .insn s,0xb2b00000,0(%1)\n" 3428f482bdSDavid Hildenbrand : "+d" (r0) : "a" (fac) : "memory", "cc"); 3528f482bdSDavid Hildenbrand } 3628f482bdSDavid Hildenbrand 3728f482bdSDavid Hildenbrand static inline void setup_facilities(void) 3828f482bdSDavid Hildenbrand { 3928f482bdSDavid Hildenbrand stfl(); 40*cd719531SJanis Schoetterl-Glausch memcpy(stfl_doublewords, &lowcore.stfl, sizeof(lowcore.stfl)); 4128f482bdSDavid Hildenbrand if (test_facility(7)) 426abbd4f0SDavid Hildenbrand stfle(stfl_doublewords, NB_STFL_DOUBLEWORDS); 4328f482bdSDavid Hildenbrand } 4428f482bdSDavid Hildenbrand 4528f482bdSDavid Hildenbrand #endif 46