1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Physical memory management related functions and definitions. 4 * 5 * Copyright IBM Corp. 2018 6 * Author(s): Janosch Frank <frankja@linux.ibm.com> 7 */ 8 #ifndef _ASMS390X_MEM_H_ 9 #define _ASMS390X_MEM_H_ 10 11 #define SKEY_ACC 0xf0 12 #define SKEY_FP 0x08 13 #define SKEY_RF 0x04 14 #define SKEY_CH 0x02 15 16 union skey { 17 struct { 18 uint8_t acc : 4; 19 uint8_t fp : 1; 20 uint8_t rf : 1; 21 uint8_t ch : 1; 22 uint8_t pad : 1; 23 } str; 24 uint8_t val; 25 }; 26 27 static inline void set_storage_key(void *addr, unsigned char skey, int nq) 28 { 29 if (nq) 30 asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0" 31 : : "d" (skey), "a" (addr)); 32 else 33 asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); 34 } 35 36 static inline void *set_storage_key_mb(void *addr, unsigned char skey) 37 { 38 assert(test_facility(8)); 39 40 asm volatile(".insn rrf,0xb22b0000,%[skey],%[addr],1,0" 41 : [addr] "+a" (addr) : [skey] "d" (skey)); 42 return addr; 43 } 44 45 static inline unsigned char get_storage_key(void *addr) 46 { 47 unsigned char skey; 48 49 asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr)); 50 return skey; 51 } 52 53 #define PFMF_FSC_4K 0 54 #define PFMF_FSC_1M 1 55 #define PFMF_FSC_2G 2 56 57 union pfmf_r1 { 58 struct { 59 unsigned long pad0 : 32; 60 unsigned long pad1 : 12; 61 unsigned long pad_fmfi : 2; 62 unsigned long sk : 1; /* set key*/ 63 unsigned long cf : 1; /* clear frame */ 64 unsigned long ui : 1; /* usage indication */ 65 unsigned long fsc : 3; 66 unsigned long pad2 : 1; 67 unsigned long mr : 1; 68 unsigned long mc : 1; 69 unsigned long pad3 : 1; 70 unsigned long key : 8; /* storage keys */ 71 } reg; 72 unsigned long val; 73 }; 74 75 static inline void *pfmf(unsigned long r1, void *paddr) 76 { 77 register void * addr asm("1") = paddr; 78 79 asm volatile(".insn rre,0xb9af0000,%[r1],%[addr]" 80 : [addr] "+a" (addr) : [r1] "d" (r1) : "memory"); 81 return addr; 82 } 83 #endif 84