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 #include <asm/arch_def.h> 11 12 /* create pointer while avoiding compiler warnings */ 13 #define OPAQUE_PTR(x) ((void *)(((uint64_t)&lowcore) + (x))) 14 15 #define SKEY_ACC 0xf0 16 #define SKEY_FP 0x08 17 #define SKEY_RF 0x04 18 #define SKEY_CH 0x02 19 20 union skey { 21 struct { 22 uint8_t acc : 4; 23 uint8_t fp : 1; 24 uint8_t rf : 1; 25 uint8_t ch : 1; 26 uint8_t pad : 1; 27 } str; 28 uint8_t val; 29 }; 30 31 static inline void set_storage_key(void *addr, unsigned char skey, int nq) 32 { 33 if (nq) 34 asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0" 35 : : "d" (skey), "a" (addr)); 36 else 37 asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); 38 } 39 40 static inline void *set_storage_key_mb(void *addr, unsigned char skey) 41 { 42 assert(test_facility(8)); 43 44 asm volatile(".insn rrf,0xb22b0000,%[skey],%[addr],1,0" 45 : [addr] "+a" (addr) : [skey] "d" (skey)); 46 return addr; 47 } 48 49 static inline unsigned char get_storage_key(void *addr) 50 { 51 unsigned char skey; 52 53 asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr)); 54 return skey; 55 } 56 57 static inline unsigned char reset_reference_bit(void *addr) 58 { 59 int cc; 60 61 asm volatile( 62 "rrbe 0,%1\n" 63 "ipm %0\n" 64 "srl %0,28\n" 65 : "=d" (cc) : "a" (addr) : "cc"); 66 return cc; 67 } 68 69 #define PFMF_FSC_4K 0 70 #define PFMF_FSC_1M 1 71 #define PFMF_FSC_2G 2 72 73 union pfmf_r1 { 74 struct { 75 unsigned long pad0 : 32; 76 unsigned long pad1 : 12; 77 unsigned long pad_fmfi : 2; 78 unsigned long sk : 1; /* set key*/ 79 unsigned long cf : 1; /* clear frame */ 80 unsigned long ui : 1; /* usage indication */ 81 unsigned long fsc : 3; 82 unsigned long pad2 : 1; 83 unsigned long mr : 1; 84 unsigned long mc : 1; 85 unsigned long pad3 : 1; 86 unsigned long key : 8; /* storage keys */ 87 } reg; 88 unsigned long val; 89 }; 90 91 static inline void *pfmf(unsigned long r1, void *paddr) 92 { 93 register void * addr asm("1") = paddr; 94 95 asm volatile(".insn rre,0xb9af0000,%[r1],%[addr]" 96 : [addr] "+a" (addr) : [r1] "d" (r1) : "memory"); 97 return addr; 98 } 99 #endif 100