1 /* 2 * S390 Basic Architecture 3 * 4 * Copyright (c) 2019 Jason J. Herne <jjherne@us.ibm.com> 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or (at 7 * your option) any later version. See the COPYING file in the top-level 8 * directory. 9 */ 10 11 #ifndef S390_ARCH_H 12 #define S390_ARCH_H 13 14 typedef struct PSW { 15 uint64_t mask; 16 uint64_t addr; 17 } __attribute__ ((aligned(8))) PSW; 18 _Static_assert(sizeof(struct PSW) == 16, "PSW size incorrect"); 19 20 /* Older PSW format used by LPSW instruction */ 21 typedef struct PSWLegacy { 22 uint32_t mask; 23 uint32_t addr; 24 } __attribute__ ((aligned(8))) PSWLegacy; 25 _Static_assert(sizeof(struct PSWLegacy) == 8, "PSWLegacy size incorrect"); 26 27 /* s390 psw bit masks */ 28 #define PSW_MASK_IOINT 0x0200000000000000ULL 29 #define PSW_MASK_WAIT 0x0002000000000000ULL 30 #define PSW_MASK_EAMODE 0x0000000100000000ULL 31 #define PSW_MASK_BAMODE 0x0000000080000000ULL 32 #define PSW_MASK_ZMODE (PSW_MASK_EAMODE | PSW_MASK_BAMODE) 33 34 /* Low core mapping */ 35 typedef struct LowCore { 36 /* prefix area: defined by architecture */ 37 PSWLegacy ipl_psw; /* 0x000 */ 38 uint32_t ccw1[2]; /* 0x008 */ 39 uint32_t ccw2[2]; /* 0x010 */ 40 uint8_t pad1[0x80 - 0x18]; /* 0x018 */ 41 uint32_t ext_params; /* 0x080 */ 42 uint16_t cpu_addr; /* 0x084 */ 43 uint16_t ext_int_code; /* 0x086 */ 44 uint16_t svc_ilen; /* 0x088 */ 45 uint16_t svc_code; /* 0x08a */ 46 uint16_t pgm_ilen; /* 0x08c */ 47 uint16_t pgm_code; /* 0x08e */ 48 uint32_t data_exc_code; /* 0x090 */ 49 uint16_t mon_class_num; /* 0x094 */ 50 uint16_t per_perc_atmid; /* 0x096 */ 51 uint64_t per_address; /* 0x098 */ 52 uint8_t exc_access_id; /* 0x0a0 */ 53 uint8_t per_access_id; /* 0x0a1 */ 54 uint8_t op_access_id; /* 0x0a2 */ 55 uint8_t ar_access_id; /* 0x0a3 */ 56 uint8_t pad2[0xA8 - 0xA4]; /* 0x0a4 */ 57 uint64_t trans_exc_code; /* 0x0a8 */ 58 uint64_t monitor_code; /* 0x0b0 */ 59 uint16_t subchannel_id; /* 0x0b8 */ 60 uint16_t subchannel_nr; /* 0x0ba */ 61 uint32_t io_int_parm; /* 0x0bc */ 62 uint32_t io_int_word; /* 0x0c0 */ 63 uint8_t pad3[0xc8 - 0xc4]; /* 0x0c4 */ 64 uint32_t stfl_fac_list; /* 0x0c8 */ 65 uint8_t pad4[0xe8 - 0xcc]; /* 0x0cc */ 66 uint64_t mcic; /* 0x0e8 */ 67 uint8_t pad5[0xf4 - 0xf0]; /* 0x0f0 */ 68 uint32_t external_damage_code; /* 0x0f4 */ 69 uint64_t failing_storage_address; /* 0x0f8 */ 70 uint8_t pad6[0x110 - 0x100]; /* 0x100 */ 71 uint64_t per_breaking_event_addr; /* 0x110 */ 72 uint8_t pad7[0x120 - 0x118]; /* 0x118 */ 73 PSW restart_old_psw; /* 0x120 */ 74 PSW external_old_psw; /* 0x130 */ 75 PSW svc_old_psw; /* 0x140 */ 76 PSW program_old_psw; /* 0x150 */ 77 PSW mcck_old_psw; /* 0x160 */ 78 PSW io_old_psw; /* 0x170 */ 79 uint8_t pad8[0x1a0 - 0x180]; /* 0x180 */ 80 PSW restart_new_psw; /* 0x1a0 */ 81 PSW external_new_psw; /* 0x1b0 */ 82 PSW svc_new_psw; /* 0x1c0 */ 83 PSW program_new_psw; /* 0x1d0 */ 84 PSW mcck_new_psw; /* 0x1e0 */ 85 PSW io_new_psw; /* 0x1f0 */ 86 } __attribute__((packed, aligned(8192))) LowCore; 87 88 extern LowCore const *lowcore; 89 90 static inline void set_prefix(uint32_t address) 91 { 92 asm volatile("spx %0" : : "m" (address) : "memory"); 93 } 94 95 static inline uint32_t store_prefix(void) 96 { 97 uint32_t address; 98 99 asm volatile("stpx %0" : "=m" (address)); 100 return address; 101 } 102 103 #endif 104