| /* |
| * S390 Basic Architecture |
| * |
| * Copyright (c) 2019 Jason J. Herne <jjherne@us.ibm.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or (at |
| * your option) any later version. See the COPYING file in the top-level |
| * directory. |
| */ |
| |
| #ifndef S390_ARCH_H |
| #define S390_ARCH_H |
| |
| typedef struct PSW { |
| uint64_t mask; |
| uint64_t addr; |
| } __attribute__ ((aligned(8))) PSW; |
| _Static_assert(sizeof(struct PSW) == 16, "PSW size incorrect"); |
| |
| /* Older PSW format used by LPSW instruction */ |
| typedef struct PSWLegacy { |
| uint32_t mask; |
| uint32_t addr; |
| } __attribute__ ((aligned(8))) PSWLegacy; |
| _Static_assert(sizeof(struct PSWLegacy) == 8, "PSWLegacy size incorrect"); |
| |
| /* s390 psw bit masks */ |
| #define PSW_MASK_IOINT 0x0200000000000000ULL |
| #define PSW_MASK_SHORTPSW 0x0008000000000000ULL |
| #define PSW_MASK_WAIT 0x0002000000000000ULL |
| #define PSW_MASK_EAMODE 0x0000000100000000ULL |
| #define PSW_MASK_BAMODE 0x0000000080000000ULL |
| #define PSW_MASK_SHORT_ADDR 0x000000007fffffffULL |
| #define PSW_MASK_64 (PSW_MASK_EAMODE | PSW_MASK_BAMODE) |
| |
| /* Low core mapping */ |
| typedef struct LowCore { |
| /* prefix area: defined by architecture */ |
| PSWLegacy ipl_psw; /* 0x000 */ |
| uint32_t ccw1[2]; /* 0x008 */ |
| union { |
| uint32_t ccw2[2]; /* 0x010 */ |
| struct { |
| uint32_t reserved10; |
| uint32_t ptr_iplb; |
| }; |
| }; |
| uint8_t pad1[0x80 - 0x18]; /* 0x018 */ |
| uint32_t ext_params; /* 0x080 */ |
| uint16_t cpu_addr; /* 0x084 */ |
| uint16_t ext_int_code; /* 0x086 */ |
| uint16_t svc_ilen; /* 0x088 */ |
| uint16_t svc_code; /* 0x08a */ |
| uint16_t pgm_ilen; /* 0x08c */ |
| uint16_t pgm_code; /* 0x08e */ |
| uint32_t data_exc_code; /* 0x090 */ |
| uint16_t mon_class_num; /* 0x094 */ |
| uint16_t per_perc_atmid; /* 0x096 */ |
| uint64_t per_address; /* 0x098 */ |
| uint8_t exc_access_id; /* 0x0a0 */ |
| uint8_t per_access_id; /* 0x0a1 */ |
| uint8_t op_access_id; /* 0x0a2 */ |
| uint8_t ar_access_id; /* 0x0a3 */ |
| uint8_t pad2[0xA8 - 0xA4]; /* 0x0a4 */ |
| uint64_t trans_exc_code; /* 0x0a8 */ |
| uint64_t monitor_code; /* 0x0b0 */ |
| uint16_t subchannel_id; /* 0x0b8 */ |
| uint16_t subchannel_nr; /* 0x0ba */ |
| uint32_t io_int_parm; /* 0x0bc */ |
| uint32_t io_int_word; /* 0x0c0 */ |
| uint8_t pad3[0xc8 - 0xc4]; /* 0x0c4 */ |
| uint32_t stfl_fac_list; /* 0x0c8 */ |
| uint8_t pad4[0xe8 - 0xcc]; /* 0x0cc */ |
| uint64_t mcic; /* 0x0e8 */ |
| uint8_t pad5[0xf4 - 0xf0]; /* 0x0f0 */ |
| uint32_t external_damage_code; /* 0x0f4 */ |
| uint64_t failing_storage_address; /* 0x0f8 */ |
| uint8_t pad6[0x110 - 0x100]; /* 0x100 */ |
| uint64_t per_breaking_event_addr; /* 0x110 */ |
| uint8_t pad7[0x120 - 0x118]; /* 0x118 */ |
| PSW restart_old_psw; /* 0x120 */ |
| PSW external_old_psw; /* 0x130 */ |
| PSW svc_old_psw; /* 0x140 */ |
| PSW program_old_psw; /* 0x150 */ |
| PSW mcck_old_psw; /* 0x160 */ |
| PSW io_old_psw; /* 0x170 */ |
| uint8_t pad8[0x1a0 - 0x180]; /* 0x180 */ |
| PSW restart_new_psw; /* 0x1a0 */ |
| PSW external_new_psw; /* 0x1b0 */ |
| PSW svc_new_psw; /* 0x1c0 */ |
| PSW program_new_psw; /* 0x1d0 */ |
| PSW mcck_new_psw; /* 0x1e0 */ |
| PSW io_new_psw; /* 0x1f0 */ |
| } __attribute__((packed, aligned(8192))) LowCore; |
| |
| extern LowCore *lowcore; |
| |
| /* Location of "S390EP" in a Linux binary (see arch/s390/boot/head.S) */ |
| #define S390EP 0x10008 |
| |
| static inline void set_prefix(uint32_t address) |
| { |
| asm volatile("spx %0" : : "m" (address) : "memory"); |
| } |
| |
| static inline uint32_t store_prefix(void) |
| { |
| uint32_t address; |
| |
| asm volatile("stpx %0" : "=m" (address)); |
| return address; |
| } |
| |
| #endif |
