1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Copyright IBM Corp. 1999, 2012 4 * Author(s): Hartmut Penner <hp@de.ibm.com>, 5 * Martin Schwidefsky <schwidefsky@de.ibm.com>, 6 * Denis Joseph Barrow, 7 */ 8 9#ifndef _ASM_S390_LOWCORE_H 10#define _ASM_S390_LOWCORE_H 11 12#include <linux/types.h> 13#include <asm/ptrace.h> 14#include <asm/cpu.h> 15#include <asm/types.h> 16 17#define LC_ORDER 1 18#define LC_PAGES 2 19 20struct lowcore { 21 __u8 pad_0x0000[0x0014-0x0000]; /* 0x0000 */ 22 __u32 ipl_parmblock_ptr; /* 0x0014 */ 23 __u8 pad_0x0018[0x0080-0x0018]; /* 0x0018 */ 24 __u32 ext_params; /* 0x0080 */ 25 __u16 ext_cpu_addr; /* 0x0084 */ 26 __u16 ext_int_code; /* 0x0086 */ 27 __u16 svc_ilc; /* 0x0088 */ 28 __u16 svc_code; /* 0x008a */ 29 __u16 pgm_ilc; /* 0x008c */ 30 __u16 pgm_code; /* 0x008e */ 31 __u32 data_exc_code; /* 0x0090 */ 32 __u16 mon_class_num; /* 0x0094 */ 33 __u8 per_code; /* 0x0096 */ 34 __u8 per_atmid; /* 0x0097 */ 35 __u64 per_address; /* 0x0098 */ 36 __u8 exc_access_id; /* 0x00a0 */ 37 __u8 per_access_id; /* 0x00a1 */ 38 __u8 op_access_id; /* 0x00a2 */ 39 __u8 ar_mode_id; /* 0x00a3 */ 40 __u8 pad_0x00a4[0x00a8-0x00a4]; /* 0x00a4 */ 41 __u64 trans_exc_code; /* 0x00a8 */ 42 __u64 monitor_code; /* 0x00b0 */ 43 __u16 subchannel_id; /* 0x00b8 */ 44 __u16 subchannel_nr; /* 0x00ba */ 45 __u32 io_int_parm; /* 0x00bc */ 46 __u32 io_int_word; /* 0x00c0 */ 47 __u8 pad_0x00c4[0x00c8-0x00c4]; /* 0x00c4 */ 48 __u32 stfl_fac_list; /* 0x00c8 */ 49 __u8 pad_0x00cc[0x00e8-0x00cc]; /* 0x00cc */ 50 __u64 mcck_interruption_code; /* 0x00e8 */ 51 __u8 pad_0x00f0[0x00f4-0x00f0]; /* 0x00f0 */ 52 __u32 external_damage_code; /* 0x00f4 */ 53 __u64 failing_storage_address; /* 0x00f8 */ 54 __u8 pad_0x0100[0x0110-0x0100]; /* 0x0100 */ 55 __u64 breaking_event_addr; /* 0x0110 */ 56 __u8 pad_0x0118[0x0120-0x0118]; /* 0x0118 */ 57 psw_t restart_old_psw; /* 0x0120 */ 58 psw_t external_old_psw; /* 0x0130 */ 59 psw_t svc_old_psw; /* 0x0140 */ 60 psw_t program_old_psw; /* 0x0150 */ 61 psw_t mcck_old_psw; /* 0x0160 */ 62 psw_t io_old_psw; /* 0x0170 */ 63 __u8 pad_0x0180[0x01a0-0x0180]; /* 0x0180 */ 64 psw_t restart_psw; /* 0x01a0 */ 65 psw_t external_new_psw; /* 0x01b0 */ 66 psw_t svc_new_psw; /* 0x01c0 */ 67 psw_t program_new_psw; /* 0x01d0 */ 68 psw_t mcck_new_psw; /* 0x01e0 */ 69 psw_t io_new_psw; /* 0x01f0 */ 70 71 /* Save areas. */ 72 __u64 save_area_sync[8]; /* 0x0200 */ 73 __u64 save_area_async[8]; /* 0x0240 */ 74 __u64 save_area_restart[1]; /* 0x0280 */ 75 76 /* CPU flags. */ 77 __u64 cpu_flags; /* 0x0288 */ 78 79 /* Return psws. */ 80 psw_t return_psw; /* 0x0290 */ 81 psw_t return_mcck_psw; /* 0x02a0 */ 82 83 /* CPU accounting and timing values. */ 84 __u64 sync_enter_timer; /* 0x02b0 */ 85 __u64 async_enter_timer; /* 0x02b8 */ 86 __u64 mcck_enter_timer; /* 0x02c0 */ 87 __u64 exit_timer; /* 0x02c8 */ 88 __u64 user_timer; /* 0x02d0 */ 89 __u64 guest_timer; /* 0x02d8 */ 90 __u64 system_timer; /* 0x02e0 */ 91 __u64 hardirq_timer; /* 0x02e8 */ 92 __u64 softirq_timer; /* 0x02f0 */ 93 __u64 steal_timer; /* 0x02f8 */ 94 __u64 avg_steal_timer; /* 0x0300 */ 95 __u64 last_update_timer; /* 0x0308 */ 96 __u64 last_update_clock; /* 0x0310 */ 97 __u64 int_clock; /* 0x0318*/ 98 __u64 mcck_clock; /* 0x0320 */ 99 __u64 clock_comparator; /* 0x0328 */ 100 __u64 boot_clock[2]; /* 0x0330 */ 101 102 /* Current process. */ 103 __u64 current_task; /* 0x0340 */ 104 __u64 kernel_stack; /* 0x0348 */ 105 106 /* Interrupt, DAT-off and restartstack. */ 107 __u64 async_stack; /* 0x0350 */ 108 __u64 nodat_stack; /* 0x0358 */ 109 __u64 restart_stack; /* 0x0360 */ 110 111 /* Restart function and parameter. */ 112 __u64 restart_fn; /* 0x0368 */ 113 __u64 restart_data; /* 0x0370 */ 114 __u64 restart_source; /* 0x0378 */ 115 116 /* Address space pointer. */ 117 __u64 kernel_asce; /* 0x0380 */ 118 __u64 user_asce; /* 0x0388 */ 119 __u64 vdso_asce; /* 0x0390 */ 120 121 /* 122 * The lpp and current_pid fields form a 123 * 64-bit value that is set as program 124 * parameter with the LPP instruction. 125 */ 126 __u32 lpp; /* 0x0398 */ 127 __u32 current_pid; /* 0x039c */ 128 129 /* SMP info area */ 130 __u32 cpu_nr; /* 0x03a0 */ 131 __u32 softirq_pending; /* 0x03a4 */ 132 __s32 preempt_count; /* 0x03a8 */ 133 __u32 spinlock_lockval; /* 0x03ac */ 134 __u32 spinlock_index; /* 0x03b0 */ 135 __u32 fpu_flags; /* 0x03b4 */ 136 __u64 percpu_offset; /* 0x03b8 */ 137 __u64 vdso_per_cpu_data; /* 0x03c0 */ 138 __u64 machine_flags; /* 0x03c8 */ 139 __u64 gmap; /* 0x03d0 */ 140 __u8 pad_0x03d8[0x0400-0x03d8]; /* 0x03d8 */ 141 142 /* br %r1 trampoline */ 143 __u16 br_r1_trampoline; /* 0x0400 */ 144 __u8 pad_0x0402[0x0e00-0x0402]; /* 0x0402 */ 145 146 /* 147 * 0xe00 contains the address of the IPL Parameter Information 148 * block. Dump tools need IPIB for IPL after dump. 149 * Note: do not change the position of any fields in 0x0e00-0x0f00 150 */ 151 __u64 ipib; /* 0x0e00 */ 152 __u32 ipib_checksum; /* 0x0e08 */ 153 __u64 vmcore_info; /* 0x0e0c */ 154 __u8 pad_0x0e14[0x0e18-0x0e14]; /* 0x0e14 */ 155 __u64 os_info; /* 0x0e18 */ 156 __u8 pad_0x0e20[0x0f00-0x0e20]; /* 0x0e20 */ 157 158 /* Extended facility list */ 159 __u64 stfle_fac_list[16]; /* 0x0f00 */ 160 __u64 alt_stfle_fac_list[16]; /* 0x0f80 */ 161 __u8 pad_0x1000[0x11b0-0x1000]; /* 0x1000 */ 162 163 /* Pointer to the machine check extended save area */ 164 __u64 mcesad; /* 0x11b0 */ 165 166 /* 64 bit extparam used for pfault/diag 250: defined by architecture */ 167 __u64 ext_params2; /* 0x11B8 */ 168 __u8 pad_0x11c0[0x1200-0x11C0]; /* 0x11C0 */ 169 170 /* CPU register save area: defined by architecture */ 171 __u64 floating_pt_save_area[16]; /* 0x1200 */ 172 __u64 gpregs_save_area[16]; /* 0x1280 */ 173 psw_t psw_save_area; /* 0x1300 */ 174 __u8 pad_0x1310[0x1318-0x1310]; /* 0x1310 */ 175 __u32 prefixreg_save_area; /* 0x1318 */ 176 __u32 fpt_creg_save_area; /* 0x131c */ 177 __u8 pad_0x1320[0x1324-0x1320]; /* 0x1320 */ 178 __u32 tod_progreg_save_area; /* 0x1324 */ 179 __u32 cpu_timer_save_area[2]; /* 0x1328 */ 180 __u32 clock_comp_save_area[2]; /* 0x1330 */ 181 __u8 pad_0x1338[0x1340-0x1338]; /* 0x1338 */ 182 __u32 access_regs_save_area[16]; /* 0x1340 */ 183 __u64 cregs_save_area[16]; /* 0x1380 */ 184 __u8 pad_0x1400[0x1800-0x1400]; /* 0x1400 */ 185 186 /* Transaction abort diagnostic block */ 187 __u8 pgm_tdb[256]; /* 0x1800 */ 188 __u8 pad_0x1900[0x2000-0x1900]; /* 0x1900 */ 189} __packed __aligned(8192); 190 191#define S390_lowcore (*((struct lowcore *) 0)) 192 193extern struct lowcore *lowcore_ptr[]; 194 195static inline void set_prefix(__u32 address) 196{ 197 asm volatile("spx %0" : : "Q" (address) : "memory"); 198} 199 200static inline __u32 store_prefix(void) 201{ 202 __u32 address; 203 204 asm volatile("stpx %0" : "=Q" (address)); 205 return address; 206} 207 208#endif /* _ASM_S390_LOWCORE_H */ 209