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 20 struct pgm_tdb { 21 u64 data[32]; 22 }; 23 24 struct lowcore { 25 __u8 pad_0x0000[0x0014-0x0000]; /* 0x0000 */ 26 __u32 ipl_parmblock_ptr; /* 0x0014 */ 27 __u8 pad_0x0018[0x0080-0x0018]; /* 0x0018 */ 28 __u32 ext_params; /* 0x0080 */ 29 union { 30 struct { 31 __u16 ext_cpu_addr; /* 0x0084 */ 32 __u16 ext_int_code; /* 0x0086 */ 33 }; 34 __u32 ext_int_code_addr; 35 }; 36 __u32 svc_int_code; /* 0x0088 */ 37 __u16 pgm_ilc; /* 0x008c */ 38 __u16 pgm_code; /* 0x008e */ 39 __u32 data_exc_code; /* 0x0090 */ 40 __u16 mon_class_num; /* 0x0094 */ 41 __u8 per_code; /* 0x0096 */ 42 __u8 per_atmid; /* 0x0097 */ 43 __u64 per_address; /* 0x0098 */ 44 __u8 exc_access_id; /* 0x00a0 */ 45 __u8 per_access_id; /* 0x00a1 */ 46 __u8 op_access_id; /* 0x00a2 */ 47 __u8 ar_mode_id; /* 0x00a3 */ 48 __u8 pad_0x00a4[0x00a8-0x00a4]; /* 0x00a4 */ 49 __u64 trans_exc_code; /* 0x00a8 */ 50 __u64 monitor_code; /* 0x00b0 */ 51 union { 52 struct { 53 __u16 subchannel_id; /* 0x00b8 */ 54 __u16 subchannel_nr; /* 0x00ba */ 55 __u32 io_int_parm; /* 0x00bc */ 56 __u32 io_int_word; /* 0x00c0 */ 57 }; 58 struct tpi_info tpi_info; /* 0x00b8 */ 59 }; 60 __u8 pad_0x00c4[0x00c8-0x00c4]; /* 0x00c4 */ 61 __u32 stfl_fac_list; /* 0x00c8 */ 62 __u8 pad_0x00cc[0x00e8-0x00cc]; /* 0x00cc */ 63 __u64 mcck_interruption_code; /* 0x00e8 */ 64 __u8 pad_0x00f0[0x00f4-0x00f0]; /* 0x00f0 */ 65 __u32 external_damage_code; /* 0x00f4 */ 66 __u64 failing_storage_address; /* 0x00f8 */ 67 __u8 pad_0x0100[0x0110-0x0100]; /* 0x0100 */ 68 __u64 pgm_last_break; /* 0x0110 */ 69 __u8 pad_0x0118[0x0120-0x0118]; /* 0x0118 */ 70 psw_t restart_old_psw; /* 0x0120 */ 71 psw_t external_old_psw; /* 0x0130 */ 72 psw_t svc_old_psw; /* 0x0140 */ 73 psw_t program_old_psw; /* 0x0150 */ 74 psw_t mcck_old_psw; /* 0x0160 */ 75 psw_t io_old_psw; /* 0x0170 */ 76 __u8 pad_0x0180[0x01a0-0x0180]; /* 0x0180 */ 77 psw_t restart_psw; /* 0x01a0 */ 78 psw_t external_new_psw; /* 0x01b0 */ 79 psw_t svc_new_psw; /* 0x01c0 */ 80 psw_t program_new_psw; /* 0x01d0 */ 81 psw_t mcck_new_psw; /* 0x01e0 */ 82 psw_t io_new_psw; /* 0x01f0 */ 83 84 /* Save areas. */ 85 __u64 save_area_sync[8]; /* 0x0200 */ 86 __u64 save_area_async[8]; /* 0x0240 */ 87 __u64 save_area_restart[1]; /* 0x0280 */ 88 89 /* CPU flags. */ 90 __u64 cpu_flags; /* 0x0288 */ 91 92 /* Return psws. */ 93 psw_t return_psw; /* 0x0290 */ 94 psw_t return_mcck_psw; /* 0x02a0 */ 95 96 __u64 last_break; /* 0x02b0 */ 97 98 /* CPU accounting and timing values. */ 99 __u64 sys_enter_timer; /* 0x02b8 */ 100 __u64 mcck_enter_timer; /* 0x02c0 */ 101 __u64 exit_timer; /* 0x02c8 */ 102 __u64 user_timer; /* 0x02d0 */ 103 __u64 guest_timer; /* 0x02d8 */ 104 __u64 system_timer; /* 0x02e0 */ 105 __u64 hardirq_timer; /* 0x02e8 */ 106 __u64 softirq_timer; /* 0x02f0 */ 107 __u64 steal_timer; /* 0x02f8 */ 108 __u64 avg_steal_timer; /* 0x0300 */ 109 __u64 last_update_timer; /* 0x0308 */ 110 __u64 last_update_clock; /* 0x0310 */ 111 __u64 int_clock; /* 0x0318*/ 112 __u64 mcck_clock; /* 0x0320 */ 113 __u64 clock_comparator; /* 0x0328 */ 114 __u64 boot_clock[2]; /* 0x0330 */ 115 116 /* Current process. */ 117 __u64 current_task; /* 0x0340 */ 118 __u64 kernel_stack; /* 0x0348 */ 119 120 /* Interrupt, DAT-off and restartstack. */ 121 __u64 async_stack; /* 0x0350 */ 122 __u64 nodat_stack; /* 0x0358 */ 123 __u64 restart_stack; /* 0x0360 */ 124 __u64 mcck_stack; /* 0x0368 */ 125 /* Restart function and parameter. */ 126 __u64 restart_fn; /* 0x0370 */ 127 __u64 restart_data; /* 0x0378 */ 128 __u32 restart_source; /* 0x0380 */ 129 __u32 restart_flags; /* 0x0384 */ 130 131 /* Address space pointer. */ 132 __u64 kernel_asce; /* 0x0388 */ 133 __u64 user_asce; /* 0x0390 */ 134 135 /* 136 * The lpp and current_pid fields form a 137 * 64-bit value that is set as program 138 * parameter with the LPP instruction. 139 */ 140 __u32 lpp; /* 0x0398 */ 141 __u32 current_pid; /* 0x039c */ 142 143 /* SMP info area */ 144 __u32 cpu_nr; /* 0x03a0 */ 145 __u32 softirq_pending; /* 0x03a4 */ 146 __s32 preempt_count; /* 0x03a8 */ 147 __u32 spinlock_lockval; /* 0x03ac */ 148 __u32 spinlock_index; /* 0x03b0 */ 149 __u32 fpu_flags; /* 0x03b4 */ 150 __u64 percpu_offset; /* 0x03b8 */ 151 __u8 pad_0x03c0[0x03c8-0x03c0]; /* 0x03c0 */ 152 __u64 machine_flags; /* 0x03c8 */ 153 __u64 gmap; /* 0x03d0 */ 154 __u8 pad_0x03d8[0x0400-0x03d8]; /* 0x03d8 */ 155 156 /* br %r1 trampoline */ 157 __u16 br_r1_trampoline; /* 0x0400 */ 158 __u32 return_lpswe; /* 0x0402 */ 159 __u32 return_mcck_lpswe; /* 0x0406 */ 160 __u8 pad_0x040a[0x0e00-0x040a]; /* 0x040a */ 161 162 /* 163 * 0xe00 contains the address of the IPL Parameter Information 164 * block. Dump tools need IPIB for IPL after dump. 165 * Note: do not change the position of any fields in 0x0e00-0x0f00 166 */ 167 __u64 ipib; /* 0x0e00 */ 168 __u32 ipib_checksum; /* 0x0e08 */ 169 __u64 vmcore_info; /* 0x0e0c */ 170 __u8 pad_0x0e14[0x0e18-0x0e14]; /* 0x0e14 */ 171 __u64 os_info; /* 0x0e18 */ 172 __u8 pad_0x0e20[0x11b0-0x0e20]; /* 0x0e20 */ 173 174 /* Pointer to the machine check extended save area */ 175 __u64 mcesad; /* 0x11b0 */ 176 177 /* 64 bit extparam used for pfault/diag 250: defined by architecture */ 178 __u64 ext_params2; /* 0x11B8 */ 179 __u8 pad_0x11c0[0x1200-0x11C0]; /* 0x11C0 */ 180 181 /* CPU register save area: defined by architecture */ 182 __u64 floating_pt_save_area[16]; /* 0x1200 */ 183 __u64 gpregs_save_area[16]; /* 0x1280 */ 184 psw_t psw_save_area; /* 0x1300 */ 185 __u8 pad_0x1310[0x1318-0x1310]; /* 0x1310 */ 186 __u32 prefixreg_save_area; /* 0x1318 */ 187 __u32 fpt_creg_save_area; /* 0x131c */ 188 __u8 pad_0x1320[0x1324-0x1320]; /* 0x1320 */ 189 __u32 tod_progreg_save_area; /* 0x1324 */ 190 __u32 cpu_timer_save_area[2]; /* 0x1328 */ 191 __u32 clock_comp_save_area[2]; /* 0x1330 */ 192 __u64 last_break_save_area; /* 0x1338 */ 193 __u32 access_regs_save_area[16]; /* 0x1340 */ 194 __u64 cregs_save_area[16]; /* 0x1380 */ 195 __u8 pad_0x1400[0x1800-0x1400]; /* 0x1400 */ 196 197 /* Transaction abort diagnostic block */ 198 struct pgm_tdb pgm_tdb; /* 0x1800 */ 199 __u8 pad_0x1900[0x2000-0x1900]; /* 0x1900 */ 200 } __packed __aligned(8192); 201 202 #define S390_lowcore (*((struct lowcore *) 0)) 203 204 extern struct lowcore *lowcore_ptr[]; 205 206 static inline void set_prefix(__u32 address) 207 { 208 asm volatile("spx %0" : : "Q" (address) : "memory"); 209 } 210 211 static inline __u32 store_prefix(void) 212 { 213 __u32 address; 214 215 asm volatile("stpx %0" : "=Q" (address)); 216 return address; 217 } 218 219 #endif /* _ASM_S390_LOWCORE_H */ 220