1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2c6557e7fSMartin Schwidefsky /* 3c6557e7fSMartin Schwidefsky * S390 version 4a53c8fabSHeiko Carstens * Copyright IBM Corp. 1999 5c6557e7fSMartin Schwidefsky * Author(s): Hartmut Penner (hp@de.ibm.com), 6c6557e7fSMartin Schwidefsky * Martin Schwidefsky (schwidefsky@de.ibm.com) 7c6557e7fSMartin Schwidefsky * 8c6557e7fSMartin Schwidefsky * Derived from "include/asm-i386/processor.h" 9c6557e7fSMartin Schwidefsky * Copyright (C) 1994, Linus Torvalds 10c6557e7fSMartin Schwidefsky */ 11c6557e7fSMartin Schwidefsky 12c6557e7fSMartin Schwidefsky #ifndef __ASM_S390_PROCESSOR_H 13c6557e7fSMartin Schwidefsky #define __ASM_S390_PROCESSOR_H 14c6557e7fSMartin Schwidefsky 1592778b99SHeiko Carstens #include <linux/const.h> 1692778b99SHeiko Carstens 17d3a73acbSMartin Schwidefsky #define CIF_MCCK_PENDING 0 /* machine check handling is pending */ 18606aa4aaSHeiko Carstens #define CIF_ASCE_PRIMARY 1 /* primary asce needs fixup / uaccess */ 19b5a882fcSHeiko Carstens #define CIF_ASCE_SECONDARY 2 /* secondary asce needs fixup / uaccess */ 20b5a882fcSHeiko Carstens #define CIF_NOHZ_DELAY 3 /* delay HZ disable for a tick */ 21b5a882fcSHeiko Carstens #define CIF_FPU 4 /* restore FPU registers */ 22b5a882fcSHeiko Carstens #define CIF_IGNORE_IRQ 5 /* ignore interrupt (for udelay) */ 23b5a882fcSHeiko Carstens #define CIF_ENABLED_WAIT 6 /* in enabled wait state */ 24c929500dSQingFeng Hao #define CIF_MCCK_GUEST 7 /* machine check happening in guest */ 251887aa07SMartin Schwidefsky #define CIF_DEDICATED_CPU 8 /* this CPU is dedicated */ 26d3a73acbSMartin Schwidefsky 2792778b99SHeiko Carstens #define _CIF_MCCK_PENDING _BITUL(CIF_MCCK_PENDING) 28606aa4aaSHeiko Carstens #define _CIF_ASCE_PRIMARY _BITUL(CIF_ASCE_PRIMARY) 29b5a882fcSHeiko Carstens #define _CIF_ASCE_SECONDARY _BITUL(CIF_ASCE_SECONDARY) 3092778b99SHeiko Carstens #define _CIF_NOHZ_DELAY _BITUL(CIF_NOHZ_DELAY) 3192778b99SHeiko Carstens #define _CIF_FPU _BITUL(CIF_FPU) 3292778b99SHeiko Carstens #define _CIF_IGNORE_IRQ _BITUL(CIF_IGNORE_IRQ) 33419123f9SMartin Schwidefsky #define _CIF_ENABLED_WAIT _BITUL(CIF_ENABLED_WAIT) 34c929500dSQingFeng Hao #define _CIF_MCCK_GUEST _BITUL(CIF_MCCK_GUEST) 351887aa07SMartin Schwidefsky #define _CIF_DEDICATED_CPU _BITUL(CIF_DEDICATED_CPU) 36d3a73acbSMartin Schwidefsky 37eb608fb3SHeiko Carstens #ifndef __ASSEMBLY__ 38eb608fb3SHeiko Carstens 39edd53787SHeiko Carstens #include <linux/linkage.h> 40a0616cdeSDavid Howells #include <linux/irqflags.h> 41e86a6ed6SHeiko Carstens #include <asm/cpu.h> 4225097bf1SChristian Ehrhardt #include <asm/page.h> 43c6557e7fSMartin Schwidefsky #include <asm/ptrace.h> 4425097bf1SChristian Ehrhardt #include <asm/setup.h> 45e4b8b3f3SJan Glauber #include <asm/runtime_instr.h> 46b0753902SHendrik Brueckner #include <asm/fpu/types.h> 47b0753902SHendrik Brueckner #include <asm/fpu/internal.h> 48c6557e7fSMartin Schwidefsky 49d3a73acbSMartin Schwidefsky static inline void set_cpu_flag(int flag) 50d3a73acbSMartin Schwidefsky { 51ac25e790SHeiko Carstens S390_lowcore.cpu_flags |= (1UL << flag); 52d3a73acbSMartin Schwidefsky } 53d3a73acbSMartin Schwidefsky 54d3a73acbSMartin Schwidefsky static inline void clear_cpu_flag(int flag) 55d3a73acbSMartin Schwidefsky { 56ac25e790SHeiko Carstens S390_lowcore.cpu_flags &= ~(1UL << flag); 57d3a73acbSMartin Schwidefsky } 58d3a73acbSMartin Schwidefsky 59d3a73acbSMartin Schwidefsky static inline int test_cpu_flag(int flag) 60d3a73acbSMartin Schwidefsky { 61ac25e790SHeiko Carstens return !!(S390_lowcore.cpu_flags & (1UL << flag)); 62d3a73acbSMartin Schwidefsky } 63d3a73acbSMartin Schwidefsky 64419123f9SMartin Schwidefsky /* 65419123f9SMartin Schwidefsky * Test CIF flag of another CPU. The caller needs to ensure that 66419123f9SMartin Schwidefsky * CPU hotplug can not happen, e.g. by disabling preemption. 67419123f9SMartin Schwidefsky */ 68419123f9SMartin Schwidefsky static inline int test_cpu_flag_of(int flag, int cpu) 69419123f9SMartin Schwidefsky { 70c667aeacSHeiko Carstens struct lowcore *lc = lowcore_ptr[cpu]; 71419123f9SMartin Schwidefsky return !!(lc->cpu_flags & (1UL << flag)); 72419123f9SMartin Schwidefsky } 73419123f9SMartin Schwidefsky 74fe0f4976SMartin Schwidefsky #define arch_needs_cpu() test_cpu_flag(CIF_NOHZ_DELAY) 75fe0f4976SMartin Schwidefsky 76c6557e7fSMartin Schwidefsky /* 77c6557e7fSMartin Schwidefsky * Default implementation of macro that returns current 78c6557e7fSMartin Schwidefsky * instruction pointer ("program counter"). 79c6557e7fSMartin Schwidefsky */ 80c6557e7fSMartin Schwidefsky #define current_text_addr() ({ void *pc; asm("basr %0,0" : "=a" (pc)); pc; }) 81c6557e7fSMartin Schwidefsky 82e86a6ed6SHeiko Carstens static inline void get_cpu_id(struct cpuid *ptr) 83c6557e7fSMartin Schwidefsky { 84987bcdacSMartin Schwidefsky asm volatile("stidp %0" : "=Q" (*ptr)); 85c6557e7fSMartin Schwidefsky } 86c6557e7fSMartin Schwidefsky 87097a116cSHeiko Carstens void s390_adjust_jiffies(void); 88097a116cSHeiko Carstens void s390_update_cpu_mhz(void); 89097a116cSHeiko Carstens void cpu_detect_mhz_feature(void); 90097a116cSHeiko Carstens 91638ad34aSMartin Schwidefsky extern const struct seq_operations cpuinfo_op; 92638ad34aSMartin Schwidefsky extern int sysctl_ieee_emulation_warnings; 9365f22a90SAl Viro extern void execve_tail(void); 94c6557e7fSMartin Schwidefsky 95c6557e7fSMartin Schwidefsky /* 96f481bfafSMartin Schwidefsky * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit. 97c6557e7fSMartin Schwidefsky */ 98c6557e7fSMartin Schwidefsky 99ee71d16dSMartin Schwidefsky #define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_31BIT) ? \ 1001aea9b3fSMartin Schwidefsky (1UL << 31) : -PAGE_SIZE) 101c6557e7fSMartin Schwidefsky #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \ 102c6557e7fSMartin Schwidefsky (1UL << 30) : (1UL << 41)) 103c6557e7fSMartin Schwidefsky #define TASK_SIZE TASK_SIZE_OF(current) 1041aea9b3fSMartin Schwidefsky #define TASK_SIZE_MAX (-PAGE_SIZE) 105c6557e7fSMartin Schwidefsky 106ee71d16dSMartin Schwidefsky #define STACK_TOP (test_thread_flag(TIF_31BIT) ? \ 107ee71d16dSMartin Schwidefsky (1UL << 31) : (1UL << 42)) 108c6557e7fSMartin Schwidefsky #define STACK_TOP_MAX (1UL << 42) 109c6557e7fSMartin Schwidefsky 110c6557e7fSMartin Schwidefsky #define HAVE_ARCH_PICK_MMAP_LAYOUT 111c6557e7fSMartin Schwidefsky 1120aaba41bSMartin Schwidefsky typedef unsigned int mm_segment_t; 113c6557e7fSMartin Schwidefsky 114c6557e7fSMartin Schwidefsky /* 115c6557e7fSMartin Schwidefsky * Thread structure 116c6557e7fSMartin Schwidefsky */ 117c6557e7fSMartin Schwidefsky struct thread_struct { 118c6557e7fSMartin Schwidefsky unsigned int acrs[NUM_ACRS]; 119c6557e7fSMartin Schwidefsky unsigned long ksp; /* kernel stack pointer */ 12090c53e65SMartin Schwidefsky unsigned long user_timer; /* task cputime in user space */ 121b7394a5fSMartin Schwidefsky unsigned long guest_timer; /* task cputime in kvm guest */ 12290c53e65SMartin Schwidefsky unsigned long system_timer; /* task cputime in kernel space */ 123b7394a5fSMartin Schwidefsky unsigned long hardirq_timer; /* task cputime in hardirq context */ 124b7394a5fSMartin Schwidefsky unsigned long softirq_timer; /* task cputime in softirq context */ 125ef280c85SMartin Schwidefsky unsigned long sys_call_table; /* system call table address */ 126c6557e7fSMartin Schwidefsky mm_segment_t mm_segment; 127e5992f2eSMartin Schwidefsky unsigned long gmap_addr; /* address of last gmap fault. */ 1284be130a0SMartin Schwidefsky unsigned int gmap_write_flag; /* gmap fault write indication */ 1294a494439SDavid Hildenbrand unsigned int gmap_int_code; /* int code of last gmap fault */ 13024eb3a82SDominik Dingel unsigned int gmap_pfault; /* signal of a pending guest pfault */ 131f8fc82b4SMartin Schwidefsky /* Per-thread information related to debugging */ 1325e9a2692SMartin Schwidefsky struct per_regs per_user; /* User specified PER registers */ 1335e9a2692SMartin Schwidefsky struct per_event per_event; /* Cause of the last PER trap */ 134d35339a4SMartin Schwidefsky unsigned long per_flags; /* Flags to control debug behavior */ 135f8fc82b4SMartin Schwidefsky unsigned int system_call; /* system call number in signal */ 136ef280c85SMartin Schwidefsky unsigned long last_break; /* last breaking-event-address. */ 137c6557e7fSMartin Schwidefsky /* pfault_wait is used to block the process on a pfault event */ 138c6557e7fSMartin Schwidefsky unsigned long pfault_wait; 139f2db2e6cSHeiko Carstens struct list_head list; 140e4b8b3f3SJan Glauber /* cpu runtime instrumentation */ 141e4b8b3f3SJan Glauber struct runtime_instr_cb *ri_cb; 142916cda1aSMartin Schwidefsky struct gs_cb *gs_cb; /* Current guarded storage cb */ 143916cda1aSMartin Schwidefsky struct gs_cb *gs_bc_cb; /* Broadcast guarded storage cb */ 144d35339a4SMartin Schwidefsky unsigned char trap_tdb[256]; /* Transaction abort diagnose block */ 1453f6813b9SMartin Schwidefsky /* 1463f6813b9SMartin Schwidefsky * Warning: 'fpu' is dynamically-sized. It *MUST* be at 1473f6813b9SMartin Schwidefsky * the end. 1483f6813b9SMartin Schwidefsky */ 1493f6813b9SMartin Schwidefsky struct fpu fpu; /* FP and VX register save area */ 150c6557e7fSMartin Schwidefsky }; 151c6557e7fSMartin Schwidefsky 15264597f9dSMichael Mueller /* Flag to disable transactions. */ 15364597f9dSMichael Mueller #define PER_FLAG_NO_TE 1UL 15464597f9dSMichael Mueller /* Flag to enable random transaction aborts. */ 15564597f9dSMichael Mueller #define PER_FLAG_TE_ABORT_RAND 2UL 15664597f9dSMichael Mueller /* Flag to specify random transaction abort mode: 15764597f9dSMichael Mueller * - abort each transaction at a random instruction before TEND if set. 15864597f9dSMichael Mueller * - abort random transactions at a random instruction if cleared. 15964597f9dSMichael Mueller */ 16064597f9dSMichael Mueller #define PER_FLAG_TE_ABORT_RAND_TEND 4UL 161d35339a4SMartin Schwidefsky 162c6557e7fSMartin Schwidefsky typedef struct thread_struct thread_struct; 163c6557e7fSMartin Schwidefsky 164c6557e7fSMartin Schwidefsky /* 165c6557e7fSMartin Schwidefsky * Stack layout of a C stack frame. 166c6557e7fSMartin Schwidefsky */ 167c6557e7fSMartin Schwidefsky #ifndef __PACK_STACK 168c6557e7fSMartin Schwidefsky struct stack_frame { 169c6557e7fSMartin Schwidefsky unsigned long back_chain; 170c6557e7fSMartin Schwidefsky unsigned long empty1[5]; 171c6557e7fSMartin Schwidefsky unsigned long gprs[10]; 172c6557e7fSMartin Schwidefsky unsigned int empty2[8]; 173c6557e7fSMartin Schwidefsky }; 174c6557e7fSMartin Schwidefsky #else 175c6557e7fSMartin Schwidefsky struct stack_frame { 176c6557e7fSMartin Schwidefsky unsigned long empty1[5]; 177c6557e7fSMartin Schwidefsky unsigned int empty2[8]; 178c6557e7fSMartin Schwidefsky unsigned long gprs[10]; 179c6557e7fSMartin Schwidefsky unsigned long back_chain; 180c6557e7fSMartin Schwidefsky }; 181c6557e7fSMartin Schwidefsky #endif 182c6557e7fSMartin Schwidefsky 183c6557e7fSMartin Schwidefsky #define ARCH_MIN_TASKALIGN 8 184c6557e7fSMartin Schwidefsky 185c6557e7fSMartin Schwidefsky #define INIT_THREAD { \ 186c6557e7fSMartin Schwidefsky .ksp = sizeof(init_stack) + (unsigned long) &init_stack, \ 1873f6813b9SMartin Schwidefsky .fpu.regs = (void *) init_task.thread.fpu.fprs, \ 188c6557e7fSMartin Schwidefsky } 189c6557e7fSMartin Schwidefsky 190c6557e7fSMartin Schwidefsky /* 191c6557e7fSMartin Schwidefsky * Do necessary setup to start up a new thread. 192c6557e7fSMartin Schwidefsky */ 193c6557e7fSMartin Schwidefsky #define start_thread(regs, new_psw, new_stackp) do { \ 194e258d719SMartin Schwidefsky regs->psw.mask = PSW_USER_BITS | PSW_MASK_EA | PSW_MASK_BA; \ 195fecc868aSHeiko Carstens regs->psw.addr = new_psw; \ 196c6557e7fSMartin Schwidefsky regs->gprs[15] = new_stackp; \ 19765f22a90SAl Viro execve_tail(); \ 198c6557e7fSMartin Schwidefsky } while (0) 199c6557e7fSMartin Schwidefsky 200c6557e7fSMartin Schwidefsky #define start_thread31(regs, new_psw, new_stackp) do { \ 201e258d719SMartin Schwidefsky regs->psw.mask = PSW_USER_BITS | PSW_MASK_BA; \ 202fecc868aSHeiko Carstens regs->psw.addr = new_psw; \ 203c6557e7fSMartin Schwidefsky regs->gprs[15] = new_stackp; \ 204723cacbdSGerald Schaefer crst_table_downgrade(current->mm); \ 20565f22a90SAl Viro execve_tail(); \ 206c6557e7fSMartin Schwidefsky } while (0) 207c6557e7fSMartin Schwidefsky 208c6557e7fSMartin Schwidefsky /* Forward declaration, a strange C thing */ 209c6557e7fSMartin Schwidefsky struct task_struct; 210c6557e7fSMartin Schwidefsky struct mm_struct; 211c6557e7fSMartin Schwidefsky struct seq_file; 212b5a882fcSHeiko Carstens struct pt_regs; 213c6557e7fSMartin Schwidefsky 214d0208639SHeiko Carstens typedef int (*dump_trace_func_t)(void *data, unsigned long address, int reliable); 215758d39ebSHeiko Carstens void dump_trace(dump_trace_func_t func, void *data, 216758d39ebSHeiko Carstens struct task_struct *task, unsigned long sp); 217b5a882fcSHeiko Carstens void show_registers(struct pt_regs *regs); 218758d39ebSHeiko Carstens 2195a79859aSHeiko Carstens void show_cacheinfo(struct seq_file *m); 2206668022cSHeiko Carstens 221c6557e7fSMartin Schwidefsky /* Free all resources held by a thread. */ 2228076428fSHeiko Carstens static inline void release_thread(struct task_struct *tsk) { } 223c6557e7fSMartin Schwidefsky 2247b83c629SHeiko Carstens /* Free guarded storage control block */ 2257b83c629SHeiko Carstens void guarded_storage_release(struct task_struct *tsk); 226916cda1aSMartin Schwidefsky 227c6557e7fSMartin Schwidefsky unsigned long get_wchan(struct task_struct *p); 228c6557e7fSMartin Schwidefsky #define task_pt_regs(tsk) ((struct pt_regs *) \ 229c6557e7fSMartin Schwidefsky (task_stack_page(tsk) + THREAD_SIZE) - 1) 230c6557e7fSMartin Schwidefsky #define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr) 231c6557e7fSMartin Schwidefsky #define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15]) 232c6557e7fSMartin Schwidefsky 2335ebf250dSHeiko Carstens /* Has task runtime instrumentation enabled ? */ 2345ebf250dSHeiko Carstens #define is_ri_task(tsk) (!!(tsk)->thread.ri_cb) 2355ebf250dSHeiko Carstens 23676737ce1SHeiko Carstens static inline unsigned long current_stack_pointer(void) 23776737ce1SHeiko Carstens { 23876737ce1SHeiko Carstens unsigned long sp; 23976737ce1SHeiko Carstens 24076737ce1SHeiko Carstens asm volatile("la %0,0(15)" : "=a" (sp)); 24176737ce1SHeiko Carstens return sp; 24276737ce1SHeiko Carstens } 24376737ce1SHeiko Carstens 244a0616cdeSDavid Howells static inline unsigned short stap(void) 245a0616cdeSDavid Howells { 246a0616cdeSDavid Howells unsigned short cpu_address; 247a0616cdeSDavid Howells 248a0616cdeSDavid Howells asm volatile("stap %0" : "=m" (cpu_address)); 249a0616cdeSDavid Howells return cpu_address; 250a0616cdeSDavid Howells } 251a0616cdeSDavid Howells 252c6557e7fSMartin Schwidefsky /* 253c6557e7fSMartin Schwidefsky * Give up the time slice of the virtual PU. 254c6557e7fSMartin Schwidefsky */ 2556d0d2878SChristian Borntraeger #define cpu_relax_yield cpu_relax_yield 25679ab11cdSChristian Borntraeger void cpu_relax_yield(void); 257c6557e7fSMartin Schwidefsky 25822b6430dSChristian Borntraeger #define cpu_relax() barrier() 259083986e8SHeiko Carstens 260097a116cSHeiko Carstens #define ECAG_CACHE_ATTRIBUTE 0 261097a116cSHeiko Carstens #define ECAG_CPU_ATTRIBUTE 1 262097a116cSHeiko Carstens 263097a116cSHeiko Carstens static inline unsigned long __ecag(unsigned int asi, unsigned char parm) 264097a116cSHeiko Carstens { 265097a116cSHeiko Carstens unsigned long val; 266097a116cSHeiko Carstens 267097a116cSHeiko Carstens asm volatile(".insn rsy,0xeb000000004c,%0,0,0(%1)" /* ecag */ 268097a116cSHeiko Carstens : "=d" (val) : "a" (asi << 8 | parm)); 269097a116cSHeiko Carstens return val; 270097a116cSHeiko Carstens } 271097a116cSHeiko Carstens 272c6557e7fSMartin Schwidefsky static inline void psw_set_key(unsigned int key) 273c6557e7fSMartin Schwidefsky { 274c6557e7fSMartin Schwidefsky asm volatile("spka 0(%0)" : : "d" (key)); 275c6557e7fSMartin Schwidefsky } 276c6557e7fSMartin Schwidefsky 277c6557e7fSMartin Schwidefsky /* 278c6557e7fSMartin Schwidefsky * Set PSW to specified value. 279c6557e7fSMartin Schwidefsky */ 280c6557e7fSMartin Schwidefsky static inline void __load_psw(psw_t psw) 281c6557e7fSMartin Schwidefsky { 282987bcdacSMartin Schwidefsky asm volatile("lpswe %0" : : "Q" (psw) : "cc"); 283c6557e7fSMartin Schwidefsky } 284c6557e7fSMartin Schwidefsky 285c6557e7fSMartin Schwidefsky /* 286c6557e7fSMartin Schwidefsky * Set PSW mask to specified value, while leaving the 287c6557e7fSMartin Schwidefsky * PSW addr pointing to the next instruction. 288c6557e7fSMartin Schwidefsky */ 289c6557e7fSMartin Schwidefsky static inline void __load_psw_mask(unsigned long mask) 290c6557e7fSMartin Schwidefsky { 291c6557e7fSMartin Schwidefsky unsigned long addr; 292c6557e7fSMartin Schwidefsky psw_t psw; 293c6557e7fSMartin Schwidefsky 294c6557e7fSMartin Schwidefsky psw.mask = mask; 295c6557e7fSMartin Schwidefsky 296c6557e7fSMartin Schwidefsky asm volatile( 297c6557e7fSMartin Schwidefsky " larl %0,1f\n" 298987bcdacSMartin Schwidefsky " stg %0,%O1+8(%R1)\n" 299987bcdacSMartin Schwidefsky " lpswe %1\n" 300c6557e7fSMartin Schwidefsky "1:" 301987bcdacSMartin Schwidefsky : "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc"); 302c6557e7fSMartin Schwidefsky } 303c6557e7fSMartin Schwidefsky 304c6557e7fSMartin Schwidefsky /* 30522362a0eSMartin Schwidefsky * Extract current PSW mask 30622362a0eSMartin Schwidefsky */ 30722362a0eSMartin Schwidefsky static inline unsigned long __extract_psw(void) 30822362a0eSMartin Schwidefsky { 30922362a0eSMartin Schwidefsky unsigned int reg1, reg2; 31022362a0eSMartin Schwidefsky 31122362a0eSMartin Schwidefsky asm volatile("epsw %0,%1" : "=d" (reg1), "=a" (reg2)); 31222362a0eSMartin Schwidefsky return (((unsigned long) reg1) << 32) | ((unsigned long) reg2); 31322362a0eSMartin Schwidefsky } 31422362a0eSMartin Schwidefsky 315ecbafda8SHeiko Carstens static inline void local_mcck_enable(void) 316ecbafda8SHeiko Carstens { 317ecbafda8SHeiko Carstens __load_psw_mask(__extract_psw() | PSW_MASK_MCHECK); 318ecbafda8SHeiko Carstens } 319ecbafda8SHeiko Carstens 320ecbafda8SHeiko Carstens static inline void local_mcck_disable(void) 321ecbafda8SHeiko Carstens { 322ecbafda8SHeiko Carstens __load_psw_mask(__extract_psw() & ~PSW_MASK_MCHECK); 323ecbafda8SHeiko Carstens } 324ecbafda8SHeiko Carstens 32522362a0eSMartin Schwidefsky /* 326ccf45cafSMartin Schwidefsky * Rewind PSW instruction address by specified number of bytes. 327ccf45cafSMartin Schwidefsky */ 328ccf45cafSMartin Schwidefsky static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc) 329ccf45cafSMartin Schwidefsky { 330ccf45cafSMartin Schwidefsky unsigned long mask; 331ccf45cafSMartin Schwidefsky 332ccf45cafSMartin Schwidefsky mask = (psw.mask & PSW_MASK_EA) ? -1UL : 333ccf45cafSMartin Schwidefsky (psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 : 334ccf45cafSMartin Schwidefsky (1UL << 24) - 1; 335ccf45cafSMartin Schwidefsky return (psw.addr - ilc) & mask; 336ccf45cafSMartin Schwidefsky } 337ccf45cafSMartin Schwidefsky 338b5f87f15SMartin Schwidefsky /* 339b5f87f15SMartin Schwidefsky * Function to stop a processor until the next interrupt occurs 340b5f87f15SMartin Schwidefsky */ 341b5f87f15SMartin Schwidefsky void enabled_wait(void); 342b5f87f15SMartin Schwidefsky 343ccf45cafSMartin Schwidefsky /* 344c6557e7fSMartin Schwidefsky * Function to drop a processor into disabled wait state 345c6557e7fSMartin Schwidefsky */ 346ff2d8b19SJoe Perches static inline void __noreturn disabled_wait(unsigned long code) 347c6557e7fSMartin Schwidefsky { 348f9e6edfbSHeiko Carstens psw_t psw; 349c6557e7fSMartin Schwidefsky 350f9e6edfbSHeiko Carstens psw.mask = PSW_MASK_BASE | PSW_MASK_WAIT | PSW_MASK_BA | PSW_MASK_EA; 351f9e6edfbSHeiko Carstens psw.addr = code; 352f9e6edfbSHeiko Carstens __load_psw(psw); 353edd53787SHeiko Carstens while (1); 354c6557e7fSMartin Schwidefsky } 355c6557e7fSMartin Schwidefsky 356c6557e7fSMartin Schwidefsky /* 357c6557e7fSMartin Schwidefsky * Basic Machine Check/Program Check Handler. 358c6557e7fSMartin Schwidefsky */ 359c6557e7fSMartin Schwidefsky 360c6557e7fSMartin Schwidefsky extern void s390_base_mcck_handler(void); 361c6557e7fSMartin Schwidefsky extern void s390_base_pgm_handler(void); 362c6557e7fSMartin Schwidefsky extern void s390_base_ext_handler(void); 363c6557e7fSMartin Schwidefsky 364c6557e7fSMartin Schwidefsky extern void (*s390_base_mcck_handler_fn)(void); 365c6557e7fSMartin Schwidefsky extern void (*s390_base_pgm_handler_fn)(void); 366c6557e7fSMartin Schwidefsky extern void (*s390_base_ext_handler_fn)(void); 367c6557e7fSMartin Schwidefsky 368c6557e7fSMartin Schwidefsky #define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL 369c6557e7fSMartin Schwidefsky 370fbe76568SHeiko Carstens extern int memcpy_real(void *, void *, size_t); 371fbe76568SHeiko Carstens extern void memcpy_absolute(void *, void *, size_t); 372fbe76568SHeiko Carstens 3731228f7beSHeiko Carstens #define mem_assign_absolute(dest, val) do { \ 374fbe76568SHeiko Carstens __typeof__(dest) __tmp = (val); \ 375fbe76568SHeiko Carstens \ 376fbe76568SHeiko Carstens BUILD_BUG_ON(sizeof(__tmp) != sizeof(val)); \ 377fbe76568SHeiko Carstens memcpy_absolute(&(dest), &__tmp, sizeof(__tmp)); \ 3781228f7beSHeiko Carstens } while (0) 379fbe76568SHeiko Carstens 380eb608fb3SHeiko Carstens #endif /* __ASSEMBLY__ */ 381eb608fb3SHeiko Carstens 382c6557e7fSMartin Schwidefsky #endif /* __ASM_S390_PROCESSOR_H */ 383