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 3938f2c691SMartin Schwidefsky #include <linux/cpumask.h> 40edd53787SHeiko Carstens #include <linux/linkage.h> 41a0616cdeSDavid Howells #include <linux/irqflags.h> 42e86a6ed6SHeiko Carstens #include <asm/cpu.h> 4325097bf1SChristian Ehrhardt #include <asm/page.h> 44c6557e7fSMartin Schwidefsky #include <asm/ptrace.h> 4525097bf1SChristian Ehrhardt #include <asm/setup.h> 46e4b8b3f3SJan Glauber #include <asm/runtime_instr.h> 47b0753902SHendrik Brueckner #include <asm/fpu/types.h> 48b0753902SHendrik Brueckner #include <asm/fpu/internal.h> 49c6557e7fSMartin Schwidefsky 50d3a73acbSMartin Schwidefsky static inline void set_cpu_flag(int flag) 51d3a73acbSMartin Schwidefsky { 52ac25e790SHeiko Carstens S390_lowcore.cpu_flags |= (1UL << flag); 53d3a73acbSMartin Schwidefsky } 54d3a73acbSMartin Schwidefsky 55d3a73acbSMartin Schwidefsky static inline void clear_cpu_flag(int flag) 56d3a73acbSMartin Schwidefsky { 57ac25e790SHeiko Carstens S390_lowcore.cpu_flags &= ~(1UL << flag); 58d3a73acbSMartin Schwidefsky } 59d3a73acbSMartin Schwidefsky 60d3a73acbSMartin Schwidefsky static inline int test_cpu_flag(int flag) 61d3a73acbSMartin Schwidefsky { 62ac25e790SHeiko Carstens return !!(S390_lowcore.cpu_flags & (1UL << flag)); 63d3a73acbSMartin Schwidefsky } 64d3a73acbSMartin Schwidefsky 65419123f9SMartin Schwidefsky /* 66419123f9SMartin Schwidefsky * Test CIF flag of another CPU. The caller needs to ensure that 67419123f9SMartin Schwidefsky * CPU hotplug can not happen, e.g. by disabling preemption. 68419123f9SMartin Schwidefsky */ 69419123f9SMartin Schwidefsky static inline int test_cpu_flag_of(int flag, int cpu) 70419123f9SMartin Schwidefsky { 71c667aeacSHeiko Carstens struct lowcore *lc = lowcore_ptr[cpu]; 72419123f9SMartin Schwidefsky return !!(lc->cpu_flags & (1UL << flag)); 73419123f9SMartin Schwidefsky } 74419123f9SMartin Schwidefsky 75fe0f4976SMartin Schwidefsky #define arch_needs_cpu() test_cpu_flag(CIF_NOHZ_DELAY) 76fe0f4976SMartin Schwidefsky 77e86a6ed6SHeiko Carstens static inline void get_cpu_id(struct cpuid *ptr) 78c6557e7fSMartin Schwidefsky { 79987bcdacSMartin Schwidefsky asm volatile("stidp %0" : "=Q" (*ptr)); 80c6557e7fSMartin Schwidefsky } 81c6557e7fSMartin Schwidefsky 82097a116cSHeiko Carstens void s390_adjust_jiffies(void); 83097a116cSHeiko Carstens void s390_update_cpu_mhz(void); 84097a116cSHeiko Carstens void cpu_detect_mhz_feature(void); 85097a116cSHeiko Carstens 86638ad34aSMartin Schwidefsky extern const struct seq_operations cpuinfo_op; 87638ad34aSMartin Schwidefsky extern int sysctl_ieee_emulation_warnings; 8865f22a90SAl Viro extern void execve_tail(void); 89d768bd89SMartin Schwidefsky extern void __bpon(void); 90c6557e7fSMartin Schwidefsky 91c6557e7fSMartin Schwidefsky /* 92f481bfafSMartin Schwidefsky * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit. 93c6557e7fSMartin Schwidefsky */ 94c6557e7fSMartin Schwidefsky 95ee71d16dSMartin Schwidefsky #define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_31BIT) ? \ 961aea9b3fSMartin Schwidefsky (1UL << 31) : -PAGE_SIZE) 97c6557e7fSMartin Schwidefsky #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \ 98c6557e7fSMartin Schwidefsky (1UL << 30) : (1UL << 41)) 99c6557e7fSMartin Schwidefsky #define TASK_SIZE TASK_SIZE_OF(current) 1001aea9b3fSMartin Schwidefsky #define TASK_SIZE_MAX (-PAGE_SIZE) 101c6557e7fSMartin Schwidefsky 102ee71d16dSMartin Schwidefsky #define STACK_TOP (test_thread_flag(TIF_31BIT) ? \ 103ee71d16dSMartin Schwidefsky (1UL << 31) : (1UL << 42)) 104c6557e7fSMartin Schwidefsky #define STACK_TOP_MAX (1UL << 42) 105c6557e7fSMartin Schwidefsky 106c6557e7fSMartin Schwidefsky #define HAVE_ARCH_PICK_MMAP_LAYOUT 107c6557e7fSMartin Schwidefsky 1080aaba41bSMartin Schwidefsky typedef unsigned int mm_segment_t; 109c6557e7fSMartin Schwidefsky 110c6557e7fSMartin Schwidefsky /* 111c6557e7fSMartin Schwidefsky * Thread structure 112c6557e7fSMartin Schwidefsky */ 113c6557e7fSMartin Schwidefsky struct thread_struct { 114c6557e7fSMartin Schwidefsky unsigned int acrs[NUM_ACRS]; 115c6557e7fSMartin Schwidefsky unsigned long ksp; /* kernel stack pointer */ 11690c53e65SMartin Schwidefsky unsigned long user_timer; /* task cputime in user space */ 117b7394a5fSMartin Schwidefsky unsigned long guest_timer; /* task cputime in kvm guest */ 11890c53e65SMartin Schwidefsky unsigned long system_timer; /* task cputime in kernel space */ 119b7394a5fSMartin Schwidefsky unsigned long hardirq_timer; /* task cputime in hardirq context */ 120b7394a5fSMartin Schwidefsky unsigned long softirq_timer; /* task cputime in softirq context */ 121ef280c85SMartin Schwidefsky unsigned long sys_call_table; /* system call table address */ 122c6557e7fSMartin Schwidefsky mm_segment_t mm_segment; 123e5992f2eSMartin Schwidefsky unsigned long gmap_addr; /* address of last gmap fault. */ 1244be130a0SMartin Schwidefsky unsigned int gmap_write_flag; /* gmap fault write indication */ 1254a494439SDavid Hildenbrand unsigned int gmap_int_code; /* int code of last gmap fault */ 12624eb3a82SDominik Dingel unsigned int gmap_pfault; /* signal of a pending guest pfault */ 127f8fc82b4SMartin Schwidefsky /* Per-thread information related to debugging */ 1285e9a2692SMartin Schwidefsky struct per_regs per_user; /* User specified PER registers */ 1295e9a2692SMartin Schwidefsky struct per_event per_event; /* Cause of the last PER trap */ 130d35339a4SMartin Schwidefsky unsigned long per_flags; /* Flags to control debug behavior */ 131f8fc82b4SMartin Schwidefsky unsigned int system_call; /* system call number in signal */ 132ef280c85SMartin Schwidefsky unsigned long last_break; /* last breaking-event-address. */ 133c6557e7fSMartin Schwidefsky /* pfault_wait is used to block the process on a pfault event */ 134c6557e7fSMartin Schwidefsky unsigned long pfault_wait; 135f2db2e6cSHeiko Carstens struct list_head list; 136e4b8b3f3SJan Glauber /* cpu runtime instrumentation */ 137e4b8b3f3SJan Glauber struct runtime_instr_cb *ri_cb; 138916cda1aSMartin Schwidefsky struct gs_cb *gs_cb; /* Current guarded storage cb */ 139916cda1aSMartin Schwidefsky struct gs_cb *gs_bc_cb; /* Broadcast guarded storage cb */ 140d35339a4SMartin Schwidefsky unsigned char trap_tdb[256]; /* Transaction abort diagnose block */ 1413f6813b9SMartin Schwidefsky /* 1423f6813b9SMartin Schwidefsky * Warning: 'fpu' is dynamically-sized. It *MUST* be at 1433f6813b9SMartin Schwidefsky * the end. 1443f6813b9SMartin Schwidefsky */ 1453f6813b9SMartin Schwidefsky struct fpu fpu; /* FP and VX register save area */ 146c6557e7fSMartin Schwidefsky }; 147c6557e7fSMartin Schwidefsky 14864597f9dSMichael Mueller /* Flag to disable transactions. */ 14964597f9dSMichael Mueller #define PER_FLAG_NO_TE 1UL 15064597f9dSMichael Mueller /* Flag to enable random transaction aborts. */ 15164597f9dSMichael Mueller #define PER_FLAG_TE_ABORT_RAND 2UL 15264597f9dSMichael Mueller /* Flag to specify random transaction abort mode: 15364597f9dSMichael Mueller * - abort each transaction at a random instruction before TEND if set. 15464597f9dSMichael Mueller * - abort random transactions at a random instruction if cleared. 15564597f9dSMichael Mueller */ 15664597f9dSMichael Mueller #define PER_FLAG_TE_ABORT_RAND_TEND 4UL 157d35339a4SMartin Schwidefsky 158c6557e7fSMartin Schwidefsky typedef struct thread_struct thread_struct; 159c6557e7fSMartin Schwidefsky 160c6557e7fSMartin Schwidefsky #define ARCH_MIN_TASKALIGN 8 161c6557e7fSMartin Schwidefsky 162c6557e7fSMartin Schwidefsky #define INIT_THREAD { \ 163c6557e7fSMartin Schwidefsky .ksp = sizeof(init_stack) + (unsigned long) &init_stack, \ 1643f6813b9SMartin Schwidefsky .fpu.regs = (void *) init_task.thread.fpu.fprs, \ 165c6557e7fSMartin Schwidefsky } 166c6557e7fSMartin Schwidefsky 167c6557e7fSMartin Schwidefsky /* 168c6557e7fSMartin Schwidefsky * Do necessary setup to start up a new thread. 169c6557e7fSMartin Schwidefsky */ 170c6557e7fSMartin Schwidefsky #define start_thread(regs, new_psw, new_stackp) do { \ 171e258d719SMartin Schwidefsky regs->psw.mask = PSW_USER_BITS | PSW_MASK_EA | PSW_MASK_BA; \ 172fecc868aSHeiko Carstens regs->psw.addr = new_psw; \ 173c6557e7fSMartin Schwidefsky regs->gprs[15] = new_stackp; \ 17465f22a90SAl Viro execve_tail(); \ 175c6557e7fSMartin Schwidefsky } while (0) 176c6557e7fSMartin Schwidefsky 177c6557e7fSMartin Schwidefsky #define start_thread31(regs, new_psw, new_stackp) do { \ 178e258d719SMartin Schwidefsky regs->psw.mask = PSW_USER_BITS | PSW_MASK_BA; \ 179fecc868aSHeiko Carstens regs->psw.addr = new_psw; \ 180c6557e7fSMartin Schwidefsky regs->gprs[15] = new_stackp; \ 181723cacbdSGerald Schaefer crst_table_downgrade(current->mm); \ 18265f22a90SAl Viro execve_tail(); \ 183c6557e7fSMartin Schwidefsky } while (0) 184c6557e7fSMartin Schwidefsky 185c6557e7fSMartin Schwidefsky /* Forward declaration, a strange C thing */ 186c6557e7fSMartin Schwidefsky struct task_struct; 187c6557e7fSMartin Schwidefsky struct mm_struct; 188c6557e7fSMartin Schwidefsky struct seq_file; 189b5a882fcSHeiko Carstens struct pt_regs; 190c6557e7fSMartin Schwidefsky 191b5a882fcSHeiko Carstens void show_registers(struct pt_regs *regs); 1925a79859aSHeiko Carstens void show_cacheinfo(struct seq_file *m); 1936668022cSHeiko Carstens 194c6557e7fSMartin Schwidefsky /* Free all resources held by a thread. */ 1958076428fSHeiko Carstens static inline void release_thread(struct task_struct *tsk) { } 196c6557e7fSMartin Schwidefsky 1977b83c629SHeiko Carstens /* Free guarded storage control block */ 1987b83c629SHeiko Carstens void guarded_storage_release(struct task_struct *tsk); 199916cda1aSMartin Schwidefsky 200c6557e7fSMartin Schwidefsky unsigned long get_wchan(struct task_struct *p); 201c6557e7fSMartin Schwidefsky #define task_pt_regs(tsk) ((struct pt_regs *) \ 202c6557e7fSMartin Schwidefsky (task_stack_page(tsk) + THREAD_SIZE) - 1) 203c6557e7fSMartin Schwidefsky #define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr) 204c6557e7fSMartin Schwidefsky #define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15]) 205c6557e7fSMartin Schwidefsky 2065ebf250dSHeiko Carstens /* Has task runtime instrumentation enabled ? */ 2075ebf250dSHeiko Carstens #define is_ri_task(tsk) (!!(tsk)->thread.ri_cb) 2085ebf250dSHeiko Carstens 20976737ce1SHeiko Carstens static inline unsigned long current_stack_pointer(void) 21076737ce1SHeiko Carstens { 21176737ce1SHeiko Carstens unsigned long sp; 21276737ce1SHeiko Carstens 21376737ce1SHeiko Carstens asm volatile("la %0,0(15)" : "=a" (sp)); 21476737ce1SHeiko Carstens return sp; 21576737ce1SHeiko Carstens } 21676737ce1SHeiko Carstens 217163c8d54SMartin Schwidefsky static __no_kasan_or_inline unsigned short stap(void) 218a0616cdeSDavid Howells { 219a0616cdeSDavid Howells unsigned short cpu_address; 220a0616cdeSDavid Howells 22111776eaaSVasily Gorbik asm volatile("stap %0" : "=Q" (cpu_address)); 222a0616cdeSDavid Howells return cpu_address; 223a0616cdeSDavid Howells } 224a0616cdeSDavid Howells 225c6557e7fSMartin Schwidefsky /* 226c6557e7fSMartin Schwidefsky * Give up the time slice of the virtual PU. 227c6557e7fSMartin Schwidefsky */ 2286d0d2878SChristian Borntraeger #define cpu_relax_yield cpu_relax_yield 22938f2c691SMartin Schwidefsky void cpu_relax_yield(const struct cpumask *cpumask); 230c6557e7fSMartin Schwidefsky 23122b6430dSChristian Borntraeger #define cpu_relax() barrier() 232083986e8SHeiko Carstens 233097a116cSHeiko Carstens #define ECAG_CACHE_ATTRIBUTE 0 234097a116cSHeiko Carstens #define ECAG_CPU_ATTRIBUTE 1 235097a116cSHeiko Carstens 236097a116cSHeiko Carstens static inline unsigned long __ecag(unsigned int asi, unsigned char parm) 237097a116cSHeiko Carstens { 238097a116cSHeiko Carstens unsigned long val; 239097a116cSHeiko Carstens 240097a116cSHeiko Carstens asm volatile(".insn rsy,0xeb000000004c,%0,0,0(%1)" /* ecag */ 241097a116cSHeiko Carstens : "=d" (val) : "a" (asi << 8 | parm)); 242097a116cSHeiko Carstens return val; 243097a116cSHeiko Carstens } 244097a116cSHeiko Carstens 245c6557e7fSMartin Schwidefsky static inline void psw_set_key(unsigned int key) 246c6557e7fSMartin Schwidefsky { 247c6557e7fSMartin Schwidefsky asm volatile("spka 0(%0)" : : "d" (key)); 248c6557e7fSMartin Schwidefsky } 249c6557e7fSMartin Schwidefsky 250c6557e7fSMartin Schwidefsky /* 251c6557e7fSMartin Schwidefsky * Set PSW to specified value. 252c6557e7fSMartin Schwidefsky */ 253c6557e7fSMartin Schwidefsky static inline void __load_psw(psw_t psw) 254c6557e7fSMartin Schwidefsky { 255987bcdacSMartin Schwidefsky asm volatile("lpswe %0" : : "Q" (psw) : "cc"); 256c6557e7fSMartin Schwidefsky } 257c6557e7fSMartin Schwidefsky 258c6557e7fSMartin Schwidefsky /* 259c6557e7fSMartin Schwidefsky * Set PSW mask to specified value, while leaving the 260c6557e7fSMartin Schwidefsky * PSW addr pointing to the next instruction. 261c6557e7fSMartin Schwidefsky */ 262163c8d54SMartin Schwidefsky static __no_kasan_or_inline void __load_psw_mask(unsigned long mask) 263c6557e7fSMartin Schwidefsky { 264c6557e7fSMartin Schwidefsky unsigned long addr; 265c6557e7fSMartin Schwidefsky psw_t psw; 266c6557e7fSMartin Schwidefsky 267c6557e7fSMartin Schwidefsky psw.mask = mask; 268c6557e7fSMartin Schwidefsky 269c6557e7fSMartin Schwidefsky asm volatile( 270c6557e7fSMartin Schwidefsky " larl %0,1f\n" 2710a113efcSArnd Bergmann " stg %0,%1\n" 2720a113efcSArnd Bergmann " lpswe %2\n" 273c6557e7fSMartin Schwidefsky "1:" 2740a113efcSArnd Bergmann : "=&d" (addr), "=Q" (psw.addr) : "Q" (psw) : "memory", "cc"); 275c6557e7fSMartin Schwidefsky } 276c6557e7fSMartin Schwidefsky 277c6557e7fSMartin Schwidefsky /* 27822362a0eSMartin Schwidefsky * Extract current PSW mask 27922362a0eSMartin Schwidefsky */ 28022362a0eSMartin Schwidefsky static inline unsigned long __extract_psw(void) 28122362a0eSMartin Schwidefsky { 28222362a0eSMartin Schwidefsky unsigned int reg1, reg2; 28322362a0eSMartin Schwidefsky 28422362a0eSMartin Schwidefsky asm volatile("epsw %0,%1" : "=d" (reg1), "=a" (reg2)); 28522362a0eSMartin Schwidefsky return (((unsigned long) reg1) << 32) | ((unsigned long) reg2); 28622362a0eSMartin Schwidefsky } 28722362a0eSMartin Schwidefsky 288ecbafda8SHeiko Carstens static inline void local_mcck_enable(void) 289ecbafda8SHeiko Carstens { 290ecbafda8SHeiko Carstens __load_psw_mask(__extract_psw() | PSW_MASK_MCHECK); 291ecbafda8SHeiko Carstens } 292ecbafda8SHeiko Carstens 293ecbafda8SHeiko Carstens static inline void local_mcck_disable(void) 294ecbafda8SHeiko Carstens { 295ecbafda8SHeiko Carstens __load_psw_mask(__extract_psw() & ~PSW_MASK_MCHECK); 296ecbafda8SHeiko Carstens } 297ecbafda8SHeiko Carstens 29822362a0eSMartin Schwidefsky /* 299ccf45cafSMartin Schwidefsky * Rewind PSW instruction address by specified number of bytes. 300ccf45cafSMartin Schwidefsky */ 301ccf45cafSMartin Schwidefsky static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc) 302ccf45cafSMartin Schwidefsky { 303ccf45cafSMartin Schwidefsky unsigned long mask; 304ccf45cafSMartin Schwidefsky 305ccf45cafSMartin Schwidefsky mask = (psw.mask & PSW_MASK_EA) ? -1UL : 306ccf45cafSMartin Schwidefsky (psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 : 307ccf45cafSMartin Schwidefsky (1UL << 24) - 1; 308ccf45cafSMartin Schwidefsky return (psw.addr - ilc) & mask; 309ccf45cafSMartin Schwidefsky } 310ccf45cafSMartin Schwidefsky 311b5f87f15SMartin Schwidefsky /* 312b5f87f15SMartin Schwidefsky * Function to stop a processor until the next interrupt occurs 313b5f87f15SMartin Schwidefsky */ 314b5f87f15SMartin Schwidefsky void enabled_wait(void); 315b5f87f15SMartin Schwidefsky 316ccf45cafSMartin Schwidefsky /* 317c6557e7fSMartin Schwidefsky * Function to drop a processor into disabled wait state 318c6557e7fSMartin Schwidefsky */ 31998587c2dSMartin Schwidefsky static inline void __noreturn disabled_wait(void) 320c6557e7fSMartin Schwidefsky { 321f9e6edfbSHeiko Carstens psw_t psw; 322c6557e7fSMartin Schwidefsky 323f9e6edfbSHeiko Carstens psw.mask = PSW_MASK_BASE | PSW_MASK_WAIT | PSW_MASK_BA | PSW_MASK_EA; 32498587c2dSMartin Schwidefsky psw.addr = _THIS_IP_; 325f9e6edfbSHeiko Carstens __load_psw(psw); 326edd53787SHeiko Carstens while (1); 327c6557e7fSMartin Schwidefsky } 328c6557e7fSMartin Schwidefsky 329c6557e7fSMartin Schwidefsky /* 330c6557e7fSMartin Schwidefsky * Basic Machine Check/Program Check Handler. 331c6557e7fSMartin Schwidefsky */ 332c6557e7fSMartin Schwidefsky 333c6557e7fSMartin Schwidefsky extern void s390_base_mcck_handler(void); 334c6557e7fSMartin Schwidefsky extern void s390_base_pgm_handler(void); 335c6557e7fSMartin Schwidefsky extern void s390_base_ext_handler(void); 336c6557e7fSMartin Schwidefsky 337c6557e7fSMartin Schwidefsky extern void (*s390_base_mcck_handler_fn)(void); 338c6557e7fSMartin Schwidefsky extern void (*s390_base_pgm_handler_fn)(void); 339c6557e7fSMartin Schwidefsky extern void (*s390_base_ext_handler_fn)(void); 340c6557e7fSMartin Schwidefsky 341c6557e7fSMartin Schwidefsky #define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL 342c6557e7fSMartin Schwidefsky 343fbe76568SHeiko Carstens extern int memcpy_real(void *, void *, size_t); 344fbe76568SHeiko Carstens extern void memcpy_absolute(void *, void *, size_t); 345fbe76568SHeiko Carstens 3461228f7beSHeiko Carstens #define mem_assign_absolute(dest, val) do { \ 347fbe76568SHeiko Carstens __typeof__(dest) __tmp = (val); \ 348fbe76568SHeiko Carstens \ 349fbe76568SHeiko Carstens BUILD_BUG_ON(sizeof(__tmp) != sizeof(val)); \ 350fbe76568SHeiko Carstens memcpy_absolute(&(dest), &__tmp, sizeof(__tmp)); \ 3511228f7beSHeiko Carstens } while (0) 352fbe76568SHeiko Carstens 3536b73044bSMartin Schwidefsky extern int s390_isolate_bp(void); 3546b73044bSMartin Schwidefsky extern int s390_isolate_bp_guest(void); 3556b73044bSMartin Schwidefsky 356eb608fb3SHeiko Carstens #endif /* __ASSEMBLY__ */ 357eb608fb3SHeiko Carstens 358c6557e7fSMartin Schwidefsky #endif /* __ASM_S390_PROCESSOR_H */ 359