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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * S390 version
4 * Copyright IBM Corp. 1999
5 * Author(s): Hartmut Penner (hp@de.ibm.com),
6 * Martin Schwidefsky (schwidefsky@de.ibm.com)
7 *
8 * Derived from "include/asm-i386/processor.h"
9 * Copyright (C) 1994, Linus Torvalds
10 */
11
12#ifndef __ASM_S390_PROCESSOR_H
13#define __ASM_S390_PROCESSOR_H
14
15#include <linux/bits.h>
16
17#define CIF_NOHZ_DELAY 2 /* delay HZ disable for a tick */
18#define CIF_FPU 3 /* restore FPU registers */
19#define CIF_ENABLED_WAIT 5 /* in enabled wait state */
20#define CIF_MCCK_GUEST 6 /* machine check happening in guest */
21#define CIF_DEDICATED_CPU 7 /* this CPU is dedicated */
22
23#define _CIF_NOHZ_DELAY BIT(CIF_NOHZ_DELAY)
24#define _CIF_FPU BIT(CIF_FPU)
25#define _CIF_ENABLED_WAIT BIT(CIF_ENABLED_WAIT)
26#define _CIF_MCCK_GUEST BIT(CIF_MCCK_GUEST)
27#define _CIF_DEDICATED_CPU BIT(CIF_DEDICATED_CPU)
28
29#define RESTART_FLAG_CTLREGS _AC(1 << 0, U)
30
31#ifndef __ASSEMBLY__
32
33#include <linux/cpumask.h>
34#include <linux/linkage.h>
35#include <linux/irqflags.h>
36#include <asm/cpu.h>
37#include <asm/page.h>
38#include <asm/ptrace.h>
39#include <asm/setup.h>
40#include <asm/runtime_instr.h>
41#include <asm/fpu/types.h>
42#include <asm/fpu/internal.h>
43#include <asm/irqflags.h>
44
45typedef long (*sys_call_ptr_t)(struct pt_regs *regs);
46
47static inline void set_cpu_flag(int flag)
48{
49 S390_lowcore.cpu_flags |= (1UL << flag);
50}
51
52static inline void clear_cpu_flag(int flag)
53{
54 S390_lowcore.cpu_flags &= ~(1UL << flag);
55}
56
57static inline int test_cpu_flag(int flag)
58{
59 return !!(S390_lowcore.cpu_flags & (1UL << flag));
60}
61
62/*
63 * Test CIF flag of another CPU. The caller needs to ensure that
64 * CPU hotplug can not happen, e.g. by disabling preemption.
65 */
66static inline int test_cpu_flag_of(int flag, int cpu)
67{
68 struct lowcore *lc = lowcore_ptr[cpu];
69 return !!(lc->cpu_flags & (1UL << flag));
70}
71
72#define arch_needs_cpu() test_cpu_flag(CIF_NOHZ_DELAY)
73
74static inline void get_cpu_id(struct cpuid *ptr)
75{
76 asm volatile("stidp %0" : "=Q" (*ptr));
77}
78
79void s390_adjust_jiffies(void);
80void s390_update_cpu_mhz(void);
81void cpu_detect_mhz_feature(void);
82
83extern const struct seq_operations cpuinfo_op;
84extern void execve_tail(void);
85extern void __bpon(void);
86unsigned long vdso_size(void);
87
88/*
89 * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
90 */
91
92#define TASK_SIZE (test_thread_flag(TIF_31BIT) ? \
93 _REGION3_SIZE : TASK_SIZE_MAX)
94#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \
95 (_REGION3_SIZE >> 1) : (_REGION2_SIZE >> 1))
96#define TASK_SIZE_MAX (-PAGE_SIZE)
97
98#define VDSO_BASE (STACK_TOP + PAGE_SIZE)
99#define VDSO_LIMIT (test_thread_flag(TIF_31BIT) ? _REGION3_SIZE : _REGION2_SIZE)
100#define STACK_TOP (VDSO_LIMIT - vdso_size() - PAGE_SIZE)
101#define STACK_TOP_MAX (_REGION2_SIZE - vdso_size() - PAGE_SIZE)
102
103#define HAVE_ARCH_PICK_MMAP_LAYOUT
104
105/*
106 * Thread structure
107 */
108struct thread_struct {
109 unsigned int acrs[NUM_ACRS];
110 unsigned long ksp; /* kernel stack pointer */
111 unsigned long user_timer; /* task cputime in user space */
112 unsigned long guest_timer; /* task cputime in kvm guest */
113 unsigned long system_timer; /* task cputime in kernel space */
114 unsigned long hardirq_timer; /* task cputime in hardirq context */
115 unsigned long softirq_timer; /* task cputime in softirq context */
116 const sys_call_ptr_t *sys_call_table; /* system call table address */
117 unsigned long gmap_addr; /* address of last gmap fault. */
118 unsigned int gmap_write_flag; /* gmap fault write indication */
119 unsigned int gmap_int_code; /* int code of last gmap fault */
120 unsigned int gmap_pfault; /* signal of a pending guest pfault */
121
122 /* Per-thread information related to debugging */
123 struct per_regs per_user; /* User specified PER registers */
124 struct per_event per_event; /* Cause of the last PER trap */
125 unsigned long per_flags; /* Flags to control debug behavior */
126 unsigned int system_call; /* system call number in signal */
127 unsigned long last_break; /* last breaking-event-address. */
128 /* pfault_wait is used to block the process on a pfault event */
129 unsigned long pfault_wait;
130 struct list_head list;
131 /* cpu runtime instrumentation */
132 struct runtime_instr_cb *ri_cb;
133 struct gs_cb *gs_cb; /* Current guarded storage cb */
134 struct gs_cb *gs_bc_cb; /* Broadcast guarded storage cb */
135 struct pgm_tdb trap_tdb; /* Transaction abort diagnose block */
136 /*
137 * Warning: 'fpu' is dynamically-sized. It *MUST* be at
138 * the end.
139 */
140 struct fpu fpu; /* FP and VX register save area */
141};
142
143/* Flag to disable transactions. */
144#define PER_FLAG_NO_TE 1UL
145/* Flag to enable random transaction aborts. */
146#define PER_FLAG_TE_ABORT_RAND 2UL
147/* Flag to specify random transaction abort mode:
148 * - abort each transaction at a random instruction before TEND if set.
149 * - abort random transactions at a random instruction if cleared.
150 */
151#define PER_FLAG_TE_ABORT_RAND_TEND 4UL
152
153typedef struct thread_struct thread_struct;
154
155#define ARCH_MIN_TASKALIGN 8
156
157#define INIT_THREAD { \
158 .ksp = sizeof(init_stack) + (unsigned long) &init_stack, \
159 .fpu.regs = (void *) init_task.thread.fpu.fprs, \
160 .last_break = 1, \
161}
162
163/*
164 * Do necessary setup to start up a new thread.
165 */
166#define start_thread(regs, new_psw, new_stackp) do { \
167 regs->psw.mask = PSW_USER_BITS | PSW_MASK_EA | PSW_MASK_BA; \
168 regs->psw.addr = new_psw; \
169 regs->gprs[15] = new_stackp; \
170 execve_tail(); \
171} while (0)
172
173#define start_thread31(regs, new_psw, new_stackp) do { \
174 regs->psw.mask = PSW_USER_BITS | PSW_MASK_BA; \
175 regs->psw.addr = new_psw; \
176 regs->gprs[15] = new_stackp; \
177 execve_tail(); \
178} while (0)
179
180/* Forward declaration, a strange C thing */
181struct task_struct;
182struct mm_struct;
183struct seq_file;
184struct pt_regs;
185
186void show_registers(struct pt_regs *regs);
187void show_cacheinfo(struct seq_file *m);
188
189/* Free guarded storage control block */
190void guarded_storage_release(struct task_struct *tsk);
191void gs_load_bc_cb(struct pt_regs *regs);
192
193unsigned long __get_wchan(struct task_struct *p);
194#define task_pt_regs(tsk) ((struct pt_regs *) \
195 (task_stack_page(tsk) + THREAD_SIZE) - 1)
196#define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr)
197#define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15])
198
199/* Has task runtime instrumentation enabled ? */
200#define is_ri_task(tsk) (!!(tsk)->thread.ri_cb)
201
202/* avoid using global register due to gcc bug in versions < 8.4 */
203#define current_stack_pointer (__current_stack_pointer())
204
205static __always_inline unsigned long __current_stack_pointer(void)
206{
207 unsigned long sp;
208
209 asm volatile("lgr %0,15" : "=d" (sp));
210 return sp;
211}
212
213static __always_inline unsigned short stap(void)
214{
215 unsigned short cpu_address;
216
217 asm volatile("stap %0" : "=Q" (cpu_address));
218 return cpu_address;
219}
220
221#define cpu_relax() barrier()
222
223#define ECAG_CACHE_ATTRIBUTE 0
224#define ECAG_CPU_ATTRIBUTE 1
225
226static inline unsigned long __ecag(unsigned int asi, unsigned char parm)
227{
228 unsigned long val;
229
230 asm volatile("ecag %0,0,0(%1)" : "=d" (val) : "a" (asi << 8 | parm));
231 return val;
232}
233
234static inline void psw_set_key(unsigned int key)
235{
236 asm volatile("spka 0(%0)" : : "d" (key));
237}
238
239/*
240 * Set PSW to specified value.
241 */
242static inline void __load_psw(psw_t psw)
243{
244 asm volatile("lpswe %0" : : "Q" (psw) : "cc");
245}
246
247/*
248 * Set PSW mask to specified value, while leaving the
249 * PSW addr pointing to the next instruction.
250 */
251static __always_inline void __load_psw_mask(unsigned long mask)
252{
253 unsigned long addr;
254 psw_t psw;
255
256 psw.mask = mask;
257
258 asm volatile(
259 " larl %0,1f\n"
260 " stg %0,%1\n"
261 " lpswe %2\n"
262 "1:"
263 : "=&d" (addr), "=Q" (psw.addr) : "Q" (psw) : "memory", "cc");
264}
265
266/*
267 * Extract current PSW mask
268 */
269static inline unsigned long __extract_psw(void)
270{
271 unsigned int reg1, reg2;
272
273 asm volatile("epsw %0,%1" : "=d" (reg1), "=a" (reg2));
274 return (((unsigned long) reg1) << 32) | ((unsigned long) reg2);
275}
276
277static inline void local_mcck_enable(void)
278{
279 __load_psw_mask(__extract_psw() | PSW_MASK_MCHECK);
280}
281
282static inline void local_mcck_disable(void)
283{
284 __load_psw_mask(__extract_psw() & ~PSW_MASK_MCHECK);
285}
286
287/*
288 * Rewind PSW instruction address by specified number of bytes.
289 */
290static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc)
291{
292 unsigned long mask;
293
294 mask = (psw.mask & PSW_MASK_EA) ? -1UL :
295 (psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 :
296 (1UL << 24) - 1;
297 return (psw.addr - ilc) & mask;
298}
299
300/*
301 * Function to drop a processor into disabled wait state
302 */
303static __always_inline void __noreturn disabled_wait(void)
304{
305 psw_t psw;
306
307 psw.mask = PSW_MASK_BASE | PSW_MASK_WAIT | PSW_MASK_BA | PSW_MASK_EA;
308 psw.addr = _THIS_IP_;
309 __load_psw(psw);
310 while (1);
311}
312
313#define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL
314
315extern int s390_isolate_bp(void);
316extern int s390_isolate_bp_guest(void);
317
318static __always_inline bool regs_irqs_disabled(struct pt_regs *regs)
319{
320 return arch_irqs_disabled_flags(regs->psw.mask);
321}
322
323#endif /* __ASSEMBLY__ */
324
325#endif /* __ASM_S390_PROCESSOR_H */
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * S390 version
4 * Copyright IBM Corp. 1999
5 * Author(s): Hartmut Penner (hp@de.ibm.com),
6 * Martin Schwidefsky (schwidefsky@de.ibm.com)
7 *
8 * Derived from "include/asm-i386/processor.h"
9 * Copyright (C) 1994, Linus Torvalds
10 */
11
12#ifndef __ASM_S390_PROCESSOR_H
13#define __ASM_S390_PROCESSOR_H
14
15#include <linux/const.h>
16
17#define CIF_MCCK_PENDING 0 /* machine check handling is pending */
18#define CIF_ASCE_PRIMARY 1 /* primary asce needs fixup / uaccess */
19#define CIF_ASCE_SECONDARY 2 /* secondary asce needs fixup / uaccess */
20#define CIF_NOHZ_DELAY 3 /* delay HZ disable for a tick */
21#define CIF_FPU 4 /* restore FPU registers */
22#define CIF_IGNORE_IRQ 5 /* ignore interrupt (for udelay) */
23#define CIF_ENABLED_WAIT 6 /* in enabled wait state */
24#define CIF_MCCK_GUEST 7 /* machine check happening in guest */
25#define CIF_DEDICATED_CPU 8 /* this CPU is dedicated */
26
27#define _CIF_MCCK_PENDING _BITUL(CIF_MCCK_PENDING)
28#define _CIF_ASCE_PRIMARY _BITUL(CIF_ASCE_PRIMARY)
29#define _CIF_ASCE_SECONDARY _BITUL(CIF_ASCE_SECONDARY)
30#define _CIF_NOHZ_DELAY _BITUL(CIF_NOHZ_DELAY)
31#define _CIF_FPU _BITUL(CIF_FPU)
32#define _CIF_IGNORE_IRQ _BITUL(CIF_IGNORE_IRQ)
33#define _CIF_ENABLED_WAIT _BITUL(CIF_ENABLED_WAIT)
34#define _CIF_MCCK_GUEST _BITUL(CIF_MCCK_GUEST)
35#define _CIF_DEDICATED_CPU _BITUL(CIF_DEDICATED_CPU)
36
37#ifndef __ASSEMBLY__
38
39#include <linux/linkage.h>
40#include <linux/irqflags.h>
41#include <asm/cpu.h>
42#include <asm/page.h>
43#include <asm/ptrace.h>
44#include <asm/setup.h>
45#include <asm/runtime_instr.h>
46#include <asm/fpu/types.h>
47#include <asm/fpu/internal.h>
48
49static inline void set_cpu_flag(int flag)
50{
51 S390_lowcore.cpu_flags |= (1UL << flag);
52}
53
54static inline void clear_cpu_flag(int flag)
55{
56 S390_lowcore.cpu_flags &= ~(1UL << flag);
57}
58
59static inline int test_cpu_flag(int flag)
60{
61 return !!(S390_lowcore.cpu_flags & (1UL << flag));
62}
63
64/*
65 * Test CIF flag of another CPU. The caller needs to ensure that
66 * CPU hotplug can not happen, e.g. by disabling preemption.
67 */
68static inline int test_cpu_flag_of(int flag, int cpu)
69{
70 struct lowcore *lc = lowcore_ptr[cpu];
71 return !!(lc->cpu_flags & (1UL << flag));
72}
73
74#define arch_needs_cpu() test_cpu_flag(CIF_NOHZ_DELAY)
75
76/*
77 * Default implementation of macro that returns current
78 * instruction pointer ("program counter").
79 */
80#define current_text_addr() ({ void *pc; asm("basr %0,0" : "=a" (pc)); pc; })
81
82static inline void get_cpu_id(struct cpuid *ptr)
83{
84 asm volatile("stidp %0" : "=Q" (*ptr));
85}
86
87void s390_adjust_jiffies(void);
88void s390_update_cpu_mhz(void);
89void cpu_detect_mhz_feature(void);
90
91extern const struct seq_operations cpuinfo_op;
92extern int sysctl_ieee_emulation_warnings;
93extern void execve_tail(void);
94extern void __bpon(void);
95
96/*
97 * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
98 */
99
100#define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_31BIT) ? \
101 (1UL << 31) : -PAGE_SIZE)
102#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \
103 (1UL << 30) : (1UL << 41))
104#define TASK_SIZE TASK_SIZE_OF(current)
105#define TASK_SIZE_MAX (-PAGE_SIZE)
106
107#define STACK_TOP (test_thread_flag(TIF_31BIT) ? \
108 (1UL << 31) : (1UL << 42))
109#define STACK_TOP_MAX (1UL << 42)
110
111#define HAVE_ARCH_PICK_MMAP_LAYOUT
112
113typedef unsigned int mm_segment_t;
114
115/*
116 * Thread structure
117 */
118struct thread_struct {
119 unsigned int acrs[NUM_ACRS];
120 unsigned long ksp; /* kernel stack pointer */
121 unsigned long user_timer; /* task cputime in user space */
122 unsigned long guest_timer; /* task cputime in kvm guest */
123 unsigned long system_timer; /* task cputime in kernel space */
124 unsigned long hardirq_timer; /* task cputime in hardirq context */
125 unsigned long softirq_timer; /* task cputime in softirq context */
126 unsigned long sys_call_table; /* system call table address */
127 mm_segment_t mm_segment;
128 unsigned long gmap_addr; /* address of last gmap fault. */
129 unsigned int gmap_write_flag; /* gmap fault write indication */
130 unsigned int gmap_int_code; /* int code of last gmap fault */
131 unsigned int gmap_pfault; /* signal of a pending guest pfault */
132 /* Per-thread information related to debugging */
133 struct per_regs per_user; /* User specified PER registers */
134 struct per_event per_event; /* Cause of the last PER trap */
135 unsigned long per_flags; /* Flags to control debug behavior */
136 unsigned int system_call; /* system call number in signal */
137 unsigned long last_break; /* last breaking-event-address. */
138 /* pfault_wait is used to block the process on a pfault event */
139 unsigned long pfault_wait;
140 struct list_head list;
141 /* cpu runtime instrumentation */
142 struct runtime_instr_cb *ri_cb;
143 struct gs_cb *gs_cb; /* Current guarded storage cb */
144 struct gs_cb *gs_bc_cb; /* Broadcast guarded storage cb */
145 unsigned char trap_tdb[256]; /* Transaction abort diagnose block */
146 /*
147 * Warning: 'fpu' is dynamically-sized. It *MUST* be at
148 * the end.
149 */
150 struct fpu fpu; /* FP and VX register save area */
151};
152
153/* Flag to disable transactions. */
154#define PER_FLAG_NO_TE 1UL
155/* Flag to enable random transaction aborts. */
156#define PER_FLAG_TE_ABORT_RAND 2UL
157/* Flag to specify random transaction abort mode:
158 * - abort each transaction at a random instruction before TEND if set.
159 * - abort random transactions at a random instruction if cleared.
160 */
161#define PER_FLAG_TE_ABORT_RAND_TEND 4UL
162
163typedef struct thread_struct thread_struct;
164
165/*
166 * Stack layout of a C stack frame.
167 */
168#ifndef __PACK_STACK
169struct stack_frame {
170 unsigned long back_chain;
171 unsigned long empty1[5];
172 unsigned long gprs[10];
173 unsigned int empty2[8];
174};
175#else
176struct stack_frame {
177 unsigned long empty1[5];
178 unsigned int empty2[8];
179 unsigned long gprs[10];
180 unsigned long back_chain;
181};
182#endif
183
184#define ARCH_MIN_TASKALIGN 8
185
186#define INIT_THREAD { \
187 .ksp = sizeof(init_stack) + (unsigned long) &init_stack, \
188 .fpu.regs = (void *) init_task.thread.fpu.fprs, \
189}
190
191/*
192 * Do necessary setup to start up a new thread.
193 */
194#define start_thread(regs, new_psw, new_stackp) do { \
195 regs->psw.mask = PSW_USER_BITS | PSW_MASK_EA | PSW_MASK_BA; \
196 regs->psw.addr = new_psw; \
197 regs->gprs[15] = new_stackp; \
198 execve_tail(); \
199} while (0)
200
201#define start_thread31(regs, new_psw, new_stackp) do { \
202 regs->psw.mask = PSW_USER_BITS | PSW_MASK_BA; \
203 regs->psw.addr = new_psw; \
204 regs->gprs[15] = new_stackp; \
205 crst_table_downgrade(current->mm); \
206 execve_tail(); \
207} while (0)
208
209/* Forward declaration, a strange C thing */
210struct task_struct;
211struct mm_struct;
212struct seq_file;
213struct pt_regs;
214
215typedef int (*dump_trace_func_t)(void *data, unsigned long address, int reliable);
216void dump_trace(dump_trace_func_t func, void *data,
217 struct task_struct *task, unsigned long sp);
218void show_registers(struct pt_regs *regs);
219
220void show_cacheinfo(struct seq_file *m);
221
222/* Free all resources held by a thread. */
223static inline void release_thread(struct task_struct *tsk) { }
224
225/* Free guarded storage control block */
226void guarded_storage_release(struct task_struct *tsk);
227
228unsigned long get_wchan(struct task_struct *p);
229#define task_pt_regs(tsk) ((struct pt_regs *) \
230 (task_stack_page(tsk) + THREAD_SIZE) - 1)
231#define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr)
232#define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15])
233
234/* Has task runtime instrumentation enabled ? */
235#define is_ri_task(tsk) (!!(tsk)->thread.ri_cb)
236
237static inline unsigned long current_stack_pointer(void)
238{
239 unsigned long sp;
240
241 asm volatile("la %0,0(15)" : "=a" (sp));
242 return sp;
243}
244
245static inline unsigned short stap(void)
246{
247 unsigned short cpu_address;
248
249 asm volatile("stap %0" : "=Q" (cpu_address));
250 return cpu_address;
251}
252
253/*
254 * Give up the time slice of the virtual PU.
255 */
256#define cpu_relax_yield cpu_relax_yield
257void cpu_relax_yield(void);
258
259#define cpu_relax() barrier()
260
261#define ECAG_CACHE_ATTRIBUTE 0
262#define ECAG_CPU_ATTRIBUTE 1
263
264static inline unsigned long __ecag(unsigned int asi, unsigned char parm)
265{
266 unsigned long val;
267
268 asm volatile(".insn rsy,0xeb000000004c,%0,0,0(%1)" /* ecag */
269 : "=d" (val) : "a" (asi << 8 | parm));
270 return val;
271}
272
273static inline void psw_set_key(unsigned int key)
274{
275 asm volatile("spka 0(%0)" : : "d" (key));
276}
277
278/*
279 * Set PSW to specified value.
280 */
281static inline void __load_psw(psw_t psw)
282{
283 asm volatile("lpswe %0" : : "Q" (psw) : "cc");
284}
285
286/*
287 * Set PSW mask to specified value, while leaving the
288 * PSW addr pointing to the next instruction.
289 */
290static inline void __load_psw_mask(unsigned long mask)
291{
292 unsigned long addr;
293 psw_t psw;
294
295 psw.mask = mask;
296
297 asm volatile(
298 " larl %0,1f\n"
299 " stg %0,%O1+8(%R1)\n"
300 " lpswe %1\n"
301 "1:"
302 : "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc");
303}
304
305/*
306 * Extract current PSW mask
307 */
308static inline unsigned long __extract_psw(void)
309{
310 unsigned int reg1, reg2;
311
312 asm volatile("epsw %0,%1" : "=d" (reg1), "=a" (reg2));
313 return (((unsigned long) reg1) << 32) | ((unsigned long) reg2);
314}
315
316static inline void local_mcck_enable(void)
317{
318 __load_psw_mask(__extract_psw() | PSW_MASK_MCHECK);
319}
320
321static inline void local_mcck_disable(void)
322{
323 __load_psw_mask(__extract_psw() & ~PSW_MASK_MCHECK);
324}
325
326/*
327 * Rewind PSW instruction address by specified number of bytes.
328 */
329static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc)
330{
331 unsigned long mask;
332
333 mask = (psw.mask & PSW_MASK_EA) ? -1UL :
334 (psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 :
335 (1UL << 24) - 1;
336 return (psw.addr - ilc) & mask;
337}
338
339/*
340 * Function to stop a processor until the next interrupt occurs
341 */
342void enabled_wait(void);
343
344/*
345 * Function to drop a processor into disabled wait state
346 */
347static inline void __noreturn disabled_wait(unsigned long code)
348{
349 psw_t psw;
350
351 psw.mask = PSW_MASK_BASE | PSW_MASK_WAIT | PSW_MASK_BA | PSW_MASK_EA;
352 psw.addr = code;
353 __load_psw(psw);
354 while (1);
355}
356
357/*
358 * Basic Machine Check/Program Check Handler.
359 */
360
361extern void s390_base_mcck_handler(void);
362extern void s390_base_pgm_handler(void);
363extern void s390_base_ext_handler(void);
364
365extern void (*s390_base_mcck_handler_fn)(void);
366extern void (*s390_base_pgm_handler_fn)(void);
367extern void (*s390_base_ext_handler_fn)(void);
368
369#define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL
370
371extern int memcpy_real(void *, void *, size_t);
372extern void memcpy_absolute(void *, void *, size_t);
373
374#define mem_assign_absolute(dest, val) do { \
375 __typeof__(dest) __tmp = (val); \
376 \
377 BUILD_BUG_ON(sizeof(__tmp) != sizeof(val)); \
378 memcpy_absolute(&(dest), &__tmp, sizeof(__tmp)); \
379} while (0)
380
381extern int s390_isolate_bp(void);
382extern int s390_isolate_bp_guest(void);
383
384#endif /* __ASSEMBLY__ */
385
386#endif /* __ASM_S390_PROCESSOR_H */