[mirror_ubuntu-zesty-kernel.git] / arch / s390 / include / asm / processor.h

/*
 *  include/asm-s390/processor.h
 *
 *  S390 version
 *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
 *    Author(s): Hartmut Penner (hp@de.ibm.com),
 *               Martin Schwidefsky (schwidefsky@de.ibm.com)
 *
 *  Derived from "include/asm-i386/processor.h"
 *    Copyright (C) 1994, Linus Torvalds
 */

#ifndef __ASM_S390_PROCESSOR_H
#define __ASM_S390_PROCESSOR_H

#include <linux/linkage.h>
#include <asm/cpu.h>
#include <asm/page.h>
#include <asm/ptrace.h>
#include <asm/setup.h>

#ifdef __KERNEL__
/*
 * Default implementation of macro that returns current
 * instruction pointer ("program counter").
 */
#define current_text_addr() ({ void *pc; asm("basr %0,0" : "=a" (pc)); pc; })

static inline void get_cpu_id(struct cpuid *ptr)
{
	asm volatile("stidp %0" : "=Q" (*ptr));
}

extern void s390_adjust_jiffies(void);
extern int get_cpu_capability(unsigned int *);

/*
 * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
 */
#ifndef __s390x__

#define TASK_SIZE		(1UL << 31)
#define TASK_UNMAPPED_BASE	(1UL << 30)

#else /* __s390x__ */

#define TASK_SIZE_OF(tsk)	((tsk)->mm->context.asce_limit)
#define TASK_UNMAPPED_BASE	(test_thread_flag(TIF_31BIT) ? \
					(1UL << 30) : (1UL << 41))
#define TASK_SIZE		TASK_SIZE_OF(current)

#endif /* __s390x__ */

#ifdef __KERNEL__

#ifndef __s390x__
#define STACK_TOP		(1UL << 31)
#define STACK_TOP_MAX		(1UL << 31)
#else /* __s390x__ */
#define STACK_TOP		(1UL << (test_thread_flag(TIF_31BIT) ? 31:42))
#define STACK_TOP_MAX		(1UL << 42)
#endif /* __s390x__ */


#endif

#define HAVE_ARCH_PICK_MMAP_LAYOUT

typedef struct {
        __u32 ar4;
} mm_segment_t;

/*
 * Thread structure
 */
struct thread_struct {
	s390_fp_regs fp_regs;
	unsigned int  acrs[NUM_ACRS];
        unsigned long ksp;              /* kernel stack pointer             */
	mm_segment_t mm_segment;
        unsigned long prot_addr;        /* address of protection-excep.     */
        unsigned int trap_no;
	unsigned long gmap_addr;	/* address of last gmap fault. */
	struct per_regs per_user;	/* User specified PER registers */
	struct per_event per_event;	/* Cause of the last PER trap */
        /* pfault_wait is used to block the process on a pfault event */
	unsigned long pfault_wait;
	struct list_head list;
};

typedef struct thread_struct thread_struct;

/*
 * Stack layout of a C stack frame.
 */
#ifndef __PACK_STACK
struct stack_frame {
	unsigned long back_chain;
	unsigned long empty1[5];
	unsigned long gprs[10];
	unsigned int  empty2[8];
};
#else
struct stack_frame {
	unsigned long empty1[5];
	unsigned int  empty2[8];
	unsigned long gprs[10];
	unsigned long back_chain;
};
#endif

#define ARCH_MIN_TASKALIGN	8

#define INIT_THREAD {							\
	.ksp = sizeof(init_stack) + (unsigned long) &init_stack,	\
}

/*
 * Do necessary setup to start up a new thread.
 */
#define start_thread(regs, new_psw, new_stackp) do {		\
	regs->psw.mask	= psw_user_bits;			\
	regs->psw.addr	= new_psw | PSW_ADDR_AMODE;		\
	regs->gprs[15]	= new_stackp;				\
} while (0)

#define start_thread31(regs, new_psw, new_stackp) do {		\
	regs->psw.mask	= psw_user32_bits;			\
	regs->psw.addr	= new_psw | PSW_ADDR_AMODE;		\
	regs->gprs[15]	= new_stackp;				\
	crst_table_downgrade(current->mm, 1UL << 31);		\
} while (0)

/* Forward declaration, a strange C thing */
struct task_struct;
struct mm_struct;
struct seq_file;

/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);

/* Prepare to copy thread state - unlazy all lazy status */
#define prepare_to_copy(tsk)	do { } while (0)

/*
 * Return saved PC of a blocked thread.
 */
extern unsigned long thread_saved_pc(struct task_struct *t);

extern void show_code(struct pt_regs *regs);

unsigned long get_wchan(struct task_struct *p);
#define task_pt_regs(tsk) ((struct pt_regs *) \
        (task_stack_page(tsk) + THREAD_SIZE) - 1)
#define KSTK_EIP(tsk)	(task_pt_regs(tsk)->psw.addr)
#define KSTK_ESP(tsk)	(task_pt_regs(tsk)->gprs[15])

/*
 * Give up the time slice of the virtual PU.
 */
static inline void cpu_relax(void)
{
	if (MACHINE_HAS_DIAG44)
		asm volatile("diag 0,0,68");
	barrier();
}

static inline void psw_set_key(unsigned int key)
{
	asm volatile("spka 0(%0)" : : "d" (key));
}

/*
 * Set PSW to specified value.
 */
static inline void __load_psw(psw_t psw)
{
#ifndef __s390x__
	asm volatile("lpsw  %0" : : "Q" (psw) : "cc");
#else
	asm volatile("lpswe %0" : : "Q" (psw) : "cc");
#endif
}

/*
 * Set PSW mask to specified value, while leaving the
 * PSW addr pointing to the next instruction.
 */
static inline void __load_psw_mask (unsigned long mask)
{
	unsigned long addr;
	psw_t psw;

	psw.mask = mask;

#ifndef __s390x__
	asm volatile(
		"	basr	%0,0\n"
		"0:	ahi	%0,1f-0b\n"
		"	st	%0,%O1+4(%R1)\n"
		"	lpsw	%1\n"
		"1:"
		: "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc");
#else /* __s390x__ */
	asm volatile(
		"	larl	%0,1f\n"
		"	stg	%0,%O1+8(%R1)\n"
		"	lpswe	%1\n"
		"1:"
		: "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc");
#endif /* __s390x__ */
}

/*
 * Rewind PSW instruction address by specified number of bytes.
 */
static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc)
{
#ifndef __s390x__
	if (psw.addr & PSW_ADDR_AMODE)
		/* 31 bit mode */
		return (psw.addr - ilc) | PSW_ADDR_AMODE;
	/* 24 bit mode */
	return (psw.addr - ilc) & ((1UL << 24) - 1);
#else
	unsigned long mask;

	mask = (psw.mask & PSW_MASK_EA) ? -1UL :
	       (psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 :
					  (1UL << 24) - 1;
	return (psw.addr - ilc) & mask;
#endif
}
 
/*
 * Function to stop a processor until an interruption occurred
 */
static inline void enabled_wait(void)
{
	__load_psw_mask(PSW_BASE_BITS | PSW_MASK_IO | PSW_MASK_EXT |
			PSW_MASK_MCHECK | PSW_MASK_WAIT | PSW_DEFAULT_KEY);
}

/*
 * Function to drop a processor into disabled wait state
 */

static inline void ATTRIB_NORET disabled_wait(unsigned long code)
{
        unsigned long ctl_buf;
        psw_t dw_psw;

        dw_psw.mask = PSW_BASE_BITS | PSW_MASK_WAIT;
        dw_psw.addr = code;
        /* 
         * Store status and then load disabled wait psw,
         * the processor is dead afterwards
         */
#ifndef __s390x__
	asm volatile(
		"	stctl	0,0,0(%2)\n"
		"	ni	0(%2),0xef\n"	/* switch off protection */
		"	lctl	0,0,0(%2)\n"
		"	stpt	0xd8\n"		/* store timer */
		"	stckc	0xe0\n"		/* store clock comparator */
		"	stpx	0x108\n"	/* store prefix register */
		"	stam	0,15,0x120\n"	/* store access registers */
		"	std	0,0x160\n"	/* store f0 */
		"	std	2,0x168\n"	/* store f2 */
		"	std	4,0x170\n"	/* store f4 */
		"	std	6,0x178\n"	/* store f6 */
		"	stm	0,15,0x180\n"	/* store general registers */
		"	stctl	0,15,0x1c0\n"	/* store control registers */
		"	oi	0x1c0,0x10\n"	/* fake protection bit */
		"	lpsw	0(%1)"
		: "=m" (ctl_buf)
		: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc");
#else /* __s390x__ */
	asm volatile(
		"	stctg	0,0,0(%2)\n"
		"	ni	4(%2),0xef\n"	/* switch off protection */
		"	lctlg	0,0,0(%2)\n"
		"	lghi	1,0x1000\n"
		"	stpt	0x328(1)\n"	/* store timer */
		"	stckc	0x330(1)\n"	/* store clock comparator */
		"	stpx	0x318(1)\n"	/* store prefix register */
		"	stam	0,15,0x340(1)\n"/* store access registers */
		"	stfpc	0x31c(1)\n"	/* store fpu control */
		"	std	0,0x200(1)\n"	/* store f0 */
		"	std	1,0x208(1)\n"	/* store f1 */
		"	std	2,0x210(1)\n"	/* store f2 */
		"	std	3,0x218(1)\n"	/* store f3 */
		"	std	4,0x220(1)\n"	/* store f4 */
		"	std	5,0x228(1)\n"	/* store f5 */
		"	std	6,0x230(1)\n"	/* store f6 */
		"	std	7,0x238(1)\n"	/* store f7 */
		"	std	8,0x240(1)\n"	/* store f8 */
		"	std	9,0x248(1)\n"	/* store f9 */
		"	std	10,0x250(1)\n"	/* store f10 */
		"	std	11,0x258(1)\n"	/* store f11 */
		"	std	12,0x260(1)\n"	/* store f12 */
		"	std	13,0x268(1)\n"	/* store f13 */
		"	std	14,0x270(1)\n"	/* store f14 */
		"	std	15,0x278(1)\n"	/* store f15 */
		"	stmg	0,15,0x280(1)\n"/* store general registers */
		"	stctg	0,15,0x380(1)\n"/* store control registers */
		"	oi	0x384(1),0x10\n"/* fake protection bit */
		"	lpswe	0(%1)"
		: "=m" (ctl_buf)
		: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc", "0", "1");
#endif /* __s390x__ */
	while (1);
}

/*
 * Basic Machine Check/Program Check Handler.
 */

extern void s390_base_mcck_handler(void);
extern void s390_base_pgm_handler(void);
extern void s390_base_ext_handler(void);

extern void (*s390_base_mcck_handler_fn)(void);
extern void (*s390_base_pgm_handler_fn)(void);
extern void (*s390_base_ext_handler_fn)(void);

#define ARCH_LOW_ADDRESS_LIMIT	0x7fffffffUL

#endif

/*
 * Helper macro for exception table entries
 */
#ifndef __s390x__
#define EX_TABLE(_fault,_target)			\
	".section __ex_table,\"a\"\n"			\
	"	.align 4\n"				\
	"	.long  " #_fault "," #_target "\n"	\
	".previous\n"
#else
#define EX_TABLE(_fault,_target)			\
	".section __ex_table,\"a\"\n"			\
	"	.align 8\n"				\
	"	.quad  " #_fault "," #_target "\n"	\
	".previous\n"
#endif

#endif                                 /* __ASM_S390_PROCESSOR_H           */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* include/asm-s390/processor.h
	3	*
	4	* S390 version
	5	* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
	6	* Author(s): Hartmut Penner (hp@de.ibm.com),
	7	* Martin Schwidefsky (schwidefsky@de.ibm.com)
	8	*
	9	* Derived from "include/asm-i386/processor.h"
	10	* Copyright (C) 1994, Linus Torvalds
	11	*/
	12
	13	#ifndef __ASM_S390_PROCESSOR_H
	14	#define __ASM_S390_PROCESSOR_H
	15
edd53787	16	#include <linux/linkage.h>
e86a6ed6	17	#include <asm/cpu.h>
25097bf1	18	#include <asm/page.h>
1da177e4	19	#include <asm/ptrace.h>
25097bf1	20	#include <asm/setup.h>
1da177e4 LT	21
	22	#ifdef __KERNEL__
	23	/*
	24	* Default implementation of macro that returns current
	25	* instruction pointer ("program counter").
	26	*/
94c12cc7	27	#define current_text_addr() ({ void *pc; asm("basr %0,0" : "=a" (pc)); pc; })
1da177e4	28
e86a6ed6	29	static inline void get_cpu_id(struct cpuid *ptr)
72960a02	30	{
987bcdac	31	asm volatile("stidp %0" : "=Q" (*ptr));
72960a02 MH	32	}
72960a02 MH	33
31ee4b2f	34	extern void s390_adjust_jiffies(void);
2fc2d1e9	35	extern int get_cpu_capability(unsigned int *);
1da177e4	36
1da177e4	37	/*
f481bfaf	38	* User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
1da177e4 LT	39	*/
	40	#ifndef __s390x__
	41
5a216a20 MS	42	#define TASK_SIZE (1UL << 31)
5a216a20 MS	43	#define TASK_UNMAPPED_BASE (1UL << 30)
1da177e4 LT	44
	45	#else /* __s390x__ */
	46
f481bfaf	47	#define TASK_SIZE_OF(tsk) ((tsk)->mm->context.asce_limit)
5a216a20 MS	48	#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \
	49	(1UL << 30) : (1UL << 41))
	50	#define TASK_SIZE TASK_SIZE_OF(current)
1da177e4 LT	51
	52	#endif /* __s390x__ */
	53
922a70d3 DH	54	#ifdef __KERNEL__
922a70d3 DH	55
5a216a20 MS	56	#ifndef __s390x__
5a216a20 MS	57	#define STACK_TOP (1UL << 31)
6252d702	58	#define STACK_TOP_MAX (1UL << 31)
5a216a20	59	#else /* __s390x__ */
6252d702 MS	60	#define STACK_TOP (1UL << (test_thread_flag(TIF_31BIT) ? 31:42))
6252d702 MS	61	#define STACK_TOP_MAX (1UL << 42)
5a216a20 MS	62	#endif /* __s390x__ */
5a216a20 MS	63
922a70d3 DH	64
	65	#endif
	66
1da177e4 LT	67	#define HAVE_ARCH_PICK_MMAP_LAYOUT
	68
	69	typedef struct {
	70	__u32 ar4;
	71	} mm_segment_t;
	72
	73	/*
	74	* Thread structure
	75	*/
	76	struct thread_struct {
	77	s390_fp_regs fp_regs;
	78	unsigned int acrs[NUM_ACRS];
	79	unsigned long ksp; /* kernel stack pointer */
1da177e4 LT	80	mm_segment_t mm_segment;
1da177e4 LT	81	unsigned long prot_addr; /* address of protection-excep. */
1da177e4	82	unsigned int trap_no;
e5992f2e	83	unsigned long gmap_addr; /* address of last gmap fault. */
5e9a2692 MS	84	struct per_regs per_user; /* User specified PER registers */
5e9a2692 MS	85	struct per_event per_event; /* Cause of the last PER trap */
1da177e4 LT	86	/* pfault_wait is used to block the process on a pfault event */
1da177e4 LT	87	unsigned long pfault_wait;
f2db2e6c	88	struct list_head list;
1da177e4 LT	89	};
	90
	91	typedef struct thread_struct thread_struct;
	92
	93	/*
	94	* Stack layout of a C stack frame.
	95	*/
	96	#ifndef __PACK_STACK
	97	struct stack_frame {
	98	unsigned long back_chain;
	99	unsigned long empty1[5];
	100	unsigned long gprs[10];
	101	unsigned int empty2[8];
	102	};
	103	#else
	104	struct stack_frame {
	105	unsigned long empty1[5];
	106	unsigned int empty2[8];
	107	unsigned long gprs[10];
	108	unsigned long back_chain;
	109	};
	110	#endif
	111
	112	#define ARCH_MIN_TASKALIGN 8
	113
6f3fa3f0 MS	114	#define INIT_THREAD { \
	115	.ksp = sizeof(init_stack) + (unsigned long) &init_stack, \
	116	}
1da177e4 LT	117
	118	/*
	119	* Do necessary setup to start up a new thread.
	120	*/
63506c41	121	#define start_thread(regs, new_psw, new_stackp) do { \
c1821c2e	122	regs->psw.mask = psw_user_bits; \
63506c41 MS	123	regs->psw.addr = new_psw \| PSW_ADDR_AMODE; \
	124	regs->gprs[15] = new_stackp; \
	125	} while (0)
	126
	127	#define start_thread31(regs, new_psw, new_stackp) do { \
63506c41 MS	128	regs->psw.mask = psw_user32_bits; \
	129	regs->psw.addr = new_psw \| PSW_ADDR_AMODE; \
	130	regs->gprs[15] = new_stackp; \
	131	crst_table_downgrade(current->mm, 1UL << 31); \
1da177e4 LT	132	} while (0)
1da177e4 LT	133
1da177e4 LT	134	/* Forward declaration, a strange C thing */
	135	struct task_struct;
	136	struct mm_struct;
df5f8314	137	struct seq_file;
1da177e4 LT	138
	139	/* Free all resources held by a thread. */
	140	extern void release_thread(struct task_struct *);
	141	extern int kernel_thread(int (fn)(void ), void * arg, unsigned long flags);
	142
	143	/* Prepare to copy thread state - unlazy all lazy status */
	144	#define prepare_to_copy(tsk) do { } while (0)
	145
	146	/*
	147	* Return saved PC of a blocked thread.
	148	*/
	149	extern unsigned long thread_saved_pc(struct task_struct *t);
	150
bb11e3bd	151	extern void show_code(struct pt_regs *regs);
1da177e4 LT	152
1da177e4 LT	153	unsigned long get_wchan(struct task_struct *p);
c7584fb6	154	#define task_pt_regs(tsk) ((struct pt_regs *) \
30af7120	155	(task_stack_page(tsk) + THREAD_SIZE) - 1)
c7584fb6 AV	156	#define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr)
c7584fb6 AV	157	#define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15])
1da177e4 LT	158
	159	/*
	160	* Give up the time slice of the virtual PU.
	161	*/
abdba61a HC	162	static inline void cpu_relax(void)
	163	{
	164	if (MACHINE_HAS_DIAG44)
c48e0913 HC	165	asm volatile("diag 0,0,68");
c48e0913 HC	166	barrier();
abdba61a	167	}
1da177e4	168
dc74d7f9 HC	169	static inline void psw_set_key(unsigned int key)
	170	{
	171	asm volatile("spka 0(%0)" : : "d" (key));
	172	}
	173
77fa2245 HC	174	/*
	175	* Set PSW to specified value.
	176	*/
	177	static inline void __load_psw(psw_t psw)
	178	{
	179	#ifndef __s390x__
987bcdac	180	asm volatile("lpsw %0" : : "Q" (psw) : "cc");
77fa2245	181	#else
987bcdac	182	asm volatile("lpswe %0" : : "Q" (psw) : "cc");
77fa2245 HC	183	#endif
	184	}
	185
1da177e4 LT	186	/*
	187	* Set PSW mask to specified value, while leaving the
	188	* PSW addr pointing to the next instruction.
	189	*/
1da177e4 LT	190	static inline void __load_psw_mask (unsigned long mask)
	191	{
	192	unsigned long addr;
1da177e4	193	psw_t psw;
77fa2245	194
1da177e4 LT	195	psw.mask = mask;
	196
	197	#ifndef __s390x__
94c12cc7 MS	198	asm volatile(
	199	" basr %0,0\n"
	200	"0: ahi %0,1f-0b\n"
987bcdac MS	201	" st %0,%O1+4(%R1)\n"
987bcdac MS	202	" lpsw %1\n"
1da177e4	203	"1:"
987bcdac	204	: "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc");
1da177e4	205	#else /* __s390x__ */
94c12cc7 MS	206	asm volatile(
94c12cc7 MS	207	" larl %0,1f\n"
987bcdac MS	208	" stg %0,%O1+8(%R1)\n"
987bcdac MS	209	" lpswe %1\n"
1da177e4	210	"1:"
987bcdac	211	: "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc");
1da177e4 LT	212	#endif /* __s390x__ */
1da177e4 LT	213	}
ccf45caf MS	214
	215	/*
	216	* Rewind PSW instruction address by specified number of bytes.
	217	*/
	218	static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc)
	219	{
	220	#ifndef __s390x__
	221	if (psw.addr & PSW_ADDR_AMODE)
	222	/* 31 bit mode */
	223	return (psw.addr - ilc) \| PSW_ADDR_AMODE;
	224	/* 24 bit mode */
	225	return (psw.addr - ilc) & ((1UL << 24) - 1);
	226	#else
	227	unsigned long mask;
	228
	229	mask = (psw.mask & PSW_MASK_EA) ? -1UL :
	230	(psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 :
	231	(1UL << 24) - 1;
	232	return (psw.addr - ilc) & mask;
	233	#endif
	234	}
1da177e4 LT	235
	236	/*
	237	* Function to stop a processor until an interruption occurred
	238	*/
	239	static inline void enabled_wait(void)
	240	{
77fa2245 HC	241	__load_psw_mask(PSW_BASE_BITS \| PSW_MASK_IO \| PSW_MASK_EXT \|
77fa2245 HC	242	PSW_MASK_MCHECK \| PSW_MASK_WAIT \| PSW_DEFAULT_KEY);
1da177e4 LT	243	}
	244
	245	/*
	246	* Function to drop a processor into disabled wait state
	247	*/
	248
edd53787	249	static inline void ATTRIB_NORET disabled_wait(unsigned long code)
1da177e4	250	{
1da177e4	251	unsigned long ctl_buf;
77fa2245	252	psw_t dw_psw;
1da177e4	253
77fa2245 HC	254	dw_psw.mask = PSW_BASE_BITS \| PSW_MASK_WAIT;
77fa2245 HC	255	dw_psw.addr = code;
1da177e4 LT	256	/*
	257	* Store status and then load disabled wait psw,
	258	* the processor is dead afterwards
	259	*/
	260	#ifndef __s390x__
94c12cc7 MS	261	asm volatile(
	262	" stctl 0,0,0(%2)\n"
	263	" ni 0(%2),0xef\n" /* switch off protection */
	264	" lctl 0,0,0(%2)\n"
	265	" stpt 0xd8\n" /* store timer */
	266	" stckc 0xe0\n" /* store clock comparator */
	267	" stpx 0x108\n" /* store prefix register */
	268	" stam 0,15,0x120\n" /* store access registers */
	269	" std 0,0x160\n" /* store f0 */
	270	" std 2,0x168\n" /* store f2 */
	271	" std 4,0x170\n" /* store f4 */
	272	" std 6,0x178\n" /* store f6 */
	273	" stm 0,15,0x180\n" /* store general registers */
	274	" stctl 0,15,0x1c0\n" /* store control registers */
	275	" oi 0x1c0,0x10\n" /* fake protection bit */
	276	" lpsw 0(%1)"
	277	: "=m" (ctl_buf)
	278	: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc");
1da177e4	279	#else /* __s390x__ */
94c12cc7 MS	280	asm volatile(
	281	" stctg 0,0,0(%2)\n"
	282	" ni 4(%2),0xef\n" /* switch off protection */
	283	" lctlg 0,0,0(%2)\n"
	284	" lghi 1,0x1000\n"
	285	" stpt 0x328(1)\n" /* store timer */
	286	" stckc 0x330(1)\n" /* store clock comparator */
	287	" stpx 0x318(1)\n" /* store prefix register */
	288	" stam 0,15,0x340(1)\n"/* store access registers */
	289	" stfpc 0x31c(1)\n" /* store fpu control */
	290	" std 0,0x200(1)\n" /* store f0 */
	291	" std 1,0x208(1)\n" /* store f1 */
	292	" std 2,0x210(1)\n" /* store f2 */
	293	" std 3,0x218(1)\n" /* store f3 */
	294	" std 4,0x220(1)\n" /* store f4 */
	295	" std 5,0x228(1)\n" /* store f5 */
	296	" std 6,0x230(1)\n" /* store f6 */
	297	" std 7,0x238(1)\n" /* store f7 */
	298	" std 8,0x240(1)\n" /* store f8 */
	299	" std 9,0x248(1)\n" /* store f9 */
	300	" std 10,0x250(1)\n" /* store f10 */
	301	" std 11,0x258(1)\n" /* store f11 */
	302	" std 12,0x260(1)\n" /* store f12 */
	303	" std 13,0x268(1)\n" /* store f13 */
	304	" std 14,0x270(1)\n" /* store f14 */
	305	" std 15,0x278(1)\n" /* store f15 */
	306	" stmg 0,15,0x280(1)\n"/* store general registers */
	307	" stctg 0,15,0x380(1)\n"/* store control registers */
	308	" oi 0x384(1),0x10\n"/* fake protection bit */
	309	" lpswe 0(%1)"
	310	: "=m" (ctl_buf)
bdd42b28	311	: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc", "0", "1");
1da177e4	312	#endif /* __s390x__ */
edd53787	313	while (1);
1da177e4 LT	314	}
1da177e4 LT	315
ab14de6c HC	316	/*
	317	* Basic Machine Check/Program Check Handler.
	318	*/
	319
	320	extern void s390_base_mcck_handler(void);
	321	extern void s390_base_pgm_handler(void);
	322	extern void s390_base_ext_handler(void);
	323
	324	extern void (*s390_base_mcck_handler_fn)(void);
	325	extern void (*s390_base_pgm_handler_fn)(void);
	326	extern void (*s390_base_ext_handler_fn)(void);
	327
dfd54cbc HC	328	#define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL
dfd54cbc HC	329
1da177e4 LT	330	#endif
1da177e4 LT	331
de1a3f1c MS	332	/*
	333	* Helper macro for exception table entries
	334	*/
	335	#ifndef __s390x__
	336	#define EX_TABLE(_fault,_target) \
	337	".section __ex_table,\"a\"\n" \
	338	" .align 4\n" \
	339	" .long " #_fault "," #_target "\n" \
	340	".previous\n"
	341	#else
	342	#define EX_TABLE(_fault,_target) \
	343	".section __ex_table,\"a\"\n" \
	344	" .align 8\n" \
	345	" .quad " #_fault "," #_target "\n" \
	346	".previous\n"
	347	#endif
	348
1da177e4	349	#endif /* __ASM_S390_PROCESSOR_H */