[net-next-2.6.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(%1)" : "=m" (*ptr) : "a" (ptr));
}

extern void s390_adjust_jiffies(void);
extern void print_cpu_info(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;
        per_struct per_info;
	/* Used to give failing instruction back to user for ieee exceptions */
	unsigned long ieee_instruction_pointer; 
        /* pfault_wait is used to block the process on a pfault event */
	unsigned long pfault_wait;
};

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 {		\
	set_fs(USER_DS);					\
	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 {		\
	set_fs(USER_DS);					\
	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);

/*
 * Print register of task into buffer. Used in fs/proc/array.c.
 */
extern void task_show_regs(struct seq_file *m, struct task_struct *task);

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(%0)" : : "a" (&psw), "m" (psw) : "cc");
#else
	asm volatile("lpswe 0(%0)" : : "a" (&psw), "m" (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	%0,4(%1)\n"
		"	lpsw	0(%1)\n"
		"1:"
		: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc");
#else /* __s390x__ */
	asm volatile(
		"	larl	%0,1f\n"
		"	stg	%0,8(%1)\n"
		"	lpswe	0(%1)\n"
		"1:"
		: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc");
#endif /* __s390x__ */
}
 
/*
 * 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 MH	30	{
	31	asm volatile("stidp 0(%1)" : "=m" (*ptr) : "a" (ptr));
	32	}
	33
31ee4b2f	34	extern void s390_adjust_jiffies(void);
7b468488	35	extern void print_cpu_info(void);
2fc2d1e9	36	extern int get_cpu_capability(unsigned int *);
1da177e4	37
1da177e4	38	/*
f481bfaf	39	* User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
1da177e4 LT	40	*/
	41	#ifndef __s390x__
	42
5a216a20 MS	43	#define TASK_SIZE (1UL << 31)
5a216a20 MS	44	#define TASK_UNMAPPED_BASE (1UL << 30)
1da177e4 LT	45
	46	#else /* __s390x__ */
	47
f481bfaf	48	#define TASK_SIZE_OF(tsk) ((tsk)->mm->context.asce_limit)
5a216a20 MS	49	#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \
	50	(1UL << 30) : (1UL << 41))
	51	#define TASK_SIZE TASK_SIZE_OF(current)
1da177e4 LT	52
	53	#endif /* __s390x__ */
	54
922a70d3 DH	55	#ifdef __KERNEL__
922a70d3 DH	56
5a216a20 MS	57	#ifndef __s390x__
5a216a20 MS	58	#define STACK_TOP (1UL << 31)
6252d702	59	#define STACK_TOP_MAX (1UL << 31)
5a216a20	60	#else /* __s390x__ */
6252d702 MS	61	#define STACK_TOP (1UL << (test_thread_flag(TIF_31BIT) ? 31:42))
6252d702 MS	62	#define STACK_TOP_MAX (1UL << 42)
5a216a20 MS	63	#endif /* __s390x__ */
5a216a20 MS	64
922a70d3 DH	65
	66	#endif
	67
1da177e4 LT	68	#define HAVE_ARCH_PICK_MMAP_LAYOUT
	69
	70	typedef struct {
	71	__u32 ar4;
	72	} mm_segment_t;
	73
	74	/*
	75	* Thread structure
	76	*/
	77	struct thread_struct {
	78	s390_fp_regs fp_regs;
	79	unsigned int acrs[NUM_ACRS];
	80	unsigned long ksp; /* kernel stack pointer */
1da177e4 LT	81	mm_segment_t mm_segment;
1da177e4 LT	82	unsigned long prot_addr; /* address of protection-excep. */
1da177e4 LT	83	unsigned int trap_no;
	84	per_struct per_info;
	85	/* Used to give failing instruction back to user for ieee exceptions */
	86	unsigned long ieee_instruction_pointer;
	87	/* pfault_wait is used to block the process on a pfault event */
	88	unsigned long pfault_wait;
	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 { \
9b241cc8	122	set_fs(USER_DS); \
c1821c2e	123	regs->psw.mask = psw_user_bits; \
63506c41 MS	124	regs->psw.addr = new_psw \| PSW_ADDR_AMODE; \
	125	regs->gprs[15] = new_stackp; \
	126	} while (0)
	127
	128	#define start_thread31(regs, new_psw, new_stackp) do { \
	129	set_fs(USER_DS); \
	130	regs->psw.mask = psw_user32_bits; \
	131	regs->psw.addr = new_psw \| PSW_ADDR_AMODE; \
	132	regs->gprs[15] = new_stackp; \
	133	crst_table_downgrade(current->mm, 1UL << 31); \
1da177e4 LT	134	} while (0)
1da177e4 LT	135
1da177e4 LT	136	/* Forward declaration, a strange C thing */
	137	struct task_struct;
	138	struct mm_struct;
df5f8314	139	struct seq_file;
1da177e4 LT	140
	141	/* Free all resources held by a thread. */
	142	extern void release_thread(struct task_struct *);
	143	extern int kernel_thread(int (fn)(void ), void * arg, unsigned long flags);
	144
	145	/* Prepare to copy thread state - unlazy all lazy status */
	146	#define prepare_to_copy(tsk) do { } while (0)
	147
	148	/*
	149	* Return saved PC of a blocked thread.
	150	*/
	151	extern unsigned long thread_saved_pc(struct task_struct *t);
	152
	153	/*
	154	* Print register of task into buffer. Used in fs/proc/array.c.
	155	*/
df5f8314	156	extern void task_show_regs(struct seq_file m, struct task_struct task);
1da177e4	157
bb11e3bd	158	extern void show_code(struct pt_regs *regs);
1da177e4 LT	159
1da177e4 LT	160	unsigned long get_wchan(struct task_struct *p);
c7584fb6	161	#define task_pt_regs(tsk) ((struct pt_regs *) \
30af7120	162	(task_stack_page(tsk) + THREAD_SIZE) - 1)
c7584fb6 AV	163	#define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr)
c7584fb6 AV	164	#define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15])
1da177e4 LT	165
	166	/*
	167	* Give up the time slice of the virtual PU.
	168	*/
abdba61a HC	169	static inline void cpu_relax(void)
	170	{
	171	if (MACHINE_HAS_DIAG44)
c48e0913 HC	172	asm volatile("diag 0,0,68");
c48e0913 HC	173	barrier();
abdba61a	174	}
1da177e4	175
dc74d7f9 HC	176	static inline void psw_set_key(unsigned int key)
	177	{
	178	asm volatile("spka 0(%0)" : : "d" (key));
	179	}
	180
77fa2245 HC	181	/*
	182	* Set PSW to specified value.
	183	*/
	184	static inline void __load_psw(psw_t psw)
	185	{
	186	#ifndef __s390x__
94c12cc7	187	asm volatile("lpsw 0(%0)" : : "a" (&psw), "m" (psw) : "cc");
77fa2245	188	#else
94c12cc7	189	asm volatile("lpswe 0(%0)" : : "a" (&psw), "m" (psw) : "cc");
77fa2245 HC	190	#endif
	191	}
	192
1da177e4 LT	193	/*
	194	* Set PSW mask to specified value, while leaving the
	195	* PSW addr pointing to the next instruction.
	196	*/
	197
	198	static inline void __load_psw_mask (unsigned long mask)
	199	{
	200	unsigned long addr;
1da177e4	201	psw_t psw;
77fa2245	202
1da177e4 LT	203	psw.mask = mask;
	204
	205	#ifndef __s390x__
94c12cc7 MS	206	asm volatile(
	207	" basr %0,0\n"
	208	"0: ahi %0,1f-0b\n"
	209	" st %0,4(%1)\n"
	210	" lpsw 0(%1)\n"
1da177e4	211	"1:"
94c12cc7	212	: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc");
1da177e4	213	#else /* __s390x__ */
94c12cc7 MS	214	asm volatile(
	215	" larl %0,1f\n"
	216	" stg %0,8(%1)\n"
	217	" lpswe 0(%1)\n"
1da177e4	218	"1:"
94c12cc7	219	: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc");
1da177e4 LT	220	#endif /* __s390x__ */
	221	}
	222
	223	/*
	224	* Function to stop a processor until an interruption occurred
	225	*/
	226	static inline void enabled_wait(void)
	227	{
77fa2245 HC	228	__load_psw_mask(PSW_BASE_BITS \| PSW_MASK_IO \| PSW_MASK_EXT \|
77fa2245 HC	229	PSW_MASK_MCHECK \| PSW_MASK_WAIT \| PSW_DEFAULT_KEY);
1da177e4 LT	230	}
	231
	232	/*
	233	* Function to drop a processor into disabled wait state
	234	*/
	235
edd53787	236	static inline void ATTRIB_NORET disabled_wait(unsigned long code)
1da177e4	237	{
1da177e4	238	unsigned long ctl_buf;
77fa2245	239	psw_t dw_psw;
1da177e4	240
77fa2245 HC	241	dw_psw.mask = PSW_BASE_BITS \| PSW_MASK_WAIT;
77fa2245 HC	242	dw_psw.addr = code;
1da177e4 LT	243	/*
	244	* Store status and then load disabled wait psw,
	245	* the processor is dead afterwards
	246	*/
	247	#ifndef __s390x__
94c12cc7 MS	248	asm volatile(
	249	" stctl 0,0,0(%2)\n"
	250	" ni 0(%2),0xef\n" /* switch off protection */
	251	" lctl 0,0,0(%2)\n"
	252	" stpt 0xd8\n" /* store timer */
	253	" stckc 0xe0\n" /* store clock comparator */
	254	" stpx 0x108\n" /* store prefix register */
	255	" stam 0,15,0x120\n" /* store access registers */
	256	" std 0,0x160\n" /* store f0 */
	257	" std 2,0x168\n" /* store f2 */
	258	" std 4,0x170\n" /* store f4 */
	259	" std 6,0x178\n" /* store f6 */
	260	" stm 0,15,0x180\n" /* store general registers */
	261	" stctl 0,15,0x1c0\n" /* store control registers */
	262	" oi 0x1c0,0x10\n" /* fake protection bit */
	263	" lpsw 0(%1)"
	264	: "=m" (ctl_buf)
	265	: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc");
1da177e4	266	#else /* __s390x__ */
94c12cc7 MS	267	asm volatile(
	268	" stctg 0,0,0(%2)\n"
	269	" ni 4(%2),0xef\n" /* switch off protection */
	270	" lctlg 0,0,0(%2)\n"
	271	" lghi 1,0x1000\n"
	272	" stpt 0x328(1)\n" /* store timer */
	273	" stckc 0x330(1)\n" /* store clock comparator */
	274	" stpx 0x318(1)\n" /* store prefix register */
	275	" stam 0,15,0x340(1)\n"/* store access registers */
	276	" stfpc 0x31c(1)\n" /* store fpu control */
	277	" std 0,0x200(1)\n" /* store f0 */
	278	" std 1,0x208(1)\n" /* store f1 */
	279	" std 2,0x210(1)\n" /* store f2 */
	280	" std 3,0x218(1)\n" /* store f3 */
	281	" std 4,0x220(1)\n" /* store f4 */
	282	" std 5,0x228(1)\n" /* store f5 */
	283	" std 6,0x230(1)\n" /* store f6 */
	284	" std 7,0x238(1)\n" /* store f7 */
	285	" std 8,0x240(1)\n" /* store f8 */
	286	" std 9,0x248(1)\n" /* store f9 */
	287	" std 10,0x250(1)\n" /* store f10 */
	288	" std 11,0x258(1)\n" /* store f11 */
	289	" std 12,0x260(1)\n" /* store f12 */
	290	" std 13,0x268(1)\n" /* store f13 */
	291	" std 14,0x270(1)\n" /* store f14 */
	292	" std 15,0x278(1)\n" /* store f15 */
	293	" stmg 0,15,0x280(1)\n"/* store general registers */
	294	" stctg 0,15,0x380(1)\n"/* store control registers */
	295	" oi 0x384(1),0x10\n"/* fake protection bit */
	296	" lpswe 0(%1)"
	297	: "=m" (ctl_buf)
bdd42b28	298	: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc", "0", "1");
1da177e4	299	#endif /* __s390x__ */
edd53787	300	while (1);
1da177e4 LT	301	}
1da177e4 LT	302
ab14de6c HC	303	/*
	304	* Basic Machine Check/Program Check Handler.
	305	*/
	306
	307	extern void s390_base_mcck_handler(void);
	308	extern void s390_base_pgm_handler(void);
	309	extern void s390_base_ext_handler(void);
	310
	311	extern void (*s390_base_mcck_handler_fn)(void);
	312	extern void (*s390_base_pgm_handler_fn)(void);
	313	extern void (*s390_base_ext_handler_fn)(void);
	314
dfd54cbc HC	315	#define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL
dfd54cbc HC	316
1da177e4 LT	317	#endif
1da177e4 LT	318
de1a3f1c MS	319	/*
	320	* Helper macro for exception table entries
	321	*/
	322	#ifndef __s390x__
	323	#define EX_TABLE(_fault,_target) \
	324	".section __ex_table,\"a\"\n" \
	325	" .align 4\n" \
	326	" .long " #_fault "," #_target "\n" \
	327	".previous\n"
	328	#else
	329	#define EX_TABLE(_fault,_target) \
	330	".section __ex_table,\"a\"\n" \
	331	" .align 8\n" \
	332	" .quad " #_fault "," #_target "\n" \
	333	".previous\n"
	334	#endif
	335
1da177e4	336	#endif /* __ASM_S390_PROCESSOR_H */