[deliverable/linux.git] / include / asm-s390 / 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 <asm/ptrace.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; })

/*
 *  CPU type and hardware bug flags. Kept separately for each CPU.
 *  Members of this structure are referenced in head.S, so think twice
 *  before touching them. [mj]
 */

typedef struct
{
        unsigned int version :  8;
        unsigned int ident   : 24;
        unsigned int machine : 16;
        unsigned int unused  : 16;
} __attribute__ ((packed)) cpuid_t;

struct cpuinfo_S390
{
        cpuid_t  cpu_id;
        __u16    cpu_addr;
        __u16    cpu_nr;
        unsigned long loops_per_jiffy;
        unsigned long *pgd_quick;
#ifdef __s390x__
        unsigned long *pmd_quick;
#endif /* __s390x__ */
        unsigned long *pte_quick;
        unsigned long pgtable_cache_sz;
};

extern void print_cpu_info(struct cpuinfo_S390 *);

/* Lazy FPU handling on uni-processor */
extern struct task_struct *last_task_used_math;

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

# define TASK_SIZE		(0x80000000UL)
# define TASK_UNMAPPED_BASE	(TASK_SIZE / 2)
# define DEFAULT_TASK_SIZE	(0x80000000UL)

#else /* __s390x__ */

# define TASK_SIZE		(test_thread_flag(TIF_31BIT) ? \
					(0x80000000UL) : (0x40000000000UL))
# define TASK_UNMAPPED_BASE	(TASK_SIZE / 2)
# define DEFAULT_TASK_SIZE	(0x40000000000UL)

#endif /* __s390x__ */

#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             */
        unsigned long user_seg;         /* HSTD                             */
	mm_segment_t mm_segment;
        unsigned long prot_addr;        /* address of protection-excep.     */
        unsigned int error_code;        /* error-code of last prog-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

#ifndef __s390x__
# define __SWAPPER_PG_DIR __pa(&swapper_pg_dir[0]) + _SEGMENT_TABLE
#else /* __s390x__ */
# define __SWAPPER_PG_DIR __pa(&swapper_pg_dir[0]) + _REGION_TABLE
#endif /* __s390x__ */

#define INIT_THREAD {{0,{{0},{0},{0},{0},{0},{0},{0},{0},{0},{0},	       \
			    {0},{0},{0},{0},{0},{0}}},			       \
		     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},	       \
		     sizeof(init_stack) + (unsigned long) &init_stack,	       \
		     __SWAPPER_PG_DIR,					       \
		     {0},						       \
		     0,0,0,						       \
		     (per_struct) {{{{0,}}},0,0,0,0,{{0,}}},		       \
		     0, 0						       \
} 

/*
 * Do necessary setup to start up a new thread.
 */
#ifndef __s390x__

#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)

#else /* __s390x__ */

#define start_thread(regs, new_psw, new_stackp) do {            \
	set_fs(USER_DS);					\
        regs->psw.mask  = PSW_USER_BITS;                        \
        regs->psw.addr  = new_psw;                              \
        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;                              \
        regs->gprs[15]  = new_stackp;                           \
} while (0)

#endif /* __s390x__ */

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

/* 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 char *task_show_regs(struct task_struct *task, char *buffer);

extern void show_registers(struct pt_regs *regs);
extern void show_trace(struct task_struct *task, unsigned long *sp);

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();
}

/*
 * 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 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");
#endif /* __s390x__ */
}

/*
 * CPU idle notifier chain.
 */
#define CPU_IDLE	0
#define CPU_NOT_IDLE	1

struct notifier_block;
int register_idle_notifier(struct notifier_block *nb);
int unregister_idle_notifier(struct notifier_block *nb);

#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
1da177e4 LT	16	#include <asm/ptrace.h>
	17
	18	#ifdef __KERNEL__
	19	/*
	20	* Default implementation of macro that returns current
	21	* instruction pointer ("program counter").
	22	*/
94c12cc7	23	#define current_text_addr() ({ void *pc; asm("basr %0,0" : "=a" (pc)); pc; })
1da177e4 LT	24
	25	/*
	26	* CPU type and hardware bug flags. Kept separately for each CPU.
	27	* Members of this structure are referenced in head.S, so think twice
	28	* before touching them. [mj]
	29	*/
	30
	31	typedef struct
	32	{
	33	unsigned int version : 8;
	34	unsigned int ident : 24;
	35	unsigned int machine : 16;
	36	unsigned int unused : 16;
	37	} __attribute__ ((packed)) cpuid_t;
	38
	39	struct cpuinfo_S390
	40	{
	41	cpuid_t cpu_id;
	42	__u16 cpu_addr;
	43	__u16 cpu_nr;
	44	unsigned long loops_per_jiffy;
	45	unsigned long *pgd_quick;
	46	#ifdef __s390x__
	47	unsigned long *pmd_quick;
	48	#endif /* __s390x__ */
	49	unsigned long *pte_quick;
	50	unsigned long pgtable_cache_sz;
	51	};
	52
	53	extern void print_cpu_info(struct cpuinfo_S390 *);
	54
	55	/* Lazy FPU handling on uni-processor */
	56	extern struct task_struct *last_task_used_math;
	57
	58	/*
	59	* User space process size: 2GB for 31 bit, 4TB for 64 bit.
	60	*/
	61	#ifndef __s390x__
	62
	63	# define TASK_SIZE (0x80000000UL)
	64	# define TASK_UNMAPPED_BASE (TASK_SIZE / 2)
	65	# define DEFAULT_TASK_SIZE (0x80000000UL)
	66
	67	#else /* __s390x__ */
	68
	69	# define TASK_SIZE (test_thread_flag(TIF_31BIT) ? \
	70	(0x80000000UL) : (0x40000000000UL))
	71	# define TASK_UNMAPPED_BASE (TASK_SIZE / 2)
	72	# define DEFAULT_TASK_SIZE (0x40000000000UL)
	73
	74	#endif /* __s390x__ */
	75
1da177e4 LT	76	#define HAVE_ARCH_PICK_MMAP_LAYOUT
	77
	78	typedef struct {
	79	__u32 ar4;
	80	} mm_segment_t;
	81
	82	/*
	83	* Thread structure
	84	*/
	85	struct thread_struct {
	86	s390_fp_regs fp_regs;
	87	unsigned int acrs[NUM_ACRS];
	88	unsigned long ksp; /* kernel stack pointer */
	89	unsigned long user_seg; /* HSTD */
	90	mm_segment_t mm_segment;
	91	unsigned long prot_addr; /* address of protection-excep. */
	92	unsigned int error_code; /* error-code of last prog-excep. */
	93	unsigned int trap_no;
	94	per_struct per_info;
	95	/* Used to give failing instruction back to user for ieee exceptions */
	96	unsigned long ieee_instruction_pointer;
	97	/* pfault_wait is used to block the process on a pfault event */
	98	unsigned long pfault_wait;
	99	};
	100
	101	typedef struct thread_struct thread_struct;
	102
	103	/*
	104	* Stack layout of a C stack frame.
	105	*/
	106	#ifndef __PACK_STACK
	107	struct stack_frame {
	108	unsigned long back_chain;
	109	unsigned long empty1[5];
	110	unsigned long gprs[10];
	111	unsigned int empty2[8];
	112	};
	113	#else
	114	struct stack_frame {
	115	unsigned long empty1[5];
	116	unsigned int empty2[8];
	117	unsigned long gprs[10];
	118	unsigned long back_chain;
	119	};
	120	#endif
	121
	122	#define ARCH_MIN_TASKALIGN 8
	123
	124	#ifndef __s390x__
	125	# define __SWAPPER_PG_DIR __pa(&swapper_pg_dir[0]) + _SEGMENT_TABLE
	126	#else /* __s390x__ */
	127	# define __SWAPPER_PG_DIR __pa(&swapper_pg_dir[0]) + _REGION_TABLE
	128	#endif /* __s390x__ */
	129
	130	#define INIT_THREAD {{0,{{0},{0},{0},{0},{0},{0},{0},{0},{0},{0}, \
	131	{0},{0},{0},{0},{0},{0}}}, \
	132	{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, \
	133	sizeof(init_stack) + (unsigned long) &init_stack, \
	134	__SWAPPER_PG_DIR, \
	135	{0}, \
	136	0,0,0, \
	137	(per_struct) {{{{0,}}},0,0,0,0,{{0,}}}, \
	138	0, 0 \
	139	}
140
141	/*
142	* Do necessary setup to start up a new thread.
143	*/
144	#ifndef __s390x__
145
146	#define start_thread(regs, new_psw, new_stackp) do { \
9b241cc8	147	set_fs(USER_DS); \
1da177e4 LT	148	regs->psw.mask = PSW_USER_BITS; \
	149	regs->psw.addr = new_psw \| PSW_ADDR_AMODE; \
	150	regs->gprs[15] = new_stackp ; \
	151	} while (0)
	152
	153	#else /* __s390x__ */
	154
	155	#define start_thread(regs, new_psw, new_stackp) do { \
9b241cc8	156	set_fs(USER_DS); \
1da177e4 LT	157	regs->psw.mask = PSW_USER_BITS; \
	158	regs->psw.addr = new_psw; \
	159	regs->gprs[15] = new_stackp; \
	160	} while (0)
	161
	162	#define start_thread31(regs, new_psw, new_stackp) do { \
9b241cc8	163	set_fs(USER_DS); \
1da177e4 LT	164	regs->psw.mask = PSW_USER32_BITS; \
	165	regs->psw.addr = new_psw; \
	166	regs->gprs[15] = new_stackp; \
	167	} while (0)
	168
	169	#endif /* __s390x__ */
	170
	171	/* Forward declaration, a strange C thing */
	172	struct task_struct;
	173	struct mm_struct;
	174
	175	/* Free all resources held by a thread. */
	176	extern void release_thread(struct task_struct *);
	177	extern int kernel_thread(int (fn)(void ), void * arg, unsigned long flags);
	178
	179	/* Prepare to copy thread state - unlazy all lazy status */
	180	#define prepare_to_copy(tsk) do { } while (0)
	181
	182	/*
	183	* Return saved PC of a blocked thread.
	184	*/
	185	extern unsigned long thread_saved_pc(struct task_struct *t);
	186
	187	/*
	188	* Print register of task into buffer. Used in fs/proc/array.c.
	189	*/
	190	extern char task_show_regs(struct task_struct task, char *buffer);
	191
	192	extern void show_registers(struct pt_regs *regs);
	193	extern void show_trace(struct task_struct task, unsigned long sp);
	194
	195	unsigned long get_wchan(struct task_struct *p);
c7584fb6	196	#define task_pt_regs(tsk) ((struct pt_regs *) \
30af7120	197	(task_stack_page(tsk) + THREAD_SIZE) - 1)
c7584fb6 AV	198	#define KSTK_EIP(tsk) (task_pt_regs(tsk)->psw.addr)
c7584fb6 AV	199	#define KSTK_ESP(tsk) (task_pt_regs(tsk)->gprs[15])
1da177e4 LT	200
	201	/*
	202	* Give up the time slice of the virtual PU.
	203	*/
abdba61a HC	204	static inline void cpu_relax(void)
	205	{
	206	if (MACHINE_HAS_DIAG44)
c48e0913 HC	207	asm volatile("diag 0,0,68");
c48e0913 HC	208	barrier();
abdba61a	209	}
1da177e4	210
77fa2245 HC	211	/*
	212	* Set PSW to specified value.
	213	*/
	214	static inline void __load_psw(psw_t psw)
	215	{
	216	#ifndef __s390x__
94c12cc7	217	asm volatile("lpsw 0(%0)" : : "a" (&psw), "m" (psw) : "cc");
77fa2245	218	#else
94c12cc7	219	asm volatile("lpswe 0(%0)" : : "a" (&psw), "m" (psw) : "cc");
77fa2245 HC	220	#endif
	221	}
	222
1da177e4 LT	223	/*
	224	* Set PSW mask to specified value, while leaving the
	225	* PSW addr pointing to the next instruction.
	226	*/
	227
	228	static inline void __load_psw_mask (unsigned long mask)
	229	{
	230	unsigned long addr;
1da177e4	231	psw_t psw;
77fa2245	232
1da177e4 LT	233	psw.mask = mask;
	234
	235	#ifndef __s390x__
94c12cc7 MS	236	asm volatile(
	237	" basr %0,0\n"
	238	"0: ahi %0,1f-0b\n"
	239	" st %0,4(%1)\n"
	240	" lpsw 0(%1)\n"
1da177e4	241	"1:"
94c12cc7	242	: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc");
1da177e4	243	#else /* __s390x__ */
94c12cc7 MS	244	asm volatile(
	245	" larl %0,1f\n"
	246	" stg %0,8(%1)\n"
	247	" lpswe 0(%1)\n"
1da177e4	248	"1:"
94c12cc7	249	: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc");
1da177e4 LT	250	#endif /* __s390x__ */
	251	}
	252
	253	/*
	254	* Function to stop a processor until an interruption occurred
	255	*/
	256	static inline void enabled_wait(void)
	257	{
77fa2245 HC	258	__load_psw_mask(PSW_BASE_BITS \| PSW_MASK_IO \| PSW_MASK_EXT \|
77fa2245 HC	259	PSW_MASK_MCHECK \| PSW_MASK_WAIT \| PSW_DEFAULT_KEY);
1da177e4 LT	260	}
	261
	262	/*
	263	* Function to drop a processor into disabled wait state
	264	*/
	265
	266	static inline void disabled_wait(unsigned long code)
	267	{
1da177e4	268	unsigned long ctl_buf;
77fa2245	269	psw_t dw_psw;
1da177e4	270
77fa2245 HC	271	dw_psw.mask = PSW_BASE_BITS \| PSW_MASK_WAIT;
77fa2245 HC	272	dw_psw.addr = code;
1da177e4 LT	273	/*
	274	* Store status and then load disabled wait psw,
	275	* the processor is dead afterwards
	276	*/
	277	#ifndef __s390x__
94c12cc7 MS	278	asm volatile(
	279	" stctl 0,0,0(%2)\n"
	280	" ni 0(%2),0xef\n" /* switch off protection */
	281	" lctl 0,0,0(%2)\n"
	282	" stpt 0xd8\n" /* store timer */
	283	" stckc 0xe0\n" /* store clock comparator */
	284	" stpx 0x108\n" /* store prefix register */
	285	" stam 0,15,0x120\n" /* store access registers */
	286	" std 0,0x160\n" /* store f0 */
	287	" std 2,0x168\n" /* store f2 */
	288	" std 4,0x170\n" /* store f4 */
	289	" std 6,0x178\n" /* store f6 */
	290	" stm 0,15,0x180\n" /* store general registers */
	291	" stctl 0,15,0x1c0\n" /* store control registers */
	292	" oi 0x1c0,0x10\n" /* fake protection bit */
	293	" lpsw 0(%1)"
	294	: "=m" (ctl_buf)
	295	: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc");
1da177e4	296	#else /* __s390x__ */
94c12cc7 MS	297	asm volatile(
	298	" stctg 0,0,0(%2)\n"
	299	" ni 4(%2),0xef\n" /* switch off protection */
	300	" lctlg 0,0,0(%2)\n"
	301	" lghi 1,0x1000\n"
	302	" stpt 0x328(1)\n" /* store timer */
	303	" stckc 0x330(1)\n" /* store clock comparator */
	304	" stpx 0x318(1)\n" /* store prefix register */
	305	" stam 0,15,0x340(1)\n"/* store access registers */
	306	" stfpc 0x31c(1)\n" /* store fpu control */
	307	" std 0,0x200(1)\n" /* store f0 */
	308	" std 1,0x208(1)\n" /* store f1 */
	309	" std 2,0x210(1)\n" /* store f2 */
	310	" std 3,0x218(1)\n" /* store f3 */
	311	" std 4,0x220(1)\n" /* store f4 */
	312	" std 5,0x228(1)\n" /* store f5 */
	313	" std 6,0x230(1)\n" /* store f6 */
	314	" std 7,0x238(1)\n" /* store f7 */
	315	" std 8,0x240(1)\n" /* store f8 */
	316	" std 9,0x248(1)\n" /* store f9 */
	317	" std 10,0x250(1)\n" /* store f10 */
	318	" std 11,0x258(1)\n" /* store f11 */
	319	" std 12,0x260(1)\n" /* store f12 */
	320	" std 13,0x268(1)\n" /* store f13 */
	321	" std 14,0x270(1)\n" /* store f14 */
	322	" std 15,0x278(1)\n" /* store f15 */
	323	" stmg 0,15,0x280(1)\n"/* store general registers */
	324	" stctg 0,15,0x380(1)\n"/* store control registers */
	325	" oi 0x384(1),0x10\n"/* fake protection bit */
	326	" lpswe 0(%1)"
	327	: "=m" (ctl_buf)
	328	: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc", "0");
1da177e4 LT	329	#endif /* __s390x__ */
	330	}
	331
	332	/*
	333	* CPU idle notifier chain.
	334	*/
	335	#define CPU_IDLE 0
	336	#define CPU_NOT_IDLE 1
	337
	338	struct notifier_block;
	339	int register_idle_notifier(struct notifier_block *nb);
	340	int unregister_idle_notifier(struct notifier_block *nb);
	341
dfd54cbc HC	342	#define ARCH_LOW_ADDRESS_LIMIT 0x7fffffffUL
dfd54cbc HC	343
1da177e4 LT	344	#endif
1da177e4 LT	345
de1a3f1c MS	346	/*
	347	* Helper macro for exception table entries
	348	*/
	349	#ifndef __s390x__
	350	#define EX_TABLE(_fault,_target) \
	351	".section __ex_table,\"a\"\n" \
	352	" .align 4\n" \
	353	" .long " #_fault "," #_target "\n" \
	354	".previous\n"
	355	#else
	356	#define EX_TABLE(_fault,_target) \
	357	".section __ex_table,\"a\"\n" \
	358	" .align 8\n" \
	359	" .quad " #_fault "," #_target "\n" \
	360	".previous\n"
	361	#endif
	362
1da177e4	363	#endif /* __ASM_S390_PROCESSOR_H */