[mirror_ubuntu-bionic-kernel.git] / drivers / s390 / char / sclp.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright IBM Corp. 1999,2012
 *
 * Author(s): Martin Peschke <mpeschke@de.ibm.com>
 *	      Martin Schwidefsky <schwidefsky@de.ibm.com>
 */

#ifndef __SCLP_H__
#define __SCLP_H__

#include <linux/types.h>
#include <linux/list.h>
#include <asm/sclp.h>
#include <asm/ebcdic.h>

/* maximum number of pages concerning our own memory management */
#define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
#define SCLP_CONSOLE_PAGES	6

#define SCLP_EVTYP_MASK(T)	(1U << (32 - (T)))

#define EVTYP_OPCMD		0x01
#define EVTYP_MSG		0x02
#define EVTYP_CONFMGMDATA	0x04
#define EVTYP_DIAG_TEST		0x07
#define EVTYP_STATECHANGE	0x08
#define EVTYP_PMSGCMD		0x09
#define EVTYP_ASYNC		0x0A
#define EVTYP_CTLPROGIDENT	0x0B
#define EVTYP_ERRNOTIFY		0x18
#define EVTYP_VT220MSG		0x1A
#define EVTYP_SDIAS		0x1C
#define EVTYP_SIGQUIESCE	0x1D
#define EVTYP_OCF		0x1E

#define EVTYP_OPCMD_MASK	SCLP_EVTYP_MASK(EVTYP_OPCMD)
#define EVTYP_MSG_MASK		SCLP_EVTYP_MASK(EVTYP_MSG)
#define EVTYP_CONFMGMDATA_MASK	SCLP_EVTYP_MASK(EVTYP_CONFMGMDATA)
#define EVTYP_DIAG_TEST_MASK	SCLP_EVTYP_MASK(EVTYP_DIAG_TEST)
#define EVTYP_STATECHANGE_MASK	SCLP_EVTYP_MASK(EVTYP_STATECHANGE)
#define EVTYP_PMSGCMD_MASK	SCLP_EVTYP_MASK(EVTYP_PMSGCMD)
#define EVTYP_ASYNC_MASK	SCLP_EVTYP_MASK(EVTYP_ASYNC)
#define EVTYP_CTLPROGIDENT_MASK	SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT)
#define EVTYP_ERRNOTIFY_MASK	SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY)
#define EVTYP_VT220MSG_MASK	SCLP_EVTYP_MASK(EVTYP_VT220MSG)
#define EVTYP_SDIAS_MASK	SCLP_EVTYP_MASK(EVTYP_SDIAS)
#define EVTYP_SIGQUIESCE_MASK	SCLP_EVTYP_MASK(EVTYP_SIGQUIESCE)
#define EVTYP_OCF_MASK		SCLP_EVTYP_MASK(EVTYP_OCF)

#define GNRLMSGFLGS_DOM		0x8000
#define GNRLMSGFLGS_SNDALRM	0x4000
#define GNRLMSGFLGS_HOLDMSG	0x2000

#define LNTPFLGS_CNTLTEXT	0x8000
#define LNTPFLGS_LABELTEXT	0x4000
#define LNTPFLGS_DATATEXT	0x2000
#define LNTPFLGS_ENDTEXT	0x1000
#define LNTPFLGS_PROMPTTEXT	0x0800

typedef unsigned int sclp_cmdw_t;

#define SCLP_CMDW_READ_CPU_INFO		0x00010001
#define SCLP_CMDW_READ_EVENT_DATA	0x00770005
#define SCLP_CMDW_WRITE_EVENT_DATA	0x00760005
#define SCLP_CMDW_WRITE_EVENT_MASK	0x00780005

#define GDS_ID_MDSMU		0x1310
#define GDS_ID_MDSROUTEINFO	0x1311
#define GDS_ID_AGUNWRKCORR	0x1549
#define GDS_ID_SNACONDREPORT	0x1532
#define GDS_ID_CPMSU		0x1212
#define GDS_ID_ROUTTARGINSTR	0x154D
#define GDS_ID_OPREQ		0x8070
#define GDS_ID_TEXTCMD		0x1320

#define GDS_KEY_SELFDEFTEXTMSG	0x31

enum sclp_pm_event {
	SCLP_PM_EVENT_FREEZE,
	SCLP_PM_EVENT_THAW,
	SCLP_PM_EVENT_RESTORE,
};

#define SCLP_PANIC_PRIO		1
#define SCLP_PANIC_PRIO_CLIENT	0

typedef u32 sccb_mask_t;	/* ATTENTION: assumes 32bit mask !!! */

struct sccb_header {
	u16	length;
	u8	function_code;
	u8	control_mask[3];
	u16	response_code;
} __attribute__((packed));

struct init_sccb {
	struct sccb_header header;
	u16 _reserved;
	u16 mask_length;
	sccb_mask_t receive_mask;
	sccb_mask_t send_mask;
	sccb_mask_t sclp_receive_mask;
	sccb_mask_t sclp_send_mask;
} __attribute__((packed));

struct read_cpu_info_sccb {
	struct	sccb_header header;
	u16	nr_configured;
	u16	offset_configured;
	u16	nr_standby;
	u16	offset_standby;
	u8	reserved[4096 - 16];
} __attribute__((packed, aligned(PAGE_SIZE)));

static inline void sclp_fill_core_info(struct sclp_core_info *info,
				       struct read_cpu_info_sccb *sccb)
{
	char *page = (char *) sccb;

	memset(info, 0, sizeof(*info));
	info->configured = sccb->nr_configured;
	info->standby = sccb->nr_standby;
	info->combined = sccb->nr_configured + sccb->nr_standby;
	memcpy(&info->core, page + sccb->offset_configured,
	       info->combined * sizeof(struct sclp_core_entry));
}

#define SCLP_HAS_CHP_INFO	(sclp.facilities & 0x8000000000000000ULL)
#define SCLP_HAS_CHP_RECONFIG	(sclp.facilities & 0x2000000000000000ULL)
#define SCLP_HAS_CPU_INFO	(sclp.facilities & 0x0800000000000000ULL)
#define SCLP_HAS_CPU_RECONFIG	(sclp.facilities & 0x0400000000000000ULL)
#define SCLP_HAS_PCI_RECONFIG	(sclp.facilities & 0x0000000040000000ULL)


struct gds_subvector {
	u8	length;
	u8	key;
} __attribute__((packed));

struct gds_vector {
	u16	length;
	u16	gds_id;
} __attribute__((packed));

struct evbuf_header {
	u16	length;
	u8	type;
	u8	flags;
	u16	_reserved;
} __attribute__((packed));

struct sclp_req {
	struct list_head list;		/* list_head for request queueing. */
	sclp_cmdw_t command;		/* sclp command to execute */
	void	*sccb;			/* pointer to the sccb to execute */
	char	status;			/* status of this request */
	int     start_count;		/* number of SVCs done for this req */
	/* Callback that is called after reaching final status. */
	void (*callback)(struct sclp_req *, void *data);
	void *callback_data;
	int queue_timeout;		/* request queue timeout (sec), set by
					   caller of sclp_add_request(), if
					   needed */
	/* Internal fields */
	unsigned long queue_expires;	/* request queue timeout (jiffies) */
};

#define SCLP_REQ_FILLED	  0x00	/* request is ready to be processed */
#define SCLP_REQ_QUEUED	  0x01	/* request is queued to be processed */
#define SCLP_REQ_RUNNING  0x02	/* request is currently running */
#define SCLP_REQ_DONE	  0x03	/* request is completed successfully */
#define SCLP_REQ_FAILED	  0x05	/* request is finally failed */
#define SCLP_REQ_QUEUED_TIMEOUT 0x06	/* request on queue timed out */

#define SCLP_QUEUE_INTERVAL 5	/* timeout interval for request queue */

/* function pointers that a high level driver has to use for registration */
/* of some routines it wants to be called from the low level driver */
struct sclp_register {
	struct list_head list;
	/* User wants to receive: */
	sccb_mask_t receive_mask;
	/* User wants to send: */
	sccb_mask_t send_mask;
	/* H/W can receive: */
	sccb_mask_t sclp_receive_mask;
	/* H/W can send: */
	sccb_mask_t sclp_send_mask;
	/* called if event type availability changes */
	void (*state_change_fn)(struct sclp_register *);
	/* called for events in cp_receive_mask/sclp_receive_mask */
	void (*receiver_fn)(struct evbuf_header *);
	/* called for power management events */
	void (*pm_event_fn)(struct sclp_register *, enum sclp_pm_event);
	/* pm event posted flag */
	int pm_event_posted;
};

/* externals from sclp.c */
int sclp_add_request(struct sclp_req *req);
void sclp_sync_wait(void);
int sclp_register(struct sclp_register *reg);
void sclp_unregister(struct sclp_register *reg);
int sclp_remove_processed(struct sccb_header *sccb);
int sclp_deactivate(void);
int sclp_reactivate(void);
int sclp_sync_request(sclp_cmdw_t command, void *sccb);
int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);

int sclp_sdias_init(void);
void sclp_sdias_exit(void);

enum {
	sclp_init_state_uninitialized,
	sclp_init_state_initializing,
	sclp_init_state_initialized
};

extern int sclp_init_state;
extern int sclp_console_pages;
extern int sclp_console_drop;
extern unsigned long sclp_console_full;

extern char sclp_early_sccb[PAGE_SIZE];

void sclp_early_wait_irq(void);
int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
int sclp_early_set_event_mask(struct init_sccb *sccb,
			      unsigned long receive_mask,
			      unsigned long send_mask);

/* useful inlines */

/* Perform service call. Return 0 on success, non-zero otherwise. */
static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
{
	int cc = 4; /* Initialize for program check handling */

	asm volatile(
		"0:	.insn	rre,0xb2200000,%1,%2\n"	 /* servc %1,%2 */
		"1:	ipm	%0\n"
		"	srl	%0,28\n"
		"2:\n"
		EX_TABLE(0b, 2b)
		EX_TABLE(1b, 2b)
		: "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
		: "cc", "memory");
	if (cc == 4)
		return -EINVAL;
	if (cc == 3)
		return -EIO;
	if (cc == 2)
		return -EBUSY;
	return 0;
}

/* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
/* translate single character from ASCII to EBCDIC */
static inline unsigned char
sclp_ascebc(unsigned char ch)
{
	return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
}

/* translate string from EBCDIC to ASCII */
static inline void
sclp_ebcasc_str(unsigned char *str, int nr)
{
	(MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
}

/* translate string from ASCII to EBCDIC */
static inline void
sclp_ascebc_str(unsigned char *str, int nr)
{
	(MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
}

static inline struct gds_vector *
sclp_find_gds_vector(void *start, void *end, u16 id)
{
	struct gds_vector *v;

	for (v = start; (void *) v < end; v = (void *) v + v->length)
		if (v->gds_id == id)
			return v;
	return NULL;
}

static inline struct gds_subvector *
sclp_find_gds_subvector(void *start, void *end, u8 key)
{
	struct gds_subvector *sv;

	for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length)
		if (sv->key == key)
			return sv;
	return NULL;
}

#endif	 /* __SCLP_H__ */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4	2	/*
7441b062	3	* Copyright IBM Corp. 1999,2012
1da177e4	4	*
62b74942 MH	5	* Author(s): Martin Peschke <mpeschke@de.ibm.com>
62b74942 MH	6	* Martin Schwidefsky <schwidefsky@de.ibm.com>
1da177e4 LT	7	*/
	8
	9	#ifndef __SCLP_H__
	10	#define __SCLP_H__
	11
	12	#include <linux/types.h>
	13	#include <linux/list.h>
ab14de6c	14	#include <asm/sclp.h>
1da177e4 LT	15	#include <asm/ebcdic.h>
	16
	17	/* maximum number of pages concerning our own memory management */
	18	#define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
25b41a7b	19	#define SCLP_CONSOLE_PAGES 6
1da177e4	20
3fa7ee88 SO	21	#define SCLP_EVTYP_MASK(T) (1U << (32 - (T)))
3fa7ee88 SO	22
6d4740c8 SH	23	#define EVTYP_OPCMD 0x01
6d4740c8 SH	24	#define EVTYP_MSG 0x02
3fa7ee88	25	#define EVTYP_CONFMGMDATA 0x04
8f933b10	26	#define EVTYP_DIAG_TEST 0x07
6d4740c8 SH	27	#define EVTYP_STATECHANGE 0x08
6d4740c8 SH	28	#define EVTYP_PMSGCMD 0x09
3fa7ee88 SO	29	#define EVTYP_ASYNC 0x0A
3fa7ee88 SO	30	#define EVTYP_CTLPROGIDENT 0x0B
12283a40	31	#define EVTYP_ERRNOTIFY 0x18
6d4740c8 SH	32	#define EVTYP_VT220MSG 0x1A
6d4740c8 SH	33	#define EVTYP_SDIAS 0x1C
3fa7ee88	34	#define EVTYP_SIGQUIESCE 0x1D
7eb9d5be	35	#define EVTYP_OCF 0x1E
6d4740c8	36
3fa7ee88 SO	37	#define EVTYP_OPCMD_MASK SCLP_EVTYP_MASK(EVTYP_OPCMD)
	38	#define EVTYP_MSG_MASK SCLP_EVTYP_MASK(EVTYP_MSG)
	39	#define EVTYP_CONFMGMDATA_MASK SCLP_EVTYP_MASK(EVTYP_CONFMGMDATA)
	40	#define EVTYP_DIAG_TEST_MASK SCLP_EVTYP_MASK(EVTYP_DIAG_TEST)
	41	#define EVTYP_STATECHANGE_MASK SCLP_EVTYP_MASK(EVTYP_STATECHANGE)
	42	#define EVTYP_PMSGCMD_MASK SCLP_EVTYP_MASK(EVTYP_PMSGCMD)
	43	#define EVTYP_ASYNC_MASK SCLP_EVTYP_MASK(EVTYP_ASYNC)
	44	#define EVTYP_CTLPROGIDENT_MASK SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT)
	45	#define EVTYP_ERRNOTIFY_MASK SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY)
	46	#define EVTYP_VT220MSG_MASK SCLP_EVTYP_MASK(EVTYP_VT220MSG)
	47	#define EVTYP_SDIAS_MASK SCLP_EVTYP_MASK(EVTYP_SDIAS)
	48	#define EVTYP_SIGQUIESCE_MASK SCLP_EVTYP_MASK(EVTYP_SIGQUIESCE)
	49	#define EVTYP_OCF_MASK SCLP_EVTYP_MASK(EVTYP_OCF)
6d4740c8 SH	50
	51	#define GNRLMSGFLGS_DOM 0x8000
	52	#define GNRLMSGFLGS_SNDALRM 0x4000
	53	#define GNRLMSGFLGS_HOLDMSG 0x2000
	54
	55	#define LNTPFLGS_CNTLTEXT 0x8000
	56	#define LNTPFLGS_LABELTEXT 0x4000
	57	#define LNTPFLGS_DATATEXT 0x2000
	58	#define LNTPFLGS_ENDTEXT 0x1000
	59	#define LNTPFLGS_PROMPTTEXT 0x0800
1da177e4 LT	60
	61	typedef unsigned int sclp_cmdw_t;
	62
af51160e	63	#define SCLP_CMDW_READ_CPU_INFO 0x00010001
ab14de6c HC	64	#define SCLP_CMDW_READ_EVENT_DATA 0x00770005
	65	#define SCLP_CMDW_WRITE_EVENT_DATA 0x00760005
	66	#define SCLP_CMDW_WRITE_EVENT_MASK 0x00780005
1da177e4 LT	67
1da177e4 LT	68	#define GDS_ID_MDSMU 0x1310
6d4740c8 SH	69	#define GDS_ID_MDSROUTEINFO 0x1311
	70	#define GDS_ID_AGUNWRKCORR 0x1549
	71	#define GDS_ID_SNACONDREPORT 0x1532
1da177e4	72	#define GDS_ID_CPMSU 0x1212
6d4740c8 SH	73	#define GDS_ID_ROUTTARGINSTR 0x154D
	74	#define GDS_ID_OPREQ 0x8070
	75	#define GDS_ID_TEXTCMD 0x1320
1da177e4	76
6d4740c8	77	#define GDS_KEY_SELFDEFTEXTMSG 0x31
1da177e4	78
62b74942 MH	79	enum sclp_pm_event {
	80	SCLP_PM_EVENT_FREEZE,
	81	SCLP_PM_EVENT_THAW,
	82	SCLP_PM_EVENT_RESTORE,
	83	};
	84
	85	#define SCLP_PANIC_PRIO 1
	86	#define SCLP_PANIC_PRIO_CLIENT 0
	87
1da177e4 LT	88	typedef u32 sccb_mask_t; /* ATTENTION: assumes 32bit mask !!! */
1da177e4 LT	89
05dd2530 HC	90	struct sccb_header {
	91	u16 length;
	92	u8 function_code;
	93	u8 control_mask[3];
	94	u16 response_code;
	95	} __attribute__((packed));
	96
cd183459 HG	97	struct init_sccb {
	98	struct sccb_header header;
	99	u16 _reserved;
	100	u16 mask_length;
	101	sccb_mask_t receive_mask;
	102	sccb_mask_t send_mask;
	103	sccb_mask_t sclp_receive_mask;
	104	sccb_mask_t sclp_send_mask;
	105	} __attribute__((packed));
	106
af51160e HC	107	struct read_cpu_info_sccb {
	108	struct sccb_header header;
	109	u16 nr_configured;
	110	u16 offset_configured;
	111	u16 nr_standby;
	112	u16 offset_standby;
	113	u8 reserved[4096 - 16];
	114	} __attribute__((packed, aligned(PAGE_SIZE)));
	115
	116	static inline void sclp_fill_core_info(struct sclp_core_info *info,
	117	struct read_cpu_info_sccb *sccb)
	118	{
	119	char page = (char ) sccb;
	120
	121	memset(info, 0, sizeof(*info));
	122	info->configured = sccb->nr_configured;
	123	info->standby = sccb->nr_standby;
	124	info->combined = sccb->nr_configured + sccb->nr_standby;
	125	memcpy(&info->core, page + sccb->offset_configured,
	126	info->combined * sizeof(struct sclp_core_entry));
	127	}
	128
78335a30 DH	129	#define SCLP_HAS_CHP_INFO (sclp.facilities & 0x8000000000000000ULL)
	130	#define SCLP_HAS_CHP_RECONFIG (sclp.facilities & 0x2000000000000000ULL)
	131	#define SCLP_HAS_CPU_INFO (sclp.facilities & 0x0800000000000000ULL)
	132	#define SCLP_HAS_CPU_RECONFIG (sclp.facilities & 0x0400000000000000ULL)
	133	#define SCLP_HAS_PCI_RECONFIG (sclp.facilities & 0x0000000040000000ULL)
83119ad4	134
c114728a	135
1da177e4 LT	136	struct gds_subvector {
	137	u8 length;
	138	u8 key;
	139	} __attribute__((packed));
	140
	141	struct gds_vector {
	142	u16 length;
	143	u16 gds_id;
	144	} __attribute__((packed));
	145
	146	struct evbuf_header {
	147	u16 length;
	148	u8 type;
	149	u8 flags;
	150	u16 _reserved;
	151	} __attribute__((packed));
	152
	153	struct sclp_req {
	154	struct list_head list; /* list_head for request queueing. */
	155	sclp_cmdw_t command; /* sclp command to execute */
	156	void sccb; / pointer to the sccb to execute */
	157	char status; /* status of this request */
	158	int start_count; /* number of SVCs done for this req */
	159	/* Callback that is called after reaching final status. */
	160	void (callback)(struct sclp_req , void *data);
	161	void *callback_data;
9f0128f9 GS	162	int queue_timeout; /* request queue timeout (sec), set by
	163	caller of sclp_add_request(), if
	164	needed */
	165	/* Internal fields */
	166	unsigned long queue_expires; /* request queue timeout (jiffies) */
1da177e4 LT	167	};
	168
	169	#define SCLP_REQ_FILLED 0x00 /* request is ready to be processed */
	170	#define SCLP_REQ_QUEUED 0x01 /* request is queued to be processed */
	171	#define SCLP_REQ_RUNNING 0x02 /* request is currently running */
	172	#define SCLP_REQ_DONE 0x03 /* request is completed successfully */
	173	#define SCLP_REQ_FAILED 0x05 /* request is finally failed */
9f0128f9 GS	174	#define SCLP_REQ_QUEUED_TIMEOUT 0x06 /* request on queue timed out */
	175
	176	#define SCLP_QUEUE_INTERVAL 5 /* timeout interval for request queue */
1da177e4 LT	177
	178	/* function pointers that a high level driver has to use for registration */
	179	/* of some routines it wants to be called from the low level driver */
	180	struct sclp_register {
	181	struct list_head list;
d082d3ce	182	/* User wants to receive: */
1da177e4	183	sccb_mask_t receive_mask;
d082d3ce	184	/* User wants to send: */
1da177e4	185	sccb_mask_t send_mask;
d082d3ce	186	/* H/W can receive: */
1da177e4	187	sccb_mask_t sclp_receive_mask;
d082d3ce	188	/* H/W can send: */
1da177e4 LT	189	sccb_mask_t sclp_send_mask;
	190	/* called if event type availability changes */
	191	void (state_change_fn)(struct sclp_register );
	192	/* called for events in cp_receive_mask/sclp_receive_mask */
	193	void (receiver_fn)(struct evbuf_header );
62b74942 MH	194	/* called for power management events */
	195	void (pm_event_fn)(struct sclp_register , enum sclp_pm_event);
	196	/* pm event posted flag */
	197	int pm_event_posted;
1da177e4 LT	198	};
	199
	200	/* externals from sclp.c */
	201	int sclp_add_request(struct sclp_req *req);
	202	void sclp_sync_wait(void);
	203	int sclp_register(struct sclp_register *reg);
	204	void sclp_unregister(struct sclp_register *reg);
	205	int sclp_remove_processed(struct sccb_header *sccb);
	206	int sclp_deactivate(void);
	207	int sclp_reactivate(void);
d475f942	208	int sclp_sync_request(sclp_cmdw_t command, void *sccb);
9f0128f9	209	int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);
1da177e4	210
763968e2 HC	211	int sclp_sdias_init(void);
	212	void sclp_sdias_exit(void);
	213
76fdf141 HC	214	enum {
	215	sclp_init_state_uninitialized,
	216	sclp_init_state_initializing,
	217	sclp_init_state_initialized
	218	};
	219
	220	extern int sclp_init_state;
25b41a7b MS	221	extern int sclp_console_pages;
	222	extern int sclp_console_drop;
	223	extern unsigned long sclp_console_full;
	224
d5ab7a34 HC	225	extern char sclp_early_sccb[PAGE_SIZE];
	226
	227	void sclp_early_wait_irq(void);
d5ab7a34 HC	228	int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
	229	unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
	230	int sclp_early_set_event_mask(struct init_sccb *sccb,
	231	unsigned long receive_mask,
	232	unsigned long send_mask);
	233
1da177e4 LT	234	/* useful inlines */
1da177e4 LT	235
d5ab7a34 HC	236	/* Perform service call. Return 0 on success, non-zero otherwise. */
	237	static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
	238	{
	239	int cc = 4; /* Initialize for program check handling */
	240
	241	asm volatile(
	242	"0: .insn rre,0xb2200000,%1,%2\n" /* servc %1,%2 */
	243	"1: ipm %0\n"
	244	" srl %0,28\n"
	245	"2:\n"
	246	EX_TABLE(0b, 2b)
	247	EX_TABLE(1b, 2b)
	248	: "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
	249	: "cc", "memory");
	250	if (cc == 4)
	251	return -EINVAL;
	252	if (cc == 3)
	253	return -EIO;
	254	if (cc == 2)
	255	return -EBUSY;
	256	return 0;
	257	}
	258
1da177e4 LT	259	/* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
	260	/* translate single character from ASCII to EBCDIC */
	261	static inline unsigned char
	262	sclp_ascebc(unsigned char ch)
	263	{
	264	return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
	265	}
	266
	267	/* translate string from EBCDIC to ASCII */
	268	static inline void
	269	sclp_ebcasc_str(unsigned char *str, int nr)
	270	{
	271	(MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
	272	}
	273
	274	/* translate string from ASCII to EBCDIC */
	275	static inline void
	276	sclp_ascebc_str(unsigned char *str, int nr)
	277	{
	278	(MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
	279	}
	280
30c2df51 MS	281	static inline struct gds_vector *
	282	sclp_find_gds_vector(void start, void end, u16 id)
	283	{
	284	struct gds_vector *v;
	285
	286	for (v = start; (void ) v < end; v = (void ) v + v->length)
	287	if (v->gds_id == id)
	288	return v;
	289	return NULL;
	290	}
	291
	292	static inline struct gds_subvector *
	293	sclp_find_gds_subvector(void start, void end, u8 key)
	294	{
	295	struct gds_subvector *sv;
	296
	297	for (sv = start; (void ) sv < end; sv = (void ) sv + sv->length)
	298	if (sv->key == key)
	299	return sv;
	300	return NULL;
	301	}
	302
1da177e4	303	#endif /* __SCLP_H__ */