[net-next-2.6.git] / drivers / s390 / sysinfo.c

/*
 *  drivers/s390/sysinfo.c
 *
 *    Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
 *    Author(s): Ulrich Weigand (Ulrich.Weigand@de.ibm.com)
 */

#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <asm/ebcdic.h>

/* Sigh, math-emu. Don't ask. */
#include <asm/sfp-util.h>
#include <math-emu/soft-fp.h>
#include <math-emu/single.h>

struct sysinfo_1_1_1 {
	char reserved_0[32];
	char manufacturer[16];
	char type[4];
	char reserved_1[12];
	char model_capacity[16];
	char sequence[16];
	char plant[4];
	char model[16];
};

struct sysinfo_1_2_1 {
	char reserved_0[80];
	char sequence[16];
	char plant[4];
	char reserved_1[2];
	unsigned short cpu_address;
};

struct sysinfo_1_2_2 {
	char format;
	char reserved_0[1];
	unsigned short acc_offset;
	char reserved_1[24];
	unsigned int secondary_capability;
	unsigned int capability;
	unsigned short cpus_total;
	unsigned short cpus_configured;
	unsigned short cpus_standby;
	unsigned short cpus_reserved;
	unsigned short adjustment[0];
};

struct sysinfo_1_2_2_extension {
	unsigned int alt_capability;
	unsigned short alt_adjustment[0];
};

struct sysinfo_2_2_1 {
	char reserved_0[80];
	char sequence[16];
	char plant[4];
	unsigned short cpu_id;
	unsigned short cpu_address;
};

struct sysinfo_2_2_2 {
	char reserved_0[32];
	unsigned short lpar_number;
	char reserved_1;
	unsigned char characteristics;
	unsigned short cpus_total;
	unsigned short cpus_configured;
	unsigned short cpus_standby;
	unsigned short cpus_reserved;
	char name[8];
	unsigned int caf;
	char reserved_2[16];
	unsigned short cpus_dedicated;
	unsigned short cpus_shared;
};

#define LPAR_CHAR_DEDICATED	(1 << 7)
#define LPAR_CHAR_SHARED	(1 << 6)
#define LPAR_CHAR_LIMITED	(1 << 5)

struct sysinfo_3_2_2 {
	char reserved_0[31];
	unsigned char count;
	struct {
		char reserved_0[4];
		unsigned short cpus_total;
		unsigned short cpus_configured;
		unsigned short cpus_standby;
		unsigned short cpus_reserved;
		char name[8];
		unsigned int caf;
		char cpi[16];
		char reserved_1[24];

	} vm[8];
};

static inline int stsi(void *sysinfo, int fc, int sel1, int sel2)
{
	register int r0 asm("0") = (fc << 28) | sel1;
	register int r1 asm("1") = sel2;

	asm volatile(
		"   stsi 0(%2)\n"
		"0: jz   2f\n"
		"1: lhi  %0,%3\n"
		"2:\n"
		EX_TABLE(0b,1b)
		: "+d" (r0) : "d" (r1), "a" (sysinfo), "K" (-ENOSYS)
		: "cc", "memory" );
	return r0;
}

static inline int stsi_0(void)
{
	int rc = stsi (NULL, 0, 0, 0);
	return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
}

static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
{
	if (stsi(info, 1, 1, 1) == -ENOSYS)
		return len;

	EBCASC(info->manufacturer, sizeof(info->manufacturer));
	EBCASC(info->type, sizeof(info->type));
	EBCASC(info->model, sizeof(info->model));
	EBCASC(info->sequence, sizeof(info->sequence));
	EBCASC(info->plant, sizeof(info->plant));
	EBCASC(info->model_capacity, sizeof(info->model_capacity));
	len += sprintf(page + len, "Manufacturer:         %-16.16s\n",
		       info->manufacturer);
	len += sprintf(page + len, "Type:                 %-4.4s\n",
		       info->type);
	if (info->model[0] != '\0')
		/*
		 * Sigh: the model field has been renamed with System z9
		 * to model_capacity and a new model field has been added
		 * after the plant field. To avoid confusing older programs
		 * the "Model:" prints "model_capacity model" or just
		 * "model_capacity" if the model string is empty .
		 */
		len += sprintf(page + len,
			       "Model:                %-16.16s %-16.16s\n",
			       info->model_capacity, info->model);
	else
		len += sprintf(page + len, "Model:                %-16.16s\n",
			       info->model_capacity);
	len += sprintf(page + len, "Sequence Code:        %-16.16s\n",
		       info->sequence);
	len += sprintf(page + len, "Plant:                %-4.4s\n",
		       info->plant);
	len += sprintf(page + len, "Model Capacity:       %-16.16s\n",
		       info->model_capacity);
	return len;
}

#if 0 /* Currently unused */
static int stsi_1_2_1(struct sysinfo_1_2_1 *info, char *page, int len)
{
	if (stsi(info, 1, 2, 1) == -ENOSYS)
		return len;

	len += sprintf(page + len, "\n");
	EBCASC(info->sequence, sizeof(info->sequence));
	EBCASC(info->plant, sizeof(info->plant));
	len += sprintf(page + len, "Sequence Code of CPU: %-16.16s\n",
		       info->sequence);
	len += sprintf(page + len, "Plant of CPU:         %-16.16s\n",
		       info->plant);
	return len;
}
#endif

static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
{
	struct sysinfo_1_2_2_extension *ext;
	int i;

	if (stsi(info, 1, 2, 2) == -ENOSYS)
		return len;
	ext = (struct sysinfo_1_2_2_extension *)
		((unsigned long) info + info->acc_offset);

	len += sprintf(page + len, "\n");
	len += sprintf(page + len, "CPUs Total:           %d\n",
		       info->cpus_total);
	len += sprintf(page + len, "CPUs Configured:      %d\n",
		       info->cpus_configured);
	len += sprintf(page + len, "CPUs Standby:         %d\n",
		       info->cpus_standby);
	len += sprintf(page + len, "CPUs Reserved:        %d\n",
		       info->cpus_reserved);

	if (info->format == 1) {
		/*
		 * Sigh 2. According to the specification the alternate
		 * capability field is a 32 bit floating point number
		 * if the higher order 8 bits are not zero. Printing
		 * a floating point number in the kernel is a no-no,
		 * always print the number as 32 bit unsigned integer.
		 * The user-space needs to know about the strange
		 * encoding of the alternate cpu capability.
		 */
		len += sprintf(page + len, "Capability:           %u %u\n",
			       info->capability, ext->alt_capability);
		for (i = 2; i <= info->cpus_total; i++)
			len += sprintf(page + len,
				       "Adjustment %02d-way:    %u %u\n",
				       i, info->adjustment[i-2],
				       ext->alt_adjustment[i-2]);

	} else {
		len += sprintf(page + len, "Capability:           %u\n",
			       info->capability);
		for (i = 2; i <= info->cpus_total; i++)
			len += sprintf(page + len,
				       "Adjustment %02d-way:    %u\n",
				       i, info->adjustment[i-2]);
	}

	if (info->secondary_capability != 0)
		len += sprintf(page + len, "Secondary Capability: %d\n",
			       info->secondary_capability);

	return len;
}

#if 0 /* Currently unused */
static int stsi_2_2_1(struct sysinfo_2_2_1 *info, char *page, int len)
{
	if (stsi(info, 2, 2, 1) == -ENOSYS)
		return len;

	len += sprintf(page + len, "\n");
	EBCASC (info->sequence, sizeof(info->sequence));
	EBCASC (info->plant, sizeof(info->plant));
	len += sprintf(page + len, "Sequence Code of logical CPU: %-16.16s\n",
		       info->sequence);
	len += sprintf(page + len, "Plant of logical CPU: %-16.16s\n",
		       info->plant);
	return len;
}
#endif

static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
{
	if (stsi(info, 2, 2, 2) == -ENOSYS)
		return len;

	EBCASC (info->name, sizeof(info->name));

	len += sprintf(page + len, "\n");
	len += sprintf(page + len, "LPAR Number:          %d\n",
		       info->lpar_number);

	len += sprintf(page + len, "LPAR Characteristics: ");
	if (info->characteristics & LPAR_CHAR_DEDICATED)
		len += sprintf(page + len, "Dedicated ");
	if (info->characteristics & LPAR_CHAR_SHARED)
		len += sprintf(page + len, "Shared ");
	if (info->characteristics & LPAR_CHAR_LIMITED)
		len += sprintf(page + len, "Limited ");
	len += sprintf(page + len, "\n");

	len += sprintf(page + len, "LPAR Name:            %-8.8s\n",
		       info->name);

	len += sprintf(page + len, "LPAR Adjustment:      %d\n",
		       info->caf);

	len += sprintf(page + len, "LPAR CPUs Total:      %d\n",
		       info->cpus_total);
	len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
		       info->cpus_configured);
	len += sprintf(page + len, "LPAR CPUs Standby:    %d\n",
		       info->cpus_standby);
	len += sprintf(page + len, "LPAR CPUs Reserved:   %d\n",
		       info->cpus_reserved);
	len += sprintf(page + len, "LPAR CPUs Dedicated:  %d\n",
		       info->cpus_dedicated);
	len += sprintf(page + len, "LPAR CPUs Shared:     %d\n",
		       info->cpus_shared);
	return len;
}

static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
{
	int i;

	if (stsi(info, 3, 2, 2) == -ENOSYS)
		return len;
	for (i = 0; i < info->count; i++) {
		EBCASC (info->vm[i].name, sizeof(info->vm[i].name));
		EBCASC (info->vm[i].cpi, sizeof(info->vm[i].cpi));
		len += sprintf(page + len, "\n");
		len += sprintf(page + len, "VM%02d Name:            %-8.8s\n",
			       i, info->vm[i].name);
		len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
			       i, info->vm[i].cpi);

		len += sprintf(page + len, "VM%02d Adjustment:      %d\n",
			       i, info->vm[i].caf);

		len += sprintf(page + len, "VM%02d CPUs Total:      %d\n",
			       i, info->vm[i].cpus_total);
		len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
			       i, info->vm[i].cpus_configured);
		len += sprintf(page + len, "VM%02d CPUs Standby:    %d\n",
			       i, info->vm[i].cpus_standby);
		len += sprintf(page + len, "VM%02d CPUs Reserved:   %d\n",
			       i, info->vm[i].cpus_reserved);
	}
	return len;
}


static int proc_read_sysinfo(char *page, char **start,
                             off_t off, int count,
                             int *eof, void *data)
{
	unsigned long info = get_zeroed_page (GFP_KERNEL);
	int level, len;
	
	if (!info)
		return 0;

	len = 0;
	level = stsi_0();
	if (level >= 1)
		len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);

	if (level >= 1)
		len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);

	if (level >= 2)
		len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);

	if (level >= 3)
		len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);

	free_page (info);
        return len;
}

static __init int create_proc_sysinfo(void)
{
	create_proc_read_entry("sysinfo", 0444, NULL,
			       proc_read_sysinfo, NULL);
	return 0;
}

__initcall(create_proc_sysinfo);

/*
 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
 */
void s390_adjust_jiffies(void)
{
	struct sysinfo_1_2_2 *info;
	const unsigned int fmil = 0x4b189680;	/* 1e7 as 32-bit float. */
	FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
	FP_DECL_EX;
	unsigned int capability;

	info = (void *) get_zeroed_page(GFP_KERNEL);
	if (!info)
		return;

	if (stsi(info, 1, 2, 2) != -ENOSYS) {
		/*
		 * Major sigh. The cpu capability encoding is "special".
		 * If the first 9 bits of info->capability are 0 then it
		 * is a 32 bit unsigned integer in the range 0 .. 2^23.
		 * If the first 9 bits are != 0 then it is a 32 bit float.
		 * In addition a lower value indicates a proportionally
		 * higher cpu capacity. Bogomips are the other way round.
		 * To get to a halfway suitable number we divide 1e7
		 * by the cpu capability number. Yes, that means a floating
		 * point division .. math-emu here we come :-)
		 */
		FP_UNPACK_SP(SA, &fmil);
		if ((info->capability >> 23) == 0)
			FP_FROM_INT_S(SB, info->capability, 32, int);
		else
			FP_UNPACK_SP(SB, &info->capability);
		FP_DIV_S(SR, SA, SB);
		FP_TO_INT_S(capability, SR, 32, 0);
	} else
		/*
		 * Really old machine without stsi block for basic
		 * cpu information. Report 42.0 bogomips.
		 */
		capability = 42;
	loops_per_jiffy = capability * (500000/HZ);
	free_page((unsigned long) info);
}

/*
 * calibrate the delay loop
 */
void __init calibrate_delay(void)
{
	s390_adjust_jiffies();
	/* Print the good old Bogomips line .. */
	printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
	       "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
	       (loops_per_jiffy/(5000/HZ)) % 100);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* drivers/s390/sysinfo.c
	3	*
	4	* Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
	5	* Author(s): Ulrich Weigand (Ulrich.Weigand@de.ibm.com)
	6	*/
	7
1da177e4 LT	8	#include <linux/kernel.h>
	9	#include <linux/mm.h>
	10	#include <linux/proc_fs.h>
	11	#include <linux/init.h>
31ee4b2f	12	#include <linux/delay.h>
1da177e4 LT	13	#include <asm/ebcdic.h>
1da177e4 LT	14
31ee4b2f MS	15	/* Sigh, math-emu. Don't ask. */
	16	#include <asm/sfp-util.h>
	17	#include <math-emu/soft-fp.h>
	18	#include <math-emu/single.h>
	19
0fee644a	20	struct sysinfo_1_1_1 {
1da177e4 LT	21	char reserved_0[32];
	22	char manufacturer[16];
	23	char type[4];
	24	char reserved_1[12];
0fee644a	25	char model_capacity[16];
1da177e4 LT	26	char sequence[16];
1da177e4 LT	27	char plant[4];
0fee644a	28	char model[16];
1da177e4 LT	29	};
1da177e4 LT	30
0fee644a	31	struct sysinfo_1_2_1 {
1da177e4 LT	32	char reserved_0[80];
	33	char sequence[16];
	34	char plant[4];
	35	char reserved_1[2];
	36	unsigned short cpu_address;
	37	};
	38
0fee644a MS	39	struct sysinfo_1_2_2 {
	40	char format;
	41	char reserved_0[1];
	42	unsigned short acc_offset;
	43	char reserved_1[24];
	44	unsigned int secondary_capability;
1da177e4 LT	45	unsigned int capability;
	46	unsigned short cpus_total;
	47	unsigned short cpus_configured;
	48	unsigned short cpus_standby;
	49	unsigned short cpus_reserved;
	50	unsigned short adjustment[0];
	51	};
	52
0fee644a MS	53	struct sysinfo_1_2_2_extension {
	54	unsigned int alt_capability;
	55	unsigned short alt_adjustment[0];
	56	};
	57
	58	struct sysinfo_2_2_1 {
1da177e4 LT	59	char reserved_0[80];
	60	char sequence[16];
	61	char plant[4];
	62	unsigned short cpu_id;
	63	unsigned short cpu_address;
	64	};
	65
0fee644a	66	struct sysinfo_2_2_2 {
1da177e4 LT	67	char reserved_0[32];
	68	unsigned short lpar_number;
	69	char reserved_1;
	70	unsigned char characteristics;
1da177e4 LT	71	unsigned short cpus_total;
	72	unsigned short cpus_configured;
	73	unsigned short cpus_standby;
	74	unsigned short cpus_reserved;
	75	char name[8];
	76	unsigned int caf;
	77	char reserved_2[16];
	78	unsigned short cpus_dedicated;
	79	unsigned short cpus_shared;
	80	};
	81
0fee644a MS	82	#define LPAR_CHAR_DEDICATED (1 << 7)
	83	#define LPAR_CHAR_SHARED (1 << 6)
	84	#define LPAR_CHAR_LIMITED (1 << 5)
	85
	86	struct sysinfo_3_2_2 {
1da177e4 LT	87	char reserved_0[31];
1da177e4 LT	88	unsigned char count;
0fee644a	89	struct {
1da177e4 LT	90	char reserved_0[4];
	91	unsigned short cpus_total;
	92	unsigned short cpus_configured;
	93	unsigned short cpus_standby;
	94	unsigned short cpus_reserved;
	95	char name[8];
	96	unsigned int caf;
	97	char cpi[16];
	98	char reserved_1[24];
	99
	100	} vm[8];
	101	};
	102
0fee644a	103	static inline int stsi(void *sysinfo, int fc, int sel1, int sel2)
1da177e4	104	{
0fee644a MS	105	register int r0 asm("0") = (fc << 28) \| sel1;
	106	register int r1 asm("1") = sel2;
	107
	108	asm volatile(
	109	" stsi 0(%2)\n"
	110	"0: jz 2f\n"
	111	"1: lhi %0,%3\n"
	112	"2:\n"
	113	EX_TABLE(0b,1b)
	114	: "+d" (r0) : "d" (r1), "a" (sysinfo), "K" (-ENOSYS)
	115	: "cc", "memory" );
	116	return r0;
1da177e4 LT	117	}
1da177e4 LT	118
0fee644a	119	static inline int stsi_0(void)
1da177e4 LT	120	{
1da177e4 LT	121	int rc = stsi (NULL, 0, 0, 0);
0fee644a	122	return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
1da177e4 LT	123	}
1da177e4 LT	124
0fee644a	125	static int stsi_1_1_1(struct sysinfo_1_1_1 info, char page, int len)
1da177e4	126	{
0fee644a MS	127	if (stsi(info, 1, 1, 1) == -ENOSYS)
	128	return len;
	129
	130	EBCASC(info->manufacturer, sizeof(info->manufacturer));
	131	EBCASC(info->type, sizeof(info->type));
	132	EBCASC(info->model, sizeof(info->model));
	133	EBCASC(info->sequence, sizeof(info->sequence));
	134	EBCASC(info->plant, sizeof(info->plant));
	135	EBCASC(info->model_capacity, sizeof(info->model_capacity));
	136	len += sprintf(page + len, "Manufacturer: %-16.16s\n",
	137	info->manufacturer);
	138	len += sprintf(page + len, "Type: %-4.4s\n",
	139	info->type);
	140	if (info->model[0] != '\0')
	141	/*
	142	* Sigh: the model field has been renamed with System z9
	143	* to model_capacity and a new model field has been added
	144	* after the plant field. To avoid confusing older programs
	145	* the "Model:" prints "model_capacity model" or just
	146	* "model_capacity" if the model string is empty .
	147	*/
	148	len += sprintf(page + len,
	149	"Model: %-16.16s %-16.16s\n",
	150	info->model_capacity, info->model);
	151	else
	152	len += sprintf(page + len, "Model: %-16.16s\n",
	153	info->model_capacity);
	154	len += sprintf(page + len, "Sequence Code: %-16.16s\n",
	155	info->sequence);
	156	len += sprintf(page + len, "Plant: %-4.4s\n",
	157	info->plant);
	158	len += sprintf(page + len, "Model Capacity: %-16.16s\n",
	159	info->model_capacity);
	160	return len;
1da177e4 LT	161	}
1da177e4 LT	162
0fee644a MS	163	#if 0 /* Currently unused */
0fee644a MS	164	static int stsi_1_2_1(struct sysinfo_1_2_1 info, char page, int len)
1da177e4	165	{
0fee644a MS	166	if (stsi(info, 1, 2, 1) == -ENOSYS)
	167	return len;
	168
	169	len += sprintf(page + len, "\n");
	170	EBCASC(info->sequence, sizeof(info->sequence));
	171	EBCASC(info->plant, sizeof(info->plant));
	172	len += sprintf(page + len, "Sequence Code of CPU: %-16.16s\n",
	173	info->sequence);
	174	len += sprintf(page + len, "Plant of CPU: %-16.16s\n",
	175	info->plant);
	176	return len;
1da177e4	177	}
0fee644a	178	#endif
1da177e4	179
0fee644a	180	static int stsi_1_2_2(struct sysinfo_1_2_2 info, char page, int len)
1da177e4	181	{
0fee644a MS	182	struct sysinfo_1_2_2_extension *ext;
	183	int i;
	184
	185	if (stsi(info, 1, 2, 2) == -ENOSYS)
	186	return len;
	187	ext = (struct sysinfo_1_2_2_extension *)
	188	((unsigned long) info + info->acc_offset);
	189
	190	len += sprintf(page + len, "\n");
	191	len += sprintf(page + len, "CPUs Total: %d\n",
	192	info->cpus_total);
	193	len += sprintf(page + len, "CPUs Configured: %d\n",
	194	info->cpus_configured);
	195	len += sprintf(page + len, "CPUs Standby: %d\n",
	196	info->cpus_standby);
	197	len += sprintf(page + len, "CPUs Reserved: %d\n",
	198	info->cpus_reserved);
	199
	200	if (info->format == 1) {
	201	/*
	202	* Sigh 2. According to the specification the alternate
	203	* capability field is a 32 bit floating point number
	204	* if the higher order 8 bits are not zero. Printing
	205	* a floating point number in the kernel is a no-no,
	206	* always print the number as 32 bit unsigned integer.
31ee4b2f	207	* The user-space needs to know about the strange
0fee644a MS	208	* encoding of the alternate cpu capability.
	209	*/
	210	len += sprintf(page + len, "Capability: %u %u\n",
	211	info->capability, ext->alt_capability);
	212	for (i = 2; i <= info->cpus_total; i++)
	213	len += sprintf(page + len,
	214	"Adjustment %02d-way: %u %u\n",
	215	i, info->adjustment[i-2],
	216	ext->alt_adjustment[i-2]);
	217
	218	} else {
	219	len += sprintf(page + len, "Capability: %u\n",
	220	info->capability);
	221	for (i = 2; i <= info->cpus_total; i++)
	222	len += sprintf(page + len,
	223	"Adjustment %02d-way: %u\n",
	224	i, info->adjustment[i-2]);
	225	}
	226
	227	if (info->secondary_capability != 0)
	228	len += sprintf(page + len, "Secondary Capability: %d\n",
	229	info->secondary_capability);
	230
	231	return len;
1da177e4 LT	232	}
1da177e4 LT	233
0fee644a MS	234	#if 0 /* Currently unused */
0fee644a MS	235	static int stsi_2_2_1(struct sysinfo_2_2_1 info, char page, int len)
1da177e4	236	{
0fee644a MS	237	if (stsi(info, 2, 2, 1) == -ENOSYS)
	238	return len;
	239
	240	len += sprintf(page + len, "\n");
	241	EBCASC (info->sequence, sizeof(info->sequence));
	242	EBCASC (info->plant, sizeof(info->plant));
	243	len += sprintf(page + len, "Sequence Code of logical CPU: %-16.16s\n",
	244	info->sequence);
	245	len += sprintf(page + len, "Plant of logical CPU: %-16.16s\n",
	246	info->plant);
	247	return len;
1da177e4	248	}
0fee644a	249	#endif
1da177e4	250
0fee644a	251	static int stsi_2_2_2(struct sysinfo_2_2_2 info, char page, int len)
1da177e4	252	{
0fee644a MS	253	if (stsi(info, 2, 2, 2) == -ENOSYS)
	254	return len;
	255
	256	EBCASC (info->name, sizeof(info->name));
	257
	258	len += sprintf(page + len, "\n");
	259	len += sprintf(page + len, "LPAR Number: %d\n",
	260	info->lpar_number);
	261
	262	len += sprintf(page + len, "LPAR Characteristics: ");
	263	if (info->characteristics & LPAR_CHAR_DEDICATED)
	264	len += sprintf(page + len, "Dedicated ");
	265	if (info->characteristics & LPAR_CHAR_SHARED)
	266	len += sprintf(page + len, "Shared ");
	267	if (info->characteristics & LPAR_CHAR_LIMITED)
	268	len += sprintf(page + len, "Limited ");
	269	len += sprintf(page + len, "\n");
	270
	271	len += sprintf(page + len, "LPAR Name: %-8.8s\n",
	272	info->name);
	273
	274	len += sprintf(page + len, "LPAR Adjustment: %d\n",
	275	info->caf);
	276
	277	len += sprintf(page + len, "LPAR CPUs Total: %d\n",
	278	info->cpus_total);
	279	len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
	280	info->cpus_configured);
	281	len += sprintf(page + len, "LPAR CPUs Standby: %d\n",
	282	info->cpus_standby);
	283	len += sprintf(page + len, "LPAR CPUs Reserved: %d\n",
	284	info->cpus_reserved);
	285	len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n",
	286	info->cpus_dedicated);
	287	len += sprintf(page + len, "LPAR CPUs Shared: %d\n",
	288	info->cpus_shared);
	289	return len;
1da177e4 LT	290	}
1da177e4 LT	291
0fee644a	292	static int stsi_3_2_2(struct sysinfo_3_2_2 info, char page, int len)
1da177e4	293	{
0fee644a MS	294	int i;
	295
	296	if (stsi(info, 3, 2, 2) == -ENOSYS)
	297	return len;
	298	for (i = 0; i < info->count; i++) {
	299	EBCASC (info->vm[i].name, sizeof(info->vm[i].name));
	300	EBCASC (info->vm[i].cpi, sizeof(info->vm[i].cpi));
	301	len += sprintf(page + len, "\n");
	302	len += sprintf(page + len, "VM%02d Name: %-8.8s\n",
	303	i, info->vm[i].name);
	304	len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
	305	i, info->vm[i].cpi);
	306
	307	len += sprintf(page + len, "VM%02d Adjustment: %d\n",
	308	i, info->vm[i].caf);
	309
	310	len += sprintf(page + len, "VM%02d CPUs Total: %d\n",
	311	i, info->vm[i].cpus_total);
	312	len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
	313	i, info->vm[i].cpus_configured);
	314	len += sprintf(page + len, "VM%02d CPUs Standby: %d\n",
	315	i, info->vm[i].cpus_standby);
	316	len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n",
	317	i, info->vm[i].cpus_reserved);
1da177e4	318	}
0fee644a	319	return len;
1da177e4 LT	320	}
	321
	322
	323	static int proc_read_sysinfo(char page, char *start,
	324	off_t off, int count,
	325	int eof, void data)
	326	{
0fee644a MS	327	unsigned long info = get_zeroed_page (GFP_KERNEL);
0fee644a MS	328	int level, len;
1da177e4 LT	329
	330	if (!info)
	331	return 0;
	332
0fee644a MS	333	len = 0;
	334	level = stsi_0();
	335	if (level >= 1)
	336	len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
1da177e4	337
0fee644a MS	338	if (level >= 1)
0fee644a MS	339	len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
1da177e4	340
0fee644a MS	341	if (level >= 2)
0fee644a MS	342	len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
1da177e4	343
0fee644a MS	344	if (level >= 3)
0fee644a MS	345	len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
1da177e4	346
0fee644a	347	free_page (info);
1da177e4 LT	348	return len;
	349	}
	350
	351	static __init int create_proc_sysinfo(void)
	352	{
0fee644a MS	353	create_proc_read_entry("sysinfo", 0444, NULL,
0fee644a MS	354	proc_read_sysinfo, NULL);
1da177e4 LT	355	return 0;
	356	}
	357
	358	__initcall(create_proc_sysinfo);
	359
31ee4b2f MS	360	/*
	361	* CPU capability might have changed. Therefore recalculate loops_per_jiffy.
	362	*/
	363	void s390_adjust_jiffies(void)
	364	{
	365	struct sysinfo_1_2_2 *info;
	366	const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
	367	FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
	368	FP_DECL_EX;
	369	unsigned int capability;
	370
	371	info = (void *) get_zeroed_page(GFP_KERNEL);
	372	if (!info)
	373	return;
	374
	375	if (stsi(info, 1, 2, 2) != -ENOSYS) {
	376	/*
	377	* Major sigh. The cpu capability encoding is "special".
	378	* If the first 9 bits of info->capability are 0 then it
	379	* is a 32 bit unsigned integer in the range 0 .. 2^23.
	380	* If the first 9 bits are != 0 then it is a 32 bit float.
	381	* In addition a lower value indicates a proportionally
	382	* higher cpu capacity. Bogomips are the other way round.
	383	* To get to a halfway suitable number we divide 1e7
	384	* by the cpu capability number. Yes, that means a floating
	385	* point division .. math-emu here we come :-)
	386	*/
	387	FP_UNPACK_SP(SA, &fmil);
	388	if ((info->capability >> 23) == 0)
	389	FP_FROM_INT_S(SB, info->capability, 32, int);
	390	else
	391	FP_UNPACK_SP(SB, &info->capability);
	392	FP_DIV_S(SR, SA, SB);
	393	FP_TO_INT_S(capability, SR, 32, 0);
	394	} else
	395	/*
	396	* Really old machine without stsi block for basic
	397	* cpu information. Report 42.0 bogomips.
	398	*/
	399	capability = 42;
	400	loops_per_jiffy = capability * (500000/HZ);
	401	free_page((unsigned long) info);
	402	}
	403
	404	/*
	405	* calibrate the delay loop
	406	*/
	407	void __init calibrate_delay(void)
	408	{
	409	s390_adjust_jiffies();
	410	/* Print the good old Bogomips line .. */
	411	printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
	412	"%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
	413	(loops_per_jiffy/(5000/HZ)) % 100);
	414	}