text: /*
   *  drivers/s390/sysinfo.c
   *
   *    Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
   *    Author(s): Ulrich Weigand (Ulrich.Weigand@de.ibm.com)
   */
  
  #include <linux/config.h>
  #include <linux/kernel.h>
  #include <linux/mm.h>
  #include <linux/proc_fs.h>
  #include <linux/init.h>
  #include <asm/ebcdic.h>
  
  struct sysinfo_1_1_1
  {
  	char reserved_0[32];
  	char manufacturer[16];
  	char type[4];
  	char reserved_1[12];
  	char model[16];
  	char sequence[16];
  	char plant[4];
  };
  
  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 reserved_0[32];
  	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_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;
  	#define LPAR_CHAR_DEDICATED	(1 << 7)
  	#define LPAR_CHAR_SHARED	(1 << 6)
  	#define LPAR_CHAR_LIMITED	(1 << 5)
  	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;
  };
  
  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];
  };
  
  union s390_sysinfo
  {
  	struct sysinfo_1_1_1 sysinfo_1_1_1;
  	struct sysinfo_1_2_1 sysinfo_1_2_1;
  	struct sysinfo_1_2_2 sysinfo_1_2_2;
  	struct sysinfo_2_2_1 sysinfo_2_2_1;
  	struct sysinfo_2_2_2 sysinfo_2_2_2;
  	struct sysinfo_3_2_2 sysinfo_3_2_2;
  };
  
  static inline int stsi (void *sysinfo, 
                          int fc, int sel1, int sel2)
  {
  	int cc, retv;
  
  #ifndef CONFIG_64BIT
  	__asm__ __volatile__ (	"lr\t0,%2\n"
  				"\tlr\t1,%3\n"
  				"\tstsi\t0(%4)\n"
  				"0:\tipm\t%0\n"
  				"\tsrl\t%0,28\n"
  				"1:lr\t%1,0\n"
  				".section .fixup,\"ax\"\n"
  				"2:\tlhi\t%0,3\n"
  				"\tbras\t1,3f\n"
  				"\t.long 1b\n"
  				"3:\tl\t1,0(1)\n"
  				"\tbr\t1\n"
  				".previous\n"
  				".section __ex_table,\"a\"\n"
  				"\t.align 4\n"
  				"\t.long 0b,2b\n"
  				".previous\n"
  				: "=d" (cc), "=d" (retv)
  				: "d" ((fc << 28) | sel1), "d" (sel2), "a" (sysinfo) 
  				: "cc", "memory", "0", "1" );
  #else
  	__asm__ __volatile__ (	"lr\t0,%2\n"
  				"lr\t1,%3\n"
  				"\tstsi\t0(%4)\n"
  				"0:\tipm\t%0\n"
  				"\tsrl\t%0,28\n"
  				"1:lr\t%1,0\n"
  				".section .fixup,\"ax\"\n"
  				"2:\tlhi\t%0,3\n"
  				"\tjg\t1b\n"
  				".previous\n"
  				".section __ex_table,\"a\"\n"
  				"\t.align 8\n"
  				"\t.quad 0b,2b\n"
  				".previous\n"
  				: "=d" (cc), "=d" (retv)
  				: "d" ((fc << 28) | sel1), "d" (sel2), "a" (sysinfo) 
  				: "cc", "memory", "0", "1" );
  #endif
  
  	return cc? -1 : retv;
  }
  
  static inline int stsi_0 (void)
  {
  	int rc = stsi (NULL, 0, 0, 0);
  	return rc == -1 ? rc : (((unsigned int)rc) >> 28);
  }
  
  static inline int stsi_1_1_1 (struct sysinfo_1_1_1 *info)
  {
  	int rc = stsi (info, 1, 1, 1);
  	if (rc != -1)
  	{
  		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));
  	}
  	return rc == -1 ? rc : 0;
  }
  
  static inline int stsi_1_2_1 (struct sysinfo_1_2_1 *info)
  {
  	int rc = stsi (info, 1, 2, 1);
  	if (rc != -1)
  	{
  		EBCASC (info->sequence, sizeof(info->sequence));
  		EBCASC (info->plant, sizeof(info->plant));
  	}
  	return rc == -1 ? rc : 0;
  }
  
  static inline int stsi_1_2_2 (struct sysinfo_1_2_2 *info)
  {
  	int rc = stsi (info, 1, 2, 2);
  	return rc == -1 ? rc : 0;
  }
  
  static inline int stsi_2_2_1 (struct sysinfo_2_2_1 *info)
  {
  	int rc = stsi (info, 2, 2, 1);
  	if (rc != -1)
  	{
  		EBCASC (info->sequence, sizeof(info->sequence));
  		EBCASC (info->plant, sizeof(info->plant));
  	}
  	return rc == -1 ? rc : 0;
  }
  
  static inline int stsi_2_2_2 (struct sysinfo_2_2_2 *info)
  {
  	int rc = stsi (info, 2, 2, 2);
  	if (rc != -1)
  	{
  		EBCASC (info->name, sizeof(info->name));
    	}
  	return rc == -1 ? rc : 0;
  }
  
  static inline int stsi_3_2_2 (struct sysinfo_3_2_2 *info)
  {
  	int rc = stsi (info, 3, 2, 2);
  	if (rc != -1)
  	{
  		int i;
  		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));
  		}
  	}
  	return rc == -1 ? rc : 0;
  }
  
  
  static int proc_read_sysinfo(char *page, char **start,
                               off_t off, int count,
                               int *eof, void *data)
  {
  	unsigned long info_page = get_zeroed_page (GFP_KERNEL); 
  	union s390_sysinfo *info = (union s390_sysinfo *) info_page;
  	int len = 0;
  	int level;
  	int i;
  	
  	if (!info)
  		return 0;
  
  	level = stsi_0 ();
  
  	if (level >= 1 && stsi_1_1_1 (&info->sysinfo_1_1_1) == 0)
  	{
  		len += sprintf (page+len, "Manufacturer:         %-16.16s\n",
  				info->sysinfo_1_1_1.manufacturer);
  		len += sprintf (page+len, "Type:                 %-4.4s\n",
  				info->sysinfo_1_1_1.type);
  		len += sprintf (page+len, "Model:                %-16.16s\n",
  				info->sysinfo_1_1_1.model);
  		len += sprintf (page+len, "Sequence Code:        %-16.16s\n",
  				info->sysinfo_1_1_1.sequence);
  		len += sprintf (page+len, "Plant:                %-4.4s\n",
  				info->sysinfo_1_1_1.plant);
  	}
  
  	if (level >= 1 && stsi_1_2_2 (&info->sysinfo_1_2_2) == 0)
  	{
  		len += sprintf (page+len, "\n");
  		len += sprintf (page+len, "CPUs Total:           %d\n",
  				info->sysinfo_1_2_2.cpus_total);
  		len += sprintf (page+len, "CPUs Configured:      %d\n",
  				info->sysinfo_1_2_2.cpus_configured);
  		len += sprintf (page+len, "CPUs Standby:         %d\n",
  				info->sysinfo_1_2_2.cpus_standby);
  		len += sprintf (page+len, "CPUs Reserved:        %d\n",
  				info->sysinfo_1_2_2.cpus_reserved);
  	
  		len += sprintf (page+len, "Capability:           %d\n",
  				info->sysinfo_1_2_2.capability);
  
  		for (i = 2; i <= info->sysinfo_1_2_2.cpus_total; i++)
  			len += sprintf (page+len, "Adjustment %02d-way:    %d\n",
  					i, info->sysinfo_1_2_2.adjustment[i-2]);
  	}
  
  	if (level >= 2 && stsi_2_2_2 (&info->sysinfo_2_2_2) == 0)
  	{
  		len += sprintf (page+len, "\n");
  		len += sprintf (page+len, "LPAR Number:          %d\n",
  				info->sysinfo_2_2_2.lpar_number);
  
  		len += sprintf (page+len, "LPAR Characteristics: ");
  		if (info->sysinfo_2_2_2.characteristics & LPAR_CHAR_DEDICATED)
  			len += sprintf (page+len, "Dedicated ");
  		if (info->sysinfo_2_2_2.characteristics & LPAR_CHAR_SHARED)
  			len += sprintf (page+len, "Shared ");
  		if (info->sysinfo_2_2_2.characteristics & LPAR_CHAR_LIMITED)
  			len += sprintf (page+len, "Limited ");
  		len += sprintf (page+len, "\n");
  	
  		len += sprintf (page+len, "LPAR Name:            %-8.8s\n",
  				info->sysinfo_2_2_2.name);
  	
  		len += sprintf (page+len, "LPAR Adjustment:      %d\n",
  				info->sysinfo_2_2_2.caf);
  	
  		len += sprintf (page+len, "LPAR CPUs Total:      %d\n",
  				info->sysinfo_2_2_2.cpus_total);
  		len += sprintf (page+len, "LPAR CPUs Configured: %d\n",
  				info->sysinfo_2_2_2.cpus_configured);
  		len += sprintf (page+len, "LPAR CPUs Standby:    %d\n",
  				info->sysinfo_2_2_2.cpus_standby);
  		len += sprintf (page+len, "LPAR CPUs Reserved:   %d\n",
  				info->sysinfo_2_2_2.cpus_reserved);
  		len += sprintf (page+len, "LPAR CPUs Dedicated:  %d\n",
  				info->sysinfo_2_2_2.cpus_dedicated);
  		len += sprintf (page+len, "LPAR CPUs Shared:     %d\n",
  				info->sysinfo_2_2_2.cpus_shared);
  	}
  
  	if (level >= 3 && stsi_3_2_2 (&info->sysinfo_3_2_2) == 0)
  	{
  		for (i = 0; i < info->sysinfo_3_2_2.count; i++)
  		{
  			len += sprintf (page+len, "\n");
  			len += sprintf (page+len, "VM%02d Name:            %-8.8s\n",
  					i, info->sysinfo_3_2_2.vm[i].name);
  			len += sprintf (page+len, "VM%02d Control Program: %-16.16s\n",
  					i, info->sysinfo_3_2_2.vm[i].cpi);
  	
  			len += sprintf (page+len, "VM%02d Adjustment:      %d\n",
  					i, info->sysinfo_3_2_2.vm[i].caf);
  	
  			len += sprintf (page+len, "VM%02d CPUs Total:      %d\n",
  					i, info->sysinfo_3_2_2.vm[i].cpus_total);
  			len += sprintf (page+len, "VM%02d CPUs Configured: %d\n",
  					i, info->sysinfo_3_2_2.vm[i].cpus_configured);
  			len += sprintf (page+len, "VM%02d CPUs Standby:    %d\n",
  					i, info->sysinfo_3_2_2.vm[i].cpus_standby);
  			len += sprintf (page+len, "VM%02d CPUs Reserved:   %d\n",
  					i, info->sysinfo_3_2_2.vm[i].cpus_reserved);
  		}
  	}
  
  	free_page (info_page);
          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);
  
  