/* * 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); int get_cpu_capability(unsigned int *capability) { struct sysinfo_1_2_2 *info; int rc; info = (void *) get_zeroed_page(GFP_KERNEL); if (!info) return -ENOMEM; rc = stsi(info, 1, 2, 2); if (rc == -ENOSYS) goto out; rc = 0; *capability = info->capability; out: free_page((unsigned long) info); return rc; } /* * 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); }