1 /* 2 * Implementation of s390 diagnose codes 3 * 4 * Copyright IBM Corp. 2007 5 * Author(s): Michael Holzheu <holzheu@de.ibm.com> 6 */ 7 8 #include <linux/module.h> 9 #include <asm/diag.h> 10 11 /* 12 * Diagnose 14: Input spool file manipulation 13 */ 14 int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode) 15 { 16 register unsigned long _ry1 asm("2") = ry1; 17 register unsigned long _ry2 asm("3") = subcode; 18 int rc = 0; 19 20 asm volatile( 21 " sam31\n" 22 " diag %2,2,0x14\n" 23 " sam64\n" 24 " ipm %0\n" 25 " srl %0,28\n" 26 : "=d" (rc), "+d" (_ry2) 27 : "d" (rx), "d" (_ry1) 28 : "cc"); 29 30 return rc; 31 } 32 EXPORT_SYMBOL(diag14); 33 34 /* 35 * Diagnose 210: Get information about a virtual device 36 */ 37 int diag210(struct diag210 *addr) 38 { 39 /* 40 * diag 210 needs its data below the 2GB border, so we 41 * use a static data area to be sure 42 */ 43 static struct diag210 diag210_tmp; 44 static DEFINE_SPINLOCK(diag210_lock); 45 unsigned long flags; 46 int ccode; 47 48 spin_lock_irqsave(&diag210_lock, flags); 49 diag210_tmp = *addr; 50 51 asm volatile( 52 " lhi %0,-1\n" 53 " sam31\n" 54 " diag %1,0,0x210\n" 55 "0: ipm %0\n" 56 " srl %0,28\n" 57 "1: sam64\n" 58 EX_TABLE(0b, 1b) 59 : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory"); 60 61 *addr = diag210_tmp; 62 spin_unlock_irqrestore(&diag210_lock, flags); 63 64 return ccode; 65 } 66 EXPORT_SYMBOL(diag210); 67