| Michael Holzheu | 0a87c5c | 2007-08-22 13:51:40 +0200 | [diff] [blame] | 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 | /* |
| Michael Holzheu | 0a87c5c | 2007-08-22 13:51:40 +0200 | [diff] [blame] | 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 | #ifdef CONFIG_64BIT |
| 22 | " sam31\n" |
| 23 | " diag %2,2,0x14\n" |
| 24 | " sam64\n" |
| 25 | #else |
| 26 | " diag %2,2,0x14\n" |
| 27 | #endif |
| 28 | " ipm %0\n" |
| 29 | " srl %0,28\n" |
| 30 | : "=d" (rc), "+d" (_ry2) |
| 31 | : "d" (rx), "d" (_ry1) |
| 32 | : "cc"); |
| 33 | |
| 34 | return rc; |
| 35 | } |
| 36 | EXPORT_SYMBOL(diag14); |
| 37 | |
| 38 | /* |
| 39 | * Diagnose 210: Get information about a virtual device |
| 40 | */ |
| 41 | int diag210(struct diag210 *addr) |
| 42 | { |
| 43 | /* |
| 44 | * diag 210 needs its data below the 2GB border, so we |
| 45 | * use a static data area to be sure |
| 46 | */ |
| 47 | static struct diag210 diag210_tmp; |
| 48 | static DEFINE_SPINLOCK(diag210_lock); |
| 49 | unsigned long flags; |
| 50 | int ccode; |
| 51 | |
| 52 | spin_lock_irqsave(&diag210_lock, flags); |
| 53 | diag210_tmp = *addr; |
| 54 | |
| 55 | #ifdef CONFIG_64BIT |
| 56 | asm volatile( |
| 57 | " lhi %0,-1\n" |
| 58 | " sam31\n" |
| 59 | " diag %1,0,0x210\n" |
| 60 | "0: ipm %0\n" |
| 61 | " srl %0,28\n" |
| 62 | "1: sam64\n" |
| 63 | EX_TABLE(0b, 1b) |
| 64 | : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory"); |
| 65 | #else |
| 66 | asm volatile( |
| 67 | " lhi %0,-1\n" |
| 68 | " diag %1,0,0x210\n" |
| 69 | "0: ipm %0\n" |
| 70 | " srl %0,28\n" |
| 71 | "1:\n" |
| 72 | EX_TABLE(0b, 1b) |
| 73 | : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory"); |
| 74 | #endif |
| 75 | |
| 76 | *addr = diag210_tmp; |
| 77 | spin_unlock_irqrestore(&diag210_lock, flags); |
| 78 | |
| 79 | return ccode; |
| 80 | } |
| 81 | EXPORT_SYMBOL(diag210); |