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 */
14int 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}
32EXPORT_SYMBOL(diag14);
33
34/*
35 * Diagnose 210: Get information about a virtual device
36 */
37int 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}
66EXPORT_SYMBOL(diag210);
67