1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_DIAG288_H
#define _ASM_S390_DIAG288_H
#include <asm/asm-extable.h>
#include <asm/types.h>
#define MIN_INTERVAL 15 /* Minimal time supported by diag288 */
#define MAX_INTERVAL 3600 /* One hour should be enough - pure estimation */
#define WDT_DEFAULT_TIMEOUT 30
/* Function codes - init, change, cancel */
#define WDT_FUNC_INIT 0
#define WDT_FUNC_CHANGE 1
#define WDT_FUNC_CANCEL 2
#define WDT_FUNC_CONCEAL 0x80000000
/* Action codes for LPAR watchdog */
#define LPARWDT_RESTART 0
static inline int __diag288(unsigned int func, unsigned int timeout,
unsigned long action, unsigned int len)
{
union register_pair r1 = { .even = func, .odd = timeout, };
union register_pair r3 = { .even = action, .odd = len, };
int rc = -EINVAL;
asm volatile(
" diag %[r1],%[r3],0x288\n"
"0: lhi %[rc],0\n"
"1:"
EX_TABLE(0b, 1b)
: [rc] "+d" (rc)
: [r1] "d" (r1.pair), [r3] "d" (r3.pair)
: "cc", "memory");
return rc;
}
#endif /* _ASM_S390_DIAG288_H */
|
