| /* 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 */ |
