diff options
Diffstat (limited to 'pc-bios/s390-ccw/helper.h')
| -rw-r--r-- | pc-bios/s390-ccw/helper.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/pc-bios/s390-ccw/helper.h b/pc-bios/s390-ccw/helper.h index 78d5bc7442..dfcfea0ff0 100644 --- a/pc-bios/s390-ccw/helper.h +++ b/pc-bios/s390-ccw/helper.h @@ -14,11 +14,12 @@ #define S390_CCW_HELPER_H #include "s390-ccw.h" +#include "s390-time.h" /* Avoids compiler warnings when casting a pointer to a u32 */ static inline uint32_t ptr2u32(void *ptr) { - IPL_assert((uint64_t)ptr <= 0xffffffff, "ptr2u32: ptr too large"); + IPL_assert((uint64_t)ptr <= 0xffffffffull, "ptr2u32: ptr too large"); return (uint32_t)(uint64_t)ptr; } @@ -28,4 +29,20 @@ static inline void *u32toptr(uint32_t n) return (void *)(uint64_t)n; } +static inline void yield(void) +{ + asm volatile ("diag 0,0,0x44" + : : + : "memory", "cc"); +} + +static inline void sleep(unsigned int seconds) +{ + ulong target = get_time_seconds() + seconds; + + while (get_time_seconds() < target) { + yield(); + } +} + #endif |