diff options
Diffstat (limited to 'include/qemu')
-rw-r--r-- | include/qemu/timer.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/qemu/timer.h b/include/qemu/timer.h index 9a91cb1..9a366e5 100644 --- a/include/qemu/timer.h +++ b/include/qemu/timer.h @@ -979,6 +979,28 @@ static inline int64_t cpu_get_host_ticks(void) return cur - ofs; } +#elif defined(__riscv) && __riscv_xlen == 32 +static inline int64_t cpu_get_host_ticks(void) +{ + uint32_t lo, hi, tmph; + do { + asm volatile("RDTIMEH %0\n\t" + "RDTIME %1\n\t" + "RDTIMEH %2" + : "=r"(hi), "=r"(lo), "=r"(tmph)); + } while (unlikely(tmph != hi)); + return lo | (uint64_t)hi << 32; +} + +#elif defined(__riscv) && __riscv_xlen > 32 +static inline int64_t cpu_get_host_ticks(void) +{ + int64_t val; + + asm volatile("RDTIME %0" : "=r"(val)); + return val; +} + #else /* The host CPU doesn't have an easily accessible cycle counter. Just return a monotonically increasing value. This will be |