@@ -65,8 +65,17 @@ static void QEMU_NORETURN arith_excp(int exc, uint64_t mask)
uint64_t helper_load_pcc (void)
{
- /* ??? This isn't a timer for which we have any rate info. */
+#ifndef CONFIG_USER_ONLY
+ /* In system mode we have access to a decent high-resolution clock.
+ In order to make OS-level time accounting work with the RPCC,
+ present it with a well-timed clock fixed at 250MHz. */
+ return (((uint64_t)env->pcc_ofs << 32)
+ | (uint32_t)(qemu_get_clock_ns(vm_clock) >> 2));
+#else
+ /* In user-mode, vm_clock doesn't exist. Just pass through the host cpu
+ clock ticks. Also, don't bother taking PCC_OFS into account. */
return (uint32_t)cpu_get_real_ticks();
+#endif
}
uint64_t helper_load_fpcr (void)
Also include the PCC_OFS in the return value. For user mode we can pretend the PCC_OFS value is always zero. Signed-off-by: Richard Henderson <rth@twiddle.net> --- target-alpha/op_helper.c | 11 ++++++++++- 1 files changed, 10 insertions(+), 1 deletions(-)