Commit e5214853 authored by Richard Henderson's avatar Richard Henderson Committed by Richard Henderson
Browse files

target-alpha: Use a fixed frequency for the RPCC in system mode. 



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: default avatarRichard Henderson <rth@twiddle.net>
parent 5b450407

target-alpha/op_helper.c

+10 −1
Original line number Diff line number Diff line
@@ -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)