Commit d696760b authored by Alexander Graf's avatar Alexander Graf
Browse files

PPC: mac99: Fix core99 timer frequency 



There is a special timer in the mac99 machine that we recently started
to emulate. Unfortunately we emulated it in the wrong frequency.

This patch adapts the frequency Mac OS X uses to evaluate results from
this timer, making calculations it bases off of it work.

Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 6fd33a75

hw/misc/macio/macio.c

+7 −2
Original line number Diff line number Diff line
@@ -243,13 +243,18 @@ static void timer_write(void *opaque, hwaddr addr, uint64_t value, 
static uint64_t timer_read(void *opaque, hwaddr addr, unsigned size)

{

    uint32_t value = 0;

    uint64_t systime = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);

    uint64_t kltime;



    kltime = muldiv64(systime, 4194300, get_ticks_per_sec() * 4);

    kltime = muldiv64(kltime, 18432000, 1048575);



    switch (addr) {

    case 0x38:

        value = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);

        value = kltime;

        break;

    case 0x3c:

        value = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) >> 32;

        value = kltime >> 32;

        break;

    }