Message ID | 20210311100505.22596-6-mark.cave-ayland@ilande.co.uk (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | mac_via: fixes and improvements | expand |
On Thu, 11 Mar 2021, Mark Cave-Ayland wrote: > According to the "Guide To The Macintosh Family Hardware", the 60Hz VIA1 timer > on newer Macs such as the Quadra only exists for compatibility with old software > and is no longer synced to the VBL interval. > > Rename the VBL timer to 60Hz timer to emphasise this and to prevent confusion > when the real VBL interrupt (now handled as a NuBus slot interrupt) is added in > future. > > Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> > Reviewed-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu> > --- > hw/misc/mac_via.c | 41 ++++++++++++++++++++------------------- > include/hw/misc/mac_via.h | 8 ++++---- > 2 files changed, 25 insertions(+), 24 deletions(-) > > diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c > index 76f31b8cae..f994fefa7c 100644 > --- a/hw/misc/mac_via.c > +++ b/hw/misc/mac_via.c > @@ -297,18 +297,18 @@ enum { > REG_EMPTY = 0xff, > }; > > -static void via1_VBL_update(MOS6522Q800VIA1State *v1s) > +static void via1_sixty_hz_update(MOS6522Q800VIA1State *v1s) > { > MOS6522State *s = MOS6522(v1s); > > /* 60 Hz irq */ > - v1s->next_VBL = (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 16630) / > - 16630 * 16630; > + v1s->next_sixty_hz = (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 16630) / > + 16630 * 16630; > > - if (s->ier & VIA1_IRQ_VBLANK) { > - timer_mod(v1s->VBL_timer, v1s->next_VBL); > + if (s->ier & VIA1_IRQ_60HZ) { > + timer_mod(v1s->sixty_hz_timer, v1s->next_sixty_hz); > } else { > - timer_del(v1s->VBL_timer); > + timer_del(v1s->sixty_hz_timer); > } > } > > @@ -325,16 +325,16 @@ static void via1_one_second_update(MOS6522Q800VIA1State *v1s) > } > } > > -static void via1_VBL(void *opaque) > +static void via1_sixty_hz(void *opaque) > { > MOS6522Q800VIA1State *v1s = opaque; > MOS6522State *s = MOS6522(v1s); > MOS6522DeviceClass *mdc = MOS6522_GET_CLASS(s); > > - s->ifr |= VIA1_IRQ_VBLANK; > + s->ifr |= VIA1_IRQ_60HZ; > mdc->update_irq(s); > > - via1_VBL_update(v1s); > + via1_sixty_hz_update(v1s); > } > > static void via1_one_second(void *opaque) > @@ -897,12 +897,12 @@ static uint64_t mos6522_q800_via1_read(void *opaque, hwaddr addr, unsigned size) > > /* > * If IRQs are disabled, timers are disabled, but we need to update > - * VIA1_IRQ_VBLANK and VIA1_IRQ_ONE_SECOND bits in the IFR > + * VIA1_IRQ_60HZ and VIA1_IRQ_ONE_SECOND bits in the IFR > */ > > - if (now >= s->next_VBL) { > - ms->ifr |= VIA1_IRQ_VBLANK; > - via1_VBL_update(s); > + if (now >= s->next_sixty_hz) { > + ms->ifr |= VIA1_IRQ_60HZ; > + via1_sixty_hz_update(s); > } > if (now >= s->next_second) { > ms->ifr |= VIA1_IRQ_ONE_SECOND; > @@ -933,7 +933,7 @@ static void mos6522_q800_via1_write(void *opaque, hwaddr addr, uint64_t val, > } > > via1_one_second_update(v1s); > - via1_VBL_update(v1s); > + via1_sixty_hz_update(v1s); > } > > static const MemoryRegionOps mos6522_q800_via1_ops = { > @@ -983,8 +983,8 @@ static void mac_via_reset(DeviceState *dev) > > adb_set_autopoll_enabled(adb_bus, true); > > - timer_del(v1s->VBL_timer); > - v1s->next_VBL = 0; > + timer_del(v1s->sixty_hz_timer); > + v1s->next_sixty_hz = 0; > timer_del(v1s->one_second_timer); > v1s->next_second = 0; > > @@ -1026,8 +1026,9 @@ static void mac_via_realize(DeviceState *dev, Error **errp) > m->mos6522_via1.one_second_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, > via1_one_second, > &m->mos6522_via1); > - m->mos6522_via1.VBL_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, via1_VBL, > - &m->mos6522_via1); > + m->mos6522_via1.sixty_hz_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, > + via1_sixty_hz, > + &m->mos6522_via1); > > qemu_get_timedate(&tm, 0); > m->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET; > @@ -1116,8 +1117,8 @@ static const VMStateDescription vmstate_mac_via = { > VMSTATE_BUFFER(mos6522_via1.PRAM, MacVIAState), > VMSTATE_TIMER_PTR(mos6522_via1.one_second_timer, MacVIAState), > VMSTATE_INT64(mos6522_via1.next_second, MacVIAState), > - VMSTATE_TIMER_PTR(mos6522_via1.VBL_timer, MacVIAState), > - VMSTATE_INT64(mos6522_via1.next_VBL, MacVIAState), > + VMSTATE_TIMER_PTR(mos6522_via1.sixty_hz_timer, MacVIAState), > + VMSTATE_INT64(mos6522_via1.next_sixty_hz, MacVIAState), > VMSTATE_STRUCT(mos6522_via2.parent_obj, MacVIAState, 0, vmstate_mos6522, > MOS6522State), > /* RTC */ > diff --git a/include/hw/misc/mac_via.h b/include/hw/misc/mac_via.h > index a59f0bd422..3058b30685 100644 > --- a/include/hw/misc/mac_via.h > +++ b/include/hw/misc/mac_via.h > @@ -17,7 +17,7 @@ > > /* VIA 1 */ > #define VIA1_IRQ_ONE_SECOND_BIT 0 > -#define VIA1_IRQ_VBLANK_BIT 1 > +#define VIA1_IRQ_60HZ_BIT 1 > #define VIA1_IRQ_ADB_READY_BIT 2 > #define VIA1_IRQ_ADB_DATA_BIT 3 > #define VIA1_IRQ_ADB_CLOCK_BIT 4 > @@ -25,7 +25,7 @@ > #define VIA1_IRQ_NB 8 > > #define VIA1_IRQ_ONE_SECOND (1 << VIA1_IRQ_ONE_SECOND_BIT) > -#define VIA1_IRQ_VBLANK (1 << VIA1_IRQ_VBLANK_BIT) > +#define VIA1_IRQ_60HZ (1 << VIA1_IRQ_60HZ_BIT) > #define VIA1_IRQ_ADB_READY (1 << VIA1_IRQ_ADB_READY_BIT) > #define VIA1_IRQ_ADB_DATA (1 << VIA1_IRQ_ADB_DATA_BIT) > #define VIA1_IRQ_ADB_CLOCK (1 << VIA1_IRQ_ADB_CLOCK_BIT) > @@ -45,8 +45,8 @@ struct MOS6522Q800VIA1State { > /* external timers */ > QEMUTimer *one_second_timer; > int64_t next_second; > - QEMUTimer *VBL_timer; > - int64_t next_VBL; > + QEMUTimer *sixty_hz_timer; > + int64_t next_sixty_hz; > }; > > >
diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c index 76f31b8cae..f994fefa7c 100644 --- a/hw/misc/mac_via.c +++ b/hw/misc/mac_via.c @@ -297,18 +297,18 @@ enum { REG_EMPTY = 0xff, }; -static void via1_VBL_update(MOS6522Q800VIA1State *v1s) +static void via1_sixty_hz_update(MOS6522Q800VIA1State *v1s) { MOS6522State *s = MOS6522(v1s); /* 60 Hz irq */ - v1s->next_VBL = (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 16630) / - 16630 * 16630; + v1s->next_sixty_hz = (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 16630) / + 16630 * 16630; - if (s->ier & VIA1_IRQ_VBLANK) { - timer_mod(v1s->VBL_timer, v1s->next_VBL); + if (s->ier & VIA1_IRQ_60HZ) { + timer_mod(v1s->sixty_hz_timer, v1s->next_sixty_hz); } else { - timer_del(v1s->VBL_timer); + timer_del(v1s->sixty_hz_timer); } } @@ -325,16 +325,16 @@ static void via1_one_second_update(MOS6522Q800VIA1State *v1s) } } -static void via1_VBL(void *opaque) +static void via1_sixty_hz(void *opaque) { MOS6522Q800VIA1State *v1s = opaque; MOS6522State *s = MOS6522(v1s); MOS6522DeviceClass *mdc = MOS6522_GET_CLASS(s); - s->ifr |= VIA1_IRQ_VBLANK; + s->ifr |= VIA1_IRQ_60HZ; mdc->update_irq(s); - via1_VBL_update(v1s); + via1_sixty_hz_update(v1s); } static void via1_one_second(void *opaque) @@ -897,12 +897,12 @@ static uint64_t mos6522_q800_via1_read(void *opaque, hwaddr addr, unsigned size) /* * If IRQs are disabled, timers are disabled, but we need to update - * VIA1_IRQ_VBLANK and VIA1_IRQ_ONE_SECOND bits in the IFR + * VIA1_IRQ_60HZ and VIA1_IRQ_ONE_SECOND bits in the IFR */ - if (now >= s->next_VBL) { - ms->ifr |= VIA1_IRQ_VBLANK; - via1_VBL_update(s); + if (now >= s->next_sixty_hz) { + ms->ifr |= VIA1_IRQ_60HZ; + via1_sixty_hz_update(s); } if (now >= s->next_second) { ms->ifr |= VIA1_IRQ_ONE_SECOND; @@ -933,7 +933,7 @@ static void mos6522_q800_via1_write(void *opaque, hwaddr addr, uint64_t val, } via1_one_second_update(v1s); - via1_VBL_update(v1s); + via1_sixty_hz_update(v1s); } static const MemoryRegionOps mos6522_q800_via1_ops = { @@ -983,8 +983,8 @@ static void mac_via_reset(DeviceState *dev) adb_set_autopoll_enabled(adb_bus, true); - timer_del(v1s->VBL_timer); - v1s->next_VBL = 0; + timer_del(v1s->sixty_hz_timer); + v1s->next_sixty_hz = 0; timer_del(v1s->one_second_timer); v1s->next_second = 0; @@ -1026,8 +1026,9 @@ static void mac_via_realize(DeviceState *dev, Error **errp) m->mos6522_via1.one_second_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, via1_one_second, &m->mos6522_via1); - m->mos6522_via1.VBL_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, via1_VBL, - &m->mos6522_via1); + m->mos6522_via1.sixty_hz_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, + via1_sixty_hz, + &m->mos6522_via1); qemu_get_timedate(&tm, 0); m->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET; @@ -1116,8 +1117,8 @@ static const VMStateDescription vmstate_mac_via = { VMSTATE_BUFFER(mos6522_via1.PRAM, MacVIAState), VMSTATE_TIMER_PTR(mos6522_via1.one_second_timer, MacVIAState), VMSTATE_INT64(mos6522_via1.next_second, MacVIAState), - VMSTATE_TIMER_PTR(mos6522_via1.VBL_timer, MacVIAState), - VMSTATE_INT64(mos6522_via1.next_VBL, MacVIAState), + VMSTATE_TIMER_PTR(mos6522_via1.sixty_hz_timer, MacVIAState), + VMSTATE_INT64(mos6522_via1.next_sixty_hz, MacVIAState), VMSTATE_STRUCT(mos6522_via2.parent_obj, MacVIAState, 0, vmstate_mos6522, MOS6522State), /* RTC */ diff --git a/include/hw/misc/mac_via.h b/include/hw/misc/mac_via.h index a59f0bd422..3058b30685 100644 --- a/include/hw/misc/mac_via.h +++ b/include/hw/misc/mac_via.h @@ -17,7 +17,7 @@ /* VIA 1 */ #define VIA1_IRQ_ONE_SECOND_BIT 0 -#define VIA1_IRQ_VBLANK_BIT 1 +#define VIA1_IRQ_60HZ_BIT 1 #define VIA1_IRQ_ADB_READY_BIT 2 #define VIA1_IRQ_ADB_DATA_BIT 3 #define VIA1_IRQ_ADB_CLOCK_BIT 4 @@ -25,7 +25,7 @@ #define VIA1_IRQ_NB 8 #define VIA1_IRQ_ONE_SECOND (1 << VIA1_IRQ_ONE_SECOND_BIT) -#define VIA1_IRQ_VBLANK (1 << VIA1_IRQ_VBLANK_BIT) +#define VIA1_IRQ_60HZ (1 << VIA1_IRQ_60HZ_BIT) #define VIA1_IRQ_ADB_READY (1 << VIA1_IRQ_ADB_READY_BIT) #define VIA1_IRQ_ADB_DATA (1 << VIA1_IRQ_ADB_DATA_BIT) #define VIA1_IRQ_ADB_CLOCK (1 << VIA1_IRQ_ADB_CLOCK_BIT) @@ -45,8 +45,8 @@ struct MOS6522Q800VIA1State { /* external timers */ QEMUTimer *one_second_timer; int64_t next_second; - QEMUTimer *VBL_timer; - int64_t next_VBL; + QEMUTimer *sixty_hz_timer; + int64_t next_sixty_hz; };