@@ -71,6 +71,12 @@ static void mos6522_set_irq(void *opaque, int n, int level)
}
mos6522_update_irq(s);
+
+ if (level) {
+ s->last_irq_levels |= 1 << n;
+ } else {
+ s->last_irq_levels &= ~(1 << n);
+ }
}
static uint64_t get_counter_value(MOS6522State *s, MOS6522Timer *ti)
@@ -532,8 +538,8 @@ static const VMStateDescription vmstate_mos6522_timer = {
const VMStateDescription vmstate_mos6522 = {
.name = "mos6522",
- .version_id = 0,
- .minimum_version_id = 0,
+ .version_id = 1,
+ .minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8(a, MOS6522State),
VMSTATE_UINT8(b, MOS6522State),
@@ -544,6 +550,7 @@ const VMStateDescription vmstate_mos6522 = {
VMSTATE_UINT8(pcr, MOS6522State),
VMSTATE_UINT8(ifr, MOS6522State),
VMSTATE_UINT8(ier, MOS6522State),
+ VMSTATE_UINT8(last_irq_levels, MOS6522State),
VMSTATE_STRUCT_ARRAY(timers, MOS6522State, 2, 0,
vmstate_mos6522_timer, MOS6522Timer),
VMSTATE_END_OF_LIST()
@@ -131,6 +131,7 @@ struct MOS6522State {
uint64_t frequency;
qemu_irq irq;
+ uint8_t last_irq_levels;
};
#define TYPE_MOS6522 "mos6522"
To detect edge-triggered IRQs it is necessary to store the last state of each IRQ in a last_irq_levels bitmap. Note: this is a migration break for machines which use mos6522 instances which are g3beige/mac99 (PPC) and q800 (m68k). Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> --- hw/misc/mos6522.c | 11 +++++++++-- include/hw/misc/mos6522.h | 1 + 2 files changed, 10 insertions(+), 2 deletions(-)