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heathrow: implement floppy DMA interrupts.

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This commit is contained in:
Maxim Poliakovski 2023-04-22 22:53:20 +02:00
parent 57ea3c2e66
commit 44478b6937
2 changed files with 33 additions and 11 deletions
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43
devices/ioctrl/heathrow.cpp
View File

@ -91,6 +91,7 @@ HeathrowIC::HeathrowIC() : PCIDevice("mac-io/heathrow"), InterruptCtrl()
this->swim3 = dynamic_cast<Swim3::Swim3Ctrl*>(gMachineObj->get_comp_by_name("Swim3"));
this->floppy_dma = std::unique_ptr<DMAChannel> (new DMAChannel());
this->swim3->set_dma_channel(this->floppy_dma.get());
this->floppy_dma->register_dma_int(this, 2);
// set EMMO pin status (active low)
this->emmo_pin = GET_BIN_PROP("emmo") ^ 1;
@ -259,6 +260,11 @@ uint32_t HeathrowIC::mio_ctrl_read(uint32_t offset, int size) {
case MIO_INT_LEVELS1:
res = this->int_levels1;
break;
case MIO_INT_CLEAR1:
case MIO_INT_CLEAR2:
// some Mac OS drivers reads from those write-only registers
// so we return zero here as real HW does
break;
case MIO_OHARE_ID:
LOG_F(9, "read from MIO:ID register at Address %x", ppc_state.pc);
res = (this->fp_id << 24) | (this->mon_id << 16) | (this->mb_id << 8) |
@ -375,23 +381,38 @@ void HeathrowIC::ack_int(uint32_t irq_id, uint8_t irq_line_state)
this->int_levels1 &= ~irq_id;
}
}
// signal CPU interrupt
if (this->int_events1 || this->int_events2) {
if (!this->cpu_int_latch) {
this->cpu_int_latch = true;
ppc_assert_int();
LOG_F(5, "Heathrow: CPU INT asserted, source: %d", irq_id);
} else {
LOG_F(5, "Heathrow: CPU INT already latched");
}
}
this->signal_cpu_int();
} else {
ABORT_F("Heathrow: native interrupt mode not implemented");
ABORT_F("%s: native interrupt mode not implemented", this->name.c_str());
}
}
void HeathrowIC::ack_dma_int(uint32_t irq_id, uint8_t irq_line_state)
{
if (this->int_mask1 & MACIO_INT_MODE) { // 68k interrupt emulation mode?
this->int_events1 |= irq_id; // signal IRQ line change
this->int_events1 &= this->int_mask1;
// update IRQ line state
if (irq_line_state) {
this->int_levels1 |= irq_id;
} else {
this->int_levels1 &= ~irq_id;
}
this->signal_cpu_int();
} else {
ABORT_F("%s: native interrupt mode not implemented", this->name.c_str());
}
}
void HeathrowIC::signal_cpu_int() {
if (this->int_events1 || this->int_events2) {
if (!this->cpu_int_latch) {
this->cpu_int_latch = true;
ppc_assert_int();
} else {
LOG_F(5, "%s: CPU INT already latched", this->name.c_str());
}
}
}
void HeathrowIC::clear_cpu_int()

1
devices/ioctrl/macio.h
View File

@ -247,6 +247,7 @@ protected:
void notify_bar_change(int bar_num);
void feature_control(const uint32_t value);
void signal_cpu_int();
void clear_cpu_int();
private: