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heathrow: implement native interrupt mode.

This commit is contained in:
Maxim Poliakovski 2023-09-25 03:25:50 +02:00
parent c115a887d8
commit 6cfde29f00
2 changed files with 85 additions and 2 deletions
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2
cpu/ppc/ppcopcodes.cpp
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@ -849,7 +849,7 @@ void dppc_interpreter::ppc_mtmsr() {
// generate External Interrupt Exception
// if CPU interrupt line is asserted
if (ppc_state.msr & 0x8000 && int_pin) {
LOG_F(WARNING, "MTMSR: CPU INT pending, generate CPU exception");
//LOG_F(WARNING, "MTMSR: CPU INT pending, generate CPU exception");
ppc_exception_handler(Except_Type::EXC_EXT_INT, 0);
} else if ((ppc_state.msr & 0x8000) && dec_exception_pending) {
dec_exception_pending = false;

85
devices/ioctrl/heathrow.cpp
View File

@ -387,6 +387,47 @@ uint32_t HeathrowIC::register_dma_int(IntSrc src_id)
void HeathrowIC::ack_int(uint32_t irq_id, uint8_t irq_line_state)
{
#if 1
if (irq_id >= (1 << 20)) { // does this irq_id belong to the second set?
irq_id >>= (20 - 10); // adjust for non-DMA interrupt bits of the 2nd set
// native mode: set IRQ bits in int_events2 on a 0-to-1 transition
// emulated mode: set IRQ bits in int_events2 on all transitions
if ((this->int_mask1 & MACIO_INT_MODE) ||
(irq_line_state && !(this->int_levels2 & irq_id))) {
this->int_events2 |= irq_id;
} else {
this->int_events2 &= ~irq_id;
}
this->int_events2 &= this->int_mask2;
// update IRQ line state
if (irq_line_state) {
this->int_levels2 |= irq_id;
} else {
this->int_levels2 &= ~irq_id;
}
} else {
irq_id <<= 11; // adjust for non-DMA interrupt bits of the first set
// native mode: set IRQ bits in int_events1 on a 0-to-1 transition
// emulated mode: set IRQ bits in int_events1 on all transitions
if ((this->int_mask1 & MACIO_INT_MODE) ||
(irq_line_state && !(this->int_levels1 & irq_id))) {
this->int_events1 |= irq_id;
} else {
this->int_events1 &= ~irq_id;
}
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();
#endif
#if 0
if (this->int_mask1 & MACIO_INT_MODE) { // 68k interrupt emulation mode?
if (irq_id >= (1 << 20)) { // irq_id in the range of int_events2?
irq_id >>= (20 - 10); // adjust for non-DMA interrupt bits of int_events2
@ -411,12 +452,53 @@ void HeathrowIC::ack_int(uint32_t irq_id, uint8_t irq_line_state)
}
this->signal_cpu_int();
} else {
ABORT_F("%s: native interrupt mode not implemented", this->name.c_str());
LOG_F(WARNING, "%s: native interrupt mode not implemented", this->name.c_str());
}
#endif
}
void HeathrowIC::ack_dma_int(uint32_t irq_id, uint8_t irq_line_state)
{
#if 1
if (irq_id >= (1 << 10)) { // does this irq_id belong to the second set?
irq_id >>= 10; // adjust for DMA interrupt bits of the 2nd set
// native mode: set IRQ bits in int_events2 on a 0-to-1 transition
// emulated mode: set IRQ bits in int_events2 on all transitions
if ((this->int_mask1 & MACIO_INT_MODE) ||
(irq_line_state && !(this->int_levels2 & irq_id))) {
this->int_events2 |= irq_id;
} else {
this->int_events2 &= ~irq_id;
}
this->int_events2 &= this->int_mask2;
// update IRQ line state
if (irq_line_state) {
this->int_levels2 |= irq_id;
} else {
this->int_levels2 &= ~irq_id;
}
} else {
// native mode: set IRQ bits in int_events1 on a 0-to-1 transition
// emulated mode: set IRQ bits in int_events1 on all transitions
if ((this->int_mask1 & MACIO_INT_MODE) ||
(irq_line_state && !(this->int_levels1 & irq_id))) {
this->int_events1 |= irq_id;
} else {
this->int_events1 &= ~irq_id;
}
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();
#endif
#if 0
if (this->int_mask1 & MACIO_INT_MODE) { // 68k interrupt emulation mode?
if (irq_id >= (1 << 10)) { // irq_id in the range of int_events2?
irq_id >>= 10; // adjust for DMA interrupt bits of int_events2
@ -442,6 +524,7 @@ void HeathrowIC::ack_dma_int(uint32_t irq_id, uint8_t irq_line_state)
} else {
ABORT_F("%s: native interrupt mode not implemented", this->name.c_str());
}
#endif
}
void HeathrowIC::signal_cpu_int() {