mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-08-31 10:29:40 +00:00
398 lines
12 KiB
C++
398 lines
12 KiB
C++
/*
|
|
DingusPPC - The Experimental PowerPC Macintosh emulator
|
|
Copyright (C) 2018-22 divingkatae and maximum
|
|
(theweirdo) spatium
|
|
|
|
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <cpu/ppc/ppcemu.h>
|
|
#include <devices/deviceregistry.h>
|
|
#include <devices/common/dbdma.h>
|
|
#include <devices/common/hwcomponent.h>
|
|
#include <devices/common/viacuda.h>
|
|
#include <devices/floppy/swim3.h>
|
|
#include <devices/ioctrl/macio.h>
|
|
#include <devices/serial/escc.h>
|
|
#include <devices/sound/awacs.h>
|
|
#include <endianswap.h>
|
|
#include <loguru.hpp>
|
|
#include <machines/machinebase.h>
|
|
|
|
#include <cinttypes>
|
|
#include <functional>
|
|
#include <iostream>
|
|
#include <memory>
|
|
|
|
/** Heathrow Mac I/O device emulation.
|
|
|
|
Author: Max Poliakovski
|
|
*/
|
|
|
|
using namespace std;
|
|
|
|
HeathrowIC::HeathrowIC() : PCIDevice("mac-io/heathrow"), InterruptCtrl()
|
|
{
|
|
supports_types(HWCompType::MMIO_DEV | HWCompType::INT_CTRL);
|
|
|
|
// populate my PCI config header
|
|
this->vendor_id = PCI_VENDOR_APPLE;
|
|
this->device_id = 0x0010;
|
|
this->class_rev = 0xFF000001;
|
|
this->cache_ln_sz = 8;
|
|
this->lat_timer = 0x40;
|
|
this->bars_cfg[0] = 0xFFF80000UL; // declare 512Kb of memory-mapped I/O space
|
|
|
|
this->pci_notify_bar_change = [this](int bar_num) {
|
|
this->notify_bar_change(bar_num);
|
|
};
|
|
|
|
// NVRAM connection
|
|
this->nvram = dynamic_cast<NVram*>(gMachineObj->get_comp_by_name("NVRAM"));
|
|
|
|
// connect Cuda
|
|
this->viacuda = dynamic_cast<ViaCuda*>(gMachineObj->get_comp_by_name("ViaCuda"));
|
|
|
|
// initialize sound chip and its DMA output channel, then wire them together
|
|
this->screamer = std::unique_ptr<AwacsScreamer> (new AwacsScreamer());
|
|
this->snd_out_dma = std::unique_ptr<DMAChannel> (new DMAChannel());
|
|
this->screamer->set_dma_out(this->snd_out_dma.get());
|
|
this->snd_out_dma->set_callbacks(
|
|
std::bind(&AwacsScreamer::dma_start, this->screamer.get()),
|
|
std::bind(&AwacsScreamer::dma_end, this->screamer.get())
|
|
);
|
|
|
|
// connect SCSI HW
|
|
this->mesh = dynamic_cast<MESHController*>(gMachineObj->get_comp_by_name("Mesh"));
|
|
|
|
// connect serial HW
|
|
this->escc = dynamic_cast<EsccController*>(gMachineObj->get_comp_by_name("Escc"));
|
|
|
|
// connect floppy disk HW and initialize its DMA channel
|
|
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());
|
|
|
|
// set EMMO pin status (active low)
|
|
this->emmo_pin = GET_BIN_PROP("emmo") ^ 1;
|
|
}
|
|
|
|
void HeathrowIC::notify_bar_change(int bar_num)
|
|
{
|
|
if (bar_num) // only BAR0 is supported
|
|
return;
|
|
|
|
if (this->base_addr != (this->bars[bar_num] & 0xFFFFFFF0UL)) {
|
|
if (this->base_addr) {
|
|
LOG_F(WARNING, "Heathrow: deallocating I/O memory not implemented");
|
|
}
|
|
this->base_addr = this->bars[0] & 0xFFFFFFF0UL;
|
|
this->host_instance->pci_register_mmio_region(this->base_addr, 0x80000, this);
|
|
LOG_F(INFO, "%s: base address set to 0x%X", this->pci_name.c_str(), this->base_addr);
|
|
}
|
|
}
|
|
|
|
uint32_t HeathrowIC::dma_read(uint32_t offset, int size) {
|
|
switch (offset >> 8) {
|
|
case 1:
|
|
return this->floppy_dma->reg_read(offset & 0xFF, size);
|
|
case 8:
|
|
return this->snd_out_dma->reg_read(offset & 0xFF, size);
|
|
break;
|
|
default:
|
|
LOG_F(WARNING, "Unsupported DMA channel read, offset=0x%X", offset);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void HeathrowIC::dma_write(uint32_t offset, uint32_t value, int size) {
|
|
switch (offset >> 8) {
|
|
case 1:
|
|
this->floppy_dma->reg_write(offset & 0xFF, value, size);
|
|
break;
|
|
case 8:
|
|
this->snd_out_dma->reg_write(offset & 0xFF, value, size);
|
|
break;
|
|
default:
|
|
LOG_F(WARNING, "Unsupported DMA channel write, offset=0x%X, val=0x%X", offset, value);
|
|
}
|
|
}
|
|
|
|
|
|
uint32_t HeathrowIC::read(uint32_t rgn_start, uint32_t offset, int size) {
|
|
uint32_t res = 0;
|
|
|
|
LOG_F(9, "%s: reading from offset %x", this->name.c_str(), offset);
|
|
|
|
unsigned sub_addr = (offset >> 12) & 0x7F;
|
|
|
|
switch (sub_addr) {
|
|
case 0:
|
|
res = mio_ctrl_read(offset, size);
|
|
break;
|
|
case 8:
|
|
res = dma_read(offset - 0x8000, size);
|
|
break;
|
|
case 0x10:
|
|
res = this->mesh->read((offset >> 4) & 0xF);
|
|
break;
|
|
case 0x12: // ESCC compatible addressing
|
|
if ((offset & 0xFF) < 16) {
|
|
return this->escc->read(compat_to_macrisc[(offset >> 1) & 0xF]);
|
|
}
|
|
// fallthrough
|
|
case 0x13: // ESCC MacRISC addressing
|
|
return this->escc->read((offset >> 4) & 0xF);
|
|
case 0x14:
|
|
res = this->screamer->snd_ctrl_read(offset - 0x14000, size);
|
|
break;
|
|
case 0x15: // SWIM3
|
|
return this->swim3->read((offset >> 4 )& 0xF);
|
|
case 0x16:
|
|
case 0x17:
|
|
res = this->viacuda->read((offset - 0x16000) >> 9);
|
|
break;
|
|
default:
|
|
if (sub_addr >= 0x60) {
|
|
res = this->nvram->read_byte((offset - 0x60000) >> 4);
|
|
} else {
|
|
LOG_F(WARNING, "Attempting to read unmapped I/O space: %x", offset);
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
void HeathrowIC::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size) {
|
|
LOG_F(9, "%s: writing to offset %x", this->name.c_str(), offset);
|
|
|
|
unsigned sub_addr = (offset >> 12) & 0x7F;
|
|
|
|
switch (sub_addr) {
|
|
case 0:
|
|
mio_ctrl_write(offset, value, size);
|
|
break;
|
|
case 8:
|
|
dma_write(offset - 0x8000, value, size);
|
|
break;
|
|
case 0x10:
|
|
this->mesh->write((offset >> 4) & 0xF, value);
|
|
break;
|
|
case 0x12: // ESCC compatible addressing
|
|
if ((offset & 0xFF) < 16) {
|
|
this->escc->write(compat_to_macrisc[(offset >> 1) & 0xF], value);
|
|
break;
|
|
}
|
|
// fallthrough
|
|
case 0x13: // ESCC MacRISC addressing
|
|
this->escc->write((offset >> 4) & 0xF, value);
|
|
break;
|
|
case 0x14:
|
|
this->screamer->snd_ctrl_write(offset - 0x14000, value, size);
|
|
break;
|
|
case 0x15: // SWIM3
|
|
this->swim3->write((offset >> 4) & 0xF, value);
|
|
break;
|
|
case 0x16:
|
|
case 0x17:
|
|
this->viacuda->write((offset - 0x16000) >> 9, value);
|
|
break;
|
|
default:
|
|
if (sub_addr >= 0x60) {
|
|
this->nvram->write_byte((offset - 0x60000) >> 4, value);
|
|
} else {
|
|
LOG_F(WARNING, "Attempting to write to unmapped I/O space: %x", offset);
|
|
}
|
|
}
|
|
}
|
|
|
|
uint32_t HeathrowIC::mio_ctrl_read(uint32_t offset, int size) {
|
|
uint32_t res = 0;
|
|
|
|
switch (offset & 0xFC) {
|
|
case MIO_INT_EVENTS2:
|
|
res = this->int_events2;
|
|
break;
|
|
case MIO_INT_MASK2:
|
|
res = this->int_mask2;
|
|
break;
|
|
case MIO_INT_LEVELS2:
|
|
res = this->int_levels2;
|
|
break;
|
|
case MIO_INT_EVENTS1:
|
|
res = this->int_events1;
|
|
break;
|
|
case MIO_INT_MASK1:
|
|
res = this->int_mask1;
|
|
break;
|
|
case MIO_INT_LEVELS1:
|
|
res = this->int_levels1;
|
|
break;
|
|
case MIO_HEAT_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) |
|
|
(this->cpu_id | (this->emmo_pin << 4));
|
|
break;
|
|
case MIO_HEAT_FEAT_CTRL:
|
|
LOG_F(9, "read from MIO:Feat_Ctrl register");
|
|
res = this->feat_ctrl;
|
|
break;
|
|
default:
|
|
LOG_F(WARNING, "read from unknown MIO register at %x", offset);
|
|
break;
|
|
}
|
|
|
|
return BYTESWAP_32(res);
|
|
}
|
|
|
|
void HeathrowIC::mio_ctrl_write(uint32_t offset, uint32_t value, int size) {
|
|
switch (offset & 0xFC) {
|
|
case MIO_INT_MASK2:
|
|
this->int_mask2 |= BYTESWAP_32(value) & ~MACIO_INT_MODE;
|
|
break;
|
|
case MIO_INT_CLEAR2:
|
|
if (value & MACIO_INT_CLR) {
|
|
this->int_events2 = 0;
|
|
clear_cpu_int();
|
|
} else {
|
|
this->int_events2 &= BYTESWAP_32(value);
|
|
}
|
|
break;
|
|
case MIO_INT_MASK1:
|
|
this->int_mask1 = BYTESWAP_32(value);
|
|
// copy IntMode bit to InterruptMask2 register
|
|
this->int_mask2 = (this->int_mask2 & ~MACIO_INT_MODE) | (this->int_mask1 & MACIO_INT_MODE);
|
|
break;
|
|
case MIO_INT_CLEAR1:
|
|
if (value & MACIO_INT_CLR) {
|
|
this->int_events1 = 0;
|
|
clear_cpu_int();
|
|
} else {
|
|
this->int_events1 &= BYTESWAP_32(value);
|
|
}
|
|
break;
|
|
case MIO_HEAT_ID:
|
|
LOG_F(WARNING, "Attempted to write %x to MIO:ID at %x; Address : %x", value, offset, ppc_state.pc);
|
|
break;
|
|
case MIO_HEAT_FEAT_CTRL:
|
|
this->feature_control(BYTESWAP_32(value));
|
|
break;
|
|
case 0x3C:
|
|
LOG_F(9, "write %x to MIO:Aux_Ctrl register", value);
|
|
this->aux_ctrl = value;
|
|
break;
|
|
default:
|
|
LOG_F(WARNING, "write %x to unknown MIO register at %x", value, offset);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void HeathrowIC::feature_control(const uint32_t value)
|
|
{
|
|
LOG_F(9, "write %x to MIO:Feat_Ctrl register", value);
|
|
|
|
this->feat_ctrl = value;
|
|
|
|
if (!(this->feat_ctrl & 1)) {
|
|
LOG_F(9, "Heathrow: Monitor sense enabled");
|
|
} else {
|
|
LOG_F(9, "Heathrow: Monitor sense disabled");
|
|
}
|
|
}
|
|
|
|
uint32_t HeathrowIC::register_dev_int(IntSrc src_id)
|
|
{
|
|
switch (src_id) {
|
|
case IntSrc::VIA_CUDA:
|
|
return 1 << 7;
|
|
case IntSrc::SCSI1:
|
|
return 1 << 1;
|
|
case IntSrc::SWIM3:
|
|
return 1 << 8;
|
|
default:
|
|
ABORT_F("Heathrow: unknown interrupt source %d", src_id);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
uint32_t HeathrowIC::register_dma_int(IntSrc src_id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void HeathrowIC::ack_int(uint32_t irq_id, uint8_t irq_line_state)
|
|
{
|
|
if (this->int_mask1 & MACIO_INT_MODE) { // 68k interrupt emulation mode?
|
|
if (irq_id > 0x200000) {
|
|
irq_id >>= 21;
|
|
this->int_events2 |= irq_id; // signal IRQ line change
|
|
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;
|
|
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;
|
|
}
|
|
}
|
|
// 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");
|
|
}
|
|
}
|
|
} else {
|
|
ABORT_F("Heathrow: native interrupt mode not implemented");
|
|
}
|
|
}
|
|
|
|
void HeathrowIC::ack_dma_int(uint32_t irq_id, uint8_t irq_line_state)
|
|
{
|
|
}
|
|
|
|
void HeathrowIC::clear_cpu_int()
|
|
{
|
|
if (!this->int_events1 && !this->int_events2) {
|
|
this->cpu_int_latch = false;
|
|
ppc_release_int();
|
|
LOG_F(5, "Heathrow: CPU INT latch cleared");
|
|
}
|
|
}
|
|
|
|
static const vector<string> Heathrow_Subdevices = {
|
|
"NVRAM", "ViaCuda", "Mesh", "Escc", "Swim3"
|
|
};
|
|
|
|
static const DeviceDescription Heathrow_Descriptor = {
|
|
HeathrowIC::create, Heathrow_Subdevices, {}
|
|
};
|
|
|
|
REGISTER_DEVICE(Heathrow, Heathrow_Descriptor);
|