dingusppc/devices/ioctrl/ohare.cpp

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/*
DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-24 divingkatae and maximum
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(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>
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#include <devices/ioctrl/macio.h>
#include <endianswap.h>
#include <loguru.hpp>
#include <machines/machinebase.h>
#include <cinttypes>
OHare::OHare() : PCIDevice("mac-io/ohare"), InterruptCtrl()
{
supports_types(HWCompType::MMIO_DEV | HWCompType::PCI_DEV | HWCompType::INT_CTRL);
// populate my PCI config header
this->vendor_id = PCI_VENDOR_APPLE;
this->device_id = 0x0007;
this->class_rev = 0xFF000001;
this->cache_ln_sz = 8;
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this->setup_bars({{0, 0xFFF80000UL}}); // declare 512Kb of memory-mapped I/O space
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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->awacs = std::unique_ptr<AwacsScreamer> (new AwacsScreamer());
this->snd_out_dma = std::unique_ptr<DMAChannel> (new DMAChannel("snd_out"));
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this->awacs->set_dma_out(this->snd_out_dma.get());
this->snd_out_dma->set_callbacks(
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std::bind(&AwacsScreamer::dma_out_start, this->awacs.get()),
std::bind(&AwacsScreamer::dma_out_stop, this->awacs.get())
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);
// connect serial HW
this->escc = dynamic_cast<EsccController*>(gMachineObj->get_comp_by_name("Escc"));
}
void OHare::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, "%s: deallocating I/O memory not implemented",
this->pci_name.c_str());
}
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 OHare::read(uint32_t rgn_start, uint32_t offset, int size)
{
unsigned sub_addr = (offset >> 12) & 0x7F;
switch (sub_addr) {
case 0:
return read_ctrl(offset, size);
case 8:
return dma_read(offset & 0x7FFF, size);
case 0x13: // ESCC MacRISC addressing
return this->escc->read((offset >> 4) & 0xF);
case 0x14: // AWACS
return this->awacs->snd_ctrl_read(offset & 0xFF, size);
case 0x16:
case 0x17:
return this->viacuda->read((offset >> 9) & 0xF);
case 0x20:
return 0xFF7FU;
default:
if (sub_addr >= 0x60) {
return this->nvram->read_byte((offset - 0x60000) >> 4);
} else {
LOG_F(WARNING, "OHare: read from unimplemented register 0x%X",
this->base_addr + offset);
}
}
return 0xFFFFFFFFUL;
}
void OHare::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size)
{
unsigned sub_addr = (offset >> 12) & 0x7F;
switch (sub_addr) {
case 0:
this->write_ctrl(offset, value, size);
break;
case 8:
this->dma_write(offset & 0x7FFF, value, size);
break;
case 0x13: // ESCC MacRISC addressing
this->escc->write((offset >> 4) & 0xF, value);
break;
case 0x14: // AWACS
this->awacs->snd_ctrl_write(offset & 0xFF, value, size);
break;
case 0x16:
case 0x17: // VIA-CUDA
this->viacuda->write((offset >> 9) & 0xF, value);
break;
case 0x20:
LOG_F(INFO, "OHare: write to IDE0 register at 0x%X", offset);
break;
default:
if (sub_addr >= 0x60) {
this->nvram->write_byte((offset - 0x60000) >> 4, value);
} else {
LOG_F(WARNING, "OHare: writing to unimplemented device register 0x%X",
this->base_addr + offset);
}
}
}
uint32_t OHare::read_ctrl(uint32_t offset, int size)
{
uint32_t res = 0;
switch (offset & 0xFC) {
case MIO_INT_EVENTS1:
res = this->int_events;
break;
case MIO_OHARE_ID: // HACK: no clue what this register is supposed to contain
res = 0xFFFFBFFFUL;
default:
LOG_F(WARNING, "OHare: read from unknown control register at %x", offset);
break;
}
return BYTESWAP_32(res);
}
void OHare::write_ctrl(uint32_t offset, uint32_t value, int size)
{
switch (offset) {
case MIO_INT_MASK1:
this->int_mask = BYTESWAP_32(value);
break;
case MIO_INT_CLEAR1:
if (value & MACIO_INT_CLR) {
this->int_events = 0;
this->cpu_int_latch = false;
ppc_release_int();
LOG_F(5, "OHare: CPU INT latch cleared");
} else {
this->int_events &= BYTESWAP_32(value);
}
break;
default:
LOG_F(WARNING, "OHare: writing to unimplemented control register 0x%X",
this->base_addr + offset);
}
}
uint32_t OHare::dma_read(uint32_t offset, int size)
{
switch (offset >> 8) {
case 8:
return this->snd_out_dma->reg_read(offset & 0xFF, size);
default:
LOG_F(WARNING, "OHare: unsupported DMA channel read, offset=0x%X", offset);
}
return 0xFFFFFFUL;
}
void OHare::dma_write(uint32_t offset, uint32_t value, int size)
{
switch (offset >> 8) {
case 8:
this->snd_out_dma->reg_write(offset & 0xFF, value, size);
break;
default:
LOG_F(WARNING, "OHare: unsupported DMA channel write, offset=0x%X, val=0x%X", offset, value);
}
}
uint32_t OHare::register_dev_int(IntSrc src_id)
{
return 0;
}
uint32_t OHare::register_dma_int(IntSrc src_id)
{
ABORT_F("OHare: register_dma_int() not implemented");
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return 0;
}
void OHare::ack_int(uint32_t irq_id, uint8_t irq_line_state)
{
}
void OHare::ack_dma_int(uint32_t irq_id, uint8_t irq_line_state)
{
}
static const vector<string> OHare_Subdevices = {
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"NVRAM", "ViaCuda", "ScsiMesh", "Mesh", "Escc", "Swim3"
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};
static const DeviceDescription OHare_Descriptor = {
OHare::create, OHare_Subdevices, {}
};
REGISTER_DEVICE(OHare, OHare_Descriptor);