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dingusppc/devices/ioctrl/grandcentral.cpp
Maxim Poliakovski 4d87ed9b38 Make NVRAM a full-fledged HW component.
2022-03-29 01:55:11 +02:00

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/*
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/common/scsi/sc53c94.h>
#include <devices/ethernet/mace.h>
#include <devices/ioctrl/macio.h>
#include <devices/serial/escc.h>
#include <endianswap.h>
#include <loguru.hpp>
#include <machines/machinebase.h>
#include <cinttypes>
#include <memory>
GrandCentral::GrandCentral() : PCIDevice("mac-io/grandcentral"), InterruptCtrl()
{
supports_types(HWCompType::MMIO_DEV | HWCompType::INT_CTRL);
// populate my PCI config header
this->vendor_id = PCI_VENDOR_APPLE;
this->device_id = 0x0002;
this->class_rev = 0xFF000002;
this->cache_ln_sz = 8;
this->bars_cfg[0] = 0xFFFE0000UL; // declare 128Kb of memory-mapped I/O space
this->pci_notify_bar_change = [this](int bar_num) {
this->notify_bar_change(bar_num);
};
// construct subdevices
this->mace = std::unique_ptr<MaceController> (new MaceController(MACE_ID));
this->viacuda = std::unique_ptr<ViaCuda> (new ViaCuda());
this->nvram = std::unique_ptr<NVram> (new NVram());
gMachineObj->add_subdevice("ViaCuda", this->viacuda.get());
gMachineObj->add_subdevice("NVRAM", this->nvram.get());
// 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());
this->awacs->set_dma_out(this->snd_out_dma.get());
this->snd_out_dma->set_callbacks(
std::bind(&AwacsScreamer::dma_start, this->awacs.get()),
std::bind(&AwacsScreamer::dma_end, this->awacs.get())
);
this->escc = std::unique_ptr<EsccController> (new EsccController());
this->scsi_0 = std::unique_ptr<Sc53C94> (new Sc53C94());
}
void GrandCentral::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, "GC: deallocating I/O memory not implemented");
}
this->base_addr = this->bars[0] & 0xFFFFFFF0UL;
this->host_instance->pci_register_mmio_region(this->base_addr, 0x20000, this);
LOG_F(INFO, "%s: base address set to 0x%X", this->pci_name.c_str(), this->base_addr);
}
}
uint32_t GrandCentral::read(uint32_t reg_start, uint32_t offset, int size)
{
if (offset & 0x10000) { // Device register space
unsigned subdev_num = (offset >> 12) & 0xF;
switch (subdev_num) {
case 0: // Curio SCSI
return this->scsi_0->read((offset >> 4) & 0xF);
case 1: // MACE
return this->mace->read((offset >> 4) & 0x1F);
case 2: // ESCC compatible addressing
if ((offset & 0xFF) < 16) {
return this->escc->read((offset >> 1) & 0xF);
}
// fallthrough
case 3: // ESCC MacRISC addressing
return this->escc->read((offset >> 4) & 0xF);
case 4: // AWACS
return this->awacs->snd_ctrl_read(offset & 0xFF, size);
case 6:
case 7: // VIA-CUDA
return this->viacuda->read((offset >> 9) & 0xF);
case 0xA: // Board register 1 (IOBus dev #1)
return BYTESWAP_32(0x100);
case 0xF: // NVRAM Data (IOBus dev #6)
return this->nvram->read_byte(
(this->nvram_addr_hi << 5) + ((offset >> 4) & 0x1F));
default:
LOG_F(WARNING, "GC: unimplemented subdevice %d registers", subdev_num);
}
} else if (offset & 0x8000) { // DMA register space
unsigned subdev_num = (offset >> 12) & 0xF;
switch (subdev_num) {
case 8:
return this->snd_out_dma->reg_read(offset & 0xFF, size);
default:
LOG_F(WARNING, "GC: unimplemented DMA register at 0x%X",
this->base_addr + offset);
}
} else { // Interrupt related registers
switch (offset) {
case MIO_INT_MASK1:
return BYTESWAP_32(this->int_mask);
case MIO_INT_LEVELS1:
return BYTESWAP_32(this->int_levels);
case MIO_INT_EVENTS1:
return BYTESWAP_32(this->int_events);
}
}
LOG_F(WARNING, "GC: reading from unmapped I/O memory 0x%X", this->base_addr + offset);
return 0;
}
void GrandCentral::write(uint32_t reg_start, uint32_t offset, uint32_t value, int size)
{
if (offset & 0x10000) { // Device register space
unsigned subdev_num = (offset >> 12) & 0xF;
switch (subdev_num) {
case 0: // Curio SCSI
this->scsi_0->write((offset >> 4) & 0xF, value);
break;
case 1: // MACE registers
this->mace->write((offset >> 4) & 0x1F, value);
break;
case 2: // ESCC compatible addressing
if ((offset & 0xFF) < 16) {
this->escc->write((offset >> 1) & 0xF, value);
break;
}
// fallthrough
case 3: // ESCC MacRISC addressing
this->escc->write((offset >> 4) & 0xF, value);
break;
case 4: // AWACS
this->awacs->snd_ctrl_write(offset & 0xFF, value, size);
break;
case 6:
case 7: // VIA-CUDA
this->viacuda->write((offset >> 9) & 0xF, value);
break;
case 0xD: // NVRAM High Address (IOBus dev #4)
switch (size) {
case 4:
this->nvram_addr_hi = BYTESWAP_32(value);
break;
case 2:
this->nvram_addr_hi = BYTESWAP_16(value);
break;
default:
this->nvram_addr_hi = value;
}
break;
case 0xF: // NVRAM Data (IOBus dev #6)
this->nvram->write_byte(
(this->nvram_addr_hi << 5) + ((offset >> 4) & 0x1F), value);
break;
default:
LOG_F(WARNING, "GC: unimplemented subdevice %d registers", subdev_num);
}
} else if (offset & 0x8000) { // DMA register space
unsigned subdev_num = (offset >> 12) & 0xF;
switch (subdev_num) {
case 8:
this->snd_out_dma->reg_write(offset & 0xFF, value, size);
break;
default:
LOG_F(WARNING, "GC: unimplemented DMA register at 0x%X",
this->base_addr + offset);
}
} else { // Interrupt related registers
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;
} else {
this->int_events &= BYTESWAP_32(value);
}
break;
default:
LOG_F(WARNING, "GC: writing to unmapped I/O memory 0x%X",
this->base_addr + offset);
}
}
}
uint32_t GrandCentral::register_dev_int(IntSrc src_id)
{
switch (src_id) {
case IntSrc::VIA_CUDA:
return 1 << 18;
case IntSrc::SCSI1:
return 1 << 12;
case IntSrc::SWIM3:
return 1 << 19;
default:
ABORT_F("GC: unknown interrupt source %d", src_id);
}
return 0;
}
uint32_t GrandCentral::register_dma_int(IntSrc src_id)
{
ABORT_F("GC: register_dma_int() not implemened");
return 0;
}
void GrandCentral::ack_int(uint32_t irq_id, uint8_t irq_line_state)
{
if (this->int_mask & MACIO_INT_MODE) { // 68k interrupt emulation mode?
this->int_events |= irq_id; // signal IRQ line change
this->int_events &= this->int_mask;
// update IRQ line state
if (irq_line_state) {
this->int_levels |= irq_id;
} else {
this->int_levels &= ~irq_id;
}
// signal CPU interrupt
if (this->int_events) {
ppc_ext_int();
}
} else {
ABORT_F("GC: native interrupt mode not implemented");
}
}
void GrandCentral::ack_dma_int(uint32_t irq_id, uint8_t irq_line_state)
{
ABORT_F("GC: ack_dma_int() not implemened");
}
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