mirror of
https://github.com/dingusdev/dingusppc.git
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35c86ad6bf
Result of running IWYU (https://include-what-you-use.org/) and applying most of the suggestions about unncessary includes and forward declarations. Was motivated by observing that <thread> was being included in ppcopcodes.cpp even though it was unused (found while researching the use of threads), but seems generally good to help with build times and correctness.
318 lines
10 KiB
C++
318 lines
10 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <devices/common/pci/pcidevice.h>
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#include <loguru.hpp>
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#include <cinttypes>
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#include <fstream>
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#include <cstring>
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#include <string>
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PCIDevice::PCIDevice(std::string name)
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{
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this->name = name;
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this->pci_name = name;
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this->pci_rd_stat = [this]() { return this->status; };
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this->pci_rd_cmd = [this]() { return this->command; };
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this->pci_rd_bist = []() { return 0; };
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this->pci_rd_lat_timer = [this]() { return this->lat_timer; };
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this->pci_rd_cache_lnsz = [this]() { return this->cache_ln_sz; };
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this->pci_wr_stat = [](uint16_t val) {};
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this->pci_wr_cmd = [this](uint16_t cmd) { this->command = cmd; };
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this->pci_wr_bist = [](uint8_t val) {};
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this->pci_wr_lat_timer = [this](uint8_t val) { this->lat_timer = val; };
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this->pci_wr_cache_lnsz = [this](uint8_t val) { this->cache_ln_sz = val; };
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this->pci_notify_bar_change = [](int bar_num) {};
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};
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uint32_t PCIDevice::pci_cfg_read(uint32_t reg_offs, AccessDetails &details)
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{
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switch (reg_offs) {
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case PCI_CFG_DEV_ID:
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return (this->device_id << 16) | (this->vendor_id);
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case PCI_CFG_STAT_CMD:
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return (this->pci_rd_stat() << 16) | (this->pci_rd_cmd());
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case PCI_CFG_CLASS_REV:
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return this->class_rev;
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case PCI_CFG_DWORD_3:
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return (pci_rd_bist() << 24) | (this->hdr_type << 16) |
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(pci_rd_lat_timer() << 8) | pci_rd_cache_lnsz();
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case PCI_CFG_BAR0:
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case PCI_CFG_BAR1:
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case PCI_CFG_BAR2:
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case PCI_CFG_BAR3:
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case PCI_CFG_BAR4:
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case PCI_CFG_BAR5:
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return this->bars[(reg_offs - 0x10) >> 2];
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case PCI_CFG_SUBSYS_ID:
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return (this->subsys_id << 16) | (this->subsys_vndr);
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case PCI_CFG_ROM_BAR:
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return this->exp_rom_bar;
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case PCI_CFG_DWORD_15:
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return (max_lat << 24) | (min_gnt << 16) | (irq_pin << 8) | irq_line;
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case PCI_CFG_CAP_PTR:
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return cap_ptr;
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}
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LOG_READ_UNIMPLEMENTED_CONFIG_REGISTER();
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return 0;
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}
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void PCIDevice::pci_cfg_write(uint32_t reg_offs, uint32_t value, AccessDetails &details)
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{
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switch (reg_offs) {
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case PCI_CFG_STAT_CMD:
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this->pci_wr_stat(value >> 16);
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this->pci_wr_cmd(value & 0xFFFFU);
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break;
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case PCI_CFG_DWORD_3:
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this->pci_wr_bist(value >> 24);
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this->pci_wr_lat_timer((value >> 8) & 0xFF);
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this->pci_wr_cache_lnsz(value & 0xFF);
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break;
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case PCI_CFG_BAR0:
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case PCI_CFG_BAR1:
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case PCI_CFG_BAR2:
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case PCI_CFG_BAR3:
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case PCI_CFG_BAR4:
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case PCI_CFG_BAR5:
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this->set_bar_value((reg_offs - 0x10) >> 2, value);
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break;
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case PCI_CFG_ROM_BAR:
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this->pci_wr_exp_rom_bar(value);
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break;
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case PCI_CFG_DWORD_15:
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this->irq_line = value >> 24;
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break;
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default:
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LOG_WRITE_UNIMPLEMENTED_CONFIG_REGISTER();
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}
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}
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void PCIDevice::setup_bars(std::vector<BarConfig> cfg_data)
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{
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for (auto cfg_entry : cfg_data) {
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if (cfg_entry.bar_num > 5) {
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ABORT_F("BAR number %d out of range", cfg_entry.bar_num);
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}
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this->bars_cfg[cfg_entry.bar_num] = cfg_entry.bar_cfg;
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}
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this->finish_config_bars();
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}
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int PCIDevice::attach_exp_rom_image(const std::string img_path)
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{
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std::ifstream img_file;
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int result = 0;
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this->exp_bar_cfg = 0; // tell the world we got no ROM for now
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try {
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img_file.open(img_path, std::ios::in | std::ios::binary);
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if (img_file.fail()) {
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throw std::runtime_error("could not open specified ROM dump image");
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}
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// validate image file
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uint8_t buf[4] = { 0 };
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img_file.seekg(0, std::ios::beg);
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img_file.read((char *)buf, sizeof(buf));
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if (buf[0] != 0x55 || buf[1] != 0xAA) {
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throw std::runtime_error("invalid expansion ROM signature");
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}
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// determine image size
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img_file.seekg(0, std::ios::end);
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size_t exp_rom_image_size = img_file.tellg();
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if (exp_rom_image_size > 4*1024*1024) {
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throw std::runtime_error("expansion ROM file too large");
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}
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// verify PCI struct offset
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uint16_t pci_struct_offset = 0;
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img_file.seekg(0x18, std::ios::beg);
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img_file.read((char *)&pci_struct_offset, sizeof(pci_struct_offset));
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if (pci_struct_offset > exp_rom_image_size) {
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throw std::runtime_error("invalid PCI structure offset");
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}
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// verify PCI struct signature
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img_file.seekg(pci_struct_offset, std::ios::beg);
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img_file.read((char *)buf, sizeof(buf));
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if (buf[0] != 'P' || buf[1] != 'C' || buf[2] != 'I' || buf[3] != 'R') {
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throw std::runtime_error("unexpected PCI struct signature");
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}
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// find minimum rom size for the rom file (power of 2 >= 0x800)
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for (this->exp_rom_size = 1 << 11; this->exp_rom_size < exp_rom_image_size; this->exp_rom_size <<= 1) {}
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// ROM image ok - go ahead and load it
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this->exp_rom_data = std::unique_ptr<uint8_t[]> (new uint8_t[this->exp_rom_size]);
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img_file.seekg(0, std::ios::beg);
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img_file.read((char *)this->exp_rom_data.get(), exp_rom_image_size);
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memset(&this->exp_rom_data[exp_rom_image_size], 0xff, this->exp_rom_size - exp_rom_image_size);
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if (exp_rom_image_size == this->exp_rom_size) {
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LOG_F(INFO, "%s: loaded expansion rom (%d bytes).",
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this->pci_name.c_str(), this->exp_rom_size);
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}
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else {
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LOG_F(WARNING, "%s: loaded expansion rom (%d bytes adjusted to %d bytes).",
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this->pci_name.c_str(), (int)exp_rom_image_size, this->exp_rom_size);
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}
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this->exp_bar_cfg = ~(this->exp_rom_size - 1);
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}
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catch (const std::exception& exc) {
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LOG_F(ERROR, "PCIDevice: %s", exc.what());
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result = -1;
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}
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img_file.close();
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return result;
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}
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void PCIDevice::set_bar_value(int bar_num, uint32_t value)
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{
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uint32_t bar_cfg = this->bars_cfg[bar_num];
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switch (bars_typ[bar_num]) {
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case PCIBarType::Unused:
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return;
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case PCIBarType::Io_16_Bit:
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case PCIBarType::Io_32_Bit:
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this->bars[bar_num] = (value & bar_cfg & ~3) | (bar_cfg & 3);
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break;
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case PCIBarType::Mem_20_Bit:
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case PCIBarType::Mem_32_Bit:
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case PCIBarType::Mem_64_Bit_Lo:
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this->bars[bar_num] = (value & bar_cfg & ~0xF) | (bar_cfg & 0xF);
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break;
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case PCIBarType::Mem_64_Bit_Hi:
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this->bars[bar_num] = value & bar_cfg;
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break;
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}
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if (value != 0xFFFFFFFFUL) // don't notify the device during BAR sizing
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this->pci_notify_bar_change(bar_num);
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}
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void PCIDevice::finish_config_bars()
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{
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for (int bar_num = 0; bar_num < this->num_bars; bar_num++) {
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uint32_t bar_cfg = this->bars_cfg[bar_num];
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if (!bar_cfg) // skip unimplemented BARs
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continue;
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if (bar_cfg & 1) {
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bars_typ[bar_num] = (bar_cfg & 0xffff0000) ? PCIBarType::Io_32_Bit :
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PCIBarType::Io_16_Bit;
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has_io_space = true;
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}
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else {
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int pci_space_type = (bar_cfg >> 1) & 3;
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switch (pci_space_type) {
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case 0:
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bars_typ[bar_num] = PCIBarType::Mem_32_Bit;
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break;
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case 1:
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bars_typ[bar_num] = PCIBarType::Mem_20_Bit;
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break;
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case 2:
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if (bar_num >= num_bars - 1) {
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ABORT_F("%s: BAR %d cannot be 64-bit",
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this->pci_name.c_str(), bar_num);
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}
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else if (this->bars_cfg[bar_num+1] == 0) {
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ABORT_F("%s: 64-bit BAR %d has zero for upper 32 bits",
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this->pci_name.c_str(), bar_num);
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}
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else {
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bars_typ[bar_num++] = PCIBarType::Mem_64_Bit_Lo;
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bars_typ[bar_num ] = PCIBarType::Mem_64_Bit_Hi;
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}
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break;
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default:
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ABORT_F("%s: invalid or unsupported PCI space type %d for BAR %d",
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this->pci_name.c_str(), pci_space_type, bar_num);
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} // switch pci_space_type
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}
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} // for bar_num
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}
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void PCIDevice::map_exp_rom_mem()
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{
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uint32_t rom_addr = this->exp_rom_bar & this->exp_bar_cfg;
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if (rom_addr) {
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if (this->exp_rom_addr != rom_addr) {
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this->unmap_exp_rom_mem();
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uint32_t rom_size = ~this->exp_bar_cfg + 1;
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this->host_instance->pci_register_mmio_region(rom_addr, rom_size, this);
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this->exp_rom_addr = rom_addr;
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}
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}
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else {
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this->unmap_exp_rom_mem();
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}
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}
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void PCIDevice::unmap_exp_rom_mem()
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{
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if (this->exp_rom_addr) {
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uint32_t rom_size = ~this->exp_bar_cfg + 1;
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this->host_instance->pci_unregister_mmio_region(exp_rom_addr, rom_size, this);
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this->exp_rom_addr = 0;
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}
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}
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void PCIDevice::pci_wr_exp_rom_bar(uint32_t data)
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{
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if (!this->exp_bar_cfg) {
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return;
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}
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if ((data & this->exp_bar_cfg) == this->exp_bar_cfg) {
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// doing sizing
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this->exp_rom_bar = (data & (this->exp_bar_cfg | 1));
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} else {
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this->exp_rom_bar = (data & (this->exp_bar_cfg | 1));
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if (this->exp_rom_bar & 1) {
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this->map_exp_rom_mem();
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}
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else {
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this->unmap_exp_rom_mem();
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}
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}
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}
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