94 lines
2.7 KiB
C++
94 lines
2.7 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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/** DEC 21154 PCI-to-PCI bridge emulation. */
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#include <devices/common/hwcomponent.h>
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#include <devices/common/pci/dec21154.h>
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#include <devices/deviceregistry.h>
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#include <loguru.hpp>
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#include <cinttypes>
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DecPciBridge::DecPciBridge(std::string name) : PCIBridge(name)
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{
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supports_types(HWCompType::PCI_HOST | HWCompType::PCI_DEV);
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// initialize PCI config header
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this->vendor_id = PCI_VENDOR_DEC;
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this->device_id = 0x0026;
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this->class_rev = 0x06040002;
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this->cache_ln_sz = 0;
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this->command = 0;
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this->status = 0x2B0;
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}
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uint32_t DecPciBridge::pci_cfg_read(uint32_t reg_offs, AccessDetails &details)
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{
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if (reg_offs < 64) {
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return PCIBridge::pci_cfg_read(reg_offs, details);
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}
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switch (reg_offs) {
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case CHIP_CTRL:
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return (this->arb_ctrl << 16) | (this-> diag_ctrl << 8) | this->chip_ctrl;
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case PSERR_EVENT_DIS:
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return (this->gpio_out_en << 16) | this->pserr_event_dis;
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case SEC_CLK_CTRL:
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return this->sec_clock_ctrl;
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default:
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LOG_READ_UNIMPLEMENTED_CONFIG_REGISTER();
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}
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return 0;
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}
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void DecPciBridge::pci_cfg_write(uint32_t reg_offs, uint32_t value, AccessDetails &details)
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{
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if (reg_offs < 64) {
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PCIBridge::pci_cfg_write(reg_offs, value, details);
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return;
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}
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switch (reg_offs) {
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case CHIP_CTRL:
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this->chip_ctrl = value & 0xFFU;
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this->diag_ctrl = (value >> 8) & 0xFFU;
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this->arb_ctrl = value >> 16;
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break;
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case PSERR_EVENT_DIS:
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this->pserr_event_dis = value & 0xFFU;
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this->gpio_out_en = (value >> 16) & 0xFFU;
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break;
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case SEC_CLK_CTRL:
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this->sec_clock_ctrl = value & 0xFFFFU;
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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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static const DeviceDescription Dec21154_Descriptor = {
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DecPciBridge::create, {}, {}
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};
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REGISTER_DEVICE(Dec21154, Dec21154_Descriptor);
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