mirror of
https://github.com/dingusdev/dingusppc.git
synced 2025-01-06 16:31:45 +00:00
120 lines
3.8 KiB
C++
120 lines
3.8 KiB
C++
/*
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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
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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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/** @file Media Access Controller for Ethernet (MACE) emulation. */
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#include <devices/deviceregistry.h>
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#include <devices/ethernet/mace.h>
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#include <loguru.hpp>
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#include <cinttypes>
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using namespace MaceEnet;
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uint8_t MaceController::read(uint8_t reg_offset)
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{
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switch(reg_offset) {
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case MaceReg::Rcv_Frame_Ctrl:
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return this->rcv_fc;
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case MaceReg::Interrupt: {
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uint8_t ret_val = this->int_stat;
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this->int_stat = 0;
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LOG_F(9, "%s: all interrupt flags cleared", this->name.c_str());
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return ret_val;
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}
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case MaceReg::Interrupt_Mask:
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return this->int_mask;
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case MaceReg::BIU_Config_Ctrl:
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return this->biu_ctrl;
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case MaceReg::Chip_ID_Lo:
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return this->chip_id & 0xFFU;
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case MaceReg::Chip_ID_Hi:
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return (this->chip_id >> 8) & 0xFFU;
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default:
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LOG_F(INFO, "%s: reading from register %d", this->name.c_str(), reg_offset);
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}
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return 0;
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}
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void MaceController::write(uint8_t reg_offset, uint8_t value)
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{
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switch(reg_offset) {
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case MaceReg::Rcv_Frame_Ctrl:
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this->rcv_fc = value;
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break;
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case MaceReg::Interrupt_Mask:
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this->int_mask = value;
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break;
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case MaceReg::MAC_Config_Ctrl:
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this->mac_cfg = value;
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break;
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case MaceReg::BIU_Config_Ctrl:
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if (value & BIU_SWRST) {
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LOG_F(INFO, "%s: soft reset asserted", this->name.c_str());
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value &= ~BIU_SWRST; // acknowledge soft reset
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}
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this->biu_ctrl = value;
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break;
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case MaceReg::PLS_Config_Ctrl:
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if (value != 7)
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LOG_F(WARNING, "%s: unsupported transceiver interface 0x%X in PLSCC",
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this->name.c_str(), value);
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break;
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case MaceReg::Int_Addr_Config:
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if ((value & IAC_LOGADDR) && (value & IAC_PHYADDR))
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value &= ~IAC_PHYADDR;
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if (value & (IAC_LOGADDR | IAC_PHYADDR))
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this->addr_ptr = 0;
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this->addr_cfg = value;
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break;
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case MaceReg::Log_Addr_Flt:
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if (this->addr_cfg & IAC_LOGADDR) {
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uint64_t mask = ~(0xFFULL << (this->addr_ptr * 8));
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this->log_addr = (this->log_addr & mask) | ((uint64_t)value << (this->addr_ptr * 8));
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if (++this->addr_ptr >= 8) {
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this->addr_cfg &= ~IAC_LOGADDR;
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this->addr_ptr = 0;
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}
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}
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break;
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case MaceReg::Phys_Addr:
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if (this->addr_cfg & IAC_PHYADDR) {
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uint64_t mask = ~(0xFFULL << (this->addr_ptr * 8));
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this->phys_addr = (this->phys_addr & mask) | ((uint64_t)value << (this->addr_ptr * 8));
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if (++this->addr_ptr >= 6) {
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this->addr_cfg &= ~IAC_PHYADDR;
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this->addr_ptr = 0;
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}
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}
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break;
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default:
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LOG_F(INFO, "%s: writing 0x%X to register %d", this->name.c_str(),
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value, reg_offset);
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}
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}
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static const DeviceDescription Mace_Descriptor = {
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MaceController::create, {}, {}
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};
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REGISTER_DEVICE(Mace, Mace_Descriptor);
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