mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-11-18 22:05:51 +00:00
138 lines
3.6 KiB
C++
138 lines
3.6 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-20 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 <algorithm> // to shut up MSVC errors (:
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#include <cstring>
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#include <string>
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#include <vector>
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#include "memctrlbase.h"
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MemCtrlBase::~MemCtrlBase() {
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for (auto& reg : mem_regions) {
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if (reg)
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delete (reg);
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}
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this->mem_regions.clear();
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this->address_map.clear();
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}
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AddressMapEntry* MemCtrlBase::find_range(uint32_t addr) {
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for (auto& entry : address_map) {
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if (addr >= entry.start && addr <= entry.end)
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return &entry;
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}
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return 0;
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}
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bool MemCtrlBase::add_mem_region(
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uint32_t start_addr, uint32_t size, uint32_t dest_addr, uint32_t type, uint8_t init_val = 0) {
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AddressMapEntry entry;
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/* error if a memory region for the given range already exists */
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if (find_range(start_addr) || find_range(start_addr + size))
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return false;
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uint8_t* reg_content = new uint8_t[size];
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this->mem_regions.push_back(reg_content);
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entry.start = start_addr;
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entry.end = start_addr + size - 1;
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entry.mirror = dest_addr;
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entry.type = type;
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entry.devobj = 0;
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entry.mem_ptr = reg_content;
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this->address_map.push_back(entry);
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return true;
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}
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bool MemCtrlBase::add_rom_region(uint32_t start_addr, uint32_t size) {
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return add_mem_region(start_addr, size, 0, RT_ROM);
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}
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bool MemCtrlBase::add_ram_region(uint32_t start_addr, uint32_t size) {
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return add_mem_region(start_addr, size, 0, RT_RAM);
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}
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bool MemCtrlBase::add_mem_mirror(uint32_t start_addr, uint32_t dest_addr) {
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AddressMapEntry entry, *ref_entry;
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ref_entry = find_range(dest_addr);
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if (!ref_entry)
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return false;
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entry.start = start_addr;
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entry.end = start_addr + (ref_entry->end - ref_entry->start) + 1;
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entry.mirror = dest_addr;
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entry.type = ref_entry->type | RT_MIRROR;
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entry.devobj = 0;
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entry.mem_ptr = ref_entry->mem_ptr;
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this->address_map.push_back(entry);
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return true;
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}
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bool MemCtrlBase::set_data(uint32_t reg_addr, const uint8_t* data, uint32_t size) {
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AddressMapEntry* ref_entry;
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uint32_t cpy_size;
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ref_entry = find_range(reg_addr);
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if (!ref_entry)
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return false;
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cpy_size = std::min(ref_entry->end - ref_entry->start + 1, size);
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memcpy(ref_entry->mem_ptr, data, cpy_size);
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return true;
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}
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bool MemCtrlBase::add_mmio_region(uint32_t start_addr, uint32_t size, MMIODevice* dev_instance) {
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AddressMapEntry entry;
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/* error if another region for the given range already exists */
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if (find_range(start_addr) || find_range(start_addr + size))
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return false;
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entry.start = start_addr;
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entry.end = start_addr + size - 1;
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entry.mirror = 0;
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entry.type = RT_MMIO;
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entry.devobj = dev_instance;
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entry.mem_ptr = 0;
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this->address_map.push_back(entry);
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return true;
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}
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