dingusppc/devices/memctrl/memctrlbase.cpp
2021-10-23 21:00:31 +02:00

160 lines
4.0 KiB
C++

/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-21 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 <devices/memctrl/memctrlbase.h>
#include <algorithm> // to shut up MSVC errors (:
#include <cstring>
#include <string>
#include <vector>
MemCtrlBase::~MemCtrlBase() {
for (auto& entry : address_map) {
if (entry)
delete(entry);
}
for (auto& reg : mem_regions) {
if (reg)
delete (reg);
}
this->mem_regions.clear();
this->address_map.clear();
}
AddressMapEntry* MemCtrlBase::find_range(uint32_t addr) {
for (auto& entry : address_map) {
if (addr >= entry->start && addr <= entry->end)
return entry;
}
return nullptr;
}
bool MemCtrlBase::add_mem_region(
uint32_t start_addr, uint32_t size, uint32_t dest_addr, uint32_t type, uint8_t init_val = 0) {
AddressMapEntry *entry;
/* error if a memory region for the given range already exists */
if (find_range(start_addr) || find_range(start_addr + size))
return false;
uint8_t* reg_content = new uint8_t[size];
this->mem_regions.push_back(reg_content);
entry = new AddressMapEntry;
entry->start = start_addr;
entry->end = start_addr + size - 1;
entry->mirror = dest_addr;
entry->type = type;
entry->devobj = 0;
entry->mem_ptr = reg_content;
this->address_map.push_back(entry);
return true;
}
bool MemCtrlBase::add_rom_region(uint32_t start_addr, uint32_t size) {
return add_mem_region(start_addr, size, 0, RT_ROM);
}
bool MemCtrlBase::add_ram_region(uint32_t start_addr, uint32_t size) {
return add_mem_region(start_addr, size, 0, RT_RAM);
}
bool MemCtrlBase::add_mem_mirror(uint32_t start_addr, uint32_t dest_addr) {
AddressMapEntry *entry, *ref_entry;
ref_entry = find_range(dest_addr);
if (!ref_entry)
return false;
entry = new AddressMapEntry;
entry->start = start_addr;
entry->end = start_addr + (ref_entry->end - ref_entry->start);
entry->mirror = dest_addr;
entry->type = ref_entry->type | RT_MIRROR;
entry->devobj = 0;
entry->mem_ptr = ref_entry->mem_ptr;
this->address_map.push_back(entry);
return true;
}
bool MemCtrlBase::set_data(uint32_t reg_addr, const uint8_t* data, uint32_t size) {
AddressMapEntry* ref_entry;
uint32_t cpy_size;
ref_entry = find_range(reg_addr);
if (!ref_entry)
return false;
cpy_size = std::min(ref_entry->end - ref_entry->start + 1, size);
memcpy(ref_entry->mem_ptr, data, cpy_size);
return true;
}
bool MemCtrlBase::add_mmio_region(uint32_t start_addr, uint32_t size, MMIODevice* dev_instance) {
AddressMapEntry *entry;
/* error if another region for the given range already exists */
if (find_range(start_addr) || find_range(start_addr + size - 1))
return false;
entry = new AddressMapEntry;
entry->start = start_addr;
entry->end = start_addr + size - 1;
entry->mirror = 0;
entry->type = RT_MMIO;
entry->devobj = dev_instance;
entry->mem_ptr = 0;
this->address_map.push_back(entry);
return true;
}
AddressMapEntry* MemCtrlBase::find_rom_region()
{
for (auto& entry : address_map) {
if (entry->type == RT_ROM) {
return entry;
}
}
return nullptr;
}