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dingusppc/devices/memctrl/memctrlbase.cpp
joevt 9a26016ed4 memctrlbase: Clear RAM to zero.
2024-03-08 20:58:41 -07:00

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/*
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 <devices/common/mmiodevice.h>
#include <algorithm> // to shut up MSVC errors (:
#include <cstring>
#include <string>
#include <vector>
#include <loguru.hpp>
static inline bool match_mem_entry(const AddressMapEntry* entry,
const uint32_t start, const uint32_t end,
MMIODevice* dev_instance)
{
return start == entry->start && end == entry->end &&
(!dev_instance || dev_instance == entry->devobj);
}
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;
}
AddressMapEntry* MemCtrlBase::find_range_exact(uint32_t addr, uint32_t size,
MMIODevice* dev_instance)
{
if (size) {
const uint32_t end = addr + size - 1;
for (auto& entry : address_map) {
if (match_mem_entry(entry, addr, end, dev_instance))
return entry;
}
}
return nullptr;
}
AddressMapEntry* MemCtrlBase::find_range_contains(uint32_t addr, uint32_t size) {
if (size) {
uint32_t end = addr + size - 1;
for (auto& entry : address_map) {
if (addr >= entry->start && end <= entry->end)
return entry;
}
}
return nullptr;
}
AddressMapEntry* MemCtrlBase::find_range_overlaps(uint32_t addr, uint32_t size) {
if (size) {
uint32_t end = addr + size - 1;
for (auto& entry : address_map) {
if (end >= entry->start && addr <= entry->end)
return entry;
}
}
return nullptr;
}
bool MemCtrlBase::is_range_free(uint32_t addr, uint32_t size) {
bool result = true;
if (size) {
uint32_t end = addr + size - 1;
for (auto& entry : address_map) {
if (addr == entry->start && end == entry->end) {
LOG_F(WARNING, "memory region 0x%X..0x%X%s%s%s already exists",
addr, end,
entry->devobj ? " (" : "",
entry->devobj ? entry->devobj->get_name().c_str() : "",
entry->devobj ? ")"
: ""
);
result = false;
}
else if (addr >= entry->start && end <= entry->end) {
LOG_F(WARNING, "0x%X..0x%X already exists in memory region 0x%X..0x%X%s%s%s",
addr, end, entry->start, entry->end,
entry->devobj ? " (" : "",
entry->devobj ? entry->devobj->get_name().c_str() : "",
entry->devobj ? ")"
: ""
);
result = false;
}
else if (end >= entry->start && addr <= entry->end) {
LOG_F(ERROR, "0x%X..0x%X overlaps existing memory region 0x%X..0x%X%s%s%s",
addr, end, entry->start, entry->end,
entry->devobj ? " (" : "",
entry->devobj ? entry->devobj->get_name().c_str() : "",
entry->devobj ? ")"
: ""
);
result = false;
}
}
}
return result;
}
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 (!is_range_free(start_addr, size))
return false;
uint8_t* reg_content = new uint8_t[size](); /* () intializer clears the memory to zero */
this->mem_regions.push_back(reg_content);
entry = new AddressMapEntry;
uint32_t end = start_addr + size - 1;
entry->start = start_addr;
entry->end = end;
entry->mirror = dest_addr;
entry->type = type;
entry->devobj = 0;
entry->mem_ptr = reg_content;
this->address_map.push_back(entry);
LOG_F(INFO, "Added mem region 0x%X..0x%X (%s%s%s%s) -> 0x%X", start_addr, end,
entry->type & RT_ROM ? "ROM," : "",
entry->type & RT_RAM ? "RAM," : "",
entry->type & RT_MMIO ? "MMIO," : "",
entry->type & RT_MIRROR ? "MIRROR," : "",
dest_addr
);
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;
uint32_t end = start_addr + (ref_entry->end - ref_entry->start);
entry->start = start_addr;
entry->end = end;
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);
LOG_F(INFO, "Added mem region mirror 0x%X..0x%X (%s%s%s%s) -> 0x%X : 0x%X..0x%X%s%s%s",
start_addr, end,
entry->type & RT_ROM ? "ROM," : "",
entry->type & RT_RAM ? "RAM," : "",
entry->type & RT_MMIO ? "MMIO," : "",
entry->type & RT_MIRROR ? "MIRROR," : "",
dest_addr,
ref_entry->start, ref_entry->end,
ref_entry->devobj ? " (" : "",
ref_entry->devobj ? ref_entry->devobj->get_name().c_str() : "",
ref_entry->devobj ? ")"
: ""
);
return true;
}
bool MemCtrlBase::set_data(uint32_t load_addr, const uint8_t* data, uint32_t size) {
AddressMapEntry* ref_entry;
uint32_t cpy_size;
ref_entry = find_range(load_addr);
if (!ref_entry)
return false;
uint32_t load_offset = load_addr - ref_entry->start;
cpy_size = std::min(ref_entry->end - ref_entry->start + 1, size);
memcpy(ref_entry->mem_ptr + load_offset, data, cpy_size);
return true;
}
bool MemCtrlBase::add_mmio_region(uint32_t start_addr, uint32_t size, MMIODevice* dev_instance)
{
AddressMapEntry *entry;
/* error if a memory region for the given range already exists */
if (!is_range_free(start_addr, size))
return false;
entry = new AddressMapEntry;
uint32_t end = start_addr + size - 1;
entry->start = start_addr;
entry->end = end;
entry->mirror = 0;
entry->type = RT_MMIO;
entry->devobj = dev_instance;
entry->mem_ptr = 0;
this->address_map.push_back(entry);
LOG_F(INFO, "Added mmio region 0x%X..0x%X%s%s%s",
start_addr, end,
dev_instance ? " (" : "",
dev_instance ? dev_instance->get_name().c_str() : "",
dev_instance ? ")"
: ""
);
return true;
}
bool MemCtrlBase::remove_mmio_region(uint32_t start_addr, uint32_t size, MMIODevice* dev_instance)
{
int found = 0;
uint32_t end = start_addr + size - 1;
address_map.erase(std::remove_if(address_map.begin(), address_map.end(),
[start_addr, end, dev_instance, &found](const AddressMapEntry *entry) {
bool result = match_mem_entry(entry, start_addr, end, dev_instance);
found += result;
return result;
}
), address_map.end());
if (found == 0)
LOG_F(ERROR, "Cannot find mmio region 0x%X..0x%X%s%s%s to remove",
start_addr, end,
dev_instance ? " (" : "",
dev_instance ? dev_instance->get_name().c_str() : "",
dev_instance ? ")"
: ""
);
else if (found > 1)
LOG_F(ERROR, "Removed %d occurrences of mmio region 0x%X..0x%X%s%s%s",
found, start_addr, end,
dev_instance ? " (" : "",
dev_instance ? dev_instance->get_name().c_str() : "",
dev_instance ? ")"
: ""
);
else
LOG_F(INFO, "Removed mmio region 0x%X..0x%X%s%s%s",
start_addr, end,
dev_instance ? " (" : "",
dev_instance ? dev_instance->get_name().c_str() : "",
dev_instance ? ")"
: ""
);
return (found > 0);
}
AddressMapEntry* MemCtrlBase::find_rom_region()
{
for (auto& entry : address_map) {
if (entry->type == RT_ROM) {
return entry;
}
}
return nullptr;
}
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