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https://github.com/dingusdev/dingusppc.git
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84a694d4c2
So that you don't see identical messages "Could not restore NVRAM content from the given file." Instead, one will mention nvram.bin and the other will mention pram.bin.
101 lines
2.8 KiB
C++
101 lines
2.8 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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#include <devices/common/hwcomponent.h>
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#include <devices/common/nvram.h>
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#include <devices/deviceregistry.h>
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#include <cinttypes>
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#include <cstring>
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#include <fstream>
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#include <loguru.hpp>
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/** @file Non-volatile RAM implementation.
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*/
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using namespace std;
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/** the signature for NVRAM backing file identification. */
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static char NVRAM_FILE_ID[] = "DINGUSPPCNVRAM";
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NVram::NVram(std::string file_name, uint32_t ram_size)
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{
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this->name = "NVRAM";
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supports_types(HWCompType::NVRAM);
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this->file_name = file_name;
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this->ram_size = ram_size;
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// allocate memory storage and fill it with zeroes
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this->storage = std::unique_ptr<uint8_t[]>(new uint8_t[ram_size] ());
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this->init();
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}
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NVram::~NVram() {
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this->save();
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}
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uint8_t NVram::read_byte(uint32_t offset) {
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return (this->storage[offset]);
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}
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void NVram::write_byte(uint32_t offset, uint8_t val) {
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this->storage[offset] = val;
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}
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void NVram::init() {
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char sig[sizeof(NVRAM_FILE_ID)];
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uint16_t data_size;
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ifstream f(this->file_name, ios::in | ios::binary);
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if (f.fail() || !f.read(sig, sizeof(NVRAM_FILE_ID)) ||
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!f.read((char*)&data_size, sizeof(data_size)) ||
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memcmp(sig, NVRAM_FILE_ID, sizeof(NVRAM_FILE_ID)) || data_size != this->ram_size ||
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!f.read((char*)this->storage.get(), this->ram_size)) {
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LOG_F(WARNING, "Could not restore NVRAM content from the given file \"%s\".", this->file_name.c_str());
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memset(this->storage.get(), 0, this->ram_size);
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}
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f.close();
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}
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void NVram::save() {
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ofstream f(this->file_name, ios::out | ios::binary);
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/* write file identification */
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f.write(NVRAM_FILE_ID, sizeof(NVRAM_FILE_ID));
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f.write((char*)&this->ram_size, sizeof(this->ram_size));
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/* write NVRAM content */
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f.write((char*)this->storage.get(), this->ram_size);
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f.close();
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}
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static const DeviceDescription Nvram_Descriptor = {
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NVram::create, {}, {}
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};
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REGISTER_DEVICE(NVRAM, Nvram_Descriptor);
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