68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
/*
|
|
DingusPPC - The Experimental PowerPC Macintosh emulator
|
|
Copyright (C) 2018-22 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/>.
|
|
*/
|
|
|
|
#ifndef OF_NVRAM_H
|
|
#define OF_NVRAM_H
|
|
|
|
#include <devices/common/nvram.h>
|
|
|
|
/** @file Utilities for working with the Apple Open Firmware NVRAM partition. */
|
|
|
|
#define OF_NVRAM_OFFSET 0x1800
|
|
#define OF_NVRAM_SIG 0x1275
|
|
|
|
// OF Variable types
|
|
enum {
|
|
OF_VAR_TYPE_INT = 1,
|
|
OF_VAR_TYPE_STR = 2,
|
|
};
|
|
|
|
typedef struct {
|
|
uint16_t sig; // partition signature (= 0x1275)
|
|
uint8_t version; // header version
|
|
uint8_t num_pages; // number of memory pages
|
|
uint16_t checksum; // partition checksum
|
|
uint16_t here; // offset to the next free byte (bottom-up)
|
|
uint16_t top; // offset to the last free byte (top-down)
|
|
} OfNvramHdr;
|
|
|
|
class OfNvramUtils {
|
|
public:
|
|
OfNvramUtils() = default;
|
|
~OfNvramUtils() = default;
|
|
|
|
int init();
|
|
void printenv();
|
|
void setenv(std::string var_name, std::string value);
|
|
|
|
protected:
|
|
bool validate();
|
|
uint16_t checksum_partition();
|
|
void update_partition();
|
|
|
|
private:
|
|
NVram* nvram_obj = nullptr;
|
|
int size = 0;
|
|
uint8_t buf[0x800];
|
|
};
|
|
|
|
#endif // OF_NVRAM_H
|