// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
#ifndef MAME_MACHINE_NAOMIGD_H
#define MAME_MACHINE_NAOMIGD_H
#pragma once
#include "machine/naomibd.h"
class naomi_gdrom_board : public naomi_board
{
public:
template <typename T, typename U>
naomi_gdrom_board(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, T &&eeprom_tag, const char *_image_tag, U &&picregion_tag)
: naomi_gdrom_board(mconfig, tag, owner, clock)
{
eeprom.set_tag(std::forward<T>(eeprom_tag));
set_image_tag(_image_tag);
picdata.set_tag(std::forward<U>(picregion_tag));
}
template <typename T>
naomi_gdrom_board(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, const char *_image_tag, T &&picregion_tag)
: naomi_gdrom_board(mconfig, tag, owner, clock)
{
picdata.set_tag(std::forward<T>(picregion_tag));
set_image_tag(_image_tag);
}
naomi_gdrom_board(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
void set_image_tag(const char *_image_tag)
{
image_tag = _image_tag;
}
uint8_t *memory(uint32_t &size) { size = dimm_data_size; return dimm_data; }
virtual const tiny_rom_entry *device_rom_region() const override;
protected:
virtual void device_start() override;
virtual void device_reset() override;
virtual void board_setup_address(uint32_t address, bool is_dma) override;
virtual void board_get_buffer(uint8_t *&base, uint32_t &limit) override;
virtual void board_advance(uint32_t size) override;
private:
enum { FILENAME_LENGTH=24 };
const char *image_tag;
optional_region_ptr<uint8_t> picdata;
uint32_t dimm_cur_address;
// Note: voluntarily not saved into the state
uint8_t *dimm_data;
uint32_t dimm_data_size;
static const uint32_t DES_LEFTSWAP[];
static const uint32_t DES_RIGHTSWAP[];
static const uint32_t DES_SBOX1[];
static const uint32_t DES_SBOX2[];
static const uint32_t DES_SBOX3[];
static const uint32_t DES_SBOX4[];
static const uint32_t DES_SBOX5[];
static const uint32_t DES_SBOX6[];
static const uint32_t DES_SBOX7[];
static const uint32_t DES_SBOX8[];
static const uint32_t DES_MASK_TABLE[];
static const uint8_t DES_ROTATE_TABLE[16];
void find_file(const char *name, const uint8_t *dir_sector, uint32_t &file_start, uint32_t &file_size);
inline void permutate(uint32_t &a, uint32_t &b, uint32_t m, int shift);
void des_generate_subkeys(const uint64_t key, uint32_t *subkeys);
uint64_t des_encrypt_decrypt(bool decrypt, uint64_t src, const uint32_t *des_subkeys);
uint64_t rev64(uint64_t src);
uint64_t read_to_qword(const uint8_t *region);
void write_from_qword(uint8_t *region, uint64_t qword);
};
DECLARE_DEVICE_TYPE(NAOMI_GDROM_BOARD, naomi_gdrom_board)
#endif // MAME_MACHINE_NAOMIGD_H