// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** dimemory.c Device memory interfaces. ***************************************************************************/ #include "emu.h" //************************************************************************** // CONSTANTS //************************************************************************** //const int TRIGGER_SUSPENDTIME = -4000; //************************************************************************** // ADDRESS SPACE CONFIG //************************************************************************** //------------------------------------------------- // address_space_config - constructors //------------------------------------------------- address_space_config::address_space_config() : m_name("unknown"), m_endianness(ENDIANNESS_NATIVE), m_data_width(0), m_addr_width(0), m_addr_shift(0), m_logaddr_width(0), m_page_shift(0), m_is_octal(false), m_internal_map(address_map_constructor()), m_default_map(address_map_constructor()) { } /*! @param name @param endian CPU endianness @param datawidth CPU parallelism bits @param addrwidth address bits @param addrshift @param internal @param defmap */ address_space_config::address_space_config(const char *name, endianness_t endian, u8 datawidth, u8 addrwidth, s8 addrshift, address_map_constructor internal, address_map_constructor defmap) : m_name(name), m_endianness(endian), m_data_width(datawidth), m_addr_width(addrwidth), m_addr_shift(addrshift), m_logaddr_width(addrwidth), m_page_shift(0), m_is_octal(false), m_internal_map(internal), m_default_map(defmap) { } address_space_config::address_space_config(const char *name, endianness_t endian, u8 datawidth, u8 addrwidth, s8 addrshift, u8 logwidth, u8 pageshift, address_map_constructor internal, address_map_constructor defmap) : m_name(name), m_endianness(endian), m_data_width(datawidth), m_addr_width(addrwidth), m_addr_shift(addrshift), m_logaddr_width(logwidth), m_page_shift(pageshift), m_is_octal(false), m_internal_map(internal), m_default_map(defmap) { } //************************************************************************** // MEMORY DEVICE MANAGEMENT //************************************************************************** //------------------------------------------------- // device_memory_interface - constructor //------------------------------------------------- device_memory_interface::device_memory_interface(const machine_config &mconfig, device_t &device) : device_interface(device, "memory") { // configure the fast accessor device.interfaces().m_memory = this; } //------------------------------------------------- // ~device_memory_interface - destructor //------------------------------------------------- device_memory_interface::~device_memory_interface() { } //------------------------------------------------- // set_addrmap - connect an address map to a device //------------------------------------------------- void device_memory_interface::set_addrmap(int spacenum, address_map_constructor map) { if (spacenum >= int(m_address_map.size())) m_address_map.resize(spacenum+1); m_address_map[spacenum] = map; } //------------------------------------------------- // memory_translate - translate from logical to // phyiscal addresses; designed to be overridden // by the actual device implementation if address // translation is supported //------------------------------------------------- bool device_memory_interface::memory_translate(int spacenum, int intention, offs_t &address) { // by default it maps directly return true; } //------------------------------------------------- // interface_config_complete - perform final // memory configuration setup //------------------------------------------------- void device_memory_interface::interface_config_complete() { const space_config_vector r = memory_space_config(); for (const auto &entry : r) { if (entry.first >= int(m_address_config.size())) m_address_config.resize(entry.first + 1); m_address_config[entry.first] = entry.second; } } //------------------------------------------------- // interface_validity_check - perform validity // checks on the memory configuration //------------------------------------------------- void device_memory_interface::interface_validity_check(validity_checker &valid) const { // loop over all address spaces for (int spacenum = 0; spacenum < int(m_address_config.size()); ++spacenum) { if (space_config(spacenum)) { // construct the map ::address_map addrmap(const_cast(device()), spacenum); // let the map check itself addrmap.map_validity_check(valid, spacenum); } } }