// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** dimemory.c Device memory interfaces. ***************************************************************************/ #include "emu.h" //************************************************************************** // CONSTANTS //************************************************************************** //const int TRIGGER_SUSPENDTIME = -4000; //************************************************************************** // 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 const int max_spaces = std::max(m_address_map.size(), m_address_config.size()); for (int spacenum = 0; spacenum < max_spaces; ++spacenum) { const address_space_config *config = space_config(spacenum); if (config != nullptr) { // validate data width int width = config->data_width(); if (width != 8 && width != 16 && width != 32 && width != 64) osd_printf_error("Invalid data width %d specified for address space %d\n", width, spacenum); // validate address shift int shift = config->addr_shift(); if (shift < 0 && (width >> -shift) < 8) osd_printf_error("Invalid shift %d specified for address space %d\n", shift, spacenum); // construct the map ::address_map addrmap(const_cast(device()), spacenum); // let the map check itself addrmap.map_validity_check(valid, spacenum); } else if (spacenum < int(m_address_map.size()) && !m_address_map[spacenum].isnull()) osd_printf_warning("Map configured for nonexistent memory space %d\n", spacenum); } }