/*************************************************************************** dimemory.c Device memory interfaces. **************************************************************************** Copyright Aaron Giles All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name 'MAME' nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ***************************************************************************/ #include "emu.h" #include "validity.h" //************************************************************************** // PARAMETERS //************************************************************************** #define DETECT_OVERLAPPING_MEMORY (0) //************************************************************************** // 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_databus_width(0), m_addrbus_width(0), m_addrbus_shift(0), m_logaddr_width(0), m_page_shift(0), m_internal_map(NULL), m_default_map(NULL) { } address_space_config::address_space_config(const char *name, endianness_t endian, UINT8 datawidth, UINT8 addrwidth, INT8 addrshift, address_map_constructor internal, address_map_constructor defmap) : m_name(name), m_endianness(endian), m_databus_width(datawidth), m_addrbus_width(addrwidth), m_addrbus_shift(addrshift), m_logaddr_width(addrwidth), m_page_shift(0), m_internal_map(internal), m_default_map(defmap) { } address_space_config::address_space_config(const char *name, endianness_t endian, UINT8 datawidth, UINT8 addrwidth, INT8 addrshift, UINT8 logwidth, UINT8 pageshift, address_map_constructor internal, address_map_constructor defmap) : m_name(name), m_endianness(endian), m_databus_width(datawidth), m_addrbus_width(addrwidth), m_addrbus_shift(addrshift), m_logaddr_width(logwidth), m_page_shift(pageshift), 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) { memset(m_address_map, 0, sizeof(m_address_map)); memset(m_addrspace, 0, sizeof(m_addrspace)); // configure the fast accessor device.m_memory = this; } //------------------------------------------------- // ~device_memory_interface - destructor //------------------------------------------------- device_memory_interface::~device_memory_interface() { } //------------------------------------------------- // static_set_vblank_int - configuration helper // to set up VBLANK interrupts on the device //------------------------------------------------- void device_memory_interface::static_set_addrmap(device_t &device, address_spacenum spacenum, address_map_constructor map) { device_memory_interface *memory; if (!device.interface(memory)) throw emu_fatalerror("MCFG_DEVICE_ADDRESS_MAP called on device '%s' with no memory interface", device.tag()); if (spacenum >= ARRAY_LENGTH(memory->m_address_map)) throw emu_fatalerror("MCFG_DEVICE_ADDRESS_MAP called with out-of-range space number %d", device.tag(), spacenum); memory->m_address_map[spacenum] = map; } //------------------------------------------------- // set_address_space - connect an address space // to a device //------------------------------------------------- void device_memory_interface::set_address_space(address_spacenum spacenum, address_space &space) { assert(spacenum < ARRAY_LENGTH(m_addrspace)); m_addrspace[spacenum] = &space; } //------------------------------------------------- // 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(address_spacenum spacenum, int intention, offs_t &address) { // by default it maps directly return true; } //------------------------------------------------- // memory_read - perform internal memory // operations that bypass the memory system; // designed to be overridden by the actual device // implementation if internal read operations are // handled by bypassing the memory system //------------------------------------------------- bool device_memory_interface::memory_read(address_spacenum spacenum, offs_t offset, int size, UINT64 &value) { // by default, we don't do anything return false; } //------------------------------------------------- // memory_write - perform internal memory // operations that bypass the memory system; // designed to be overridden by the actual device // implementation if internal write operations are // handled by bypassing the memory system //------------------------------------------------- bool device_memory_interface::memory_write(address_spacenum spacenum, offs_t offset, int size, UINT64 value) { // by default, we don't do anything return false; } //------------------------------------------------- // memory_readop - perform internal memory // operations that bypass the memory system; // designed to be overridden by the actual device // implementation if internal opcode fetching // operations are handled by bypassing the memory // system //------------------------------------------------- bool device_memory_interface::memory_readop(offs_t offset, int size, UINT64 &value) { // by default, we don't do anything return false; } //------------------------------------------------- // interface_validity_check - perform validity // checks on the memory configuration //------------------------------------------------- void device_memory_interface::interface_validity_check(validity_checker &valid) const { bool detected_overlap = DETECT_OVERLAPPING_MEMORY ? false : true; // loop over all address spaces for (address_spacenum spacenum = AS_0; spacenum < ADDRESS_SPACES; spacenum++) { const address_space_config *spaceconfig = space_config(spacenum); if (spaceconfig != NULL) { int datawidth = spaceconfig->m_databus_width; int alignunit = datawidth / 8; // construct the maps ::address_map *map = global_alloc(::address_map(const_cast(device()), spacenum)); // if this is an empty map, just skip it if (map->m_entrylist.first() == NULL) { global_free(map); continue; } // validate the global map parameters if (map->m_spacenum != spacenum) mame_printf_error("Space %d has address space %d handlers!\n", spacenum, map->m_spacenum); if (map->m_databits != datawidth) mame_printf_error("Wrong memory handlers provided for %s space! (width = %d, memory = %08x)\n", spaceconfig->m_name, datawidth, map->m_databits); // loop over entries and look for errors for (address_map_entry *entry = map->m_entrylist.first(); entry != NULL; entry = entry->next()) { UINT32 bytestart = spaceconfig->addr2byte(entry->m_addrstart); UINT32 byteend = spaceconfig->addr2byte_end(entry->m_addrend); // look for overlapping entries if (!detected_overlap) { address_map_entry *scan; for (scan = map->m_entrylist.first(); scan != entry; scan = scan->next()) if (entry->m_addrstart <= scan->m_addrend && entry->m_addrend >= scan->m_addrstart && ((entry->m_read.m_type != AMH_NONE && scan->m_read.m_type != AMH_NONE) || (entry->m_write.m_type != AMH_NONE && scan->m_write.m_type != AMH_NONE))) { mame_printf_warning("%s space has overlapping memory (%X-%X,%d,%d) vs (%X-%X,%d,%d)\n", spaceconfig->m_name, entry->m_addrstart, entry->m_addrend, entry->m_read.m_type, entry->m_write.m_type, scan->m_addrstart, scan->m_addrend, scan->m_read.m_type, scan->m_write.m_type); detected_overlap = true; break; } } // look for inverted start/end pairs if (byteend < bytestart) mame_printf_error("Wrong %s memory read handler start = %08x > end = %08x\n", spaceconfig->m_name, entry->m_addrstart, entry->m_addrend); // look for misaligned entries if ((bytestart & (alignunit - 1)) != 0 || (byteend & (alignunit - 1)) != (alignunit - 1)) mame_printf_error("Wrong %s memory read handler start = %08x, end = %08x ALIGN = %d\n", spaceconfig->m_name, entry->m_addrstart, entry->m_addrend, alignunit); // if this is a program space, auto-assign implicit ROM entries if (entry->m_read.m_type == AMH_ROM && entry->m_region == NULL) { entry->m_region = device().tag(); entry->m_rgnoffs = entry->m_addrstart; } // if this entry references a memory region, validate it if (entry->m_region != NULL && entry->m_share == 0) { // make sure we can resolve the full path to the region bool found = false; astring entry_region; device().siblingtag(entry_region, entry->m_region); // look for the region device_iterator deviter(device().mconfig().root_device()); for (device_t *device = deviter.first(); device != NULL; device = deviter.next()) for (const rom_entry *romp = rom_first_region(*device); romp != NULL && !found; romp = rom_next_region(romp)) { astring fulltag; rom_region_name(fulltag, *device, romp); if (fulltag == entry_region) { // verify the address range is within the region's bounds offs_t length = ROMREGION_GETLENGTH(romp); if (entry->m_rgnoffs + (byteend - bytestart + 1) > length) mame_printf_error("%s space memory map entry %X-%X extends beyond region '%s' size (%X)\n", spaceconfig->m_name, entry->m_addrstart, entry->m_addrend, entry->m_region, length); found = true; } } // error if not found if (!found) mame_printf_error("%s space memory map entry %X-%X references non-existant region '%s'\n", spaceconfig->m_name, entry->m_addrstart, entry->m_addrend, entry->m_region); } // make sure all devices exist if (entry->m_read.m_type == AMH_DEVICE_DELEGATE && entry->m_read.m_tag != NULL) { astring temp(entry->m_read.m_tag); if (device().siblingdevice(temp) == NULL) mame_printf_error("%s space memory map entry references nonexistant device '%s'\n", spaceconfig->m_name, entry->m_read.m_tag); } if (entry->m_write.m_type == AMH_DEVICE_DELEGATE && entry->m_write.m_tag != NULL) { astring temp(entry->m_write.m_tag); if (device().siblingdevice(temp) == NULL) mame_printf_error("%s space memory map entry references nonexistant device '%s'\n", spaceconfig->m_name, entry->m_write.m_tag); } // make sure ports exist // if ((entry->m_read.m_type == AMH_PORT && entry->m_read.m_tag != NULL && portlist.find(entry->m_read.m_tag) == NULL) || // (entry->m_write.m_type == AMH_PORT && entry->m_write.m_tag != NULL && portlist.find(entry->m_write.m_tag) == NULL)) // mame_printf_error("%s space memory map entry references nonexistant port tag '%s'\n", spaceconfig->m_name, entry->m_read.m_tag); // validate bank and share tags if (entry->m_read.m_type == AMH_BANK) valid.validate_tag(entry->m_read.m_tag); if (entry->m_write.m_type == AMH_BANK) valid.validate_tag(entry->m_write.m_tag); if (entry->m_share != NULL) valid.validate_tag(entry->m_share); } // release the address map global_free(map); } } }